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examples/samples/bbox.mtl

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+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Material
+Ns 323.999994
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2

examples/samples/bbox.obj

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+# Blender v3.0.0 OBJ File: ''
+# www.blender.org
+mtllib bbox.mtl
+o Cube
+v 1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+vt 0.875000 0.500000
+vt 0.625000 0.750000
+vt 0.625000 0.500000
+vt 0.375000 1.000000
+vt 0.375000 0.750000
+vt 0.625000 0.000000
+vt 0.375000 0.250000
+vt 0.375000 0.000000
+vt 0.375000 0.500000
+vt 0.125000 0.750000
+vt 0.125000 0.500000
+vt 0.625000 0.250000
+vt 0.875000 0.750000
+vt 0.625000 1.000000
+vn 0.0000 1.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn -1.0000 0.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 -1.0000
+usemtl Material
+s off
+f 5/1/1 3/2/1 1/3/1
+f 3/2/2 8/4/2 4/5/2
+f 7/6/3 6/7/3 8/8/3
+f 2/9/4 8/10/4 6/11/4
+f 1/3/5 4/5/5 2/9/5
+f 5/12/6 2/9/6 6/7/6
+f 5/1/1 7/13/1 3/2/1
+f 3/2/2 7/14/2 8/4/2
+f 7/6/3 5/12/3 6/7/3
+f 2/9/4 4/5/4 8/10/4
+f 1/3/5 3/2/5 4/5/5
+f 5/12/6 1/3/6 2/9/6

examples/samples/colored_sphere.obj.mtl

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+#
+# Wavefront material file
+# Converted by Meshlab Group
+#
+
+newmtl material_0
+Ka 0.200000 0.200000 0.200000
+Kd 0.752941 0.752941 0.752941
+Ks 1.000000 1.000000 1.000000
+Tr 1.000000
+illum 2
+Ns 0.000000
+map_Kd sphere_mtl.jpg
+