move "smooth" attribute from Triangle to Material
lwo reader enhancements - implement more chunk types, support for smoothing flag and SMAN (smoothing max. angle)
+ − # Blender v242 OBJ File: bow.blend
+ − # www.blender3d.org
+ − mtllib cube.mtl
+ − o Cube_Cube.001
+ − v -0.156446 0.619376 -1.609937
+ − v 1.108605 -0.823246 -1.045591
+ − v -0.353969 -1.695493 0.003248
+ − v -1.619020 -0.252870 -0.561099
+ − v 0.353969 1.695493 -0.003248
+ − v 1.619020 0.252870 0.561099
+ − v 0.156445 -0.619376 1.609937
+ − v -1.108605 0.823246 1.045591
+ − usemtl (null)
+ − usemtl (null)
+ − s off
+ − f 5 1 8
+ − f 1 4 8
+ − f 3 7 8
+ − f 3 8 4
+ − f 2 6 3
+ − f 6 7 3
+ − f 1 5 2
+ − f 5 6 2
+ − f 5 8 7
+ − f 5 7 6
+ − f 1 2 3
+ − f 1 3 4