fixed bug in engine3d (tutorials 00 and 01 are working again)
fixed bug in engine3d (tutorials 00 and 01 are working again)

robhawkes/WebViewer,robhawkes/WebViewer,Hvitnov/WebViewer,Hvitnov/WebViewer,robhawkes/WebViewer,OpenWebGlobe/WebViewer,Hvitnov/WebViewer,OpenWebGlobe/WebViewer,robhawkes/WebViewer,OpenWebGlobe/WebViewer,Hvitnov/WebViewer,OpenWebGlobe/WebViewer