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2428 rindas
91 KiB
2428 rindas
91 KiB
/**********************************************************************************************
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*
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* rshapes - Basic functions to draw 2d shapes and check collisions
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*
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* ADDITIONAL NOTES:
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* Shapes can be draw using 3 types of primitives: LINES, TRIANGLES and QUADS.
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* Some functions implement two drawing options: TRIANGLES and QUADS, by default TRIANGLES
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* are used but QUADS implementation can be selected with SUPPORT_QUADS_DRAW_MODE define
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*
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* Some functions define texture coordinates (rlTexCoord2f()) for the shapes and use a
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* user-provided texture with SetShapesTexture(), the pourpouse of this implementation
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* is allowing to reduce draw calls when combined with a texture-atlas.
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*
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* By default, raylib sets the default texture and rectangle at InitWindow()[rcore] to one
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* white character of default font [rtext], this way, raylib text and shapes can be draw with
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* a single draw call and it also allows users to configure it the same way with their own fonts.
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*
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* CONFIGURATION:
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* #define SUPPORT_MODULE_RSHAPES
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* rshapes module is included in the build
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*
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* #define SUPPORT_QUADS_DRAW_MODE
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* Use QUADS instead of TRIANGLES for drawing when possible. Lines-based shapes still use LINES
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*
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*
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* LICENSE: zlib/libpng
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*
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* Copyright (c) 2013-2025 Ramon Santamaria (@raysan5)
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*
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* This software is provided "as-is", without any express or implied warranty. In no event
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* will the authors be held liable for any damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose, including commercial
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* applications, and to alter it and redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not claim that you
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* wrote the original software. If you use this software in a product, an acknowledgment
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* in the product documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
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* as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*
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**********************************************************************************************/
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#include "raylib.h" // Declares module functions
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// Check if config flags have been externally provided on compilation line
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#if !defined(EXTERNAL_CONFIG_FLAGS)
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#include "config.h" // Defines module configuration flags
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#endif
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#if defined(SUPPORT_MODULE_RSHAPES)
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#include "rlgl.h" // OpenGL abstraction layer to OpenGL 1.1, 2.1, 3.3+ or ES2
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#include <math.h> // Required for: sinf(), asinf(), cosf(), acosf(), sqrtf(), fabsf()
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#include <float.h> // Required for: FLT_EPSILON
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#include <stdlib.h> // Required for: RL_FREE
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//----------------------------------------------------------------------------------
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// Defines and Macros
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//----------------------------------------------------------------------------------
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// Error rate to calculate how many segments we need to draw a smooth circle,
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// taken from https://stackoverflow.com/a/2244088
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#ifndef SMOOTH_CIRCLE_ERROR_RATE
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#define SMOOTH_CIRCLE_ERROR_RATE 0.5f // Circle error rate
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#endif
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#ifndef SPLINE_SEGMENT_DIVISIONS
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#define SPLINE_SEGMENT_DIVISIONS 24 // Spline segment divisions
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#endif
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//----------------------------------------------------------------------------------
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// Types and Structures Definition
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//----------------------------------------------------------------------------------
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// Not here...
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//----------------------------------------------------------------------------------
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// Global Variables Definition
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//----------------------------------------------------------------------------------
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static Texture2D texShapes = { 1, 1, 1, 1, 7 }; // Texture used on shapes drawing (white pixel loaded by rlgl)
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static Rectangle texShapesRec = { 0.0f, 0.0f, 1.0f, 1.0f }; // Texture source rectangle used on shapes drawing
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//----------------------------------------------------------------------------------
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// Module specific Functions Declaration
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//----------------------------------------------------------------------------------
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static float EaseCubicInOut(float t, float b, float c, float d); // Cubic easing
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//----------------------------------------------------------------------------------
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// Module Functions Definition
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//----------------------------------------------------------------------------------
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// Set texture and rectangle to be used on shapes drawing
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// NOTE: It can be useful when using basic shapes and one single font,
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// defining a font char white rectangle would allow drawing everything in a single draw call
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void SetShapesTexture(Texture2D texture, Rectangle source)
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{
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// Reset texture to default pixel if required
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// WARNING: Shapes texture should be probably better validated,
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// it can break the rendering of all shapes if misused
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if ((texture.id == 0) || (source.width == 0) || (source.height == 0))
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{
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texShapes = (Texture2D){ 1, 1, 1, 1, 7 };
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texShapesRec = (Rectangle){ 0.0f, 0.0f, 1.0f, 1.0f };
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}
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else
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{
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texShapes = texture;
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texShapesRec = source;
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}
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}
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// Get texture that is used for shapes drawing
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Texture2D GetShapesTexture(void)
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{
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return texShapes;
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}
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// Get texture source rectangle that is used for shapes drawing
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Rectangle GetShapesTextureRectangle(void)
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{
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return texShapesRec;
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}
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// Draw a pixel
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void DrawPixel(int posX, int posY, Color color)
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{
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DrawPixelV((Vector2){ (float)posX, (float)posY }, color);
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}
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// Draw a pixel (Vector version)
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void DrawPixelV(Vector2 position, Color color)
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{
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#if defined(SUPPORT_QUADS_DRAW_MODE)
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rlSetTexture(GetShapesTexture().id);
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Rectangle shapeRect = GetShapesTextureRectangle();
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rlBegin(RL_QUADS);
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rlNormal3f(0.0f, 0.0f, 1.0f);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(position.x, position.y);
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rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(position.x, position.y + 1);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(position.x + 1, position.y + 1);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(position.x + 1, position.y);
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rlEnd();
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rlSetTexture(0);
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#else
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rlBegin(RL_TRIANGLES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(position.x, position.y);
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rlVertex2f(position.x, position.y + 1);
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rlVertex2f(position.x + 1, position.y);
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rlVertex2f(position.x + 1, position.y);
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rlVertex2f(position.x, position.y + 1);
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rlVertex2f(position.x + 1, position.y + 1);
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rlEnd();
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#endif
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}
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// Draw a line (using gl lines)
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void DrawLine(int startPosX, int startPosY, int endPosX, int endPosY, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f((float)startPosX, (float)startPosY);
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rlVertex2f((float)endPosX, (float)endPosY);
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rlEnd();
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}
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// Draw a line (using gl lines)
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void DrawLineV(Vector2 startPos, Vector2 endPos, Color color)
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{
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(startPos.x, startPos.y);
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rlVertex2f(endPos.x, endPos.y);
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rlEnd();
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}
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// Draw lines sequuence (using gl lines)
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void DrawLineStrip(const Vector2 *points, int pointCount, Color color)
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{
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if (pointCount < 2) return; // Security check
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rlBegin(RL_LINES);
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rlColor4ub(color.r, color.g, color.b, color.a);
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for (int i = 0; i < pointCount - 1; i++)
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{
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rlVertex2f(points[i].x, points[i].y);
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rlVertex2f(points[i + 1].x, points[i + 1].y);
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}
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rlEnd();
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}
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// Draw line using cubic-bezier spline, in-out interpolation, no control points
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void DrawLineBezier(Vector2 startPos, Vector2 endPos, float thick, Color color)
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{
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Vector2 previous = startPos;
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Vector2 current = { 0 };
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Vector2 points[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
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for (int i = 1; i <= SPLINE_SEGMENT_DIVISIONS; i++)
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{
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// Cubic easing in-out
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// NOTE: Easing is calculated only for y position value
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current.y = EaseCubicInOut((float)i, startPos.y, endPos.y - startPos.y, (float)SPLINE_SEGMENT_DIVISIONS);
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current.x = previous.x + (endPos.x - startPos.x)/(float)SPLINE_SEGMENT_DIVISIONS;
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float dy = current.y - previous.y;
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float dx = current.x - previous.x;
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float size = 0.5f*thick/sqrtf(dx*dx+dy*dy);
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if (i == 1)
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{
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points[0].x = previous.x + dy*size;
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points[0].y = previous.y - dx*size;
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points[1].x = previous.x - dy*size;
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points[1].y = previous.y + dx*size;
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}
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points[2*i + 1].x = current.x - dy*size;
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points[2*i + 1].y = current.y + dx*size;
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points[2*i].x = current.x + dy*size;
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points[2*i].y = current.y - dx*size;
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previous = current;
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}
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DrawTriangleStrip(points, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
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}
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// Draw a line defining thickness
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void DrawLineEx(Vector2 startPos, Vector2 endPos, float thick, Color color)
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{
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Vector2 delta = { endPos.x - startPos.x, endPos.y - startPos.y };
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float length = sqrtf(delta.x*delta.x + delta.y*delta.y);
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if ((length > 0) && (thick > 0))
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{
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float scale = thick/(2*length);
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Vector2 radius = { -scale*delta.y, scale*delta.x };
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Vector2 strip[4] = {
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{ startPos.x - radius.x, startPos.y - radius.y },
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{ startPos.x + radius.x, startPos.y + radius.y },
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{ endPos.x - radius.x, endPos.y - radius.y },
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{ endPos.x + radius.x, endPos.y + radius.y }
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};
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DrawTriangleStrip(strip, 4, color);
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}
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}
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// Draw a color-filled circle
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void DrawCircle(int centerX, int centerY, float radius, Color color)
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{
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DrawCircleV((Vector2){ (float)centerX, (float)centerY }, radius, color);
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}
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// Draw a color-filled circle (Vector version)
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// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues
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void DrawCircleV(Vector2 center, float radius, Color color)
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{
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DrawCircleSector(center, radius, 0, 360, 36, color);
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}
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// Draw a piece of a circle
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void DrawCircleSector(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color)
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{
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if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero
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// Function expects (endAngle > startAngle)
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if (endAngle < startAngle)
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{
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// Swap values
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float tmp = startAngle;
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startAngle = endAngle;
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endAngle = tmp;
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}
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int minSegments = (int)ceilf((endAngle - startAngle)/90);
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if (segments < minSegments)
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{
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// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
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float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
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segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
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if (segments <= 0) segments = minSegments;
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}
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float stepLength = (endAngle - startAngle)/(float)segments;
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float angle = startAngle;
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#if defined(SUPPORT_QUADS_DRAW_MODE)
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rlSetTexture(GetShapesTexture().id);
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Rectangle shapeRect = GetShapesTextureRectangle();
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rlBegin(RL_QUADS);
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// NOTE: Every QUAD actually represents two segments
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for (int i = 0; i < segments/2; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(center.x, center.y);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength*2.0f))*radius, center.y + sinf(DEG2RAD*(angle + stepLength*2.0f))*radius);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
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rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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angle += (stepLength*2.0f);
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}
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// NOTE: In case number of segments is odd, we add one last piece to the cake
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if ((((unsigned int)segments)%2) == 1)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(center.x, center.y);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
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rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
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rlVertex2f(center.x, center.y);
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}
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rlEnd();
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rlSetTexture(0);
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#else
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rlBegin(RL_TRIANGLES);
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for (int i = 0; i < segments; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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angle += stepLength;
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}
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rlEnd();
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#endif
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}
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// Draw a piece of a circle outlines
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void DrawCircleSectorLines(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color)
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{
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if (radius <= 0.0f) radius = 0.1f; // Avoid div by zero issue
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// Function expects (endAngle > startAngle)
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if (endAngle < startAngle)
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{
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// Swap values
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float tmp = startAngle;
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startAngle = endAngle;
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endAngle = tmp;
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}
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int minSegments = (int)ceilf((endAngle - startAngle)/90);
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if (segments < minSegments)
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{
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// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
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float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
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segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
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if (segments <= 0) segments = minSegments;
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}
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float stepLength = (endAngle - startAngle)/(float)segments;
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float angle = startAngle;
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bool showCapLines = true;
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rlBegin(RL_LINES);
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if (showCapLines)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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}
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for (int i = 0; i < segments; i++)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
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angle += stepLength;
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}
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if (showCapLines)
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{
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rlColor4ub(color.r, color.g, color.b, color.a);
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rlVertex2f(center.x, center.y);
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rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
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}
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rlEnd();
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}
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// Draw a gradient-filled circle
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void DrawCircleGradient(int centerX, int centerY, float radius, Color inner, Color outer)
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{
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rlBegin(RL_TRIANGLES);
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for (int i = 0; i < 360; i += 10)
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{
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rlColor4ub(inner.r, inner.g, inner.b, inner.a);
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rlVertex2f((float)centerX, (float)centerY);
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rlColor4ub(outer.r, outer.g, outer.b, outer.a);
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rlVertex2f((float)centerX + cosf(DEG2RAD*(i + 10))*radius, (float)centerY + sinf(DEG2RAD*(i + 10))*radius);
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rlColor4ub(outer.r, outer.g, outer.b, outer.a);
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rlVertex2f((float)centerX + cosf(DEG2RAD*i)*radius, (float)centerY + sinf(DEG2RAD*i)*radius);
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}
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rlEnd();
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}
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// Draw circle outline
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void DrawCircleLines(int centerX, int centerY, float radius, Color color)
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{
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DrawCircleLinesV((Vector2){ (float)centerX, (float)centerY }, radius, color);
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}
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// Draw circle outline (Vector version)
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void DrawCircleLinesV(Vector2 center, float radius, Color color)
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|
{
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
// NOTE: Circle outline is drawn pixel by pixel every degree (0 to 360)
|
|
for (int i = 0; i < 360; i += 10)
|
|
{
|
|
rlVertex2f(center.x + cosf(DEG2RAD*i)*radius, center.y + sinf(DEG2RAD*i)*radius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(i + 10))*radius, center.y + sinf(DEG2RAD*(i + 10))*radius);
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw ellipse
|
|
void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, Color color)
|
|
{
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < 360; i += 10)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f((float)centerX, (float)centerY);
|
|
rlVertex2f((float)centerX + cosf(DEG2RAD*(i + 10))*radiusH, (float)centerY + sinf(DEG2RAD*(i + 10))*radiusV);
|
|
rlVertex2f((float)centerX + cosf(DEG2RAD*i)*radiusH, (float)centerY + sinf(DEG2RAD*i)*radiusV);
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw ellipse outline
|
|
void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color)
|
|
{
|
|
rlBegin(RL_LINES);
|
|
for (int i = 0; i < 360; i += 10)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(centerX + cosf(DEG2RAD*(i + 10))*radiusH, centerY + sinf(DEG2RAD*(i + 10))*radiusV);
|
|
rlVertex2f(centerX + cosf(DEG2RAD*i)*radiusH, centerY + sinf(DEG2RAD*i)*radiusV);
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw ring
|
|
void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color)
|
|
{
|
|
if (startAngle == endAngle) return;
|
|
|
|
// Function expects (outerRadius > innerRadius)
|
|
if (outerRadius < innerRadius)
|
|
{
|
|
float tmp = outerRadius;
|
|
outerRadius = innerRadius;
|
|
innerRadius = tmp;
|
|
|
|
if (outerRadius <= 0.0f) outerRadius = 0.1f;
|
|
}
|
|
|
|
// Function expects (endAngle > startAngle)
|
|
if (endAngle < startAngle)
|
|
{
|
|
// Swap values
|
|
float tmp = startAngle;
|
|
startAngle = endAngle;
|
|
endAngle = tmp;
|
|
}
|
|
|
|
int minSegments = (int)ceilf((endAngle - startAngle)/90);
|
|
|
|
if (segments < minSegments)
|
|
{
|
|
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
|
|
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
|
|
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
|
|
|
|
if (segments <= 0) segments = minSegments;
|
|
}
|
|
|
|
// Not a ring
|
|
if (innerRadius <= 0.0f)
|
|
{
|
|
DrawCircleSector(center, outerRadius, startAngle, endAngle, segments, color);
|
|
return;
|
|
}
|
|
|
|
float stepLength = (endAngle - startAngle)/(float)segments;
|
|
float angle = startAngle;
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
rlEnd();
|
|
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw ring outline
|
|
void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color)
|
|
{
|
|
if (startAngle == endAngle) return;
|
|
|
|
// Function expects (outerRadius > innerRadius)
|
|
if (outerRadius < innerRadius)
|
|
{
|
|
float tmp = outerRadius;
|
|
outerRadius = innerRadius;
|
|
innerRadius = tmp;
|
|
|
|
if (outerRadius <= 0.0f) outerRadius = 0.1f;
|
|
}
|
|
|
|
// Function expects (endAngle > startAngle)
|
|
if (endAngle < startAngle)
|
|
{
|
|
// Swap values
|
|
float tmp = startAngle;
|
|
startAngle = endAngle;
|
|
endAngle = tmp;
|
|
}
|
|
|
|
int minSegments = (int)ceilf((endAngle - startAngle)/90);
|
|
|
|
if (segments < minSegments)
|
|
{
|
|
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
|
|
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/outerRadius, 2) - 1);
|
|
segments = (int)((endAngle - startAngle)*ceilf(2*PI/th)/360);
|
|
|
|
if (segments <= 0) segments = minSegments;
|
|
}
|
|
|
|
if (innerRadius <= 0.0f)
|
|
{
|
|
DrawCircleSectorLines(center, outerRadius, startAngle, endAngle, segments, color);
|
|
return;
|
|
}
|
|
|
|
float stepLength = (endAngle - startAngle)/(float)segments;
|
|
float angle = startAngle;
|
|
bool showCapLines = true;
|
|
|
|
rlBegin(RL_LINES);
|
|
if (showCapLines)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
}
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
|
|
if (showCapLines)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw a color-filled rectangle
|
|
void DrawRectangle(int posX, int posY, int width, int height, Color color)
|
|
{
|
|
DrawRectangleV((Vector2){ (float)posX, (float)posY }, (Vector2){ (float)width, (float)height }, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle (Vector version)
|
|
// NOTE: On OpenGL 3.3 and ES2 we use QUADS to avoid drawing order issues
|
|
void DrawRectangleV(Vector2 position, Vector2 size, Color color)
|
|
{
|
|
DrawRectanglePro((Rectangle){ position.x, position.y, size.x, size.y }, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle
|
|
void DrawRectangleRec(Rectangle rec, Color color)
|
|
{
|
|
DrawRectanglePro(rec, (Vector2){ 0.0f, 0.0f }, 0.0f, color);
|
|
}
|
|
|
|
// Draw a color-filled rectangle with pro parameters
|
|
void DrawRectanglePro(Rectangle rec, Vector2 origin, float rotation, Color color)
|
|
{
|
|
Vector2 topLeft = { 0 };
|
|
Vector2 topRight = { 0 };
|
|
Vector2 bottomLeft = { 0 };
|
|
Vector2 bottomRight = { 0 };
|
|
|
|
// Only calculate rotation if needed
|
|
if (rotation == 0.0f)
|
|
{
|
|
float x = rec.x - origin.x;
|
|
float y = rec.y - origin.y;
|
|
topLeft = (Vector2){ x, y };
|
|
topRight = (Vector2){ x + rec.width, y };
|
|
bottomLeft = (Vector2){ x, y + rec.height };
|
|
bottomRight = (Vector2){ x + rec.width, y + rec.height };
|
|
}
|
|
else
|
|
{
|
|
float sinRotation = sinf(rotation*DEG2RAD);
|
|
float cosRotation = cosf(rotation*DEG2RAD);
|
|
float x = rec.x;
|
|
float y = rec.y;
|
|
float dx = -origin.x;
|
|
float dy = -origin.y;
|
|
|
|
topLeft.x = x + dx*cosRotation - dy*sinRotation;
|
|
topLeft.y = y + dx*sinRotation + dy*cosRotation;
|
|
|
|
topRight.x = x + (dx + rec.width)*cosRotation - dy*sinRotation;
|
|
topRight.y = y + (dx + rec.width)*sinRotation + dy*cosRotation;
|
|
|
|
bottomLeft.x = x + dx*cosRotation - (dy + rec.height)*sinRotation;
|
|
bottomLeft.y = y + dx*sinRotation + (dy + rec.height)*cosRotation;
|
|
|
|
bottomRight.x = x + (dx + rec.width)*cosRotation - (dy + rec.height)*sinRotation;
|
|
bottomRight.y = y + (dx + rec.width)*sinRotation + (dy + rec.height)*cosRotation;
|
|
}
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
|
|
rlNormal3f(0.0f, 0.0f, 1.0f);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(topLeft.x, topLeft.y);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(bottomLeft.x, bottomLeft.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(bottomRight.x, bottomRight.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(topRight.x, topRight.y);
|
|
|
|
rlEnd();
|
|
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(topLeft.x, topLeft.y);
|
|
rlVertex2f(bottomLeft.x, bottomLeft.y);
|
|
rlVertex2f(topRight.x, topRight.y);
|
|
|
|
rlVertex2f(topRight.x, topRight.y);
|
|
rlVertex2f(bottomLeft.x, bottomLeft.y);
|
|
rlVertex2f(bottomRight.x, bottomRight.y);
|
|
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw a vertical-gradient-filled rectangle
|
|
void DrawRectangleGradientV(int posX, int posY, int width, int height, Color top, Color bottom)
|
|
{
|
|
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, top, bottom, bottom, top);
|
|
}
|
|
|
|
// Draw a horizontal-gradient-filled rectangle
|
|
void DrawRectangleGradientH(int posX, int posY, int width, int height, Color left, Color right)
|
|
{
|
|
DrawRectangleGradientEx((Rectangle){ (float)posX, (float)posY, (float)width, (float)height }, left, left, right, right);
|
|
}
|
|
|
|
// Draw a gradient-filled rectangle
|
|
void DrawRectangleGradientEx(Rectangle rec, Color topLeft, Color bottomLeft, Color topRight, Color bottomRight)
|
|
{
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
rlNormal3f(0.0f, 0.0f, 1.0f);
|
|
|
|
// NOTE: Default raylib font character 95 is a white square
|
|
rlColor4ub(topLeft.r, topLeft.g, topLeft.b, topLeft.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(rec.x, rec.y);
|
|
|
|
rlColor4ub(bottomLeft.r, bottomLeft.g, bottomLeft.b, bottomLeft.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(rec.x, rec.y + rec.height);
|
|
|
|
rlColor4ub(topRight.r, topRight.g, topRight.b, topRight.a);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(rec.x + rec.width, rec.y + rec.height);
|
|
|
|
rlColor4ub(bottomRight.r, bottomRight.g, bottomRight.b, bottomRight.a);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(rec.x + rec.width, rec.y);
|
|
rlEnd();
|
|
|
|
rlSetTexture(0);
|
|
}
|
|
|
|
// Draw rectangle outline
|
|
// WARNING: All Draw*Lines() functions use RL_LINES for drawing,
|
|
// it implies flushing the current batch and changing draw mode to RL_LINES
|
|
// but it solves another issue: https://github.com/raysan5/raylib/issues/3884
|
|
void DrawRectangleLines(int posX, int posY, int width, int height, Color color)
|
|
{
|
|
Matrix mat = rlGetMatrixTransform();
|
|
float xOffset = 0.5f/mat.m0;
|
|
float yOffset = 0.5f/mat.m5;
|
|
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f((float)posX + xOffset, (float)posY + yOffset);
|
|
rlVertex2f((float)posX + (float)width - xOffset, (float)posY + yOffset);
|
|
|
|
rlVertex2f((float)posX + (float)width - xOffset, (float)posY + yOffset);
|
|
rlVertex2f((float)posX + (float)width - xOffset, (float)posY + (float)height - yOffset);
|
|
|
|
rlVertex2f((float)posX + (float)width - xOffset, (float)posY + (float)height - yOffset);
|
|
rlVertex2f((float)posX + xOffset, (float)posY + (float)height - yOffset);
|
|
|
|
rlVertex2f((float)posX + xOffset, (float)posY + (float)height - yOffset);
|
|
rlVertex2f((float)posX + xOffset, (float)posY + yOffset);
|
|
rlEnd();
|
|
|
|
/*
|
|
// Previous implementation, it has issues... but it does not require view matrix...
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
DrawRectangle(posX, posY, width, 1, color);
|
|
DrawRectangle(posX + width - 1, posY + 1, 1, height - 2, color);
|
|
DrawRectangle(posX, posY + height - 1, width, 1, color);
|
|
DrawRectangle(posX, posY + 1, 1, height - 2, color);
|
|
#else
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f((float)posX, (float)posY);
|
|
rlVertex2f((float)posX + (float)width, (float)posY + 1);
|
|
|
|
rlVertex2f((float)posX + (float)width, (float)posY + 1);
|
|
rlVertex2f((float)posX + (float)width, (float)posY + (float)height);
|
|
|
|
rlVertex2f((float)posX + (float)width, (float)posY + (float)height);
|
|
rlVertex2f((float)posX + 1, (float)posY + (float)height);
|
|
|
|
rlVertex2f((float)posX + 1, (float)posY + (float)height);
|
|
rlVertex2f((float)posX + 1, (float)posY + 1);
|
|
rlEnd();
|
|
#endif
|
|
*/
|
|
}
|
|
|
|
// Draw rectangle outline with extended parameters
|
|
void DrawRectangleLinesEx(Rectangle rec, float lineThick, Color color)
|
|
{
|
|
if ((lineThick > rec.width) || (lineThick > rec.height))
|
|
{
|
|
if (rec.width >= rec.height) lineThick = rec.height/2;
|
|
else if (rec.width <= rec.height) lineThick = rec.width/2;
|
|
}
|
|
|
|
// When rec = { x, y, 8.0f, 6.0f } and lineThick = 2, the following
|
|
// four rectangles are drawn ([T]op, [B]ottom, [L]eft, [R]ight):
|
|
//
|
|
// TTTTTTTT
|
|
// TTTTTTTT
|
|
// LL RR
|
|
// LL RR
|
|
// BBBBBBBB
|
|
// BBBBBBBB
|
|
//
|
|
|
|
Rectangle top = { rec.x, rec.y, rec.width, lineThick };
|
|
Rectangle bottom = { rec.x, rec.y - lineThick + rec.height, rec.width, lineThick };
|
|
Rectangle left = { rec.x, rec.y + lineThick, lineThick, rec.height - lineThick*2.0f };
|
|
Rectangle right = { rec.x - lineThick + rec.width, rec.y + lineThick, lineThick, rec.height - lineThick*2.0f };
|
|
|
|
DrawRectangleRec(top, color);
|
|
DrawRectangleRec(bottom, color);
|
|
DrawRectangleRec(left, color);
|
|
DrawRectangleRec(right, color);
|
|
}
|
|
|
|
// Draw rectangle with rounded edges
|
|
void DrawRectangleRounded(Rectangle rec, float roundness, int segments, Color color)
|
|
{
|
|
// Not a rounded rectangle
|
|
if (roundness <= 0.0f)
|
|
{
|
|
DrawRectangleRec(rec, color);
|
|
return;
|
|
}
|
|
|
|
if (roundness >= 1.0f) roundness = 1.0f;
|
|
|
|
// Calculate corner radius
|
|
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
|
|
if (radius <= 0.0f) return;
|
|
|
|
// Calculate number of segments to use for the corners
|
|
if (segments < 4)
|
|
{
|
|
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
|
|
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
|
|
segments = (int)(ceilf(2*PI/th)/4.0f);
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
float stepLength = 90.0f/(float)segments;
|
|
|
|
/*
|
|
Quick sketch to make sense of all of this,
|
|
there are 9 parts to draw, also mark the 12 points we'll use
|
|
|
|
P0____________________P1
|
|
/| |\
|
|
/1| 2 |3\
|
|
P7 /__|____________________|__\ P2
|
|
| |P8 P9| |
|
|
| 8 | 9 | 4 |
|
|
| __|____________________|__ |
|
|
P6 \ |P11 P10| / P3
|
|
\7| 6 |5/
|
|
\|____________________|/
|
|
P5 P4
|
|
*/
|
|
// Coordinates of the 12 points that define the rounded rect
|
|
const Vector2 point[12] = {
|
|
{(float)rec.x + radius, rec.y}, {(float)(rec.x + rec.width) - radius, rec.y}, { rec.x + rec.width, (float)rec.y + radius }, // PO, P1, P2
|
|
{rec.x + rec.width, (float)(rec.y + rec.height) - radius}, {(float)(rec.x + rec.width) - radius, rec.y + rec.height}, // P3, P4
|
|
{(float)rec.x + radius, rec.y + rec.height}, { rec.x, (float)(rec.y + rec.height) - radius}, {rec.x, (float)rec.y + radius}, // P5, P6, P7
|
|
{(float)rec.x + radius, (float)rec.y + radius}, {(float)(rec.x + rec.width) - radius, (float)rec.y + radius}, // P8, P9
|
|
{(float)(rec.x + rec.width) - radius, (float)(rec.y + rec.height) - radius}, {(float)rec.x + radius, (float)(rec.y + rec.height) - radius} // P10, P11
|
|
};
|
|
|
|
const Vector2 centers[4] = { point[8], point[9], point[10], point[11] };
|
|
const float angles[4] = { 180.0f, 270.0f, 0.0f, 90.0f };
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
// Draw all the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
|
|
// NOTE: Every QUAD actually represents two segments
|
|
for (int i = 0; i < segments/2; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x, center.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength*2))*radius, center.y + sinf(DEG2RAD*(angle + stepLength*2))*radius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
|
|
|
|
angle += (stepLength*2);
|
|
}
|
|
|
|
// NOTE: In case number of segments is odd, we add one last piece to the cake
|
|
if (segments%2)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x, center.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x, center.y);
|
|
}
|
|
}
|
|
|
|
// [2] Upper Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
|
|
// [4] Right Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// [6] Bottom Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
|
|
// [8] Left Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
|
|
// [9] Middle Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
rlEnd();
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
|
|
// Draw all of the 4 corners: [1] Upper Left Corner, [3] Upper Right Corner, [5] Lower Right Corner, [7] Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x, center.y);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*radius, center.y + sinf(DEG2RAD*(angle + stepLength))*radius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*radius, center.y + sinf(DEG2RAD*angle)*radius);
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// [2] Upper Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
// [4] Right Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// [6] Bottom Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
|
|
// [8] Left Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
|
|
// [9] Middle Rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw rectangle with rounded edges
|
|
// TODO: This function should be refactored to use RL_LINES, for consistency with other Draw*Lines()
|
|
void DrawRectangleRoundedLines(Rectangle rec, float roundness, int segments, Color color)
|
|
{
|
|
DrawRectangleRoundedLinesEx(rec, roundness, segments, 1.0f, color);
|
|
}
|
|
|
|
// Draw rectangle with rounded edges outline
|
|
void DrawRectangleRoundedLinesEx(Rectangle rec, float roundness, int segments, float lineThick, Color color)
|
|
{
|
|
if (lineThick < 0) lineThick = 0;
|
|
|
|
// Not a rounded rectangle
|
|
if (roundness <= 0.0f)
|
|
{
|
|
DrawRectangleLinesEx((Rectangle){rec.x-lineThick, rec.y-lineThick, rec.width+2*lineThick, rec.height+2*lineThick}, lineThick, color);
|
|
return;
|
|
}
|
|
|
|
if (roundness >= 1.0f) roundness = 1.0f;
|
|
|
|
// Calculate corner radius
|
|
float radius = (rec.width > rec.height)? (rec.height*roundness)/2 : (rec.width*roundness)/2;
|
|
if (radius <= 0.0f) return;
|
|
|
|
// Calculate number of segments to use for the corners
|
|
if (segments < 4)
|
|
{
|
|
// Calculate the maximum angle between segments based on the error rate (usually 0.5f)
|
|
float th = acosf(2*powf(1 - SMOOTH_CIRCLE_ERROR_RATE/radius, 2) - 1);
|
|
segments = (int)(ceilf(2*PI/th)/2.0f);
|
|
if (segments <= 0) segments = 4;
|
|
}
|
|
|
|
float stepLength = 90.0f/(float)segments;
|
|
const float outerRadius = radius + lineThick, innerRadius = radius;
|
|
|
|
/*
|
|
Quick sketch to make sense of all of this,
|
|
marks the 16 + 4(corner centers P16-19) points we'll use
|
|
|
|
P0 ================== P1
|
|
// P8 P9 \\
|
|
// \\
|
|
P7 // P15 P10 \\ P2
|
|
|| *P16 P17* ||
|
|
|| ||
|
|
|| P14 P11 ||
|
|
P6 \\ *P19 P18* // P3
|
|
\\ //
|
|
\\ P13 P12 //
|
|
P5 ================== P4
|
|
*/
|
|
const Vector2 point[16] = {
|
|
{(float)rec.x + innerRadius + 0.5f, rec.y - lineThick + 0.5f},
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y - lineThick + 0.5f},
|
|
{rec.x + rec.width + lineThick - 0.5f, (float)rec.y + innerRadius + 0.5f}, // PO, P1, P2
|
|
{rec.x + rec.width + lineThick - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + rec.height + lineThick - 0.5f}, // P3, P4
|
|
{(float)rec.x + innerRadius + 0.5f, rec.y + rec.height + lineThick - 0.5f},
|
|
{rec.x - lineThick + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
|
|
{rec.x - lineThick + 0.5f, (float)rec.y + innerRadius + 0.5f}, // P5, P6, P7
|
|
{(float)rec.x + innerRadius + 0.5f, rec.y + 0.5f},
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + 0.5f}, // P8, P9
|
|
{rec.x + rec.width - 0.5f, (float)rec.y + innerRadius + 0.5f},
|
|
{rec.x + rec.width - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f}, // P10, P11
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, rec.y + rec.height - 0.5f},
|
|
{(float)rec.x + innerRadius + 0.5f, rec.y + rec.height - 0.5f}, // P12, P13
|
|
{rec.x + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
|
|
{rec.x + 0.5f, (float)rec.y + innerRadius + 0.5f} // P14, P15
|
|
};
|
|
|
|
const Vector2 centers[4] = {
|
|
{(float)rec.x + innerRadius + 0.5f, (float)rec.y + innerRadius + 0.5f},
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, (float)rec.y + innerRadius + 0.5f}, // P16, P17
|
|
{(float)(rec.x + rec.width) - innerRadius - 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f},
|
|
{(float)rec.x + innerRadius + 0.5f, (float)(rec.y + rec.height) - innerRadius - 0.5f} // P18, P19
|
|
};
|
|
|
|
const float angles[4] = { 180.0f, 270.0f, 0.0f, 90.0f };
|
|
|
|
if (lineThick > 1)
|
|
{
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
|
|
// Draw all the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// Upper rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
|
|
// Right rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// Lower rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[12].x, point[12].y);
|
|
|
|
// Left rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[15].x, point[15].y);
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
|
|
rlEnd();
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
|
|
// Draw all of the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*innerRadius, center.y + sinf(DEG2RAD*angle)*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*innerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*innerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// Upper rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[8].x, point[8].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
rlVertex2f(point[1].x, point[1].y);
|
|
rlVertex2f(point[0].x, point[0].y);
|
|
rlVertex2f(point[9].x, point[9].y);
|
|
|
|
// Right rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[11].x, point[11].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
rlVertex2f(point[2].x, point[2].y);
|
|
rlVertex2f(point[10].x, point[10].y);
|
|
rlVertex2f(point[3].x, point[3].y);
|
|
|
|
// Lower rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlVertex2f(point[5].x, point[5].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
rlVertex2f(point[12].x, point[12].y);
|
|
rlVertex2f(point[13].x, point[13].y);
|
|
rlVertex2f(point[4].x, point[4].y);
|
|
|
|
// Left rectangle
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[6].x, point[6].y);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
rlVertex2f(point[15].x, point[15].y);
|
|
rlVertex2f(point[7].x, point[7].y);
|
|
rlVertex2f(point[14].x, point[14].y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
// Use LINES to draw the outline
|
|
rlBegin(RL_LINES);
|
|
|
|
// Draw all the 4 corners first: Upper Left Corner, Upper Right Corner, Lower Right Corner, Lower Left Corner
|
|
for (int k = 0; k < 4; ++k) // Hope the compiler is smart enough to unroll this loop
|
|
{
|
|
float angle = angles[k];
|
|
const Vector2 center = centers[k];
|
|
|
|
for (int i = 0; i < segments; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*angle)*outerRadius, center.y + sinf(DEG2RAD*angle)*outerRadius);
|
|
rlVertex2f(center.x + cosf(DEG2RAD*(angle + stepLength))*outerRadius, center.y + sinf(DEG2RAD*(angle + stepLength))*outerRadius);
|
|
angle += stepLength;
|
|
}
|
|
}
|
|
|
|
// And now the remaining 4 lines
|
|
for (int i = 0; i < 8; i += 2)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(point[i].x, point[i].y);
|
|
rlVertex2f(point[i + 1].x, point[i + 1].y);
|
|
}
|
|
|
|
rlEnd();
|
|
}
|
|
}
|
|
|
|
// Draw a triangle
|
|
// NOTE: Vertex must be provided in counter-clockwise order
|
|
void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
|
|
{
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(v1.x, v1.y);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlEnd();
|
|
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlVertex2f(v2.x, v2.y);
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw a triangle using lines
|
|
// NOTE: Vertex must be provided in counter-clockwise order
|
|
void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color)
|
|
{
|
|
rlBegin(RL_LINES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlVertex2f(v2.x, v2.y);
|
|
|
|
rlVertex2f(v2.x, v2.y);
|
|
rlVertex2f(v3.x, v3.y);
|
|
|
|
rlVertex2f(v3.x, v3.y);
|
|
rlVertex2f(v1.x, v1.y);
|
|
rlEnd();
|
|
}
|
|
|
|
// Draw a triangle fan defined by points
|
|
// NOTE: First vertex provided is the center, shared by all triangles
|
|
// By default, following vertex should be provided in counter-clockwise order
|
|
void DrawTriangleFan(const Vector2 *points, int pointCount, Color color)
|
|
{
|
|
if (pointCount >= 3)
|
|
{
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
for (int i = 1; i < pointCount - 1; i++)
|
|
{
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(points[0].x, points[0].y);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(points[i + 1].x, points[i + 1].y);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(points[i + 1].x, points[i + 1].y);
|
|
}
|
|
rlEnd();
|
|
rlSetTexture(0);
|
|
}
|
|
}
|
|
|
|
// Draw a triangle strip defined by points
|
|
// NOTE: Every new vertex connects with previous two
|
|
void DrawTriangleStrip(const Vector2 *points, int pointCount, Color color)
|
|
{
|
|
if (pointCount >= 3)
|
|
{
|
|
rlBegin(RL_TRIANGLES);
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
for (int i = 2; i < pointCount; i++)
|
|
{
|
|
if ((i%2) == 0)
|
|
{
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
rlVertex2f(points[i - 2].x, points[i - 2].y);
|
|
rlVertex2f(points[i - 1].x, points[i - 1].y);
|
|
}
|
|
else
|
|
{
|
|
rlVertex2f(points[i].x, points[i].y);
|
|
rlVertex2f(points[i - 1].x, points[i - 1].y);
|
|
rlVertex2f(points[i - 2].x, points[i - 2].y);
|
|
}
|
|
}
|
|
rlEnd();
|
|
}
|
|
}
|
|
|
|
// Draw a regular polygon of n sides (Vector version)
|
|
void DrawPoly(Vector2 center, int sides, float radius, float rotation, Color color)
|
|
{
|
|
if (sides < 3) sides = 3;
|
|
float centralAngle = rotation*DEG2RAD;
|
|
float angleStep = 360.0f/(float)sides*DEG2RAD;
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
float nextAngle = centralAngle + angleStep;
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x, center.y);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
|
|
centralAngle = nextAngle;
|
|
}
|
|
rlEnd();
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x, center.y);
|
|
rlVertex2f(center.x + cosf(centralAngle + angleStep)*radius, center.y + sinf(centralAngle + angleStep)*radius);
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
|
|
centralAngle += angleStep;
|
|
}
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
// Draw a polygon outline of n sides
|
|
void DrawPolyLines(Vector2 center, int sides, float radius, float rotation, Color color)
|
|
{
|
|
if (sides < 3) sides = 3;
|
|
float centralAngle = rotation*DEG2RAD;
|
|
float angleStep = 360.0f/(float)sides*DEG2RAD;
|
|
|
|
rlBegin(RL_LINES);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
rlVertex2f(center.x + cosf(centralAngle + angleStep)*radius, center.y + sinf(centralAngle + angleStep)*radius);
|
|
|
|
centralAngle += angleStep;
|
|
}
|
|
rlEnd();
|
|
}
|
|
|
|
void DrawPolyLinesEx(Vector2 center, int sides, float radius, float rotation, float lineThick, Color color)
|
|
{
|
|
if (sides < 3) sides = 3;
|
|
float centralAngle = rotation*DEG2RAD;
|
|
float exteriorAngle = 360.0f/(float)sides*DEG2RAD;
|
|
float innerRadius = radius - (lineThick*cosf(DEG2RAD*exteriorAngle/2.0f));
|
|
|
|
#if defined(SUPPORT_QUADS_DRAW_MODE)
|
|
rlSetTexture(GetShapesTexture().id);
|
|
Rectangle shapeRect = GetShapesTextureRectangle();
|
|
|
|
rlBegin(RL_QUADS);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
float nextAngle = centralAngle + exteriorAngle;
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
|
|
rlTexCoord2f(shapeRect.x/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, (shapeRect.y + shapeRect.height)/texShapes.height);
|
|
rlVertex2f(center.x + cosf(nextAngle)*innerRadius, center.y + sinf(nextAngle)*innerRadius);
|
|
|
|
rlTexCoord2f((shapeRect.x + shapeRect.width)/texShapes.width, shapeRect.y/texShapes.height);
|
|
rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
|
|
|
|
centralAngle = nextAngle;
|
|
}
|
|
rlEnd();
|
|
rlSetTexture(0);
|
|
#else
|
|
rlBegin(RL_TRIANGLES);
|
|
for (int i = 0; i < sides; i++)
|
|
{
|
|
rlColor4ub(color.r, color.g, color.b, color.a);
|
|
float nextAngle = centralAngle + exteriorAngle;
|
|
|
|
rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
|
|
rlVertex2f(center.x + cosf(centralAngle)*radius, center.y + sinf(centralAngle)*radius);
|
|
rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
|
|
|
|
rlVertex2f(center.x + cosf(centralAngle)*innerRadius, center.y + sinf(centralAngle)*innerRadius);
|
|
rlVertex2f(center.x + cosf(nextAngle)*innerRadius, center.y + sinf(nextAngle)*innerRadius);
|
|
rlVertex2f(center.x + cosf(nextAngle)*radius, center.y + sinf(nextAngle)*radius);
|
|
|
|
centralAngle = nextAngle;
|
|
}
|
|
rlEnd();
|
|
#endif
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Definition - Splines functions
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw spline: linear, minimum 2 points
|
|
void DrawSplineLinear(const Vector2 *points, int pointCount, float thick, Color color)
|
|
{
|
|
if (pointCount < 2) return;
|
|
|
|
#if defined(SUPPORT_SPLINE_MITERS)
|
|
Vector2 prevNormal = (Vector2){-(points[1].y - points[0].y), (points[1].x - points[0].x)};
|
|
float prevLength = sqrtf(prevNormal.x*prevNormal.x + prevNormal.y*prevNormal.y);
|
|
|
|
if (prevLength > 0.0f)
|
|
{
|
|
prevNormal.x /= prevLength;
|
|
prevNormal.y /= prevLength;
|
|
}
|
|
else
|
|
{
|
|
prevNormal.x = 0.0f;
|
|
prevNormal.y = 0.0f;
|
|
}
|
|
|
|
Vector2 prevRadius = { 0.5f*thick*prevNormal.x, 0.5f*thick*prevNormal.y };
|
|
|
|
for (int i = 0; i < pointCount - 1; i++)
|
|
{
|
|
Vector2 normal = { 0 };
|
|
|
|
if (i < pointCount - 2)
|
|
{
|
|
normal = (Vector2){-(points[i + 2].y - points[i + 1].y), (points[i + 2].x - points[i + 1].x)};
|
|
float normalLength = sqrtf(normal.x*normal.x + normal.y*normal.y);
|
|
|
|
if (normalLength > 0.0f)
|
|
{
|
|
normal.x /= normalLength;
|
|
normal.y /= normalLength;
|
|
}
|
|
else
|
|
{
|
|
normal.x = 0.0f;
|
|
normal.y = 0.0f;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
normal = prevNormal;
|
|
}
|
|
|
|
Vector2 radius = { prevNormal.x + normal.x, prevNormal.y + normal.y };
|
|
float radiusLength = sqrtf(radius.x*radius.x + radius.y*radius.y);
|
|
|
|
if (radiusLength > 0.0f)
|
|
{
|
|
radius.x /= radiusLength;
|
|
radius.y /= radiusLength;
|
|
}
|
|
else
|
|
{
|
|
radius.x = 0.0f;
|
|
radius.y = 0.0f;
|
|
}
|
|
|
|
float cosTheta = radius.x*normal.x + radius.y*normal.y;
|
|
|
|
if (cosTheta != 0.0f)
|
|
{
|
|
radius.x *= (thick*0.5f/cosTheta);
|
|
radius.y *= (thick*0.5f/cosTheta);
|
|
}
|
|
else
|
|
{
|
|
radius.x = 0.0f;
|
|
radius.y = 0.0f;
|
|
}
|
|
|
|
Vector2 strip[4] = {
|
|
{ points[i].x - prevRadius.x, points[i].y - prevRadius.y },
|
|
{ points[i].x + prevRadius.x, points[i].y + prevRadius.y },
|
|
{ points[i + 1].x - radius.x, points[i + 1].y - radius.y },
|
|
{ points[i + 1].x + radius.x, points[i + 1].y + radius.y }
|
|
};
|
|
|
|
DrawTriangleStrip(strip, 4, color);
|
|
|
|
prevRadius = radius;
|
|
prevNormal = normal;
|
|
}
|
|
|
|
#else // !SUPPORT_SPLINE_MITERS
|
|
|
|
Vector2 delta = { 0 };
|
|
float length = 0.0f;
|
|
float scale = 0.0f;
|
|
|
|
for (int i = 0; i < pointCount - 1; i++)
|
|
{
|
|
delta = (Vector2){ points[i + 1].x - points[i].x, points[i + 1].y - points[i].y };
|
|
length = sqrtf(delta.x*delta.x + delta.y*delta.y);
|
|
|
|
if (length > 0) scale = thick/(2*length);
|
|
|
|
Vector2 radius = { -scale*delta.y, scale*delta.x };
|
|
Vector2 strip[4] = {
|
|
{ points[i].x - radius.x, points[i].y - radius.y },
|
|
{ points[i].x + radius.x, points[i].y + radius.y },
|
|
{ points[i + 1].x - radius.x, points[i + 1].y - radius.y },
|
|
{ points[i + 1].x + radius.x, points[i + 1].y + radius.y }
|
|
};
|
|
|
|
DrawTriangleStrip(strip, 4, color);
|
|
}
|
|
#endif
|
|
|
|
#if defined(SUPPORT_SPLINE_SEGMENT_CAPS)
|
|
// TODO: Add spline segment rounded caps at the begin/end of the spline
|
|
#endif
|
|
}
|
|
|
|
// Draw spline: B-Spline, minimum 4 points
|
|
void DrawSplineBasis(const Vector2 *points, int pointCount, float thick, Color color)
|
|
{
|
|
if (pointCount < 4) return;
|
|
|
|
float a[4] = { 0 };
|
|
float b[4] = { 0 };
|
|
float dy = 0.0f;
|
|
float dx = 0.0f;
|
|
float size = 0.0f;
|
|
|
|
Vector2 currentPoint = { 0 };
|
|
Vector2 nextPoint = { 0 };
|
|
Vector2 vertices[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
for (int i = 0; i < (pointCount - 3); i++)
|
|
{
|
|
float t = 0.0f;
|
|
Vector2 p1 = points[i], p2 = points[i + 1], p3 = points[i + 2], p4 = points[i + 3];
|
|
|
|
a[0] = (-p1.x + 3.0f*p2.x - 3.0f*p3.x + p4.x)/6.0f;
|
|
a[1] = (3.0f*p1.x - 6.0f*p2.x + 3.0f*p3.x)/6.0f;
|
|
a[2] = (-3.0f*p1.x + 3.0f*p3.x)/6.0f;
|
|
a[3] = (p1.x + 4.0f*p2.x + p3.x)/6.0f;
|
|
|
|
b[0] = (-p1.y + 3.0f*p2.y - 3.0f*p3.y + p4.y)/6.0f;
|
|
b[1] = (3.0f*p1.y - 6.0f*p2.y + 3.0f*p3.y)/6.0f;
|
|
b[2] = (-3.0f*p1.y + 3.0f*p3.y)/6.0f;
|
|
b[3] = (p1.y + 4.0f*p2.y + p3.y)/6.0f;
|
|
|
|
currentPoint.x = a[3];
|
|
currentPoint.y = b[3];
|
|
|
|
if (i == 0) DrawCircleV(currentPoint, thick/2.0f, color); // Draw init line circle-cap
|
|
|
|
if (i > 0)
|
|
{
|
|
vertices[0].x = currentPoint.x + dy*size;
|
|
vertices[0].y = currentPoint.y - dx*size;
|
|
vertices[1].x = currentPoint.x - dy*size;
|
|
vertices[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
for (int j = 1; j <= SPLINE_SEGMENT_DIVISIONS; j++)
|
|
{
|
|
t = ((float)j)/((float)SPLINE_SEGMENT_DIVISIONS);
|
|
|
|
nextPoint.x = a[3] + t*(a[2] + t*(a[1] + t*a[0]));
|
|
nextPoint.y = b[3] + t*(b[2] + t*(b[1] + t*b[0]));
|
|
|
|
dy = nextPoint.y - currentPoint.y;
|
|
dx = nextPoint.x - currentPoint.x;
|
|
size = 0.5f*thick/sqrtf(dx*dx+dy*dy);
|
|
|
|
if ((i == 0) && (j == 1))
|
|
{
|
|
vertices[0].x = currentPoint.x + dy*size;
|
|
vertices[0].y = currentPoint.y - dx*size;
|
|
vertices[1].x = currentPoint.x - dy*size;
|
|
vertices[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
vertices[2*j + 1].x = nextPoint.x - dy*size;
|
|
vertices[2*j + 1].y = nextPoint.y + dx*size;
|
|
vertices[2*j].x = nextPoint.x + dy*size;
|
|
vertices[2*j].y = nextPoint.y - dx*size;
|
|
|
|
currentPoint = nextPoint;
|
|
}
|
|
|
|
DrawTriangleStrip(vertices, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
|
|
}
|
|
|
|
// Cap circle drawing at the end of every segment
|
|
DrawCircleV(currentPoint, thick/2.0f, color);
|
|
}
|
|
|
|
// Draw spline: Catmull-Rom, minimum 4 points
|
|
void DrawSplineCatmullRom(const Vector2 *points, int pointCount, float thick, Color color)
|
|
{
|
|
if (pointCount < 4) return;
|
|
|
|
float dy = 0.0f;
|
|
float dx = 0.0f;
|
|
float size = 0.0f;
|
|
|
|
Vector2 currentPoint = points[1];
|
|
Vector2 nextPoint = { 0 };
|
|
Vector2 vertices[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
DrawCircleV(currentPoint, thick/2.0f, color); // Draw init line circle-cap
|
|
|
|
for (int i = 0; i < (pointCount - 3); i++)
|
|
{
|
|
float t = 0.0f;
|
|
Vector2 p1 = points[i], p2 = points[i + 1], p3 = points[i + 2], p4 = points[i + 3];
|
|
|
|
if (i > 0)
|
|
{
|
|
vertices[0].x = currentPoint.x + dy*size;
|
|
vertices[0].y = currentPoint.y - dx*size;
|
|
vertices[1].x = currentPoint.x - dy*size;
|
|
vertices[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
for (int j = 1; j <= SPLINE_SEGMENT_DIVISIONS; j++)
|
|
{
|
|
t = ((float)j)/((float)SPLINE_SEGMENT_DIVISIONS);
|
|
|
|
float q0 = (-1.0f*t*t*t) + (2.0f*t*t) + (-1.0f*t);
|
|
float q1 = (3.0f*t*t*t) + (-5.0f*t*t) + 2.0f;
|
|
float q2 = (-3.0f*t*t*t) + (4.0f*t*t) + t;
|
|
float q3 = t*t*t - t*t;
|
|
|
|
nextPoint.x = 0.5f*((p1.x*q0) + (p2.x*q1) + (p3.x*q2) + (p4.x*q3));
|
|
nextPoint.y = 0.5f*((p1.y*q0) + (p2.y*q1) + (p3.y*q2) + (p4.y*q3));
|
|
|
|
dy = nextPoint.y - currentPoint.y;
|
|
dx = nextPoint.x - currentPoint.x;
|
|
size = (0.5f*thick)/sqrtf(dx*dx + dy*dy);
|
|
|
|
if ((i == 0) && (j == 1))
|
|
{
|
|
vertices[0].x = currentPoint.x + dy*size;
|
|
vertices[0].y = currentPoint.y - dx*size;
|
|
vertices[1].x = currentPoint.x - dy*size;
|
|
vertices[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
vertices[2*j + 1].x = nextPoint.x - dy*size;
|
|
vertices[2*j + 1].y = nextPoint.y + dx*size;
|
|
vertices[2*j].x = nextPoint.x + dy*size;
|
|
vertices[2*j].y = nextPoint.y - dx*size;
|
|
|
|
currentPoint = nextPoint;
|
|
}
|
|
|
|
DrawTriangleStrip(vertices, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
|
|
}
|
|
|
|
// Cap circle drawing at the end of every segment
|
|
DrawCircleV(currentPoint, thick/2.0f, color);
|
|
}
|
|
|
|
// Draw spline: Quadratic Bezier, minimum 3 points (1 control point): [p1, c2, p3, c4...]
|
|
void DrawSplineBezierQuadratic(const Vector2 *points, int pointCount, float thick, Color color)
|
|
{
|
|
if (pointCount >= 3)
|
|
{
|
|
for (int i = 0; i < pointCount - 2; i += 2) DrawSplineSegmentBezierQuadratic(points[i], points[i + 1], points[i + 2], thick, color);
|
|
|
|
// Cap circle drawing at the end of every segment
|
|
//for (int i = 2; i < pointCount - 2; i += 2) DrawCircleV(points[i], thick/2.0f, color);
|
|
}
|
|
}
|
|
|
|
// Draw spline: Cubic Bezier, minimum 4 points (2 control points): [p1, c2, c3, p4, c5, c6...]
|
|
void DrawSplineBezierCubic(const Vector2 *points, int pointCount, float thick, Color color)
|
|
{
|
|
if (pointCount >= 4)
|
|
{
|
|
for (int i = 0; i < pointCount - 3; i += 3) DrawSplineSegmentBezierCubic(points[i], points[i + 1], points[i + 2], points[i + 3], thick, color);
|
|
|
|
// Cap circle drawing at the end of every segment
|
|
//for (int i = 3; i < pointCount - 3; i += 3) DrawCircleV(points[i], thick/2.0f, color);
|
|
}
|
|
}
|
|
|
|
// Draw spline segment: Linear, 2 points
|
|
void DrawSplineSegmentLinear(Vector2 p1, Vector2 p2, float thick, Color color)
|
|
{
|
|
// NOTE: For the linear spline we don't use subdivisions, just a single quad
|
|
|
|
Vector2 delta = { p2.x - p1.x, p2.y - p1.y };
|
|
float length = sqrtf(delta.x*delta.x + delta.y*delta.y);
|
|
|
|
if ((length > 0) && (thick > 0))
|
|
{
|
|
float scale = thick/(2*length);
|
|
|
|
Vector2 radius = { -scale*delta.y, scale*delta.x };
|
|
Vector2 strip[4] = {
|
|
{ p1.x - radius.x, p1.y - radius.y },
|
|
{ p1.x + radius.x, p1.y + radius.y },
|
|
{ p2.x - radius.x, p2.y - radius.y },
|
|
{ p2.x + radius.x, p2.y + radius.y }
|
|
};
|
|
|
|
DrawTriangleStrip(strip, 4, color);
|
|
}
|
|
}
|
|
|
|
// Draw spline segment: B-Spline, 4 points
|
|
void DrawSplineSegmentBasis(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float thick, Color color)
|
|
{
|
|
const float step = 1.0f/SPLINE_SEGMENT_DIVISIONS;
|
|
|
|
Vector2 currentPoint = { 0 };
|
|
Vector2 nextPoint = { 0 };
|
|
float t = 0.0f;
|
|
|
|
Vector2 points[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
float a[4] = { 0 };
|
|
float b[4] = { 0 };
|
|
|
|
a[0] = (-p1.x + 3*p2.x - 3*p3.x + p4.x)/6.0f;
|
|
a[1] = (3*p1.x - 6*p2.x + 3*p3.x)/6.0f;
|
|
a[2] = (-3*p1.x + 3*p3.x)/6.0f;
|
|
a[3] = (p1.x + 4*p2.x + p3.x)/6.0f;
|
|
|
|
b[0] = (-p1.y + 3*p2.y - 3*p3.y + p4.y)/6.0f;
|
|
b[1] = (3*p1.y - 6*p2.y + 3*p3.y)/6.0f;
|
|
b[2] = (-3*p1.y + 3*p3.y)/6.0f;
|
|
b[3] = (p1.y + 4*p2.y + p3.y)/6.0f;
|
|
|
|
currentPoint.x = a[3];
|
|
currentPoint.y = b[3];
|
|
|
|
for (int i = 0; i <= SPLINE_SEGMENT_DIVISIONS; i++)
|
|
{
|
|
t = step*(float)i;
|
|
|
|
nextPoint.x = a[3] + t*(a[2] + t*(a[1] + t*a[0]));
|
|
nextPoint.y = b[3] + t*(b[2] + t*(b[1] + t*b[0]));
|
|
|
|
float dy = nextPoint.y - currentPoint.y;
|
|
float dx = nextPoint.x - currentPoint.x;
|
|
float size = (0.5f*thick)/sqrtf(dx*dx + dy*dy);
|
|
|
|
if (i == 1)
|
|
{
|
|
points[0].x = currentPoint.x + dy*size;
|
|
points[0].y = currentPoint.y - dx*size;
|
|
points[1].x = currentPoint.x - dy*size;
|
|
points[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
points[2*i + 1].x = nextPoint.x - dy*size;
|
|
points[2*i + 1].y = nextPoint.y + dx*size;
|
|
points[2*i].x = nextPoint.x + dy*size;
|
|
points[2*i].y = nextPoint.y - dx*size;
|
|
|
|
currentPoint = nextPoint;
|
|
}
|
|
|
|
DrawTriangleStrip(points, 2*SPLINE_SEGMENT_DIVISIONS+2, color);
|
|
}
|
|
|
|
// Draw spline segment: Catmull-Rom, 4 points
|
|
void DrawSplineSegmentCatmullRom(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float thick, Color color)
|
|
{
|
|
const float step = 1.0f/SPLINE_SEGMENT_DIVISIONS;
|
|
|
|
Vector2 currentPoint = p1;
|
|
Vector2 nextPoint = { 0 };
|
|
float t = 0.0f;
|
|
|
|
Vector2 points[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
for (int i = 0; i <= SPLINE_SEGMENT_DIVISIONS; i++)
|
|
{
|
|
t = step*(float)i;
|
|
|
|
float q0 = (-1*t*t*t) + (2*t*t) + (-1*t);
|
|
float q1 = (3*t*t*t) + (-5*t*t) + 2;
|
|
float q2 = (-3*t*t*t) + (4*t*t) + t;
|
|
float q3 = t*t*t - t*t;
|
|
|
|
nextPoint.x = 0.5f*((p1.x*q0) + (p2.x*q1) + (p3.x*q2) + (p4.x*q3));
|
|
nextPoint.y = 0.5f*((p1.y*q0) + (p2.y*q1) + (p3.y*q2) + (p4.y*q3));
|
|
|
|
float dy = nextPoint.y - currentPoint.y;
|
|
float dx = nextPoint.x - currentPoint.x;
|
|
float size = (0.5f*thick)/sqrtf(dx*dx + dy*dy);
|
|
|
|
if (i == 1)
|
|
{
|
|
points[0].x = currentPoint.x + dy*size;
|
|
points[0].y = currentPoint.y - dx*size;
|
|
points[1].x = currentPoint.x - dy*size;
|
|
points[1].y = currentPoint.y + dx*size;
|
|
}
|
|
|
|
points[2*i + 1].x = nextPoint.x - dy*size;
|
|
points[2*i + 1].y = nextPoint.y + dx*size;
|
|
points[2*i].x = nextPoint.x + dy*size;
|
|
points[2*i].y = nextPoint.y - dx*size;
|
|
|
|
currentPoint = nextPoint;
|
|
}
|
|
|
|
DrawTriangleStrip(points, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
|
|
}
|
|
|
|
// Draw spline segment: Quadratic Bezier, 2 points, 1 control point
|
|
void DrawSplineSegmentBezierQuadratic(Vector2 p1, Vector2 c2, Vector2 p3, float thick, Color color)
|
|
{
|
|
const float step = 1.0f/SPLINE_SEGMENT_DIVISIONS;
|
|
|
|
Vector2 previous = p1;
|
|
Vector2 current = { 0 };
|
|
float t = 0.0f;
|
|
|
|
Vector2 points[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
for (int i = 1; i <= SPLINE_SEGMENT_DIVISIONS; i++)
|
|
{
|
|
t = step*(float)i;
|
|
|
|
float a = powf(1.0f - t, 2);
|
|
float b = 2.0f*(1.0f - t)*t;
|
|
float c = powf(t, 2);
|
|
|
|
// NOTE: The easing functions aren't suitable here because they don't take a control point
|
|
current.y = a*p1.y + b*c2.y + c*p3.y;
|
|
current.x = a*p1.x + b*c2.x + c*p3.x;
|
|
|
|
float dy = current.y - previous.y;
|
|
float dx = current.x - previous.x;
|
|
float size = 0.5f*thick/sqrtf(dx*dx+dy*dy);
|
|
|
|
if (i == 1)
|
|
{
|
|
points[0].x = previous.x + dy*size;
|
|
points[0].y = previous.y - dx*size;
|
|
points[1].x = previous.x - dy*size;
|
|
points[1].y = previous.y + dx*size;
|
|
}
|
|
|
|
points[2*i + 1].x = current.x - dy*size;
|
|
points[2*i + 1].y = current.y + dx*size;
|
|
points[2*i].x = current.x + dy*size;
|
|
points[2*i].y = current.y - dx*size;
|
|
|
|
previous = current;
|
|
}
|
|
|
|
DrawTriangleStrip(points, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
|
|
}
|
|
|
|
// Draw spline segment: Cubic Bezier, 2 points, 2 control points
|
|
void DrawSplineSegmentBezierCubic(Vector2 p1, Vector2 c2, Vector2 c3, Vector2 p4, float thick, Color color)
|
|
{
|
|
const float step = 1.0f/SPLINE_SEGMENT_DIVISIONS;
|
|
|
|
Vector2 previous = p1;
|
|
Vector2 current = { 0 };
|
|
float t = 0.0f;
|
|
|
|
Vector2 points[2*SPLINE_SEGMENT_DIVISIONS + 2] = { 0 };
|
|
|
|
for (int i = 1; i <= SPLINE_SEGMENT_DIVISIONS; i++)
|
|
{
|
|
t = step*(float)i;
|
|
|
|
float a = powf(1.0f - t, 3);
|
|
float b = 3.0f*powf(1.0f - t, 2)*t;
|
|
float c = 3.0f*(1.0f - t)*powf(t, 2);
|
|
float d = powf(t, 3);
|
|
|
|
current.y = a*p1.y + b*c2.y + c*c3.y + d*p4.y;
|
|
current.x = a*p1.x + b*c2.x + c*c3.x + d*p4.x;
|
|
|
|
float dy = current.y - previous.y;
|
|
float dx = current.x - previous.x;
|
|
float size = 0.5f*thick/sqrtf(dx*dx+dy*dy);
|
|
|
|
if (i == 1)
|
|
{
|
|
points[0].x = previous.x + dy*size;
|
|
points[0].y = previous.y - dx*size;
|
|
points[1].x = previous.x - dy*size;
|
|
points[1].y = previous.y + dx*size;
|
|
}
|
|
|
|
points[2*i + 1].x = current.x - dy*size;
|
|
points[2*i + 1].y = current.y + dx*size;
|
|
points[2*i].x = current.x + dy*size;
|
|
points[2*i].y = current.y - dx*size;
|
|
|
|
previous = current;
|
|
}
|
|
|
|
DrawTriangleStrip(points, 2*SPLINE_SEGMENT_DIVISIONS + 2, color);
|
|
}
|
|
|
|
// Get spline point for a given t [0.0f .. 1.0f], Linear
|
|
Vector2 GetSplinePointLinear(Vector2 startPos, Vector2 endPos, float t)
|
|
{
|
|
Vector2 point = { 0 };
|
|
|
|
point.x = startPos.x*(1.0f - t) + endPos.x*t;
|
|
point.y = startPos.y*(1.0f - t) + endPos.y*t;
|
|
|
|
return point;
|
|
}
|
|
|
|
// Get spline point for a given t [0.0f .. 1.0f], B-Spline
|
|
Vector2 GetSplinePointBasis(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float t)
|
|
{
|
|
Vector2 point = { 0 };
|
|
|
|
float a[4] = { 0 };
|
|
float b[4] = { 0 };
|
|
|
|
a[0] = (-p1.x + 3*p2.x - 3*p3.x + p4.x)/6.0f;
|
|
a[1] = (3*p1.x - 6*p2.x + 3*p3.x)/6.0f;
|
|
a[2] = (-3*p1.x + 3*p3.x)/6.0f;
|
|
a[3] = (p1.x + 4*p2.x + p3.x)/6.0f;
|
|
|
|
b[0] = (-p1.y + 3*p2.y - 3*p3.y + p4.y)/6.0f;
|
|
b[1] = (3*p1.y - 6*p2.y + 3*p3.y)/6.0f;
|
|
b[2] = (-3*p1.y + 3*p3.y)/6.0f;
|
|
b[3] = (p1.y + 4*p2.y + p3.y)/6.0f;
|
|
|
|
point.x = a[3] + t*(a[2] + t*(a[1] + t*a[0]));
|
|
point.y = b[3] + t*(b[2] + t*(b[1] + t*b[0]));
|
|
|
|
return point;
|
|
}
|
|
|
|
// Get spline point for a given t [0.0f .. 1.0f], Catmull-Rom
|
|
Vector2 GetSplinePointCatmullRom(Vector2 p1, Vector2 p2, Vector2 p3, Vector2 p4, float t)
|
|
{
|
|
Vector2 point = { 0 };
|
|
|
|
float q0 = (-1*t*t*t) + (2*t*t) + (-1*t);
|
|
float q1 = (3*t*t*t) + (-5*t*t) + 2;
|
|
float q2 = (-3*t*t*t) + (4*t*t) + t;
|
|
float q3 = t*t*t - t*t;
|
|
|
|
point.x = 0.5f*((p1.x*q0) + (p2.x*q1) + (p3.x*q2) + (p4.x*q3));
|
|
point.y = 0.5f*((p1.y*q0) + (p2.y*q1) + (p3.y*q2) + (p4.y*q3));
|
|
|
|
return point;
|
|
}
|
|
|
|
// Get spline point for a given t [0.0f .. 1.0f], Quadratic Bezier
|
|
Vector2 GetSplinePointBezierQuad(Vector2 startPos, Vector2 controlPos, Vector2 endPos, float t)
|
|
{
|
|
Vector2 point = { 0 };
|
|
|
|
float a = powf(1.0f - t, 2);
|
|
float b = 2.0f*(1.0f - t)*t;
|
|
float c = powf(t, 2);
|
|
|
|
point.y = a*startPos.y + b*controlPos.y + c*endPos.y;
|
|
point.x = a*startPos.x + b*controlPos.x + c*endPos.x;
|
|
|
|
return point;
|
|
}
|
|
|
|
// Get spline point for a given t [0.0f .. 1.0f], Cubic Bezier
|
|
Vector2 GetSplinePointBezierCubic(Vector2 startPos, Vector2 startControlPos, Vector2 endControlPos, Vector2 endPos, float t)
|
|
{
|
|
Vector2 point = { 0 };
|
|
|
|
float a = powf(1.0f - t, 3);
|
|
float b = 3.0f*powf(1.0f - t, 2)*t;
|
|
float c = 3.0f*(1.0f - t)*powf(t, 2);
|
|
float d = powf(t, 3);
|
|
|
|
point.y = a*startPos.y + b*startControlPos.y + c*endControlPos.y + d*endPos.y;
|
|
point.x = a*startPos.x + b*startControlPos.x + c*endControlPos.x + d*endPos.x;
|
|
|
|
return point;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module Functions Definition - Collision Detection functions
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Check if point is inside rectangle
|
|
bool CheckCollisionPointRec(Vector2 point, Rectangle rec)
|
|
{
|
|
bool collision = false;
|
|
|
|
if ((point.x >= rec.x) && (point.x < (rec.x + rec.width)) && (point.y >= rec.y) && (point.y < (rec.y + rec.height))) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if point is inside circle
|
|
bool CheckCollisionPointCircle(Vector2 point, Vector2 center, float radius)
|
|
{
|
|
bool collision = false;
|
|
|
|
float distanceSquared = (point.x - center.x)*(point.x - center.x) + (point.y - center.y)*(point.y - center.y);
|
|
|
|
if (distanceSquared <= radius*radius) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if point is inside a triangle defined by three points (p1, p2, p3)
|
|
bool CheckCollisionPointTriangle(Vector2 point, Vector2 p1, Vector2 p2, Vector2 p3)
|
|
{
|
|
bool collision = false;
|
|
|
|
float alpha = ((p2.y - p3.y)*(point.x - p3.x) + (p3.x - p2.x)*(point.y - p3.y)) /
|
|
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
|
|
|
|
float beta = ((p3.y - p1.y)*(point.x - p3.x) + (p1.x - p3.x)*(point.y - p3.y)) /
|
|
((p2.y - p3.y)*(p1.x - p3.x) + (p3.x - p2.x)*(p1.y - p3.y));
|
|
|
|
float gamma = 1.0f - alpha - beta;
|
|
|
|
if ((alpha > 0) && (beta > 0) && (gamma > 0)) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if point is within a polygon described by array of vertices
|
|
// NOTE: Based on http://jeffreythompson.org/collision-detection/poly-point.php
|
|
bool CheckCollisionPointPoly(Vector2 point, const Vector2 *points, int pointCount)
|
|
{
|
|
bool inside = false;
|
|
|
|
if (pointCount > 2)
|
|
{
|
|
for (int i = 0, j = pointCount - 1; i < pointCount; j = i++)
|
|
{
|
|
if ((points[i].y > point.y) != (points[j].y > point.y) &&
|
|
(point.x < (points[j].x - points[i].x)*(point.y - points[i].y)/(points[j].y - points[i].y) + points[i].x))
|
|
{
|
|
inside = !inside;
|
|
}
|
|
}
|
|
}
|
|
|
|
return inside;
|
|
}
|
|
|
|
// Check collision between two rectangles
|
|
bool CheckCollisionRecs(Rectangle rec1, Rectangle rec2)
|
|
{
|
|
bool collision = false;
|
|
|
|
if ((rec1.x < (rec2.x + rec2.width) && (rec1.x + rec1.width) > rec2.x) &&
|
|
(rec1.y < (rec2.y + rec2.height) && (rec1.y + rec1.height) > rec2.y)) collision = true;
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check collision between two circles
|
|
bool CheckCollisionCircles(Vector2 center1, float radius1, Vector2 center2, float radius2)
|
|
{
|
|
bool collision = false;
|
|
|
|
float dx = center2.x - center1.x; // X distance between centers
|
|
float dy = center2.y - center1.y; // Y distance between centers
|
|
|
|
float distanceSquared = dx*dx + dy*dy; // Distance between centers squared
|
|
float radiusSum = radius1 + radius2;
|
|
|
|
collision = (distanceSquared <= (radiusSum*radiusSum));
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check collision between circle and rectangle
|
|
// NOTE: Reviewed version to take into account corner limit case
|
|
bool CheckCollisionCircleRec(Vector2 center, float radius, Rectangle rec)
|
|
{
|
|
bool collision = false;
|
|
|
|
float recCenterX = rec.x + rec.width/2.0f;
|
|
float recCenterY = rec.y + rec.height/2.0f;
|
|
|
|
float dx = fabsf(center.x - recCenterX);
|
|
float dy = fabsf(center.y - recCenterY);
|
|
|
|
if (dx > (rec.width/2.0f + radius)) { return false; }
|
|
if (dy > (rec.height/2.0f + radius)) { return false; }
|
|
|
|
if (dx <= (rec.width/2.0f)) { return true; }
|
|
if (dy <= (rec.height/2.0f)) { return true; }
|
|
|
|
float cornerDistanceSq = (dx - rec.width/2.0f)*(dx - rec.width/2.0f) +
|
|
(dy - rec.height/2.0f)*(dy - rec.height/2.0f);
|
|
|
|
collision = (cornerDistanceSq <= (radius*radius));
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check the collision between two lines defined by two points each, returns collision point by reference
|
|
bool CheckCollisionLines(Vector2 startPos1, Vector2 endPos1, Vector2 startPos2, Vector2 endPos2, Vector2 *collisionPoint)
|
|
{
|
|
bool collision = false;
|
|
|
|
float div = (endPos2.y - startPos2.y)*(endPos1.x - startPos1.x) - (endPos2.x - startPos2.x)*(endPos1.y - startPos1.y);
|
|
|
|
if (fabsf(div) >= FLT_EPSILON)
|
|
{
|
|
collision = true;
|
|
|
|
float xi = ((startPos2.x - endPos2.x)*(startPos1.x*endPos1.y - startPos1.y*endPos1.x) - (startPos1.x - endPos1.x)*(startPos2.x*endPos2.y - startPos2.y*endPos2.x))/div;
|
|
float yi = ((startPos2.y - endPos2.y)*(startPos1.x*endPos1.y - startPos1.y*endPos1.x) - (startPos1.y - endPos1.y)*(startPos2.x*endPos2.y - startPos2.y*endPos2.x))/div;
|
|
|
|
if (((fabsf(startPos1.x - endPos1.x) > FLT_EPSILON) && (xi < fminf(startPos1.x, endPos1.x) || (xi > fmaxf(startPos1.x, endPos1.x)))) ||
|
|
((fabsf(startPos2.x - endPos2.x) > FLT_EPSILON) && (xi < fminf(startPos2.x, endPos2.x) || (xi > fmaxf(startPos2.x, endPos2.x)))) ||
|
|
((fabsf(startPos1.y - endPos1.y) > FLT_EPSILON) && (yi < fminf(startPos1.y, endPos1.y) || (yi > fmaxf(startPos1.y, endPos1.y)))) ||
|
|
((fabsf(startPos2.y - endPos2.y) > FLT_EPSILON) && (yi < fminf(startPos2.y, endPos2.y) || (yi > fmaxf(startPos2.y, endPos2.y))))) collision = false;
|
|
|
|
if (collision && (collisionPoint != 0))
|
|
{
|
|
collisionPoint->x = xi;
|
|
collisionPoint->y = yi;
|
|
}
|
|
}
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if point belongs to line created between two points [p1] and [p2] with defined margin in pixels [threshold]
|
|
bool CheckCollisionPointLine(Vector2 point, Vector2 p1, Vector2 p2, int threshold)
|
|
{
|
|
bool collision = false;
|
|
|
|
float dxc = point.x - p1.x;
|
|
float dyc = point.y - p1.y;
|
|
float dxl = p2.x - p1.x;
|
|
float dyl = p2.y - p1.y;
|
|
float cross = dxc*dyl - dyc*dxl;
|
|
|
|
if (fabsf(cross) < (threshold*fmaxf(fabsf(dxl), fabsf(dyl))))
|
|
{
|
|
if (fabsf(dxl) >= fabsf(dyl)) collision = (dxl > 0)? ((p1.x <= point.x) && (point.x <= p2.x)) : ((p2.x <= point.x) && (point.x <= p1.x));
|
|
else collision = (dyl > 0)? ((p1.y <= point.y) && (point.y <= p2.y)) : ((p2.y <= point.y) && (point.y <= p1.y));
|
|
}
|
|
|
|
return collision;
|
|
}
|
|
|
|
// Check if circle collides with a line created between two points [p1] and [p2]
|
|
RLAPI bool CheckCollisionCircleLine(Vector2 center, float radius, Vector2 p1, Vector2 p2)
|
|
{
|
|
float dx = p1.x - p2.x;
|
|
float dy = p1.y - p2.y;
|
|
|
|
if ((fabsf(dx) + fabsf(dy)) <= FLT_EPSILON)
|
|
{
|
|
return CheckCollisionCircles(p1, 0, center, radius);
|
|
}
|
|
|
|
float lengthSQ = ((dx*dx) + (dy*dy));
|
|
float dotProduct = (((center.x - p1.x)*(p2.x - p1.x)) + ((center.y - p1.y)*(p2.y - p1.y)))/(lengthSQ);
|
|
|
|
if (dotProduct > 1.0f) dotProduct = 1.0f;
|
|
else if (dotProduct < 0.0f) dotProduct = 0.0f;
|
|
|
|
float dx2 = (p1.x - (dotProduct*(dx))) - center.x;
|
|
float dy2 = (p1.y - (dotProduct*(dy))) - center.y;
|
|
float distanceSQ = ((dx2*dx2) + (dy2*dy2));
|
|
|
|
return (distanceSQ <= radius*radius);
|
|
}
|
|
|
|
// Get collision rectangle for two rectangles collision
|
|
Rectangle GetCollisionRec(Rectangle rec1, Rectangle rec2)
|
|
{
|
|
Rectangle overlap = { 0 };
|
|
|
|
float left = (rec1.x > rec2.x)? rec1.x : rec2.x;
|
|
float right1 = rec1.x + rec1.width;
|
|
float right2 = rec2.x + rec2.width;
|
|
float right = (right1 < right2)? right1 : right2;
|
|
float top = (rec1.y > rec2.y)? rec1.y : rec2.y;
|
|
float bottom1 = rec1.y + rec1.height;
|
|
float bottom2 = rec2.y + rec2.height;
|
|
float bottom = (bottom1 < bottom2)? bottom1 : bottom2;
|
|
|
|
if ((left < right) && (top < bottom))
|
|
{
|
|
overlap.x = left;
|
|
overlap.y = top;
|
|
overlap.width = right - left;
|
|
overlap.height = bottom - top;
|
|
}
|
|
|
|
return overlap;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------
|
|
// Module specific Functions Definition
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Cubic easing in-out
|
|
// NOTE: Used by DrawLineBezier() only
|
|
static float EaseCubicInOut(float t, float b, float c, float d)
|
|
{
|
|
float result = 0.0f;
|
|
|
|
if ((t /= 0.5f*d) < 1) result = 0.5f*c*t*t*t + b;
|
|
else
|
|
{
|
|
t -= 2;
|
|
result = 0.5f*c*(t*t*t + 2.0f) + b;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif // SUPPORT_MODULE_RSHAPES
|