使位图“轨道”成为一个点

Question

I am trying to make a "wheel of buttons" - I have a custom "Button" object that uses a Rect for it's position/size.

I can get one to rotate by doing this:

Button1.Rectangle.left = (int) (Vertex.x + (radius * Math.sin(Math.toRadians(Degree))));
Button1.Rectangle.top =  (int) (Vertex.y + (radius * Math.cos(Math.toRadians(Degree))));
Button1.Rectangle.right = Button1.Rectangle.left + ButtonSize;
Button1.Rectangle.bottom = Button1.Rectangle.top + ButtonSize;

    Degree += 1;

Unfortunately, this only works for one because they then all line up on eachother...how do I incorporate an "offset", or increment instead of assign the location

I've tried:

 //Using self position as vertex
    Button1.Rectangle.left = (int) (Button1.Rectangle.left + (radius * Math.sin(Math.toRadians(Degree))));
    Button1.Rectangle.top =  (int) (Button1.Rectangle.top + (radius * Math.cos(Math.toRadians(Degree))));

and

// using +=
 Button1.Rectangle.left += (int) (Vertex.x + (radius * Math.sin(Math.toRadians(Degree))));
Button1.Rectangle.top +=  (int) (Vertex.y + (radius * Math.cos(Math.toRadians(Degree))));

I know it must be something fairly easy, I'm just missing it...

EDIT:

Fixed it by making a"

int Degree1 = 0;
int Degree2 = 90;
int Degree3 = 180;
etc.

and incrementing them:

Degree1 += 1;
Degree2 += 1;
Degree3 += 1;

Answer 1

存储要旋转的原点，每次去计算它的位置时，都以原点而不是当前点为基准进行计算。