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#!/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.add_argument('--float_colors', action='store_true', help='pass if RGB colors are floats, not ints, in the obj')
@click.add_argument('--unwind', action='store_true', help='pass to reverse winding order on faces (if surface normals are upside down)')
@click.add_argument('--flip_y', action='store_true', help='flip Y axis')
@click.add_argument('-i', '--input_fn', required=True, help='input OBJ filename')
@click.add_argument('-o', '--output_fn', help='output PLY filename')
@click.pass_context
def cli(ctx, float_colors, unwind, flip_y, 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 flip_y:
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")
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