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get_bbox_IJK Bug #147

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get_bbox_IJK Bug #147

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14 changes: 11 additions & 3 deletions deepdrr/vol/volume.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1621,9 +1621,17 @@ def get_bbox_IJK(self) -> Optional[np.ndarray]:
np.ndarray: The bounding box as a [3, 2] array.
None, if the volume is empty.
"""
any_material = np.zeros_like(self.data, dtype=bool)
for d in self.materials.values():
any_material = np.logical_or(any_material, d)
if isinstance(self.materials, tuple):
# New materials format
material_map, label_volume = self.materials
valid_ids = list(material_map.values())
any_material = np.isin(label_volume, valid_ids) if valid_ids else np.zeros_like(self.data, dtype=bool)
else:
# Legacy materials format
any_material = np.zeros_like(self.data, dtype=bool)
for d in self.materials.values():
any_material = np.logical_or(any_material, d)

indices = np.nonzero(any_material)
if len(indices[0]) == 0:
return None
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