Intersection Error

Description

025-11-18 14:17:51.099 ( 249.246s) [ A0BCB1AFA88E3F7]vtkIntersectionPolyData:1583 WARN| vtkIntersectionPolyDataFilter (000001F58AB605B0): No cell with correct orientation found
2025-11-18 14:17:51.208 ( 249.356s) [ A0BCB1AFA88E3F7] vtkExecutive.cxx:730 ERR| vtkCompositeDataPipeline (000001F58D9ABB70): Algorithm vtkIntersectionPolyDataFilter (000001F58AB605B0) returned failure for request: vtkInformation (000001F58AD53B40)
Debug: Off
Modified Time: 3459233
Reference Count: 1
Registered Events: (none)
Request: REQUEST_DATA
FORWARD_DIRECTION: 0
ALGORITHM_AFTER_FORWARD: 1
FROM_OUTPUT_PORT: 0

ERROR:root:Algorithm vtkIntersectionPolyDataFilter (000001F58AB605B0) returned failure for request: vtkInformation (000001F58AD53B40)
2025-11-18 14:17:51.211 ( 249.359s) [ A0BCB1AFA88E3F7] vtkExecutive.cxx:730 ERR| vtkCompositeDataPipeline (000001F58D9AA4F0): Algorithm vtkBooleanOperationPolyDataFilter (000001F581108840) returned failure for request: vtkInformation (000001F58AD516F0)
Debug: Off
Modified Time: 3458980
Reference Count: 1
Registered Events: (none)
Request: REQUEST_DATA
FORWARD_DIRECTION: 0
ALGORITHM_AFTER_FORWARD: 1
FROM_OUTPUT_PORT: 0

ERROR:root:Algorithm vtkBooleanOperationPolyDataFilter (000001F581108840) returned failure for request: vtkInformation (000001F58AD516F0)
Union tubes : 60%|███████████████████████████████████████████████▍ | 6/10 [00:17<00:15, 3.83s/union]Traceback (most recent call last):
File "", line 1, in
File "C:\Users\micha\Downloads\Simulations\Pyvista Scripts\sample_baffle\Sample_Baffle.py", line 22, in
sim.build_meshes(fluid=True,tissue=True,boundary_layer=False)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\simulation\simulation.py", line 96, in build_meshes
fluid_surface_mesh = self.synthetic_object.export_solid(watertight=True)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\tree\tree.py", line 296, in export_solid
model = build_watertight_solid(self)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\tree\export\export_solid.py", line 733, in build_watertight_solid
model = union_tubes_balanced(tubes, lines, cap_resolution=cap_resolution)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\tree\export\export_solid.py", line 891, in union_tubes_balanced
raise e
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\tree\export\export_solid.py", line 885, in union_tubes_balanced
merged = boolean(comp_mesh[ra], comp_mesh[rb], operation='union', fix_mesh=fix_mesh, engine=engine)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\svv\domain\routines\boolean.py", line 73, in boolean
result = pyvista_object_1.boolean_union(pyvista_object_2)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\pyvista\core\filters\poly_data.py", line 183, in boolean_union
return self._boolean('union', other_mesh, tolerance, progress_bar=progress_bar)
File "C:\Users\micha\miniconda3\envs\svv\lib\site-packages\pyvista\core\filters\poly_data.py", line 93, in _boolean
raise NotAllTrianglesError("Make sure both the input and output are triangulated.")
pyvista.core.errors.NotAllTrianglesError: Make sure both the input and output are triangulated.

Reproduction

import pyvista as pv
from svv.domain.domain import Domain
from svv.tree.tree import Tree

mesh = pv.read('sample_baffle_extrude_allometric3_repaired2.stl').triangulate()
baffle = Domain(mesh)
baffle.create()
baffle.solve()
baffle.build()

t = Tree()
t.set_domain(baffle)
'''t.parameters.set('root_pressure',100)
t.parameters.set('terminal_pressure',0)'''
t.set_root()
t.n_add(10)

from svv.simulation.simulation import Simulation

sim = Simulation(t)
sim.build_meshes(fluid=True,tissue=True,boundary_layer=False)
sim.extract_faces()

sim.construct_3d_fluid_simulation()
sim.write_3d_fluid_simulation()

Expected behavior

Perform intersection

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct and Contributing Guidelines

Start with the reproduction in Sample_Baffle.py, then trace the failure through svv/tree/export/export_solid.py and svv/domain/routines/boolean.py. Run the supplied mesh-building sequence and inspect the PyVista intersection and boolean errors. Done means the intersection and subsequent fluid mesh construction complete successfully for the reproduced case.