def __init__(self, root: str, cache_dir: str, categories: list = ['chair'], train: bool = True,
split: float = .7, resolutions=[128, 32], no_progress: bool = False):
self.root = Path(root)
self.cache_dir = Path(cache_dir) / 'voxels'
self.cache_transforms = {}
self.params = {
'resolutions': resolutions,
}
mesh_dataset = ShapeNet_Meshes(root=root,
categories=categories,
train=train,
split=split,
no_progress=no_progress)
self.names = mesh_dataset.names
self.synset_idxs = mesh_dataset.synset_idxs
self.synsets = mesh_dataset.synsets
self.labels = mesh_dataset.labels
for res in self.params['resolutions']:
self.cache_transforms[res] = tfs.CacheCompose([
tfs.TriangleMeshToVoxelGrid(res, normalize=False, vertex_offset=0.5),
tfs.FillVoxelGrid(thresh=0.5),
tfs.ExtractProjectOdmsFromVoxelGrid()
], self.cache_dir)
desc = 'converting to voxels'
for idx in tqdm(range(len(mesh_dataset)), desc=desc, disable=no_progress):
name = mesh_dataset.names[idx]
if name not in self.cache_transforms[res].cached_ids:
sample = mesh_dataset[idx]
mesh = TriangleMesh.from_tensors(sample['data']['vertices'],
sample['data']['faces'])
self.cache_transforms[res](name, mesh)
def __init__(self, root: str, cache_dir: str, categories: list = ['chair'], train: bool = True,
split: float = .7, resolution: int = 100, smoothing_iterations: int = 3, mode='Tri',
no_progress: bool = False):
assert mode in ['Tri', 'Quad']
self.root = Path(root)
self.cache_dir = Path(cache_dir) / 'surface_meshes'
dataset_params = {
'root': root,
'categories': categories,
'train': train,
'split': split,
'no_progress': no_progress,
}
self.params = {
'resolution': resolution,
'smoothing_iterations': smoothing_iterations,
'mode': mode,
}
mesh_dataset = ShapeNet_Meshes(**dataset_params)
voxel_dataset = ShapeNet_Voxels(**dataset_params, cache_dir=cache_dir, resolutions=[resolution])
combined_dataset = ShapeNet_Combination([mesh_dataset, voxel_dataset])
self.names = combined_dataset.names
self.synset_idxs = combined_dataset.synset_idxs
self.synsets = combined_dataset.synsets
self.labels = combined_dataset.labels
if mode == 'Tri':
mesh_conversion = tfs.VoxelGridToTriangleMesh(threshold=0.5,
mode='marching_cubes',
normalize=False)
else:
mesh_conversion = tfs.VoxelGridToQuadMesh(threshold=0.5,
normalize=False)
def convert(og_mesh, voxel):
transforms = tfs.Compose([mesh_conversion,
tfs.MeshLaplacianSmoothing(smoothing_iterations)])
new_mesh = transforms(voxel)
new_mesh.vertices = pcfunc.realign(new_mesh.vertices, og_mesh.vertices)
return {'vertices': new_mesh.vertices, 'faces': new_mesh.faces}
self.cache_convert = helpers.Cache(convert, self.cache_dir,
cache_key=helpers._get_hash(self.params))
desc = 'converting to surface meshes'
for idx in tqdm(range(len(combined_dataset)), desc=desc, disable=no_progress):
name = combined_dataset.names[idx]
if name not in self.cache_convert.cached_ids:
sample = combined_dataset[idx]
voxel = sample['data'][str(resolution)]
og_mesh = TriangleMesh.from_tensors(sample['data']['vertices'],
sample['data']['faces'])
self.cache_convert(name, og_mesh=og_mesh, voxel=voxel)
def __call__(self, voxel: Type[VoxelGrid]):
"""
Args:
voxel (torch.Tensor): Voxel grid.
Returns:
(TriangleMesh): Converted triangle mesh.
"""
verts, faces = cvt.voxelgrid_to_trianglemesh(voxel, self.thresh, self.mode, self.normalize)
return TriangleMesh.from_tensors(vertices=verts, faces=faces)
def __call__(self, sdf: Callable):
"""
Args:
sdf (Callable): An object with a .eval_occ function which indicates
which of a set of passed points is inside the surface.
Returns:
(TriangleMesh): Computed triangle mesh.
"""
verts, faces = cvt.sdf_to_trianglemesh(sdf, self.bbox_center, self.bbox_dim,
self.resolution, self.upsampling_steps)
return TriangleMesh.from_tensors(vertices=verts, faces=faces)
def __init__(self, root: str, cache_dir: str, categories: list = ['chair'], train: bool = True,
split: float = .7, resolution: int = 100, num_points: int = 5000, occ: bool = False,
smoothing_iterations: int = 3, sample_box=True, no_progress: bool = False):
self.root = Path(root)
self.cache_dir = Path(cache_dir) / 'sdf_points'
self.params = {
'resolution': resolution,
'num_points': num_points,
'occ': occ,
'smoothing_iterations': smoothing_iterations,
'sample_box': sample_box,
}
surface_mesh_dataset = ShapeNet_Surface_Meshes(root=root,
cache_dir=cache_dir,
categories=categories,
train=train,
split=split,
resolution=resolution,
smoothing_iterations=smoothing_iterations,
no_progress=no_progress)
self.names = surface_mesh_dataset.names
self.synset_idxs = surface_mesh_dataset.synset_idxs
self.synsets = surface_mesh_dataset.synsets
self.labels = surface_mesh_dataset.labels
def convert(mesh):
sdf = mesh_cvt.trianglemesh_to_sdf(mesh, num_points)
bbox_true = torch.stack((mesh.vertices.min(dim=0)[0],
mesh.vertices.max(dim=0)[0]), dim=1).view(-1)
points = 1.05 * (torch.rand(self.params['num_points'], 3).to(mesh.vertices.device) - .5)
distances = sdf(points)
return {'points': points, 'distances': distances, 'bbox': bbox_true}
self.cache_convert = helpers.Cache(convert, self.cache_dir,
cache_key=helpers._get_hash(self.params))
desc = 'converting to sdf points'
for idx in tqdm(range(len(surface_mesh_dataset)), desc=desc, disable=no_progress):
name = surface_mesh_dataset.names[idx]
if name not in self.cache_convert.cached_ids:
idx = surface_mesh_dataset.names.index(name)
sample = surface_mesh_dataset[idx]
mesh = TriangleMesh.from_tensors(sample['data']['vertices'],
sample['data']['faces'])
# Use cuda if available to speed up conversion
if torch.cuda.is_available():
mesh.cuda()
self.cache_convert(name, mesh=mesh)
def __init__(self, root: str, cache_dir: str, categories: list = ['chair'], train: bool = True,
split: float = .7, num_points: int = 5000, smoothing_iterations=3,
surface=True, resolution=100, normals=True, no_progress: bool = False):
self.root = Path(root)
self.cache_dir = Path(cache_dir) / 'points'
dataset_params = {
'root': root,
'categories': categories,
'train': train,
'split': split,
'no_progress': no_progress,
}
self.params = {
'num_points': num_points,
'smoothing_iterations': smoothing_iterations,
'surface': surface,
'resolution': resolution,
'normals': normals,
}
if surface:
dataset = ShapeNet_Surface_Meshes(**dataset_params,
cache_dir=cache_dir,
resolution=resolution,
smoothing_iterations=smoothing_iterations)
else:
dataset = ShapeNet_Meshes(**dataset_params)
self.names = dataset.names
self.synset_idxs = dataset.synset_idxs
self.synsets = dataset.synsets
self.labels = dataset.labels
def convert(mesh):
points, face_choices = mesh_cvt.trianglemesh_to_pointcloud(mesh, num_points)
face_normals = mesh.compute_face_normals()
point_normals = face_normals[face_choices]
return {'points': points, 'normals': point_normals}
self.cache_convert = helpers.Cache(convert, self.cache_dir,
cache_key=helpers._get_hash(self.params))
desc = 'converting to points'
for idx in tqdm(range(len(dataset)), desc=desc, disable=no_progress):
name = dataset.names[idx]
if name not in self.cache_convert.cached_ids:
idx = dataset.names.index(name)
sample = dataset[idx]
mesh = TriangleMesh.from_tensors(sample['data']['vertices'],
sample['data']['faces'])
self.cache_convert(name, mesh=mesh)
def _read(self, fpath):
data = np.load(fpath)
if 'vertices' in data and 'faces' in data:
verts = torch.from_numpy(data['vertices'])
faces = torch.from_numpy(data['faces'])
if data['faces'].shape[-1] == 4:
data = QuadMesh.from_tensors(verts, faces)
else:
data = TriangleMesh.from_tensors(verts, faces)
else:
data = torch.from_numpy(data['arr_0'])
return data
def __getitem__(self, index):
"""Returns the item at index idx. """
data = dict()
attributes = dict()
name = self.names[index]
synset_idx = self.synset_idxs[index]
data = self.cache_convert(name)
mesh = TriangleMesh.from_tensors(data['vertices'], data['faces'])
data['adj'] = mesh.compute_adjacency_matrix_sparse().coalesce()
attributes['name'] = name
attributes['synset'] = self.synsets[synset_idx]
attributes['label'] = self.labels[synset_idx]
return {'data': data, 'attributes': attributes}
def _read(self, fpath):
data = np.load(fpath)
if 'vertices' in data and 'faces' in data:
verts = torch.from_numpy(data['vertices'])
faces = torch.from_numpy(data['faces'])
if data['faces'].shape[-1] == 4:
data = QuadMesh.from_tensors(verts, faces)
else:
data = TriangleMesh.from_tensors(verts, faces)
elif 'format' in data:
matrix_format = data['format'].item()
sparse = scipy.sparse.csc_matrix(
(data['data'], data['indices'], data['indptr']), data['shape'])
data = torch.from_numpy(sparse.todense())
res = data.size(0)
data = data.reshape(res, res, res)
else:
data = torch.from_numpy(data['arr_0'])
return data