Xna绕世界轴旋转？

Question

我想使俯仰或偏航绕着世界轴而不是局部轴旋转，但是我不确定如何。

Vector2 mouse_change = new Vector2(mouse_previous.X - mouse_new.X, mouse_previous.Y - mouse_new.Y);
camera_angles *= Quaternion.CreateFromAxisAngle(new Vector3(0, 1, 0), mouse_change.X / 800f);
camera_angles *= Quaternion.CreateFromAxisAngle(new Vector3(1, 0, 0), mouse_change.Y / 800f);

更新每一帧，然后我就知道了。

view_matrix = Matrix.Invert(Matrix.CreateFromQuaternion(camera_angles) * Matrix.CreateTranslation(camera_position));
projection_matrix = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4, device.Viewport.AspectRatio, 0.2f, 500f);

Answer 1

对于简单的答案，请对“ camera_positions”执行与对“ camera_angles”相同的旋转

//Add these operations
camera_position = Vector3.Transform(camera_position, Quaternion.CreateFromAxisAngle(new Vector3(0, 1, 0), mouse_change.X / 800f));

camera_position = Vector3.Transform(camera_position, Quaternion.CreateFromAxisAngle(new Vector3(1, 0, 0), mouse_change.Y / 800f));