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# Copyright (c) 2023, ETH Zurich and UNC Chapel Hill.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
# its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# This script merges multiple homogeneous PLY files into a single PLY file.
import os
import glob
import argparse
import numpy as np
import plyfile
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument("--folder_path", required=True)
parser.add_argument("--merged_path", required=True)
args = parser.parse_args()
return args
def main():
args = parse_args()
files = []
for file_name in os.listdir(args.folder_path):
if len(file_name) < 4 or file_name[-4:].lower() != ".ply":
continue
print("Reading file", file_name)
file = plyfile.PlyData.read(os.path.join(args.folder_path, file_name))
for element in file.elements:
files.append(element.data)
print("Merging files")
merged_file = np.concatenate(files, -1)
merged_el = plyfile.PlyElement.describe(merged_file, "vertex")
print("Writing merged file")
plyfile.PlyData([merged_el]).write(args.merged_path)
if __name__ == "__main__":
main()
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