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import os
import unittest
import pywavefront.parser
from pywavefront.exceptions import PywavefrontException
from pywavefront.material import MaterialParser
from utils import fixture
class TestParsers(unittest.TestCase):
def setUp(self):
# Append current path to locate files
meshes = pywavefront.Wavefront(fixture('simple.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
self.maxDiff = None
def testObjName(self):
"""Parsing an obj file with known names should set those names."""
self.assertEqual(self.mesh1.name, 'Simple')
self.assertEqual(self.mesh2.name, 'SimpleB')
def testObjVertices(self):
"""Parsing an obj file with known vertices should set those vertices."""
# tests v, vt, vn, and f
self.assertEqual(self.mesh1.materials[0].vertices, [
14.0, 15.0, 20.0, 21.0, 22.0, 0.04, 0.05, 0.06,
12.0, 13.0, 20.0, 21.0, 22.0, 0.01, 0.02, 0.03,
10.0, 11.0, 20.0, 21.0, 22.0, 0.07, 0.08, 0.09])
self.assertEqual(self.mesh2.materials[0].vertices, [
1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0])
self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_N3F_V3F")
def testObjMaterials(self):
"""Parsing an obj file with known materials should load and assign materials."""
# tests mtllib and usemtl
material1 = self.mesh1.materials[0]
material2 = self.mesh2.materials[0]
self.assertEqual(material1.name, 'Material.simple')
self.assertEqual(material2.name, 'Material2.simple')
class TestParserCollectFaces(unittest.TestCase):
"""Test collecting (possibly triangulated) faces"""
def setUp(self):
self.meshes = pywavefront.Wavefront(fixture('arbitrary-faces.obj'), collect_faces=True).meshes
def testTrianglesOnlyFaces(self):
self.assertTrue(self.meshes['triangleOnly'].has_faces)
self.assertEqual(self.meshes['triangleOnly'].faces, [[1, 0, 2]])
def testQuadFaces(self):
self.assertTrue(self.meshes['quadOnly'].has_faces)
self.assertEqual(self.meshes['quadOnly'].faces, [
[4, 5, 6], [7, 4, 6],
[5, 4, 6], [7, 5, 6],
[7, 6, 4], [5, 7, 4]
])
def testArbitrarilyMixedFaced(self):
self.assertTrue(self.meshes['arbitrary'].has_faces)
self.assertEqual(self.meshes['arbitrary'].faces, [
[8, 9, 10], [11, 8, 10],
[11, 8, 9], [10, 11, 9], [12, 11, 10],
[12, 9, 10], [8, 12, 10], [11, 12, 8], [13, 12, 11],
[13, 11, 9]
])
class NegativeIndices(TestParsers):
"""Run all tests with negative indices"""
def setUp(self):
# Append current path to locate files
meshes = pywavefront.Wavefront(fixture('simple_negative_indices.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
class TestParserGz(TestParsers):
"""Run all tests is TestParsers for gzip file as well"""
def setUp(self):
# Append current path to locate files
meshes = pywavefront.Wavefront(fixture('simple.obj.gz'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
class TestParserMissingMaterials(unittest.TestCase):
"""Test `create_materials` functionality"""
def test_missing_material_error(self):
"""Parser should crash if `create_materials` is not set"""
with self.assertRaises(IOError):
pywavefront.Wavefront(fixture('simple_missing_material.obj'))
def test_missing_material_create(self):
"""Parser should handle missing materials if `create_materials` is set"""
pywavefront.Wavefront(fixture('simple_missing_material.obj'), create_materials=True)
class TestParserVertexVariants(unittest.TestCase):
maxDiff = None
def testObjNoNormals(self):
"""Parse obj without normals"""
# tests v, vt and f
meshes = pywavefront.Wavefront(fixture('simple_vt.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh1.materials[0].vertices, [
14.0, 15.0, 0.04, 0.05, 0.06,
12.0, 13.0, 0.01, 0.02, 0.03,
10.0, 11.0, 0.07, 0.08, 0.09])
self.assertEqual(self.mesh2.materials[0].vertices, [
1.0, 0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 1.0, 0.0, -1.0])
self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_V3F")
def testOnlyOneVertex(self):
meshes = pywavefront.Wavefront(fixture('simple_one_vertex.obj'))
self.vertices = meshes.vertices
self.meshes = meshes.mesh_list
self.assertEqual(1, len(self.meshes))
self.assertEqual(1, len(self.vertices))
def testObjNoUVs(self):
"""Parse object with no uvs"""
meshes = pywavefront.Wavefront(fixture('simple_normals.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh1.materials[0].vertices, [
20.0, 21.0, 22.0, 0.04, 0.05, 0.06,
20.0, 21.0, 22.0, 0.01, 0.02, 0.03,
20.0, 21.0, 22.0, 0.07, 0.08, 0.09])
self.assertEqual(self.mesh2.materials[0].vertices, [
0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, -0.0, 1.0, 0.0, -1.0])
self.assertEqual(self.mesh2.materials[0].vertex_format, "N3F_V3F")
def testObjOnlyPositions(self):
meshes = pywavefront.Wavefront(fixture('simple_positions.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh1.materials[0].vertices, [
0.04, 0.05, 0.06,
0.01, 0.02, 0.03,
0.07, 0.08, 0.09])
self.assertEqual(self.mesh2.materials[0].vertices, [
-1.0, 0.0, 1.0,
1.0, 0.0, 1.0,
1.0, 0.0, -1.0])
self.assertEqual(self.mesh2.materials[0].vertex_format, "V3F")
def testObjColors(self):
meshes = pywavefront.Wavefront(fixture('simple_colors.obj'))
self.mesh1 = meshes.mesh_list[0]
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh1.materials[0].vertices, [
14.0, 15.0, 1.0, 0.0, 0.0, 20.0, 21.0, 22.0, 0.04, 0.05, 0.06,
12.0, 13.0, 1.0, 0.0, 0.0, 20.0, 21.0, 22.0, 0.01, 0.02, 0.03,
10.0, 11.0, 1.0, 0.0, 0.0, 20.0, 21.0, 22.0, 0.07, 0.08, 0.09])
self.assertEqual(self.mesh2.materials[0].vertices, [
1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0])
self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_C3F_N3F_V3F")
def test_undefined_uvs(self):
"""obj file were some uv entries are undefined"""
meshes = pywavefront.Wavefront(fixture('simple_missing_uv.obj'))
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh2.materials[0].vertices, [
1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0,
10.0, 11.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
10.0, 11.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
10.0, 11.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0,
1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0,
])
self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_N3F_V3F")
def test_undefined_normals(self):
"""obj file were some uv entries are undefined"""
meshes = pywavefront.Wavefront(fixture('simple_missing_normal.obj'))
self.mesh2 = meshes.mesh_list[1]
self.assertEqual(self.mesh2.materials[0].vertices, [
1.0, 0.0, 0.0, 1.0, 0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, -1.0,
1.0, 0.0, 20, 21, 22, -1.0, 0.0, 1.0,
0.0, 0.0, 20, 21, 22, 1.0, 0.0, 1.0,
0.0, 1.0, 20, 21, 22, 1.0, 0.0, -1.0,
1.0, 0.0, 0.0, 1.0, -0.0, -1.0, 0.0, 1.0,
0.0, 0.0, 0.0, 1.0, -0.0, 1.0, 0.0, 1.0,
0.0, 1.0, 0.0, 1.0, -0.0, 1.0, 0.0, -1.0,
])
self.assertEqual(self.mesh2.materials[0].vertex_format, "T2F_N3F_V3F")
class TestMtlParser(unittest.TestCase):
def setUp(self):
parser = MaterialParser(fixture('simple_parsetest.mtl'), strict=True)
self.materials = parser.materials
self.material1 = self.materials['Material.simple']
self.material2 = self.materials['Material2.simple']
def testMtlName(self):
"""Parsing an obj file with known material names should set those names."""
self.assertIn('Material.simple', self.materials.keys())
self.assertIn('Material2.simple', self.materials.keys())
def testMtlShininess(self):
"""Parsing an obj file with known material shininess should set it."""
self.assertEqual(self.material1.shininess, 1.0)
def testMtlAmbient(self):
"""Parsing an obj file with known material ambient should set it."""
# also tests d
self.assertEqual(self.material1.ambient, [0., 0., 0., 1.])
def testMtlDiffuse(self):
"""Parsing an obj file with known material diffuse should set it."""
# also tests d
self.assertEqual(self.material1.diffuse, [0.1, 0.1, 0.1, 1.])
def testMtlSpecular(self):
"""Parsing an obj file with known material specular should set it."""
# also tests d
self.assertEqual(self.material1.specular, [0.2, 0.2, 0.2, 1.])
def testMtlTransparency(self):
self.assertEqual(self.material1.transparency, 1.0)
def testMtlIllum(self):
self.assertEqual(self.material1.illumination_model, 2)
def testMtlNi(self):
self.assertEqual(self.material1.optical_density, 0.75)
def testTextures(self):
self.assertEqual(self.material1.texture.path, str(fixture('kd.png')))
self.assertEqual(self.material1.texture.name, 'kd.png')
self.assertEqual(self.material1.texture_ambient.path, str(fixture('ka.png')))
self.assertEqual(self.material1.texture_ambient.name, 'ka.png')
self.assertEqual(self.material1.texture_specular_color.path, str(fixture('ks.png')))
self.assertEqual(self.material1.texture_specular_color.name, 'ks.png')
self.assertEqual(self.material1.texture_specular_highlight.path, str(fixture('ns.png')))
self.assertEqual(self.material1.texture_specular_highlight.name, 'ns.png')
self.assertEqual(self.material1.texture_alpha.path, str(fixture('d.png')))
self.assertEqual(self.material1.texture_alpha.name, 'd.png')
self.assertEqual(self.material1.texture_bump.path, str(fixture('bump.png')))
self.assertEqual(self.material1.texture_bump.name, 'bump.png')
class TestParserFailure(unittest.TestCase):
def testMissingParseFunction(self):
"""Attempting to parse with a missing parse function should raise an exception."""
# since no parse functions have been defined, this will always fail in strict mode
parser = pywavefront.parser.Parser(fixture('simple.obj'), strict=True)
self.assertRaises(PywavefrontException, parser.parse)
def testMissingParsedFile(self):
"""Attempting to read a non-exiting file should raise an exception."""
file_name = 'doesnotexist.obj'
with self.assertRaises(IOError):
parser = pywavefront.parser.Parser(fixture(file_name))
parser.parse()
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