import struct
from pathlib import Path
[docs]
def export_surface_to_obj(surface_data, output_file: Path):
"""Export a triangulated surface to an OBJ file.
.. todo:: Implement the export_surface_to_obj function
Args:
surface_data: The data representing the surface.
output_file (Path): The output OBJ file path.
"""
with open(output_file, 'w') as f:
# Write vertices
for vertex in surface_data['vertices']:
f.write(f"v {vertex[0]} {vertex[1]} {vertex[2]}\n")
# Write faces
for face in surface_data['faces']:
f.write(f"f {face[0]} {face[1]} {face[2]}\n")
[docs]
def export_surface_to_ply_ascii(surface_data, output_file: Path):
"""Export a triangulated surface to an ASCII PLY file.
.. todo:: Implement the export_surface_to_ply_ascii function
Args:
surface_data: The data representing the surface.
output_file (Path): The output PLY file path.
"""
with open(output_file, 'w') as f:
f.write("ply\n")
f.write("format ascii 1.0\n")
f.write(f"element vertex {len(surface_data['vertices'])}\n")
f.write("property float x\nproperty float y\nproperty float z\n")
f.write(f"element face {len(surface_data['faces'])}\n")
f.write("property list uchar int vertex_indices\n")
f.write("end_header\n")
for vertex in surface_data['vertices']:
f.write(f"{vertex[0]} {vertex[1]} {vertex[2]}\n")
for face in surface_data['faces']:
f.write(f"3 {face[0]} {face[1]} {face[2]}\n")
[docs]
def export_surface_to_ply_binary(surface_data, output_file: Path):
"""Export a triangulated surface to a binary PLY file.
.. todo:: Implement the export_surface_to_ply_binary function
Args:
surface_data: The data representing the surface.
output_file (Path): The output PLY file path.
"""
with open(output_file, 'wb') as f:
f.write(b"ply\n")
f.write(b"format binary_little_endian 1.0\n")
f.write(f"element vertex {len(surface_data['vertices'])}\n".encode())
f.write(b"property float x\nproperty float y\nproperty float z\n")
f.write(f"element face {len(surface_data['faces'])}\n".encode())
f.write(b"property list uchar int vertex_indices\n")
f.write(b"end_header\n")
for vertex in surface_data['vertices']:
f.write(bytearray(struct.pack('fff', *vertex)))
for face in surface_data['faces']:
f.write(bytearray(struct.pack('Biii', 3, *face)))