Spaces:
Running
on
Zero
Running
on
Zero
| 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") | |