椭圆轨迹计算方法

椭圆轨迹计算方法，java 代码 ：

int centerX = 300;//中心点x
  int centerY = 300;//中心点y
  int width = 200;//椭圆宽
  int height = 100;//椭圆高
  int radiusOuterX = width/2;
  int radiusOuterY = height/2;
  int num = 9;
  for(int i = 0; i < num; i++){
   double angleOuter = (2*Math.PI/num)*i;
   int x = (int)(radiusOuterX*Math.sin(angleOuter))  ;
   int y = (int)(radiusOuterY*Math.cos(angleOuter)) ;
   x += centerX;
   y += centerY;
   System.out.println(x +":" + y);
  }