Draw a Star using Quartz 2D
1 #define PSIZE 16 // size of the pattern cell 2 3 static void MyDrawStencilStar (void *info, CGContextRef myContext) 4 { 5 int k; 6 double r, theta; 7 8 r = 0.8 * PSIZE / 2; 9 theta = 2 * M_PI * (2.0 / 5.0); // 144 degrees10 11 CGContextTranslateCTM (myContext, PSIZE/2, PSIZE/2);12 13 CGContextMoveToPoint(myContext, 0, r);14 for (k = 1; k < 5; k++) {15 CGContextAddLineToPoint (myContext,16 r * sin(k * theta),17 r * cos(k * theta));18 }19 CGContextClosePath(myContext);20 CGContextFillPath(myContext);21 }TAG:
