48 lines
988 B
Plaintext
48 lines
988 B
Plaintext
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#include <raylib.h>
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#include <rdrawing.h>
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#include <math.h>
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void paintstar(Image* pImage, double x, double y, double r, double a)
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{
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int vx[5];
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int vy[5];
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for (int i = 0; i < 5; ++i)
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{
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vx[i] = (int)( -cos( PI * 4 / 5 * i + a ) * r + x );
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vy[i] = (int)( sin( PI * 4 / 5 * i + a) * r + y );
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}
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ImageFillPolygonEx(pImage,vx,vy,5,LIGHTRED);
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ImageDrawPolygonEx(pImage,vx,vy,5,2,DARKBROWN);
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}
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int main() {
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InitWindow(640,480,"rdrawing");
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SetTraceLogLevel(LOG_WARNING);
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SetTargetFPS(60);
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Image img=GenImageColor(640,480,BLANK);
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double r = 0;
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while(!WindowShouldClose()) {
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//update datas
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r += 0.02;
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if (r > PI * 2) r -= PI * 2;
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//update image (in CPU)
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ImageClearBackground(&img,BLANK);
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paintstar(&img,320,240,200,r);
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//Drawing in GPU
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Texture texture = LoadTextureFromImage(img);
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BeginDrawing();
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ClearBackground(WHITE);
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DrawTexture(texture,0,0,WHITE);
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EndDrawing();
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UnloadTexture(texture);
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}
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//Clean up
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UnloadImage(img);
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CloseWindow();
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}
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