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# Hunyuan 3D is licensed under the TENCENT HUNYUAN NON-COMMERCIAL LICENSE AGREEMENT
# except for the third-party components listed below.
# Hunyuan 3D does not impose any additional limitations beyond what is outlined
# in the repsective licenses of these third-party components.
# Users must comply with all terms and conditions of original licenses of these third-party
# components and must ensure that the usage of the third party components adheres to
# all relevant laws and regulations.
# For avoidance of doubts, Hunyuan 3D means the large language models and
# their software and algorithms, including trained model weights, parameters (including
# optimizer states), machine-learning model code, inference-enabling code, training-enabling code,
# fine-tuning enabling code and other elements of the foregoing made publicly available
# by Tencent in accordance with TENCENT HUNYUAN COMMUNITY LICENSE AGREEMENT.
import os
import tempfile
from typing import Union
import numpy as np
import pymeshlab
import torch
import trimesh
def load_mesh(path):
if path.endswith(".glb"):
mesh = trimesh.load(path)
else:
mesh = pymeshlab.MeshSet()
mesh.load_new_mesh(path)
return mesh
def reduce_face(mesh: pymeshlab.MeshSet, max_facenum: int = 200000):
if max_facenum > mesh.current_mesh().face_number():
return mesh
mesh.apply_filter(
"meshing_decimation_quadric_edge_collapse",
targetfacenum=max_facenum,
qualitythr=1.0,
preserveboundary=True,
boundaryweight=3,
preservenormal=True,
preservetopology=True,
autoclean=True,
)
return mesh
def remove_floater(mesh: pymeshlab.MeshSet):
mesh.apply_filter(
"compute_selection_by_small_disconnected_components_per_face", nbfaceratio=0.005
)
mesh.apply_filter("compute_selection_transfer_face_to_vertex", inclusive=False)
mesh.apply_filter("meshing_remove_selected_vertices_and_faces")
return mesh
def pymeshlab2trimesh(mesh: pymeshlab.MeshSet):
with tempfile.NamedTemporaryFile(suffix=".ply", delete=False) as temp_file:
mesh.save_current_mesh(temp_file.name)
mesh = trimesh.load(temp_file.name)
# 检查加载的对象类型
if isinstance(mesh, trimesh.Scene):
combined_mesh = trimesh.Trimesh()
# 如果是Scene，遍历所有的geometry并合并
for geom in mesh.geometry.values():
combined_mesh = trimesh.util.concatenate([combined_mesh, geom])
mesh = combined_mesh
return mesh
def trimesh2pymeshlab(mesh: trimesh.Trimesh):
with tempfile.NamedTemporaryFile(suffix=".ply", delete=False) as temp_file:
if isinstance(mesh, trimesh.scene.Scene):
for idx, obj in enumerate(mesh.geometry.values()):
if idx == 0:
temp_mesh = obj
else:
temp_mesh = temp_mesh + obj
mesh = temp_mesh
mesh.export(temp_file.name)
mesh = pymeshlab.MeshSet()
mesh.load_new_mesh(temp_file.name)
return mesh
def import_mesh(
mesh: Union[pymeshlab.MeshSet, trimesh.Trimesh, str],
) -> pymeshlab.MeshSet:
if isinstance(mesh, str):
mesh = load_mesh(mesh)
if isinstance(mesh, (trimesh.Trimesh, trimesh.scene.Scene)):
mesh = trimesh2pymeshlab(mesh)
return mesh
def export_mesh(input, output):
if isinstance(input, pymeshlab.MeshSet):
mesh = output
else:
mesh = pymeshlab2trimesh(output)
return mesh
class FaceReducer:
def __call__(
self,
mesh: Union[pymeshlab.MeshSet, trimesh.Trimesh, str],
max_facenum: int = 40000,
) -> Union[pymeshlab.MeshSet, trimesh.Trimesh]:
ms = import_mesh(mesh)
ms = reduce_face(ms, max_facenum=max_facenum)
mesh = export_mesh(mesh, ms)
return mesh
class FloaterRemover:
def __call__(
self,
mesh: Union[pymeshlab.MeshSet, trimesh.Trimesh, str],
) -> Union[pymeshlab.MeshSet, trimesh.Trimesh]:
ms = import_mesh(mesh)
ms = remove_floater(ms)
mesh = export_mesh(mesh, ms)
return mesh
class DegenerateFaceRemover:
def __call__(
self,
mesh: Union[pymeshlab.MeshSet, trimesh.Trimesh, str],
) -> Union[pymeshlab.MeshSet, trimesh.Trimesh]:
ms = import_mesh(mesh)
with tempfile.NamedTemporaryFile(suffix=".ply", delete=False) as temp_file:
ms.save_current_mesh(temp_file.name)
ms = pymeshlab.MeshSet()
ms.load_new_mesh(temp_file.name)
mesh = export_mesh(mesh, ms)
return mesh
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