Bug in Support Generation for large and complex stl parts

[Vipul-M-Rawal]

Hi, I am facing issues generating block supports for the given parts. I am getting almost the same problems for many parts. To solve the issues I made some changes in the parameters also, but still the issue persists.
I am attaching the stl file and the code below:

code :
Code.txt

I am getting the given errors:

ERROR:root:Support generation failed: Input must be >= 1-d.

WARNING: Traceback (most recent call last):
File "c:\Users\vipul.k\Music\VolumeGen\Volume.py", line 98, in
supportBlockRegions = supportGenerator.identifySupportRegions(myPart, OVERHANG_ANGLE, True)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\gridBlockSupport.py", line 1936, in identifySupportRegions
supportBlocks = super().identifySupportRegions(part, overhangAngle, findSelfIntersectingSupport)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\support.py", line 851, in identifySupportRegions
heightMap, heightMapUpper, heightMapLower = self._identifySelfIntersectionHeightMap(subregion, offsetPoly, cutMeshUpper, bbox)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\support.py", line 624, in _identifySelfIntersectionHeightMap
lowerImg = render.projectHeightMap(cutMesh, self.rayProjectionResolution, True, bboxCpy)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\render.py", line 188, in projectHeightMap
c.show(visible=True)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\canvas.py", line 435, in show
self._backend._vispy_set_visible(visible)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 465, in _vispy_set_visible
self.showNormal()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 626, in event
out = super(QtBaseCanvasBackend, self).event(ev)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 626, in event
out = super(QtBaseCanvasBackend, self).event(ev)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 928, in paintGL
self._vispy_canvas.events.draw(region=None)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 453, in call
self._invoke_callback(cb, event)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 471, in _invoke_callback
_handle_exception(self.ignore_callback_errors,
<< caught exception here: >>
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 469, in _invoke_callback
cb(event)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\render.py", line 175, in on_draw
self.program.draw('triangles', self.filled_buf)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\program.py", line 543, in draw
canvas.context.flush_commands()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\context.py", line 172, in flush_commands
self.glir.flush(self.shared.parser)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 584, in flush
self._shared.flush(parser)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 506, in flush
parser.parse(self._filter(self.clear(), parser))
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 824, in parse
self._parse(command)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 800, in _parse
ob.set_framebuffer(*args)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 1758, in set_framebuffer
self._validate()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 1823, in _validate
raise RuntimeError(_bad_map.get(res, 'Unknown framebuffer error: %r.'
RuntimeError: Target not equal to GL_FRAMEBUFFER
WARNING:vispy:Traceback (most recent call last):
File "c:\Users\vipul.k\Music\VolumeGen\Volume.py", line 98, in
supportBlockRegions = supportGenerator.identifySupportRegions(myPart, OVERHANG_ANGLE, True)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\gridBlockSupport.py", line 1936, in identifySupportRegions
supportBlocks = super().identifySupportRegions(part, overhangAngle, findSelfIntersectingSupport)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\support.py", line 851, in identifySupportRegions
heightMap, heightMapUpper, heightMapLower = self._identifySelfIntersectionHeightMap(subregion, offsetPoly, cutMeshUpper, bbox)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\support.py", line 624, in _identifySelfIntersectionHeightMap
lowerImg = render.projectHeightMap(cutMesh, self.rayProjectionResolution, True, bboxCpy)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\render.py", line 188, in projectHeightMap
c.show(visible=True)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\canvas.py", line 435, in show
self._backend._vispy_set_visible(visible)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 465, in _vispy_set_visible
self.showNormal()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 626, in event
out = super(QtBaseCanvasBackend, self).event(ev)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 626, in event
out = super(QtBaseCanvasBackend, self).event(ev)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\app\backends_qt.py", line 928, in paintGL
self._vispy_canvas.events.draw(region=None)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 453, in call
self._invoke_callback(cb, event)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 471, in _invoke_callback
_handle_exception(self.ignore_callback_errors,
<< caught exception here: >>
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\util\event.py", line 469, in _invoke_callback
cb(event)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyslm\support\render.py", line 175, in on_draw
self.program.draw('triangles', self.filled_buf)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\program.py", line 543, in draw
canvas.context.flush_commands()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\context.py", line 172, in flush_commands
self.glir.flush(self.shared.parser)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 584, in flush
self._shared.flush(parser)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 506, in flush
parser.parse(self._filter(self.clear(), parser))
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 824, in parse
self._parse(command)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 800, in _parse
ob.set_framebuffer(*args)
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 1758, in set_framebuffer
self._validate()
File "C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\vispy\gloo\glir.py", line 1823, in _validate
raise RuntimeError(_bad_map.get(res, 'Unknown framebuffer error: %r.'
RuntimeError: Target not equal to GL_FRAMEBUFFER
ERROR: Invoking <bound method Canvas.on_draw of <Canvas (PyQt5) at 0x22ccc1ee4e0>> for DrawEvent
ERROR:vispy:Invoking <bound method Canvas.on_draw of <Canvas (PyQt5) at 0x22ccc1ee4e0>> for DrawEvent

INFO:root:Time taken for support geometry creation: 46.22 seconds
C:\Users\vipul.k\AppData\Roaming\Python\Python312\site-packages\pyglet\libs\win32_init_.py:318: UserWarning: Could not set COM MTA mode. Unexpected behavior may occur.
warnings.warn("Could not set COM MTA mode. Unexpected behavior may occur.")

Structure-pack_200 mm.zip

[drlukeparry]

the error appears related to the vispy module, which is using the pyglet backend, which I have observed to create some problems in the past depending on the system/platform used. Additionally, the functionality depends on having reasonably modern openGL graphics drivers that support floating-point depth framebuffers, otherwise the raytracing approach method breaks down when attempting to create supports. I imagine under certain virtualisation / cloud platforms this could be problematic.

I would suggest to install PyQt5 / PyQt6 and set the corresponding backend for vispy to use this and see if this fixes the problem you are encountering.