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Fix #7794: Only slice layerset mesh when material layer set usage exists

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Without a usage, orientation is undefined so slicing should be skipped.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-03-14 13:25:14 +11:00
parent cf1552e79e
commit 473d689cf2
1 changed files with 1 additions and 10 deletions
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src/bonsai/bonsai/tool/loader.py
+1 -10
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@@ -1070,11 +1070,6 @@ class Loader(bonsai.core.tool.Loader):
layer_set = material.ForLayerSet layer_set = material.ForLayerSet
offset = usage.OffsetFromReferenceLine * cls.unit_scale offset = usage.OffsetFromReferenceLine * cls.unit_scale
sense_factor = 1 if usage.DirectionSense == "POSITIVE" else -1 sense_factor = 1 if usage.DirectionSense == "POSITIVE" else -1
elif material.is_a("IfcMaterialLayerSet"):
usage = None
layer_set = material
offset = 0
sense_factor = 1
else: else:
return mesh return mesh
if len(layer_set.MaterialLayers) == 1: if len(layer_set.MaterialLayers) == 1:
@@ -1082,11 +1077,7 @@ class Loader(bonsai.core.tool.Loader):
bm = bmesh.new() bm = bmesh.new()
bm.from_mesh(mesh) bm.from_mesh(mesh)
prev_co = None prev_co = None
if not usage: if usage.LayerSetDirection == "AXIS2":
sense_factor = 1 # Assume the extrusion vector points in the direction sense
no = cls.get_extrusion_vector(element).normalized()
co = Vector((0.0, 0.0, offset))
elif usage.LayerSetDirection == "AXIS2":
co = Vector((0.0, offset, 0.0)) co = Vector((0.0, offset, 0.0))
no = cls.get_extrusion_vector(element).normalized() no = cls.get_extrusion_vector(element).normalized()
no = no.cross(Vector([1.0, 0.0, 0.0])) no = no.cross(Vector([1.0, 0.0, 0.0]))