如何将图像旋转到光标位置？

Question

我正在尝试将图像旋转到光标位置（旋转应该是从图像的中心并旋转到光标位置）

    public void rotateImg(Graphics g)
    {
        Graphics2D g2 = (Graphics2D)g.create();

        int cursorX = MouseInfo.getPointerInfo().getLocation().x - panel.getLocationOnScreen().x; // Mouse pos
        int cursorY = MouseInfo.getPointerInfo().getLocation().y - panel.getLocationOnScreen().y;
        Point center = new Point(x+size/2,y+size/2); //Image center (x,y are the player's coordinates)
        double dx = cursorX - center.getX();
        double dy =cursorY - center.getY();

        System.out.println(Math.toDegrees(Math.atan2(dx,dy)));

        g2.rotate(Math.toRadians(Math.atan2(dy,dx)),center.x,center.y);
        g2.drawImage(playerImage,x,y,size,size, null);
    }

这个函数运行在一个线程中运行，所以它永远不会停止，我检查了光标位置是否正在更新（它们是），角度也是如此，但是当我运行它它几乎不旋转，甚至不能旋转 45 度

提前致谢！

Answer 1

试过这个：

public void rotateImg(Graphics g)
    {
        double degrees;
        Graphics2D g2 = (Graphics2D)g.create();

        Point center = new Point(x+size/2,y+size/2); //Image center (x,y are the player's coordinates)
        int cursorX = MouseInfo.getPointerInfo().getLocation().x - panel.getLocationOnScreen().x; // Mouse pos
        int cursorY = MouseInfo.getPointerInfo().getLocation().y - panel.getLocationOnScreen().y;
        double dx = cursorX - center.getX();
        double dy = cursorY - center.getY();

        degrees = Math.toDegrees(Math.atan2(dy,dx))+90;

        g2.rotate(Math.toRadians(degrees),center.x,center.y);
        g2.drawImage(playerImage,x,y,size,size, null);
    }

成功了！

如何将图像旋转到光标位置？

How to rotate an image towards cursor location?

java

swing

position

rotation

graphics2d