Upload merge_fragments.py

Script to conduct optional merging of fragments into original post-subtraction broken/repair mesh model

merge_fragments.py

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+import os
+import glob
+import sys
+import trimesh
+
+# Helper script for optional merging
+# of fragments into the original
+# broken/repair meshes
+#
+# Call this as 
+#
+# 	python3 merge_fragments.py [outfilepath]"
+#
+# where outfilepath is the full path to the mesh (model_x_[N].ply)
+# x is either b for the broken mesh or r for the repair mesh
+# N is a number from 0 to N_max, corresponding to the number of 
+# subtractions performed (N_max is 3 for jars and bottles, 10 for mugs,
+# and 1 for other classes
+#
+# The script searches for all fragments corresponding to model_x_[N].ply,
+# i.e., all files of the form model_x_[N]_fragment_[M].ply, where M = {0,1,2...}
+# and merges them using the 'trimesh' package
+#
+# Example: 
+#	python3 merge_fragments.py ./03593526/e4c871d1d5e3c49844b2fa2cac0778f5/models/model_b_1.ply
+# 
+# THE FOLLOWING PACKAGE MUST BE PRE-INSTALLED PRIOR TO USING THIS SCRIPT: trimesh
+#
+# Author: Natasha Kholgade Banerjee
+
+def merge_fragments_runner( outfilepath ):
+	
+	# Search for all fragments
+	fragmentfiles = glob.glob( outfilepath.replace( ".ply", "_fragment_*.ply" ) )
+	if not fragmentfiles:
+		print( f"No fragments found for {outfilepath}" )
+	else:
+		print( "Merging following fragment files found for {outfilepath}:" )
+		print( fragmentfiles )
+		
+		# Load in all the fragment files as trimesh meshes
+		meshes = [trimesh.load( fragmentfile ) for fragmentfile in fragmentfiles]
+		
+		# Concatenate all meshes into a single mesh using the concatenate function in trimesh
+		mesh = trimesh.util.concatenate( meshes )
+		
+		# Export the concatenated mesh to {outfilepath}
+		mesh.export( outfilepath )
+
+if __name__ == "__main__":
+	if len(sys.argv) != 2:
+		print("Usage: python3 merge_fragments.py [outfilepath]")
+		print( "Example: python3 merge_fragments.py ./03593526/e4c871d1d5e3c49844b2fa2cac0778f5/models/model_b_1.ply")
+	else:
+		outfilepath = sys.argv[1]
+		merge_fragments_runner( outfilepath )