1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#!/usr/bin/python
"""
Convert an OBJ 3D model (with vertex color) to a PLY file, which can be read by the draco_encoder.
"""
import click
@click.command()
@click.option('-c', '--float_colors/--int_colors', 'float_colors', default=False, help='pass if RGB colors are floats, not ints, in the obj')
@click.option('-u', '--unwind/--wind', 'unwind', default=False, help='pass to reverse winding order on faces (if surface normals are upside down)')
@click.option('-y', '--flip_y/--no_flip_y', 'flip_y', default=False, help='flip Y axis')
@click.option('-z', '--flip_z/--no_flip_z', 'flip_z', default=False, help='flip Z axis')
@click.option('-s', '--swap_xy/--no_swap_xy', 'swap_xy', default=False, help='swap x/y axes so things rotate correctly')
@click.option('-z', '--swap_xz/--no_swap_xz', 'swap_xz', default=False, help='swap x/z axes so things rotate correctly')
@click.option('-i', '--input_fn', required=True, help='input OBJ filename')
@click.option('-o', '--output_fn', help='output PLY filename')
@click.pass_context
def cli(ctx, float_colors, unwind, flip_y, flip_z, swap_xy, swap_xz, input_fn, output_fn):
"""
click command for converting OBJ to PLY
"""
ply_header = """ply
format ascii 1.0
element vertex {}
property float x
property float y
property float z
property uchar red
property uchar green
property uchar blue
element face {}
property list uchar int vertex_index
end_header
"""
if output_fn is None:
output_fn = input_fn.replace('.obj', '.ply')
with open(input_fn, 'r') as f:
i = 0
vertexes = []
faces = []
for line in f.readlines():
N = line.strip().split(' ')
if N[0] == 'v':
if swap_xy:
tmp = N[2]
N[2] = N[1]
N[1] = tmp
if flip_y:
N[2] = str(float(N[2]) * -1)
if swap_xz:
tmp = N[3]
N[3] = N[1]
N[1] = tmp
if flip_z:
N[2] = str(float(N[2]) * -1)
if float_colors:
vertexes.append([
N[1],
N[2],
N[3],
str(int(255 * float(N[4]))),
str(int(255 * float(N[5]))),
str(int(255 * float(N[6]))),
])
else:
vertexes.append(N[1:])
if N[0] == 'f':
if unwind:
faces.append([
"3",
str(int(N[3]) - 1),
str(int(N[2]) - 1),
str(int(N[1]) - 1),
])
else:
faces.append([
"3",
str(int(N[1]) - 1),
str(int(N[2]) - 1),
str(int(N[3]) - 1),
])
with open(output_fn, 'w') as out_file:
out_file.write(ply_header.format(len(vertexes), len(faces)))
for v in vertexes:
out_file.write(" ".join(v) + "\n")
for f in faces:
out_file.write(" ".join(f) + "\n")
|
