Manual Control Rotation Point

Camera rotation point by default is using Camera.Position + Camera.LookDirection as rotation target. However, this is not accurate and not desirable if you are designing an application such as Model Viewer which sets rotation point as the center of the model.

In order to decouple the rotation points from camera, HelixToolkit viewport provides a FixedRotationPoint and FixedRotationPointEnabled property. Once set FixedRotationPointEnabled = true, the FixedRotationPoint will be used as rotation point no matter where camera is looking at.

Note: This is not applicable under CameraMode = WalkAround.