3d 为什么我的相机不能跟踪它的目标？（XNA 4.0）

这是我的代码，它让对象用鼠标移动，但它不会使屏幕（相机）随之移动。我不明白为什么它会这样做。有人知道为什么吗

void UpdateCamera()
    {
        currentmousestate = Mouse.GetState();
        // Calculate the camera's current position.
        Vector3 cameraPosition = avatarPosition;

        Matrix rotationMatrix = Matrix.CreateRotationY(avatarYaw);

        // Create a vector pointing the direction the camera is facing.

        // Compare the original mouse position with the new one,
        // and divide that by a float of -80.

        cameraReference = new Vector3((currentmousestate.X - originalstate.X)/-80f, (currentmousestate.Y - originalstate.Y)/-80f, 1);
        avatarYaw = (float)(currentmousestate.X - originalstate.X)/-160f;

        Vector3 transformedReference = Vector3.Transform(cameraReference, rotationMatrix);

        // Calculate the position the camera is looking at.
        Vector3 cameraLookat = cameraPosition + transformedReference;

        // Set up the view matrix and projection matrix.
        view = Matrix.CreateLookAt(cameraPosition, cameraLookat, new Vector3(0.0f, 1.0f, 0.0f));

        Viewport viewport = graphics.GraphicsDevice.Viewport;
        float aspectRatio = (float)viewport.Width / (float)viewport.Height;

        proj = Matrix.CreatePerspectiveFieldOfView(viewAngle, aspectRatio, nearClip, farClip);
        //originalstate = currentmousestate;

    }

---

您应该使用调试器来监视变量获取的值。。。虚拟位置值是否在变化

我不明白你拿老鼠做什么。。。你应该在世界坐标中获得鼠标射线，以便进行有意义的计算。。。您可以使用Viewport.UnProject获取它

我想你想实现一个arcball鼠标摄像头。。。但是，如果您要查找“xna arcball”，则有几个示例