You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
247 lines
10 KiB
247 lines
10 KiB
/*******************************************************************************************
|
|
*
|
|
* raylib [shapes] example - splines drawing
|
|
*
|
|
* Example originally created with raylib 5.0, last time updated with raylib 5.0
|
|
*
|
|
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
|
|
* BSD-like license that allows static linking with closed source software
|
|
*
|
|
* Copyright (c) 2023 Ramon Santamaria (@raysan5)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include "raylib.h"
|
|
|
|
#define RAYGUI_IMPLEMENTATION
|
|
#include "raygui.h" // Required for UI controls
|
|
|
|
#include <stdlib.h> // Required for: NULL
|
|
|
|
#define MAX_SPLINE_POINTS 32
|
|
|
|
// Cubic Bezier spline control points
|
|
// NOTE: Every segment has two control points
|
|
typedef struct {
|
|
Vector2 start;
|
|
Vector2 end;
|
|
} ControlPoint;
|
|
|
|
// Spline types
|
|
typedef enum {
|
|
SPLINE_LINEAR = 0, // Linear
|
|
SPLINE_BASIS, // B-Spline
|
|
SPLINE_CATMULLROM, // Catmull-Rom
|
|
SPLINE_BEZIER // Cubic Bezier
|
|
} SplineType;
|
|
|
|
//------------------------------------------------------------------------------------
|
|
// Program main entry point
|
|
//------------------------------------------------------------------------------------
|
|
int main(void)
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
const int screenWidth = 800;
|
|
const int screenHeight = 450;
|
|
|
|
SetConfigFlags(FLAG_MSAA_4X_HINT);
|
|
InitWindow(screenWidth, screenHeight, "raylib [shapes] example - splines drawing");
|
|
|
|
Vector2 points[MAX_SPLINE_POINTS] = {
|
|
{ 50.0f, 400.0f },
|
|
{ 160.0f, 220.0f },
|
|
{ 340.0f, 380.0f },
|
|
{ 520.0f, 60.0f },
|
|
{ 710.0f, 260.0f },
|
|
};
|
|
|
|
int pointCount = 5;
|
|
int selectedPoint = -1;
|
|
int focusedPoint = -1;
|
|
Vector2 *selectedControlPoint = NULL;
|
|
Vector2 *focusedControlPoint = NULL;
|
|
|
|
// Cubic Bezier control points initialization
|
|
ControlPoint control[MAX_SPLINE_POINTS] = { 0 };
|
|
for (int i = 0; i < pointCount - 1; i++)
|
|
{
|
|
control[i].start = (Vector2){ points[i].x + 50, points[i].y };
|
|
control[i].end = (Vector2){ points[i + 1].x - 50, points[i + 1].y };
|
|
}
|
|
|
|
// Spline config variables
|
|
float splineThickness = 8.0f;
|
|
int splineTypeActive = SPLINE_LINEAR; // 0-Linear, 1-BSpline, 2-CatmullRom, 3-Bezier
|
|
bool splineTypeEditMode = false;
|
|
bool splineHelpersActive = true;
|
|
|
|
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose()) // Detect window close button or ESC key
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
// Spline points creation logic (at the end of spline)
|
|
if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON) && (pointCount < MAX_SPLINE_POINTS))
|
|
{
|
|
points[pointCount] = GetMousePosition();
|
|
pointCount++;
|
|
}
|
|
|
|
// Spline point focus and selection logic
|
|
for (int i = 0; i < pointCount; i++)
|
|
{
|
|
if (CheckCollisionPointCircle(GetMousePosition(), points[i], 8.0f))
|
|
{
|
|
focusedPoint = i;
|
|
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) selectedPoint = i;
|
|
break;
|
|
}
|
|
else focusedPoint = -1;
|
|
}
|
|
|
|
// Spline point movement logic
|
|
if (selectedPoint >= 0)
|
|
{
|
|
points[selectedPoint] = GetMousePosition();
|
|
if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) selectedPoint = -1;
|
|
}
|
|
|
|
// Cubic Bezier spline control points logic
|
|
if ((splineTypeActive == SPLINE_BEZIER) && (focusedPoint == -1))
|
|
{
|
|
// Spline control point focus and selection logic
|
|
for (int i = 0; i < pointCount; i++)
|
|
{
|
|
if (CheckCollisionPointCircle(GetMousePosition(), control[i].start, 6.0f))
|
|
{
|
|
focusedControlPoint = &control[i].start;
|
|
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) selectedControlPoint = &control[i].start;
|
|
break;
|
|
}
|
|
else if (CheckCollisionPointCircle(GetMousePosition(), control[i].end, 6.0f))
|
|
{
|
|
focusedControlPoint = &control[i].end;
|
|
if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) selectedControlPoint = &control[i].end;
|
|
break;
|
|
}
|
|
else focusedControlPoint = NULL;
|
|
}
|
|
|
|
// Spline control point movement logic
|
|
if (selectedControlPoint != NULL)
|
|
{
|
|
*selectedControlPoint = GetMousePosition();
|
|
if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) selectedControlPoint = NULL;
|
|
}
|
|
}
|
|
|
|
// Spline selection logic
|
|
if (IsKeyPressed(KEY_ONE)) splineTypeActive = 0;
|
|
else if (IsKeyPressed(KEY_TWO)) splineTypeActive = 1;
|
|
else if (IsKeyPressed(KEY_THREE)) splineTypeActive = 2;
|
|
else if (IsKeyPressed(KEY_FOUR)) splineTypeActive = 3;
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
|
|
ClearBackground(RAYWHITE);
|
|
|
|
if (splineTypeActive == SPLINE_LINEAR)
|
|
{
|
|
// Draw spline: linear
|
|
DrawSplineLinear(points, pointCount, splineThickness, RED);
|
|
}
|
|
else if (splineTypeActive == SPLINE_BASIS)
|
|
{
|
|
// Draw spline: basis
|
|
DrawSplineBasis(points, pointCount, splineThickness, RED); // Provide connected points array
|
|
|
|
/*
|
|
for (int i = 0; i < (pointCount - 3); i++)
|
|
{
|
|
// Drawing individual segments, not considering thickness connection compensation
|
|
DrawSplineSegmentBasis(points[i], points[i + 1], points[i + 2], points[i + 3], splineThickness, MAROON);
|
|
}
|
|
*/
|
|
}
|
|
else if (splineTypeActive == SPLINE_CATMULLROM)
|
|
{
|
|
// Draw spline: catmull-rom
|
|
DrawSplineCatmullRom(points, pointCount, splineThickness, RED); // Provide connected points array
|
|
|
|
/*
|
|
for (int i = 0; i < (pointCount - 3); i++)
|
|
{
|
|
// Drawing individual segments, not considering thickness connection compensation
|
|
DrawSplineSegmentCatmullRom(points[i], points[i + 1], points[i + 2], points[i + 3], splineThickness, MAROON);
|
|
}
|
|
*/
|
|
}
|
|
else if (splineTypeActive == SPLINE_BEZIER)
|
|
{
|
|
// Draw spline: cubic-bezier (with control points)
|
|
for (int i = 0; i < pointCount - 1; i++)
|
|
{
|
|
// Drawing individual segments, not considering thickness connection compensation
|
|
DrawSplineSegmentBezierCubic(points[i], control[i].start, control[i].end, points[i + 1], splineThickness, RED);
|
|
|
|
// Every cubic bezier point should have two control points
|
|
DrawCircleV(control[i].start, 6, GOLD);
|
|
DrawCircleV(control[i].end, 6, GOLD);
|
|
if (focusedControlPoint == &control[i].start) DrawCircleV(control[i].start, 8, GREEN);
|
|
else if (focusedControlPoint == &control[i].end) DrawCircleV(control[i].end, 8, GREEN);
|
|
DrawLineEx(points[i], control[i].start, 1.0f, LIGHTGRAY);
|
|
DrawLineEx(points[i + 1], control[i].end, 1.0f, LIGHTGRAY);
|
|
|
|
// Draw spline control lines
|
|
DrawLineV(points[i], control[i].start, GRAY);
|
|
//DrawLineV(control[i].start, control[i].end, LIGHTGRAY);
|
|
DrawLineV(control[i].end, points[i + 1], GRAY);
|
|
}
|
|
}
|
|
|
|
if (splineHelpersActive)
|
|
{
|
|
// Draw spline point helpers
|
|
for (int i = 0; i < pointCount; i++)
|
|
{
|
|
DrawCircleLinesV(points[i], (focusedPoint == i)? 12.0f : 8.0f, (focusedPoint == i)? BLUE: DARKBLUE);
|
|
if ((splineTypeActive != SPLINE_LINEAR) &&
|
|
(splineTypeActive != SPLINE_BEZIER) &&
|
|
(i < pointCount - 1)) DrawLineV(points[i], points[i + 1], GRAY);
|
|
|
|
DrawText(TextFormat("[%.0f, %.0f]", points[i].x, points[i].y), points[i].x, points[i].y + 10, 10, BLACK);
|
|
}
|
|
}
|
|
|
|
// Check all possible UI states that require controls lock
|
|
if (splineTypeEditMode) GuiLock();
|
|
|
|
// Draw spline config
|
|
GuiLabel((Rectangle){ 12, 62, 140, 24 }, TextFormat("Spline thickness: %i", (int)splineThickness));
|
|
GuiSliderBar((Rectangle){ 12, 60 + 24, 140, 16 }, NULL, NULL, &splineThickness, 1.0f, 40.0f);
|
|
|
|
GuiCheckBox((Rectangle){ 12, 110, 20, 20 }, "Show point helpers", &splineHelpersActive);
|
|
|
|
GuiUnlock();
|
|
|
|
GuiLabel((Rectangle){ 12, 10, 140, 24 }, "Spline type:");
|
|
if (GuiDropdownBox((Rectangle){ 12, 8 + 24, 140, 28 }, "LINEAR;BSPLINE;CATMULLROM;BEZIER", &splineTypeActive, splineTypeEditMode)) splineTypeEditMode = !splineTypeEditMode;
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|