115 lines
No EOL
4.6 KiB
C
115 lines
No EOL
4.6 KiB
C
/*******************************************************************************************
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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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} |