question: public void reload ( ) { if ( mOriginalGeometry != null ) { if ( ! mOriginalGeometry . isValid ( ) ) { mOriginalGeometry . reload ( ) ; } copyFromGeometry3D ( mOriginalGeometry ) ; } createBuffers ( ) ; }
target:  Reload is typically called whenever the OpenGL context needs to be restored. All buffer data is re-uploaded and a new handle is obtained. It is not recommended to call this function manually.