1.CameraModel1—– run around the focal point (object does not move, camera moves)
official demo:
https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/CameraModel1/
2.CameraModel2--movement around the camera position (the camera does not move, the object moves)
official demo:
https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/CameraModel2/