java - 在 Java 3d 中旋转对象

Question

我尝试在Java3D中根据鼠标的移动来旋转立方体。无论立方体的旋转如何，我希望当我向上拖动光标时，立方体以相同的方向旋转。这适用于所有可能的运动。

我该如何继续？我猜它必须放在相机坐标中......

这是我的功能:

public void objectRotate(TransformGroup objectInInteraction, double dh,
        double dp, double dr) {

    Transform3D oldT3D = new Transform3D();
    objectInInteraction.getTransform(oldT3D);       

    Transform3D tx = new Transform3D();
    Transform3D ty = new Transform3D();
    Transform3D tz = new Transform3D();

    Transform3D tc = new Transform3D();
    //camera.getTransform(tc);

    double x = 0, y = 0, z = 0;
    x = Math.PI * dh / 180;
    y = Math.PI * dp / 180;
    z = Math.PI * dr / 180;

    tx.rotX(x);
    tc.mul(tx);

    ty.rotY(y);
    tc.mul(ty);

    tz.rotZ(z);     
    tc.mul(tz);

    oldT3D.mul(tc);


    objectInInteraction.setTransform(oldT3D);
}

dh是左右移动，dp，上下

谢谢!

Answer 1

这对我有用......

public void objectRotate(TransformGroup objectInInteraction, double dh,
    double dp, double dr)
{

    // Transform3D oldT3D = new Transform3D();
    // objectInInteraction.getTransform(oldT3D);       

    Transform3D tx = new Transform3D();
    Transform3D ty = new Transform3D();
    Transform3D tz = new Transform3D();

    Transform3D tc = new Transform3D();
    //camera.getTransform(tc);

    double x = 0, y = 0, z = 0;
    x = Math.PI * dh / 180;
    y = Math.PI * dp / 180;
    z = Math.PI * dr / 180;

    tx.rotX(x);
    tc.mul(tx);

    ty.rotY(y);
    tc.mul(ty);

    tz.rotZ(z);     
    tc.mul(tz);

    // oldT3D.mul(tc);

    objectInInteraction.setTransform(tc);
}

;-)