VR drag: Cannot multiply Place times "None"

[chimerax-bug-report@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.17134
ChimeraX Version: 0.8 (2018-11-26)
Description
(Describe the actions that caused this problem to occur here)

Log:
UCSF ChimeraX version: 0.8 (2018-11-26)  
How to cite UCSF ChimeraX  

> open "C:\Users\Jacobson Lab\Desktop\Aligned\session1.cxs" format session

opened ChimeraX session  

> vr on

started SteamVR rendering  

> meeting start

Meeting at vive or 169.230.21.39 port 52194  
Connection accepted from 169.230.21.70 port 54896  

> vr on

Traceback (most recent call last):  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\core\triggerset.py", line 126, in invoke  
return self._func(self._name, data)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 447, in next_frame  
self.process_controller_events()  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 476, in process_controller_events  
self.process_controller_motion()  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 497, in process_controller_motion  
hc.process_motion(self)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 1133, in process_motion  
m.drag(camera, self, previous_pose, pose)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 1178, in drag  
camera.move_scene(move)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 373, in move_scene  
hc.update_scene_position(self)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\vive\vr.py", line 1010, in update_scene_position  
self.position = camera.room_to_scene * self.room_position *
scale(camera.scene_scale)  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\core\geometry\place.py", line 117, in __mul__  
raise TypeError('Cannot multiply Place times "%s"' % str(p))  
TypeError: Cannot multiply Place times "None"  
  
Error processing trigger "new frame": Cannot multiply Place times "None":  
TypeError: Cannot multiply Place times "None"  
  
File "C:\Program Files\ChimeraX-Nov-27-2018\bin\lib\site-
packages\chimerax\core\geometry\place.py", line 117, in __mul__  
raise TypeError('Cannot multiply Place times "%s"' % str(p))  
  
See log for complete Python traceback.  
  




OpenGL version: 3.3.0 NVIDIA 391.58
OpenGL renderer: Quadro P6000/PCIe/SSE2
OpenGL vendor: NVIDIA Corporation

[Tom Goddard]

Fixed.

Error happened when one hand controller is turned on when the other one is actively moving the models.