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# SPDX-FileCopyrightText: 2025 Blender Authors
#
# SPDX-License-Identifier: GPL-2.0-or-later
import unittest
import bpy
import sys
import pathlib
from mathutils import Vector
class TestMeshJoin(unittest.TestCase):
def test_simple(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.mesh.primitive_cube_add()
mesh = bpy.data.objects['Cube'].data
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = bpy.data.objects['Cube']
bpy.ops.object.join()
self.assertEqual(len(mesh.vertices), 16)
def test_face_sets(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.mesh.primitive_monkey_add()
bpy.ops.mesh.primitive_uv_sphere_add()
cube_obj = bpy.data.objects['Cube']
cube = cube_obj.data
monkey = bpy.data.objects['Suzanne'].data
sphere = bpy.data.objects['Sphere'].data
attr = cube.attributes.new(name=".sculpt_face_set", type='INT', domain='FACE')
attr.data[0].value = 1
attr.data[1].value = 1
attr.data[2].value = 45
attr.data[3].value = 45
attr.data[4].value = 45
attr.data[5].value = 45
b = monkey.attributes.new(name=".sculpt_face_set", type='INT', domain='FACE')
b.data[0].value = 52
b.data[1].value = 52
b.data[2].value = 52
b.data[3].value = 52
b.data[4].value = 52
b.data[5].value = 52
sphere.attributes.new(name=".sculpt_face_set", type='INT', domain='FACE')
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_obj
bpy.ops.object.join()
joined_attr = cube.attributes[".sculpt_face_set"]
self.assertEqual(len(joined_attr.data), 1018)
self.assertEqual(joined_attr.data[0].value, 1)
self.assertEqual(joined_attr.data[1].value, 1)
self.assertEqual(joined_attr.data[2].value, 45)
self.assertEqual(joined_attr.data[9].value, 98)
self.assertEqual(joined_attr.data[20].value, 46)
def test_materials_simple(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
mat_1 = bpy.data.materials.new('mat_1')
bpy.ops.mesh.primitive_cube_add()
cube_1 = bpy.context.view_layer.objects.active
cube_1.data.materials.append(mat_1)
bpy.ops.mesh.primitive_cube_add()
cube_2 = bpy.context.view_layer.objects.active
cube_2.data.materials.append(mat_1)
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_1
bpy.ops.object.join()
result_mesh = cube_1.data
self.assertEqual(len(result_mesh.materials), 1)
self.assertFalse(result_mesh.attributes.get("material_index"))
def test_no_materials_with_indices(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
mat_1 = bpy.data.materials.new('mat_1')
bpy.ops.mesh.primitive_cube_add()
cube_1 = bpy.context.view_layer.objects.active
cube_1.data.materials.append(mat_1)
material_indices = cube_1.data.attributes.new(name="material_index", type='INT', domain='FACE')
bpy.ops.mesh.primitive_cube_add()
cube_2 = bpy.context.view_layer.objects.active
material_indices = cube_2.data.attributes.new(name="material_index", type='INT', domain='FACE')
material_indices.data.foreach_set('value', [0, 1, 1, 700, 1, 2])
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_1
bpy.ops.object.join()
result_mesh = cube_1.data
self.assertEqual(len(result_mesh.materials), 2)
material_indices = cube_1.data.attributes["material_index"]
self.assertTrue(material_indices)
material_index_data = [m.value for m in material_indices.data]
self.assertEqual(material_index_data, [0] * 6 + [0, 1, 1, 700, 1, 2])
def test_materials(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
mat_1 = bpy.data.materials.new('mat_1')
mat_2 = bpy.data.materials.new('mat_2')
mat_3 = bpy.data.materials.new('mat_3')
mat_4 = bpy.data.materials.new('mat_4')
bpy.ops.mesh.primitive_cube_add()
cube_no_mats = bpy.context.view_layer.objects.active
bpy.ops.mesh.primitive_cube_add()
cube_2 = bpy.context.view_layer.objects.active
cube_2.data.materials.append(mat_1)
cube_2.data.materials.append(mat_2)
cube_2.data.materials.append(mat_3)
material_indices = cube_2.data.attributes.new(name="material_index", type='INT', domain='FACE')
material_indices.data.foreach_set('value', [0, 1, 2, 0, 1, 2])
bpy.ops.mesh.primitive_cube_add()
cube_2_mats = bpy.context.view_layer.objects.active
cube_2_mats.data.materials.append(mat_3)
cube_2_mats.data.materials.append(mat_4)
material_indices = cube_2_mats.data.attributes.new(name="material_index", type='INT', domain='FACE')
material_indices.data.foreach_set('value', [0, 0, 0, 1, 1, 1])
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_no_mats
bpy.ops.object.join()
result_mesh = cube_no_mats.data
self.assertEqual(len(result_mesh.materials), 5)
material_indices = result_mesh.attributes["material_index"]
material_index_data = [m.value for m in material_indices.data]
self.assertEqual(material_index_data, [0] * 6 + [1, 2, 3, 1, 2, 3] + [3, 3, 3, 4, 4, 4])
def test_shared_object_data(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
cube_1 = bpy.context.view_layer.objects.active
bpy.ops.object.duplicate(linked=True)
cube_2 = bpy.context.view_layer.objects.active
self.assertEqual(cube_1.data.name, cube_2.data.name)
bpy.ops.mesh.primitive_cube_add()
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_1
bpy.ops.object.join()
self.assertEqual(len(cube_1.data.vertices), 24)
def test_shape_keys(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
cube_1 = bpy.context.view_layer.objects.active
cube_1.shape_key_add(name="Basis")
key = cube_1.shape_key_add(name="A")
key = cube_1.shape_key_add(name="B")
cube_1.data.shape_keys.key_blocks["B"].data[0].co = Vector((-1, -4, -1))
bpy.ops.mesh.primitive_cube_add()
cube_2 = bpy.context.view_layer.objects.active
cube_2.shape_key_add(name="Basis")
key = cube_2.shape_key_add(name="A")
key = cube_2.shape_key_add(name="B")
key = cube_2.shape_key_add(name="C")
key = cube_2.shape_key_add(name="D")
cube_2.data.shape_keys.key_blocks["B"].data[5].co = Vector((1, -3, 1))
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_1
bpy.ops.object.join()
self.assertEqual(len(cube_1.data.vertices), 16)
self.assertEqual(len(cube_1.data.shape_keys.key_blocks), 5)
self.assertEqual(cube_1.data.shape_keys.key_blocks["B"].data[0].co, Vector((-1.0, -4.0, -1.0)))
self.assertEqual(cube_1.data.shape_keys.key_blocks["B"].data[13].co, Vector((1.0, -3.0, 1.0)))
def test_shape_keys_not_active(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
cube_1 = bpy.context.object
cube_1.shape_key_add(name="Basis")
key = cube_1.shape_key_add(name="A")
key = cube_1.shape_key_add(name="B")
key = cube_1.shape_key_add(name="C")
bpy.ops.mesh.primitive_cube_add()
cube_2 = bpy.context.object
bpy.ops.object.select_all(action='SELECT')
bpy.context.view_layer.objects.active = cube_2
bpy.ops.object.join()
self.assertEqual(len(cube_2.data.vertices), 16)
self.assertEqual(len(cube_2.data.shape_keys.key_blocks), 4)
def test_no_faces(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.mode_set(mode='EDIT', toggle=False)
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.mesh.delete(type='ONLY_FACE')
bpy.ops.object.mode_set(mode='OBJECT', toggle=False)
bpy.ops.object.join()
joined = bpy.context.object
self.assertEqual(len(joined.data.vertices), 16)
self.assertEqual(len(joined.data.polygons), 0)
def test_params(self):
bpy.ops.object.select_all(action='SELECT')
bpy.ops.object.delete()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.object.select_all(action='SELECT')
bpy.context.object.data.use_remesh_preserve_volume = False
bpy.ops.object.join()
joined = bpy.context.object
self.assertEqual(joined.data.use_remesh_preserve_volume, False)
if __name__ == '__main__':
import sys
sys.argv = [__file__] + (sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else [])
unittest.main()
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