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ch3ll0v3k/reduce_faces.py

Forked from awesomebytes/reduce_faces.py
Created October 24, 2022 16:51
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  1. Sammy Pfeiffer created this gist Apr 6, 2016.
    92 changes: 92 additions & 0 deletions reduce_faces.py
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,92 @@
    #!/usr/bin/env python

    import sys
    import os
    import subprocess

    # Script taken from doing the needed operation
    # (Filters > Remeshing, Simplification and Reconstruction >
    # Quadric Edge Collapse Decimation, with parameters:
    # 0.9 percentage reduction (10%), 0.3 Quality threshold (70%)
    # Target number of faces is ignored with those parameters
    # conserving face normals, planar simplification and
    # post-simplimfication cleaning)
    # And going to Filter > Show current filter script
    filter_script_mlx = """<!DOCTYPE FilterScript>
    <FilterScript>
    <filter name="Quadric Edge Collapse Decimation">
    <Param type="RichInt" value="1448" name="TargetFaceNum"/>
    <Param type="RichFloat" value="0.9" name="TargetPerc"/>
    <Param type="RichFloat" value="0.3" name="QualityThr"/>
    <Param type="RichBool" value="false" name="PreserveBoundary"/>
    <Param type="RichFloat" value="1" name="BoundaryWeight"/>
    <Param type="RichBool" value="true" name="PreserveNormal"/>
    <Param type="RichBool" value="false" name="PreserveTopology"/>
    <Param type="RichBool" value="false" name="OptimalPlacement"/>
    <Param type="RichBool" value="true" name="PlanarQuadric"/>
    <Param type="RichBool" value="false" name="QualityWeight"/>
    <Param type="RichBool" value="true" name="AutoClean"/>
    <Param type="RichBool" value="false" name="Selected"/>
    </filter>
    </FilterScript>
    """


    def create_tmp_filter_file(filename='filter_file_tmp.mlx'):
    with open('/tmp/' + filename, 'w') as f:
    f.write(filter_script_mlx)
    return '/tmp/' + filename


    def reduce_faces(in_file, out_file,
    filter_script_path=create_tmp_filter_file()):
    # Add input mesh
    command = "meshlabserver -i " + in_file
    # Add the filter script
    command += " -s " + filter_script_path
    # Add the output filename and output flags
    command += " -o " + out_file + " -om vn fn"
    # Execute command
    print "Going to execute: " + command
    output = subprocess.check_output(command, shell=True)
    last_line = output.splitlines()[-1]
    print
    print "Done:"
    print in_file + " > " + out_file + ": " + last_line


    if __name__ == '__main__':
    if len(sys.argv) < 3:
    print "Usage:"
    print sys.argv[0] + " /path/to/input_mesh num_iterations"
    print "For example, reduce 10 times:"
    print sys.argv[0] + " /home/myuser/mymesh.dae 10"
    exit(0)

    in_mesh = sys.argv[1]
    filename = in_mesh.split('/')[-1]
    num_iterations = int(sys.argv[2])

    folder_name = filename.replace('.', '_')
    tmp_folder_name = '/tmp/' + folder_name + '_meshes/'

    print "Input mesh: " + in_mesh + " (filename: " + filename + ")"
    print "Num iterations: " + str(num_iterations)
    print "Output folder: " + tmp_folder_name
    try:
    os.mkdir(tmp_folder_name)
    except OSError as e:
    print >> sys.stderr, "Exception creating folder for meshes: " + str(e)
    exit(0)
    for it in range(1, num_iterations):
    if it == 1:
    out_mesh = tmp_folder_name + folder_name + "_it" + str(it) + ".dae"
    reduce_faces(in_mesh, out_mesh)
    else:
    out_mesh = tmp_folder_name + folder_name + "_it" + str(it) + ".dae"
    reduce_faces(last_out_mesh, out_mesh)
    last_out_mesh = out_mesh

    print
    print "Done reducing, find the files at: " + tmp_folder_name