如何找到围绕另一个圆周旋转的圆周长坐标？

public static void drawSpiral(Display panel) {
    int centerX = panel.getWidth() / 2;
    int centerY = panel.getHeight() / 2;

    double degAng = 270;
    double radius = 150;
    double x, y, radAng;
    while ( true ) {

        radAng = ( degAng * Math.PI ) / 180;
        x = centerX + radius * Math.cos ( radAng );
        y = centerY + radius * Math.sin ( radAng );

        panel.drawNextPoint ( (int) x, (int) y );
        degAng += 0.45;
    }
}
public static void drawSpiral(Display panel) {