如果迭代和函数DrawPoint(x,y)有一个int I和数字如何绘制一个圆？

Question

所以我们有一个绘制点的函数DrawPoint(x,y),我们必须绘制一些看起来像圆的点.如何创建这样for(i=0; i<numberOfIterations; i++)画圆圈？

Answer 1

// (cx, cy) is the center of the circle
// r is the circle radius
// the smaller the granularity, the better the circle will look
// to draw only numberOfIterations points, granularity 
// should be 2*pi / numberOfIterations

for(i=0; i<2*pi; i+=granularity)    
    DrawPoint(cx + r*sin(i), cy + r*cos(i));