66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
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import os
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import platform
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from .generic import MeshScript
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from ..constants import log
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from distutils.spawn import find_executable
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_search_path = os.environ['PATH']
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if platform.system() == 'Windows':
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# split existing path by delimiter
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_search_path = [i for i in _search_path.split(';') if len(i) > 0]
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_search_path.append(r'C:\Program Files')
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_search_path.append(r'C:\Program Files (x86)')
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_search_path = ';'.join(_search_path)
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log.debug('searching for vhacd in: %s', _search_path)
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_vhacd_executable = None
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for _name in ['vhacd', 'testVHACD']:
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_vhacd_executable = find_executable(_name, path=_search_path)
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if _vhacd_executable is not None:
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break
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exists = _vhacd_executable is not None
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def convex_decomposition(mesh, debug=False, **kwargs):
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"""
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Run VHACD to generate an approximate convex decomposition
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of a single mesh.
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Parameters
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--------------
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mesh : trimesh.Trimesh
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Mesh to be decomposed into convex components
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Returns
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------------
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meshes : (n,) trimesh.Trimesh
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List of convex meshes
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"""
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if not exists:
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raise ValueError('No vhacd available!')
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argstring = ' --input $MESH_0 --output $MESH_POST --log $SCRIPT'
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# pass through extra arguments from the input dictionary
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for key, value in kwargs.items():
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argstring += ' --{} {}'.format(str(key),
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str(value))
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with MeshScript(meshes=[mesh],
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script='',
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exchange='obj',
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group_material=False,
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split_object=True,
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debug=debug) as vhacd:
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result = vhacd.run(_vhacd_executable + argstring)
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# if we got a scene back return a list of meshes
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if hasattr(result, 'geometry') and isinstance(result.geometry, dict):
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return list(result.geometry.values())
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return result
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