# ##### BEGIN GPL LICENSE BLOCK ##### # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # # ##### END GPL LICENSE BLOCK ##### """ ./blender.bin --background -noaudio --factory-startup --python tests/python/bl_constraints.py -- --testdir /path/to/lib/tests/constraints """ import pathlib import sys import unittest import bpy from mathutils import Matrix class AbstractConstraintTests(unittest.TestCase): """Useful functionality for constraint tests.""" def setUp(self): bpy.ops.wm.open_mainfile(filepath=str(args.testdir / "constraints.blend")) def assert_matrix(self, actual, expect, places=6, delta=None): """Asserts that the matrices almost equal.""" self.assertEqual(len(actual), 4, 'Expected a 4x4 matrix') # TODO(Sybren): decompose the matrices and compare loc, rot, and scale separately. # That'll probably improve readability & understandability of test failures. for row, (act_row, exp_row) in enumerate(zip(actual, expect)): for col, (act, exp) in enumerate(zip(act_row, exp_row)): self.assertAlmostEqual(act, exp, places=places, delta=delta, msg=f'{act} != {exp} at element [{row}][{col}]') def matrix(self, object_name: str) -> Matrix: """Return the evaluated world matrix.""" depsgraph = bpy.context.view_layer.depsgraph depsgraph.update() ob_orig = bpy.context.scene.objects[object_name] ob_eval = ob_orig.evaluated_get(depsgraph) return ob_eval.matrix_world def matrix_test(self, object_name: str, expect: Matrix): """Assert that the object's world matrix is as expected.""" actual = self.matrix(object_name) self.assert_matrix(actual, expect) def constraint_context(self, constraint_name: str) -> dict: """Return a context suitable for calling constraint operators. Assumes the owner is called "{constraint_name}.owner". """ owner = bpy.context.scene.objects['Child Of.owner'] constraint = owner.constraints[constraint_name] context = { **bpy.context.copy(), 'constraint': constraint, } return context class ChildOfTest(AbstractConstraintTests): def test_childof_simple_parent(self): """Child Of: simple evaluation.""" initial_matrix = Matrix(( (0.5872668623924255, -0.3642929494380951, 0.29567837715148926, 1.0886117219924927), (0.31689348816871643, 0.7095895409584045, 0.05480116978287697, 2.178966999053955), (-0.21244174242019653, 0.06738340109586716, 0.8475662469863892, 3.2520291805267334), (0.0, 0.0, 0.0, 1.0), )) self.matrix_test('Child Of.owner', initial_matrix) context = self.constraint_context('Child Of') bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', Matrix(( (0.9992385506629944, 0.019844001159071922, -0.03359175845980644, 0.10000011324882507), (-0.01744179055094719, 0.997369647026062, 0.07035345584154129, 0.1999998837709427), (0.034899525344371796, -0.06971397250890732, 0.9969563484191895, 0.3000001311302185), (0.0, 0.0, 0.0, 1.0), ))) bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', initial_matrix) def test_childof_rotation_only(self): """Child Of: rotation only.""" owner = bpy.context.scene.objects['Child Of.owner'] constraint = owner.constraints['Child Of'] constraint.use_location_x = constraint.use_location_y = constraint.use_location_z = False constraint.use_scale_x = constraint.use_scale_y = constraint.use_scale_z = False initial_matrix = Matrix(( (0.8340795636177063, -0.4500490725040436, 0.31900957226753235, 0.10000000149011612), (0.4547243118286133, 0.8883093595504761, 0.06428192555904388, 0.20000000298023224), (-0.31230923533439636, 0.09144517779350281, 0.9455690383911133, 0.30000001192092896), (0.0, 0.0, 0.0, 1.0), )) self.matrix_test('Child Of.owner', initial_matrix) context = self.constraint_context('Child Of') bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', Matrix(( (0.9992386102676392, 0.019843975082039833, -0.033591702580451965, 0.10000000149011612), (-0.017441781237721443, 0.9973695874214172, 0.0703534483909607, 0.20000000298023224), (0.03489946573972702, -0.06971397250890732, 0.9969563484191895, 0.30000001192092896), (0.0, 0.0, 0.0, 1.0), ))) bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', initial_matrix) def test_childof_no_x_axis(self): """Child Of: loc/rot/scale on only Y and Z axes.""" owner = bpy.context.scene.objects['Child Of.owner'] constraint = owner.constraints['Child Of'] constraint.use_location_x = False constraint.use_rotation_x = False constraint.use_scale_x = False initial_matrix = Matrix(( (0.8294582366943359, -0.4013831615447998, 0.2102886438369751, 0.10000000149011612), (0.46277597546577454, 0.6895919442176819, 0.18639995157718658, 2.2317214012145996), (-0.31224438548088074, -0.06574578583240509, 0.8546382784843445, 3.219514846801758), (0.0, 0.0, 0.0, 1.0), )) self.matrix_test('Child Of.owner', initial_matrix) context = self.constraint_context('Child Of') bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', Matrix(( (0.9228900671005249, 0.23250490427017212, -0.035540513694286346, 0.10000000149011612), (-0.011224273592233658, 0.9838480949401855, 0.24731633067131042, 0.21246682107448578), (0.0383986234664917, -0.3163823187351227, 0.9553266167640686, 0.27248233556747437), (0.0, 0.0, 0.0, 1.0), ))) bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of') self.matrix_test('Child Of.owner', initial_matrix) def main(): global args import argparse if '--' in sys.argv: argv = [sys.argv[0]] + sys.argv[sys.argv.index('--') + 1:] else: argv = sys.argv 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__": import traceback # So a python error exits Blender itself too try: main() except SystemExit: raise except: traceback.print_exc() sys.exit(1)