7bc893c827
Currently this only tests the Child Of constraint. My aim is to cover constraints with tests before they are refactored/altered. No functional changes.
180 lines
7.4 KiB
Python
180 lines
7.4 KiB
Python
# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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"""
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./blender.bin --background -noaudio --factory-startup --python tests/python/bl_constraints.py -- --testdir /path/to/lib/tests/constraints
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"""
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import pathlib
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import sys
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import unittest
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import bpy
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from mathutils import Matrix
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class AbstractConstraintTests(unittest.TestCase):
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"""Useful functionality for constraint tests."""
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def setUp(self):
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bpy.ops.wm.open_mainfile(filepath=str(args.testdir / "constraints.blend"))
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def assert_matrix(self, actual, expect, places=6, delta=None):
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"""Asserts that the matrices almost equal."""
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self.assertEqual(len(actual), 4, 'Expected a 4x4 matrix')
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# TODO(Sybren): decompose the matrices and compare loc, rot, and scale separately.
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# That'll probably improve readability & understandability of test failures.
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for row, (act_row, exp_row) in enumerate(zip(actual, expect)):
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for col, (act, exp) in enumerate(zip(act_row, exp_row)):
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self.assertAlmostEqual(act, exp, places=places, delta=delta,
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msg=f'{act} != {exp} at element [{row}][{col}]')
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def matrix(self, object_name: str) -> Matrix:
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"""Return the evaluated world matrix."""
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depsgraph = bpy.context.view_layer.depsgraph
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depsgraph.update()
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ob_orig = bpy.context.scene.objects[object_name]
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ob_eval = ob_orig.evaluated_get(depsgraph)
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return ob_eval.matrix_world
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def matrix_test(self, object_name: str, expect: Matrix):
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"""Assert that the object's world matrix is as expected."""
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actual = self.matrix(object_name)
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self.assert_matrix(actual, expect)
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def constraint_context(self, constraint_name: str) -> dict:
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"""Return a context suitable for calling constraint operators.
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Assumes the owner is called "{constraint_name}.owner".
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"""
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owner = bpy.context.scene.objects['Child Of.owner']
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constraint = owner.constraints[constraint_name]
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context = {
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**bpy.context.copy(),
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'constraint': constraint,
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}
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return context
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class ChildOfTest(AbstractConstraintTests):
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def test_childof_simple_parent(self):
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"""Child Of: simple evaluation."""
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initial_matrix = Matrix((
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(0.5872668623924255, -0.3642929494380951, 0.29567837715148926, 1.0886117219924927),
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(0.31689348816871643, 0.7095895409584045, 0.05480116978287697, 2.178966999053955),
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(-0.21244174242019653, 0.06738340109586716, 0.8475662469863892, 3.2520291805267334),
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(0.0, 0.0, 0.0, 1.0),
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))
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self.matrix_test('Child Of.owner', initial_matrix)
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context = self.constraint_context('Child Of')
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bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', Matrix((
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(0.9992385506629944, 0.019844001159071922, -0.03359175845980644, 0.10000011324882507),
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(-0.01744179055094719, 0.997369647026062, 0.07035345584154129, 0.1999998837709427),
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(0.034899525344371796, -0.06971397250890732, 0.9969563484191895, 0.3000001311302185),
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(0.0, 0.0, 0.0, 1.0),
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)))
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bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', initial_matrix)
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def test_childof_rotation_only(self):
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"""Child Of: rotation only."""
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owner = bpy.context.scene.objects['Child Of.owner']
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constraint = owner.constraints['Child Of']
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constraint.use_location_x = constraint.use_location_y = constraint.use_location_z = False
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constraint.use_scale_x = constraint.use_scale_y = constraint.use_scale_z = False
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initial_matrix = Matrix((
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(0.8340795636177063, -0.4500490725040436, 0.31900957226753235, 0.10000000149011612),
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(0.4547243118286133, 0.8883093595504761, 0.06428192555904388, 0.20000000298023224),
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(-0.31230923533439636, 0.09144517779350281, 0.9455690383911133, 0.30000001192092896),
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(0.0, 0.0, 0.0, 1.0),
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))
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self.matrix_test('Child Of.owner', initial_matrix)
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context = self.constraint_context('Child Of')
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bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', Matrix((
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(0.9992386102676392, 0.019843975082039833, -0.033591702580451965, 0.10000000149011612),
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(-0.017441781237721443, 0.9973695874214172, 0.0703534483909607, 0.20000000298023224),
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(0.03489946573972702, -0.06971397250890732, 0.9969563484191895, 0.30000001192092896),
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(0.0, 0.0, 0.0, 1.0),
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)))
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bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', initial_matrix)
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def test_childof_no_x_axis(self):
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"""Child Of: loc/rot/scale on only Y and Z axes."""
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owner = bpy.context.scene.objects['Child Of.owner']
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constraint = owner.constraints['Child Of']
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constraint.use_location_x = False
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constraint.use_rotation_x = False
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constraint.use_scale_x = False
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initial_matrix = Matrix((
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(0.8294582366943359, -0.4013831615447998, 0.2102886438369751, 0.10000000149011612),
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(0.46277597546577454, 0.6895919442176819, 0.18639995157718658, 2.2317214012145996),
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(-0.31224438548088074, -0.06574578583240509, 0.8546382784843445, 3.219514846801758),
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(0.0, 0.0, 0.0, 1.0),
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))
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self.matrix_test('Child Of.owner', initial_matrix)
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context = self.constraint_context('Child Of')
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bpy.ops.constraint.childof_set_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', Matrix((
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(0.9228900671005249, 0.23250490427017212, -0.035540513694286346, 0.10000000149011612),
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(-0.011224273592233658, 0.9838480949401855, 0.24731633067131042, 0.21246682107448578),
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(0.0383986234664917, -0.3163823187351227, 0.9553266167640686, 0.27248233556747437),
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(0.0, 0.0, 0.0, 1.0),
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)))
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bpy.ops.constraint.childof_clear_inverse(context, constraint='Child Of')
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self.matrix_test('Child Of.owner', initial_matrix)
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def main():
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global args
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import argparse
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if '--' in sys.argv:
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argv = [sys.argv[0]] + sys.argv[sys.argv.index('--') + 1:]
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else:
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argv = sys.argv
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parser = argparse.ArgumentParser()
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parser.add_argument('--testdir', required=True, type=pathlib.Path)
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args, remaining = parser.parse_known_args(argv)
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unittest.main(argv=remaining)
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if __name__ == "__main__":
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import traceback
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# So a python error exits Blender itself too
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try:
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main()
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except SystemExit:
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raise
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except:
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traceback.print_exc()
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sys.exit(1)
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