32 lines
663 B
Plaintext
32 lines
663 B
Plaintext
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#include <graphics.h>
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#include <math.h>
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void paintstar(double x, double y, double r, double a)
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{
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int pt[10];
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for (int n = 0; n < 5; ++n)
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{
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pt[n*2] = (int)( -cos( PI * 4 / 5 * n + a ) * r + x );
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pt[n*2+1] = (int)( sin( PI * 4 / 5 * n + a) * r + y );
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}
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fillpoly(5, pt);
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}
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int main()
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{
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initgraph( 640, 480 );
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setcolor( RGB(0xff, 0xff, 0xff) );
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setfillcolor( RGB(0, 0, 0xff) );
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setrendermode(RENDER_MANUAL);
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double r = 0;
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for ( ; is_run(); delay_fps(60) )
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{
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r += 0.02;
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if (r > PI * 2) r -= PI * 2;
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cleardevice();
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paintstar(300, 200, 100, r);
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}
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return 0;
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}
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