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Regression test for armature deformation on lattice

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This is a basic armature deformation test for #141535  using Lattices instead of
Mesh as the target object type. Lattice deformation was briefly broken, which is
caught by this test.

The test adds the general-purpose `unit_test_compare` function to lattice object
data. It only compares lattice point counts and positions for now, more data can
be added later if necessary.

The `MeshTest` class did not support lattice object types yet, so needed some
changes. The Curves case was already supported, but only by full conversion to
mesh data, without actually using the `unit_test_compare` function specific for
curves geometry. This is unchanged, because applying constructive modifiers on
curves does not work. If it were not for this limitation the test could do
actual curves comparisons now.

For lattice support the `MeshTest` class comparison function has been
generalized to all supported object data types. It runs the appropriate
`unit_test_compare` api function and validation where supported (only meshes at
this point).

Pull Request: https://projects.blender.org/blender/blender/pulls/141546
This commit is contained in:
Lukas Tönne 2025-07-09 09:53:00 +02:00
parent dcd8d4423d
commit bb293e5677
6 changed files with 134 additions and 27 deletions
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15
tests/python/modifiers.py
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@ -377,6 +377,21 @@ def main():
'use_vertex_groups': True,
'vertex_group': "Mask",
'use_multi_modifier': True})])]),
SpecMeshTest("ArmatureLatticeEnvelope", "testLatticeArmatureEnvelope", "expectedLatticeArmatureEnvelope",
[ModifierSpec('armature', 'ARMATURE',
{'object': bpy.data.objects['testArmatureLatticeEnvelope'],
'use_vertex_groups': False,
'use_bone_envelopes': True})]),
SpecMeshTest("ArmatureLatticeVGroup", "testLatticeArmatureVGroup", "expectedLatticeArmatureVGroup",
[ModifierSpec('armature', 'ARMATURE',
{'object': bpy.data.objects['testArmatureLatticeVGroup'],
'use_vertex_groups': True,
'use_bone_envelopes': False})]),
SpecMeshTest("ArmatureLatticeNoVGroup", "testLatticeArmatureNoVGroup", "expectedLatticeArmatureNoVGroup",
[ModifierSpec('armature', 'ARMATURE',
{'object': bpy.data.objects['testArmatureLatticeNoVGroup'],
'use_vertex_groups': True,
'use_bone_envelopes': False})]),
]
boolean_basename = "CubeBooleanDiffBMeshObject"