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# SPDX-FileCopyrightText: 2025 Blender Authors
#
# SPDX-License-Identifier: GPL-2.0-or-later */
__all__ = (
"main",
)
import unittest
import sys
import pathlib
import numpy as np
import bpy
"""
blender -b --factory-startup --python tests/python/bl_sculpt.py -- --testdir tests/files/sculpting/
"""
args = None
def set_view3d_context_override(context_override):
"""
Set context override to become the first viewport in the active workspace
The ``context_override`` is expected to be a copy of an actual current context
obtained by `context.copy()`
"""
for area in context_override["screen"].areas:
if area.type != 'VIEW_3D':
continue
for space in area.spaces:
if space.type != 'VIEW_3D':
continue
for region in area.regions:
if region.type != 'WINDOW':
continue
context_override["area"] = area
context_override["region"] = region
class MaskByColorTest(unittest.TestCase):
def setUp(self):
bpy.ops.wm.open_mainfile(filepath=str(args.testdir / "plane_with_red_circle.blend"), load_ui=False)
self.context_override = bpy.context.copy()
set_view3d_context_override(self.context_override)
bpy.ops.ed.undo_push()
def test_off_grid_returns_cancelled(self):
"""Test that operator does not run when the cursor is not on the mesh."""
with bpy.context.temp_override(**self.context_override):
location = (0, 0)
ret_val = bpy.ops.sculpt.mask_by_color(location=location)
self.assertEqual({'CANCELLED'}, ret_val)
mesh = bpy.context.object.data
self.assertFalse('.sculpt_mask' in mesh.attributes.keys(), "Mesh should not have the .sculpt_mask attribute!")
def test_on_circle_masks_red_vertices(self):
"""Test that the operator only masks red vertices on the mesh."""
with bpy.context.temp_override(**self.context_override):
location = (int(self.context_override['area'].width / 2), int(self.context_override['area'].height / 2))
ret_val = bpy.ops.sculpt.mask_by_color(location=location)
self.assertEqual({'FINISHED'}, ret_val)
mesh = bpy.context.object.data
color_attr = mesh.attributes['Color']
mask_attr = mesh.attributes['.sculpt_mask']
num_vertices = mesh.attributes.domain_size('POINT')
color_data = np.zeros((num_vertices, 4), dtype=np.float32)
color_attr.data.foreach_get('color', np.ravel(color_data))
mask_data = np.zeros(num_vertices, dtype=np.float32)
mask_attr.data.foreach_get('value', mask_data)
for i in range(num_vertices):
# If either of the green or blue components are less than 1 (i.e. the vertex is the red part of the image instead of
# the white background), then that vertex should also be masked.
if color_data[i][1] < 0.4 and color_data[i][2] < 0.4:
self.assertTrue(mask_data[i] > 0.0, f"Vertex {i} should be masked ({color_data[i]}) -> {mask_data[i]}")
else:
self.assertTrue(mask_data[i] < 0.1,
f"Vertex {i} should not be masked ({color_data[i]}) -> {mask_data[i]}")
class MaskFromCavityTest(unittest.TestCase):
def setUp(self):
bpy.ops.wm.open_mainfile(filepath=str(args.testdir / "plane_with_valley.blend"), load_ui=False)
bpy.ops.ed.undo_push()
def test_operator_masks_low_vertices(self):
"""Test that the operator applies a full mask value to any elements that are part of the cavity."""
ret_val = bpy.ops.sculpt.mask_from_cavity()
self.assertEqual({'FINISHED'}, ret_val)
mesh = bpy.context.object.data
position_attr = mesh.attributes['position']
mask_attr = mesh.attributes['.sculpt_mask']
num_vertices = mesh.attributes.domain_size('POINT')
position_data = np.zeros((num_vertices, 3), dtype=np.float32)
position_attr.data.foreach_get('vector', np.ravel(position_data))
mask_data = np.zeros(num_vertices, dtype=np.float32)
mask_attr.data.foreach_get('value', mask_data)
for i in range(num_vertices):
if position_data[i][2] < 0.0:
self.assertEqual(
mask_data[i],
1.0,
f"Vertex {i} should be fully masked ({position_data[i]}) -> {mask_data[i]}")
else:
self.assertNotEqual(mask_data[i], 1.0,
f"Vertex {i} should not be fully masked ({position_data[i]}) -> {mask_data[i]}")
class DetailFloodFillTest(unittest.TestCase):
def setUp(self):
bpy.ops.wm.read_factory_settings(use_empty=True)
bpy.ops.ed.undo_push()
bpy.ops.mesh.primitive_cube_add()
bpy.ops.sculpt.sculptmode_toggle()
bpy.ops.sculpt.dynamic_topology_toggle()
def test_operator_subdivides_mesh(self):
"""Test that the operator generates a mesh with appropriately sized edges."""
max_edge_length = 1.0
# Based on the detail_size::EDGE_LENGTH_MIN_FACTOR constant
min_edge_length = max_edge_length * 0.4
bpy.context.scene.tool_settings.sculpt.detail_type_method = 'CONSTANT'
bpy.context.scene.tool_settings.sculpt.constant_detail_resolution = max_edge_length
ret_val = bpy.ops.sculpt.detail_flood_fill()
self.assertEqual({'FINISHED'}, ret_val)
# Toggle to ensure the mesh data is refreshed.
bpy.ops.sculpt.dynamic_topology_toggle()
mesh = bpy.context.object.data
for edge in mesh.edges:
v0 = mesh.vertices[edge.vertices[0]]
v1 = mesh.vertices[edge.vertices[1]]
length = (v0.co - v1.co).length
self.assertGreaterEqual(
length,
min_edge_length,
f"Edge between {v0.index} and {v1.index} should be longer than minimum length")
self.assertLessEqual(
length,
max_edge_length,
f"Edge between {v0.index} and {v1.index} should be shorter than maximum length")
def main():
global args
import argparse
argv = [sys.argv[0]]
if '--' in sys.argv:
argv += sys.argv[sys.argv.index('--') + 1:]
parser = argparse.ArgumentParser()
parser.add_argument('--testdir', required=True, type=pathlib.Path)
args, remaining = parser.parse_known_args(argv)
unittest.main(argv=remaining)
if __name__ == "__main__":
main()
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