Adding mesh cropping snippet

snippets/mesh_cropping.py

@@ -0,0 +1,28 @@
+import numpy as np
+import open3d as o3d
+import os
+
+MESH_SOURCE_DIR = ""
+MESH_OUTPUT_DIR = ""
+
+
+def crop(mesh_filename: str, gender: str):
+    mesh = o3d.io.read_triangle_mesh(os.path.join(MESH_SOURCE_DIR, gender, mesh_filename))
+
+    obb = mesh.get_oriented_bounding_box()
+
+    extents = np.asarray(obb . extent)
+    major_axis_index = np.argmax(extents)
+    major_axis_extent = extents[major_axis_index]
+
+    cropped_extent = extents.copy()
+    cropped_extent[major_axis_index] /= 3
+
+    cropped_center = obb.center + obb.R[:, major_axis_index] * (major_axis_extent / 3)
+
+    cropped_obb = o3d.geometry.OrientedBoundingBox(cropped_center, obb .R, cropped_extent)
+    proximal_mesh = mesh.crop(cropped_obb)
+    proximal_mesh.compute_vertex_normals()
+
+    o3d.visualization.draw_geometries([proximal_mesh])
+    o3d.io.write_triangle_mesh(mesh=proximal_mesh, filename=os.path.join(MESH_OUTPUT_DIR, gender, mesh_filename))