forked from s_ranjbar/city_retrofit
98 lines
2.5 KiB
Python
98 lines
2.5 KiB
Python
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"""
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boolean.py
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-------------
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Do boolean operations on meshes using either Blender or OpenSCAD.
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"""
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from . import interfaces
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def difference(meshes, engine=None, **kwargs):
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"""
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Compute the boolean difference between a mesh an n other meshes.
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Parameters
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----------
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meshes : list of trimesh.Trimesh
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Meshes to be processed
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engine : str
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Which backend to use, i.e. 'blender' or 'scad'
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Returns
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----------
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difference : a - (other meshes), **kwargs for a Trimesh
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"""
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result = _engines[engine](meshes, operation='difference', **kwargs)
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return result
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def union(meshes, engine=None, **kwargs):
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"""
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Compute the boolean union between a mesh an n other meshes.
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Parameters
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----------
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meshes : list of trimesh.Trimesh
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Meshes to be processed
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engine : str
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Which backend to use, i.e. 'blender' or 'scad'
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Returns
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----------
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union : a + (other meshes), **kwargs for a Trimesh
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"""
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result = _engines[engine](meshes, operation='union', **kwargs)
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return result
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def intersection(meshes, engine=None, **kwargs):
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"""
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Compute the boolean intersection between a mesh an n other meshes.
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Parameters
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----------
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meshes : list of trimesh.Trimesh
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Meshes to be processed
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engine : str
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Which backend to use, i.e. 'blender' or 'scad'
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Returns
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----------
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intersection : **kwargs for a Trimesh object of the
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volume that is contained by all meshes
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"""
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result = _engines[engine](meshes, operation='intersection', **kwargs)
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return result
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def boolean_automatic(meshes, operation, **kwargs):
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"""
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Automatically pick an engine for booleans based on availability.
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Parameters
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--------------
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meshes : list of Trimesh
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Meshes to be booleaned
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operation : str
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Type of boolean, i.e. 'union', 'intersection', 'difference'
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Returns
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---------------
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result : trimesh.Trimesh
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Result of boolean operation
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"""
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if interfaces.blender.exists:
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result = interfaces.blender.boolean(meshes, operation, **kwargs)
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elif interfaces.scad.exists:
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result = interfaces.scad.boolean(meshes, operation, **kwargs)
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else:
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raise ValueError('No backends available for boolean operations!')
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return result
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# which backend boolean engines
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_engines = {None: boolean_automatic,
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'auto': boolean_automatic,
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'scad': interfaces.scad.boolean,
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'blender': interfaces.blender.boolean}
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