Traceback and no redraw after dragging Volume Viewer "solid" display threshold

[Elaine Meng]

The following bug report has been submitted:
Platform:        Darwin-17.7.0-x86_64-i386-64bit
ChimeraX Version: 0.9 (2019-01-22)
Description
Traceback and no redraw after dragging Volume Viewer "solid" display threshold.

Log:
> open /Users/meng/Desktop/startup.cxc

> alias nucrib car style nucleic x oval width 1.6 thick 1.6

> alias cylinders car style protein modeh tube rad 2 sides 24

> alias licorice car style protein modeh default arrows f x oval width 1 thick
1

> alias rib1 car style modeh def arrows t wid 2 thick 0.4; car style
(nucleic|strand) x rect

> alias reset view orient; view initial

executed startup.cxc  
UCSF ChimeraX version: 0.9 (2019-01-22)  
How to cite UCSF ChimeraX  

> open 4hhb format mmCIF fromDatabase pdb

4hhb title:  
The crystal structure of human deoxyhaemoglobin At 1.74 angstroms resolution
[more info...]  
  
Chain information for 4hhb #1  
---  
Chain | Description  
A C | hemoglobin (deoxy) (α chain)  
B D | hemoglobin (deoxy) (β chain)  
  
Non-standard residues in 4hhb #1  
---  
HEM — protoporphyrin IX containing Fe (HEME)  
PO4 — phosphate ion  
  
  

> molmap :hem 8

An error occurred in drawing the scene. Redrawing graphics is now stopped to
avoid a continuous stream of error messages. To restart graphics use the
command "graphics restart" after changing the settings that caused the error.  
  
Traceback (most recent call last):  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/updateloop.py", line 72, in draw_new_frame  
view.draw(check_for_changes = False)  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/view.py", line 159, in draw  
self._draw_scene(camera, drawings)  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/view.py", line 221, in _draw_scene  
draw_transparent(r, transparent_drawings)  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1373, in draw_transparent  
lambda: _draw_multiple(drawings, r, Drawing.TRANSPARENT_DRAW_PASS))  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/opengl.py", line 1043, in draw_transparent  
draw()  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1373, in <lambda>  
lambda: _draw_multiple(drawings, r, Drawing.TRANSPARENT_DRAW_PASS))  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/core/graphics/drawing.py", line 1378, in _draw_multiple  
d.draw(renderer, draw_pass)  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/map/grayscale.py", line 248, in draw  
self.reload_textures()  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/map/grayscale.py", line 421, in reload_textures  
pd.load_textures(self.color_plane)  
File
"/Users/meng/Desktop/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-
packages/chimerax/map/grayscale.py", line 489, in load_textures  
for t,(k,axis) in enumerate(pd.planes):  
NameError: name 'pd' is not defined  
  




OpenGL version: 4.1 INTEL-10.36.22
OpenGL renderer: Intel Iris Pro OpenGL Engine
OpenGL vendor: Intel Inc.