I am implementing dragging 3D objects by mouse using picking.

For now basic implementation is ready, but I faced with one issue.

I am dragging objects relative to the camera X and Y axis. If I look at the back of the object, everything ok, but when I look backward,

axis will invert and when I will move mouse to the left, object will move to the right and vice versa.

For now I move object the following way:

objectPosition += camera.ViewMatrix.Right * -moveDistance.X;
objectPosition += camera.ViewMatrix.Up* -moveDistance.Y;

How to make that object always move in the mouse direction independent from camera position or rotation?

I dont have World matrix for camera and I think its not needed as view matrix is invrse for world matrix.

I inverted view matrix and receive the same result.

I am pretty sure it`s not identity. I think this is not a matter of View or World matrices. The case is that I want to move object in the same side as I move my cursor, but right vector of camera when I look to the objects back or forward - this is 2 different right vectors, so, I think that is causing this issue.

Issue solved.

The problem was: I multiplied relative vector from camera to delta 2 times and that was causing all my issues.