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/******************************************************************************************* |
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* |
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* raylib [shapes] example - triangle strip |
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* |
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* Example complexity rating: [★★☆☆] 2/4 |
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* |
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* Example originally created with raylib 5.6-dev, last time updated with raylib 5.6-dev |
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* |
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* Example contributed by Jopestpe (@jopestpe) |
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* |
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, |
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* BSD-like license that allows static linking with closed source software |
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* |
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* Copyright (c) 2018-2025 Jopestpe (@jopestpe) |
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* |
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********************************************************************************************/ |
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#include "raylib.h" |
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#include <math.h> |
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#define RAYGUI_IMPLEMENTATION |
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#include "raygui.h" // Required for GUI controls |
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//---------------------------------------------------------------------------------- |
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// Module Functions Declaration |
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//---------------------------------------------------------------------------------- |
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static Vector2 CalculatePoint(Vector2 start, float angle, float length); |
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static void DrawTriangleCustom(Vector2 point1, Vector2 point2, Vector2 point3, float angle, bool outline); |
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//------------------------------------------------------------------------------------ |
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// Program main entry point |
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//------------------------------------------------------------------------------------ |
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int main(void) |
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{ |
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// Initialization |
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//-------------------------------------------------------------------------------------- |
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const int screenWidth = 800; |
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const int screenHeight = 450; |
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InitWindow(screenWidth, screenHeight, "raylib [shapes] example - triangle strip"); |
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Vector2 points[120] = { 0 }; |
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Vector2 center = { (screenWidth/2.0f) - 125.f, screenHeight/2.0f }; |
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float segments = 6.0f; |
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float insideRadius = 100.0f; |
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float outsideRadius = 150.0f; |
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bool outline = true; |
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second |
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//-------------------------------------------------------------------------------------- |
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// Main game loop |
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while (!WindowShouldClose()) // Detect window close button or ESC key |
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{ |
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// Update |
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//---------------------------------------------------------------------------------- |
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int pointCount = (int)(segments); |
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float angleStep = (360.0f/pointCount)*DEG2RAD; |
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for (int i = 0, i2 = 0; i < pointCount; i++, i2 += 2) |
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{ |
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points[i2] = CalculatePoint(center, i*angleStep, insideRadius); |
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points[i2 + 1] = CalculatePoint(center, i*angleStep + angleStep/2.0f, outsideRadius); |
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} |
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points[pointCount*2] = points[0]; |
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points[pointCount*2 + 1] = points[1]; |
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// Draw |
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//---------------------------------------------------------------------------------- |
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BeginDrawing(); |
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ClearBackground(RAYWHITE); |
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for (int i = 0, i2 = 0; i < pointCount; i++, i2 += 2) |
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{ |
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DrawTriangleCustom(points[i2], points[i2 + 1], points[i2 + 2], i*angleStep, outline); |
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DrawTriangleCustom(points[i2 + 2], points[i2 + 1], points[i2 + 3], i*angleStep + (angleStep/2), outline); |
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} |
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DrawLine(580, 0, 580, GetScreenHeight(), (Color){ 218, 218, 218, 255 }); |
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DrawRectangle(580, 0, GetScreenWidth(), GetScreenHeight(), (Color){ 232, 232, 232, 255 }); |
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// Draw GUI controls |
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//------------------------------------------------------------------------------ |
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GuiSliderBar((Rectangle){ 640, 40, 120, 20}, "Segments", TextFormat("%.0f", segments), &segments, 6.0f, 60.f); |
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GuiCheckBox((Rectangle){ 640, 70, 20, 20 }, "Outline", &outline); |
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//------------------------------------------------------------------------------ |
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DrawFPS(10, 10); |
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EndDrawing(); |
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//---------------------------------------------------------------------------------- |
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} |
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// De-Initialization |
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//-------------------------------------------------------------------------------------- |
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CloseWindow(); // Close window and OpenGL context |
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//-------------------------------------------------------------------------------------- |
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return 0; |
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} |
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static Vector2 CalculatePoint(Vector2 start, float angle, float radius) |
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{ |
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return (Vector2){ start.x + cosf(angle)*radius, start.y + sinf(angle)*radius }; |
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} |
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static void DrawTriangleCustom(Vector2 point1, Vector2 point2, Vector2 point3, float angle, bool outline) |
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{ |
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Color color = ColorFromHSV(angle*RAD2DEG, 1.0f, 1.0f); |
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DrawTriangle(point3, point2, point1, color); |
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if (outline) DrawTriangleLines(point1, point2, point3, BLACK); |
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} |