Spaces:
Running
on
Zero
Running
on
Zero
File size: 2,480 Bytes
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import numpy as np
def load_obj(filename):
# Read entire file
with open(filename, 'r') as f:
lines = f.readlines()
# load vertices
vertices, texcoords = [], []
for line in lines:
if len(line.split()) == 0:
continue
prefix = line.split()[0].lower()
if prefix == 'v':
vertices.append([float(v) for v in line.split()[1:]])
elif prefix == 'vt':
val = [float(v) for v in line.split()[1:]]
texcoords.append([val[0], 1.0 - val[1]])
uv = len(texcoords) > 0
faces, tfaces = [], []
for line in lines:
if len(line.split()) == 0:
continue
prefix = line.split()[0].lower()
if prefix == 'usemtl': # Track used materials
pass
elif prefix == 'f': # Parse face
vs = line.split()[1:]
nv = len(vs)
vv = vs[0].split('/')
v0 = int(vv[0]) - 1
if uv:
t0 = int(vv[1]) - 1 if vv[1] != "" else -1
for i in range(nv - 2): # Triangulate polygons
vv1 = vs[i + 1].split('/')
v1 = int(vv1[0]) - 1
vv2 = vs[i + 2].split('/')
v2 = int(vv2[0]) - 1
faces.append([v0, v1, v2])
if uv:
t1 = int(vv1[1]) - 1 if vv1[1] != "" else -1
t2 = int(vv2[1]) - 1 if vv2[1] != "" else -1
tfaces.append([t0, t1, t2])
vertices = np.array(vertices, dtype=np.float32)
faces = np.array(faces, dtype=np.int64)
if uv:
assert len(tfaces) == len(faces)
texcoords = np.array(texcoords, dtype=np.float32)
tfaces = np.array(tfaces, dtype=np.int64)
else:
texcoords, tfaces = None, None
return vertices, faces, texcoords, tfaces
def write_obj(filename, v_pos, t_pos_idx, v_tex, t_tex_idx):
with open(filename, "w") as f:
for v in v_pos:
f.write('v {} {} {} \n'.format(v[0], v[1], v[2]))
if v_tex is not None:
assert(len(t_pos_idx) == len(t_tex_idx))
for v in v_tex:
f.write('vt {} {} \n'.format(v[0], 1.0 - v[1]))
# Write faces
for i in range(len(t_pos_idx)):
f.write("f ")
for j in range(3):
f.write(' %s/%s' % (str(t_pos_idx[i][j]+1), '' if v_tex is None else str(t_tex_idx[i][j]+1)))
f.write("\n")
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