像旋钮调整一样在圆形路径中移动圆圈

Question

如何在旋钮调整的圆形路径中移动圆圈？

Answer 1

xcord = centerX+(radius*cos(theta))
ycord = centerY+(radius*cos(theta))


put the circle in (xcord,ycord)

increment theta by a small radian value.......