Soft lighting with solid volume rendering gives OpenGL error

[Tom Goddard]

Traceback (most recent call last):
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/ui/graphics.py", line 50, in _redraw_timer_callback
if not self.view.draw(only_if_changed=True):
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/view.py", line 148, in draw
return self._draw_if_changed()
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/view.py", line 443, in _draw_if_changed
self.draw()
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/view.py", line 154, in draw
self._draw_scene()
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/view.py", line 600, in _draw_scene
r.set_multishadow_transforms(mstf, cp, msdepth)
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/opengl.py", line 322, in set_multishadow_transforms
self.set_shadow_shader_variables(p)
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/chimera/core/graphics/opengl.py", line 340, in set_shadow_shader_variables
GL.glUniformBlockBinding(shader.program_id, bi, self._multishadow_uniform_block)
File "/Users/goddard/ucsf/chimera2/Chimera2.app/Contents/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/PyOpenGL-3.1.0-py3.4.egg/OpenGL/platform/baseplatform.py", line 402, in call
return self( *args, named )
File "errorchecker.pyx", line 53, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError (src/errorchecker.c:1218)
OpenGL.error.GLError: GLError(
err = 1281,
description = b'invalid value',
baseOperation = glUniformBlockBinding,
cArguments = (15, 4294967295, 0)
)

[Tom Goddard]

The problem is that the rendering code is trying to set the shadow matrices but SHADER_LIGHTING is off so the shader does not have the needed variables. Fixed that. But now the map appears solid white. Commenting out initial depth pass optimization of multishadows avoids the white cube. Possibly the solid rendering stack of textured planes is writing depth.

[Tom Goddard]

Fixed.

Fixed this error. Now soft lighting makes solid volumes appear as white cubes which I'll report as another bug.