def read(
self,
path: PathOrStr,
include_textures: bool,
device,
path_manager: PathManager,
**kwargs,
) -> Optional[Meshes]:
if not endswith(path, self.known_suffixes):
return None
with _open_file(path, path_manager, "rb") as f:
data = _load_off_stream(f)
verts = torch.from_numpy(data["verts"]).to(device)
if "faces" in data:
faces = torch.from_numpy(data["faces"]).to(dtype=torch.int64,
device=device)
else:
faces = torch.zeros((0, 3), dtype=torch.int64, device=device)
textures = None
if "verts_colors" in data:
if "faces_colors" in data:
msg = "Faces colors ignored because vertex colors provided too."
warnings.warn(msg)
verts_colors = torch.from_numpy(data["verts_colors"]).to(device)
textures = TexturesVertex([verts_colors])
elif "faces_colors" in data:
faces_colors = torch.from_numpy(data["faces_colors"]).to(device)
textures = TexturesAtlas([faces_colors[:, None, None, :]])
mesh = Meshes(verts=[verts.to(device)],
faces=[faces.to(device)],
textures=textures)
return mesh
def shapenet_models(params, index: int = 0):
"""Generator of shapenet models
"""
model_path = "models/model_normalized.obj"
synset = params.synsets[params.category]
model_list = os.listdir(join(params.shapenet_path, synset))
model_paths = [
join(params.shapenet_path, synset, c, model_path) for c in model_list
]
for num, path in enumerate(model_paths):
try:
verts, faces, aux = load_obj(path,
load_textures=True,
create_texture_atlas=True)
mesh = Meshes(
verts=[verts],
faces=[faces.verts_idx],
textures=TexturesAtlas(atlas=[aux.texture_atlas]),
).to(device)
print(f"Adding mesh num {num}: {model_list[num]} ")
yield mesh, model_list[num]
except Exception as e:
# car_exclude_pytorch3d.append(car_list[num])
print(e, model_list[num])
continue
def load_objs_as_meshes(
files: list,
device=None,
load_textures: bool = True,
create_texture_atlas: bool = False,
texture_atlas_size: int = 4,
texture_wrap: Optional[str] = "repeat",
path_manager: Optional[PathManager] = None,
):
"""
Load meshes from a list of .obj files using the load_obj function, and
return them as a Meshes object. This only works for meshes which have a
single texture image for the whole mesh. See the load_obj function for more
details. material_colors and normals are not stored.
Args:
files: A list of file-like objects (with methods read, readline, tell,
and seek), pathlib paths or strings containing file names.
device: Desired device of returned Meshes. Default:
uses the current device for the default tensor type.
load_textures: Boolean indicating whether material files are loaded
create_texture_atlas, texture_atlas_size, texture_wrap: as for load_obj.
path_manager: optionally a PathManager object to interpret paths.
Returns:
New Meshes object.
"""
mesh_list = []
for f_obj in files:
verts, faces, aux = load_obj(
f_obj,
load_textures=load_textures,
create_texture_atlas=create_texture_atlas,
texture_atlas_size=texture_atlas_size,
texture_wrap=texture_wrap,
path_manager=path_manager,
)
tex = None
if create_texture_atlas:
# TexturesAtlas type
tex = TexturesAtlas(atlas=[aux.texture_atlas.to(device)])
else:
# TexturesUV type
tex_maps = aux.texture_images
if tex_maps is not None and len(tex_maps) > 0:
verts_uvs = aux.verts_uvs.to(device) # (V, 2)
faces_uvs = faces.textures_idx.to(device) # (F, 3)
image = list(tex_maps.values())[0].to(device)[None]
tex = TexturesUV(verts_uvs=[verts_uvs],
faces_uvs=[faces_uvs],
maps=image)
mesh = Meshes(verts=[verts.to(device)],
faces=[faces.verts_idx.to(device)],
textures=tex)
mesh_list.append(mesh)
if len(mesh_list) == 1:
return mesh_list[0]
return join_meshes_as_batch(mesh_list)
def test_join_meshes_as_batch(self):
"""
Test that join_meshes_as_batch and load_objs_as_meshes are consistent
with single meshes.
"""
def check_triple(mesh, mesh3):
"""
Verify that mesh3 is three copies of mesh.
"""
def check_item(x, y):
self.assertEqual(x is None, y is None)
if x is not None:
self.assertClose(torch.cat([x, x, x]), y)
check_item(mesh.verts_padded(), mesh3.verts_padded())
check_item(mesh.faces_padded(), mesh3.faces_padded())
if mesh.textures is not None:
if isinstance(mesh.textures, TexturesUV):
check_item(
mesh.textures.faces_uvs_padded(),
mesh3.textures.faces_uvs_padded(),
)
check_item(
mesh.textures.verts_uvs_padded(),
mesh3.textures.verts_uvs_padded(),
)
check_item(mesh.textures.maps_padded(),
mesh3.textures.maps_padded())
elif isinstance(mesh.textures, TexturesVertex):
check_item(
mesh.textures.verts_features_padded(),
mesh3.textures.verts_features_padded(),
)
elif isinstance(mesh.textures, TexturesAtlas):
check_item(mesh.textures.atlas_padded(),
mesh3.textures.atlas_padded())
DATA_DIR = Path(
__file__).resolve().parent.parent / "docs/tutorials/data"
obj_filename = DATA_DIR / "cow_mesh/cow.obj"
mesh = load_objs_as_meshes([obj_filename])
mesh3 = load_objs_as_meshes([obj_filename, obj_filename, obj_filename])
check_triple(mesh, mesh3)
self.assertTupleEqual(mesh.textures.maps_padded().shape,
(1, 1024, 1024, 3))
# Try mismatched texture map sizes, which needs a call to interpolate()
mesh2048 = mesh.clone()
maps = mesh.textures.maps_padded()
mesh2048.textures._maps_padded = torch.cat([maps, maps], dim=1)
join_meshes_as_batch([mesh.to("cuda:0"), mesh2048.to("cuda:0")])
mesh_notex = load_objs_as_meshes([obj_filename], load_textures=False)
mesh3_notex = load_objs_as_meshes(
[obj_filename, obj_filename, obj_filename], load_textures=False)
check_triple(mesh_notex, mesh3_notex)
self.assertIsNone(mesh_notex.textures)
# meshes with vertex texture, join into a batch.
verts = torch.randn((4, 3), dtype=torch.float32)
faces = torch.tensor([[2, 1, 0], [3, 1, 0]], dtype=torch.int64)
vert_tex = torch.ones_like(verts)
rgb_tex = TexturesVertex(verts_features=[vert_tex])
mesh_rgb = Meshes(verts=[verts], faces=[faces], textures=rgb_tex)
mesh_rgb3 = join_meshes_as_batch([mesh_rgb, mesh_rgb, mesh_rgb])
check_triple(mesh_rgb, mesh_rgb3)
# meshes with texture atlas, join into a batch.
device = "cuda:0"
atlas = torch.rand((2, 4, 4, 3), dtype=torch.float32, device=device)
atlas_tex = TexturesAtlas(atlas=[atlas])
mesh_atlas = Meshes(verts=[verts], faces=[faces], textures=atlas_tex)
mesh_atlas3 = join_meshes_as_batch(
[mesh_atlas, mesh_atlas, mesh_atlas])
check_triple(mesh_atlas, mesh_atlas3)
# Test load multiple meshes with textures into a batch.
teapot_obj = DATA_DIR / "teapot.obj"
mesh_teapot = load_objs_as_meshes([teapot_obj])
teapot_verts, teapot_faces = mesh_teapot.get_mesh_verts_faces(0)
mix_mesh = load_objs_as_meshes([obj_filename, teapot_obj],
load_textures=False)
self.assertEqual(len(mix_mesh), 2)
self.assertClose(mix_mesh.verts_list()[0], mesh.verts_list()[0])
self.assertClose(mix_mesh.faces_list()[0], mesh.faces_list()[0])
self.assertClose(mix_mesh.verts_list()[1], teapot_verts)
self.assertClose(mix_mesh.faces_list()[1], teapot_faces)
cow3_tea = join_meshes_as_batch([mesh3, mesh_teapot],
include_textures=False)
self.assertEqual(len(cow3_tea), 4)
check_triple(mesh_notex, cow3_tea[:3])
self.assertClose(cow3_tea.verts_list()[3], mesh_teapot.verts_list()[0])
self.assertClose(cow3_tea.faces_list()[3], mesh_teapot.faces_list()[0])
# Check error raised if all meshes in the batch don't have the same texture type
with self.assertRaisesRegex(ValueError, "same type of texture"):
join_meshes_as_batch([mesh_atlas, mesh_rgb, mesh_atlas])
def test_save_load_icosphere(self):
# Test that saving a mesh as an off file and loading it results in the
# same data on the correct device, for all permitted types of textures.
# Standard test is for random colors, but also check totally white,
# because there's a different in OFF semantics between "1.0" color (=full)
# and "1" (= 1/255 color)
sphere = ico_sphere(0)
io = IO()
device = torch.device("cuda:0")
atlas_padded = torch.rand(1, sphere.faces_list()[0].shape[0], 1, 1, 3)
atlas = TexturesAtlas(atlas_padded)
atlas_padded_white = torch.ones(1,
sphere.faces_list()[0].shape[0], 1, 1,
3)
atlas_white = TexturesAtlas(atlas_padded_white)
verts_colors_padded = torch.rand(1, sphere.verts_list()[0].shape[0], 3)
vertex_texture = TexturesVertex(verts_colors_padded)
verts_colors_padded_white = torch.ones(1,
sphere.verts_list()[0].shape[0],
3)
vertex_texture_white = TexturesVertex(verts_colors_padded_white)
# No colors case
with NamedTemporaryFile(mode="w", suffix=".off") as f:
io.save_mesh(sphere, f.name)
f.flush()
mesh1 = io.load_mesh(f.name, device=device)
self.assertEqual(mesh1.device, device)
mesh1 = mesh1.cpu()
self.assertClose(mesh1.verts_padded(), sphere.verts_padded())
self.assertClose(mesh1.faces_padded(), sphere.faces_padded())
self.assertIsNone(mesh1.textures)
# Atlas case
sphere.textures = atlas
with NamedTemporaryFile(mode="w", suffix=".off") as f:
io.save_mesh(sphere, f.name)
f.flush()
mesh2 = io.load_mesh(f.name, device=device)
self.assertEqual(mesh2.device, device)
mesh2 = mesh2.cpu()
self.assertClose(mesh2.verts_padded(), sphere.verts_padded())
self.assertClose(mesh2.faces_padded(), sphere.faces_padded())
self.assertClose(mesh2.textures.atlas_padded(),
atlas_padded,
atol=1e-4)
# White atlas case
sphere.textures = atlas_white
with NamedTemporaryFile(mode="w", suffix=".off") as f:
io.save_mesh(sphere, f.name)
f.flush()
mesh3 = io.load_mesh(f.name)
self.assertClose(mesh3.textures.atlas_padded(),
atlas_padded_white,
atol=1e-4)
# TexturesVertex case
sphere.textures = vertex_texture
with NamedTemporaryFile(mode="w", suffix=".off") as f:
io.save_mesh(sphere, f.name)
f.flush()
mesh4 = io.load_mesh(f.name, device=device)
self.assertEqual(mesh4.device, device)
mesh4 = mesh4.cpu()
self.assertClose(mesh4.verts_padded(), sphere.verts_padded())
self.assertClose(mesh4.faces_padded(), sphere.faces_padded())
self.assertClose(mesh4.textures.verts_features_padded(),
verts_colors_padded,
atol=1e-4)
# white TexturesVertex case
sphere.textures = vertex_texture_white
with NamedTemporaryFile(mode="w", suffix=".off") as f:
io.save_mesh(sphere, f.name)
f.flush()
mesh5 = io.load_mesh(f.name)
self.assertClose(mesh5.textures.verts_features_padded(),
verts_colors_padded_white,
atol=1e-4)
def pred_synth(segpose,
params: Params,
mesh_type: str = "dolphin",
device: str = "cuda"):
if not params.pred_dir and not os.path.exists(params.pred_dir):
raise FileNotFoundError(
"Prediction directory has not been set or the file does not exist, please set using cli args or params"
)
pred_folders = [
join(params.pred_dir, f) for f in os.listdir(params.pred_dir)
]
count = 1
for p in sorted(pred_folders):
try:
print(p)
manager = RenderManager.from_path(p)
manager.rectify_paths(base_folder=params.pred_dir)
except FileNotFoundError:
continue
# Run Silhouette Prediction Network
logging.info(f"Starting mask predictions")
mask_priors = []
R_pred, T_pred = [], []
q_loss, t_loss = 0, 0
# Collect Translation stats
R_gt, T_gt = manager._trajectory
poses_gt = EvMaskPoseDataset.preprocess_poses(manager._trajectory)
std_T, mean_T = torch.std_mean(T_gt)
for idx in range(len(manager)):
try:
ev_frame = manager.get_event_frame(idx)
except Exception as e:
print(e)
break
mask_pred, pose_pred = predict_segpose(segpose, ev_frame,
params.threshold_conf,
params.img_size)
# mask_pred = smooth_predicted_mask(mask_pred)
manager.add_pred(idx, mask_pred, "silhouette")
mask_priors.append(torch.from_numpy(mask_pred))
# Make qexp a torch function
# q_pred = qexp(pose_pred[:, 3:])
# q_targ = qexp(poses_gt[idx, 3:].unsqueeze(0))
#### SHOULD THIS BE NORMALIZED ??
q_pred = pose_pred[:, 3:]
q_targ = poses_gt[idx, 3:]
q_pred_unit = q_pred / torch.norm(q_pred)
q_targ_unit = q_targ / torch.norm(q_targ)
# print("learnt: ", q_pred_unit, q_targ_unit)
t_pred = pose_pred[:, :3] * std_T + mean_T
t_targ = poses_gt[idx, :3] * std_T + mean_T
T_pred.append(t_pred)
q_loss += quaternion_angular_error(q_pred_unit, q_targ_unit)
t_loss += t_error(t_pred, t_targ)
r_pred = rc.quaternion_to_matrix(q_pred).unsqueeze(0)
R_pred.append(r_pred.squeeze(0))
q_loss_mean = q_loss / (idx + 1)
t_loss_mean = t_loss / (idx + 1)
# Convert R,T to world-to-view transforms --> Pytorch3d convention for the :
R_pred_abs = torch.cat(R_pred)
T_pred_abs = torch.cat(T_pred)
# Take inverse of view-to-world (output of net) to obtain w2v
wtv_trans = (get_world_to_view_transform(
R=R_pred_abs, T=T_pred_abs).inverse().get_matrix())
T_pred = wtv_trans[:, 3, :3]
R_pred = wtv_trans[:, :3, :3]
R_pred_test = look_at_rotation(T_pred_abs)
T_pred_test = -torch.bmm(R_pred_test.transpose(1, 2),
T_pred_abs[:, :, None])[:, :, 0]
# Convert back to view-to-world to get absolute
vtw_trans = (get_world_to_view_transform(
R=R_pred_test, T=T_pred_test).inverse().get_matrix())
T_pred_trans = vtw_trans[:, 3, :3]
R_pred_trans = vtw_trans[:, :3, :3]
# Calc pose error for this:
q_loss_mean_test = 0
t_loss_mean_test = 0
for idx in range(len(R_pred_test)):
q_pred_trans = rc.matrix_to_quaternion(R_pred_trans[idx]).squeeze()
q_targ = poses_gt[idx, 3:]
q_targ_unit = q_targ / torch.norm(q_targ)
# print("look: ", q_test, q_targ)
q_loss_mean_test += quaternion_angular_error(
q_pred_trans, q_targ_unit)
t_targ = poses_gt[idx, :3] * std_T + mean_T
t_loss_mean_test += t_error(T_pred_trans[idx], t_targ)
q_loss_mean_test /= idx + 1
t_loss_mean_test /= idx + 1
logging.info(
f"Mean Translation Error: {t_loss_mean}; Mean Rotation Error: {q_loss_mean}"
)
logging.info(
f"Mean Translation Error: {t_loss_mean_test}; Mean Rotation Error: {q_loss_mean_test}"
)
# Plot estimated cameras
logging.info(f"Plotting pose map")
idx = random.sample(range(len(R_gt)), k=2)
pose_plot = plot_cams_from_poses(
(R_gt[idx], T_gt[idx]), (R_pred[idx], T_pred[idx]), params.device)
pose_plot_test = plot_cams_from_poses(
(R_gt[idx], T_gt[idx]), (R_pred_test[idx], T_pred_test[idx]),
params.device)
manager.add_pose_plot(pose_plot, "rot+trans")
manager.add_pose_plot(pose_plot_test, "trans")
count += 1
groundtruth_silhouettes = manager._images("silhouette") / 255.0
print(groundtruth_silhouettes.shape)
print(torch.stack((mask_priors)).shape)
seg_iou = neg_iou_loss(groundtruth_silhouettes,
torch.stack((mask_priors)) / 255.0)
print("Seg IoU", seg_iou)
# RUN MESH DEFORMATION
# RUN MESH DEFORMATION
# Run it 3 times: w/ Rot+Trans - w/ Trans+LookAt - w/ GT Pose
experiments = {
"GT-Pose": [R_gt, T_gt],
# "Rot+Trans": [R_pred, T_pred],
# "Trans+LookAt": [R_pred_test, T_pred_test]
}
results = {}
input_m = torch.stack((mask_priors))
for i in range(len(experiments.keys())):
logging.info(
f"Input pred shape & max: {input_m.shape}, {input_m.max()}")
# The MeshDeformation model will return silhouettes across all view by default
mesh_model = MeshDeformationModel(device=device, params=params)
R, T = list(experiments.values())[i]
experiment_results = mesh_model.run_optimization(input_m, R, T)
renders = mesh_model.render_final_mesh((R, T), "predict",
input_m.shape[-2:])
mesh_silhouettes = renders["silhouettes"].squeeze(1)
mesh_images = renders["images"].squeeze(1)
experiment_name = list(experiments.keys())[i]
for idx in range(len(mesh_silhouettes)):
manager.add_pred(
idx,
mesh_silhouettes[idx].cpu().numpy(),
"silhouette",
destination=f"mesh_{experiment_name}",
)
manager.add_pred(
idx,
mesh_images[idx].cpu().numpy(),
"phong",
destination=f"mesh_{experiment_name}",
)
# Calculate chamfer loss:
mesh_pred = mesh_model._final_mesh
if mesh_type == "dolphin":
path = "data/meshes/dolphin/dolphin.obj"
mesh_gt = load_objs_as_meshes(
[path],
create_texture_atlas=False,
load_textures=True,
device=device,
)
# Shapenet Cars
elif mesh_type == "shapenet":
mesh_info = manager.metadata["mesh_info"]
path = os.path.join(
params.gt_mesh_path,
f"/ShapeNetCorev2/{mesh_info['synset_id']}/{mesh_info['mesh_id']}/models/model_normalized.obj"
)
# path = f"data/ShapeNetCorev2/{mesh_info['synset_id']}/{mesh_info['mesh_id']}/models/model_normalized.obj"
try:
verts, faces, aux = load_obj(path,
load_textures=True,
create_texture_atlas=True)
mesh_gt = Meshes(
verts=[verts],
faces=[faces.verts_idx],
textures=TexturesAtlas(atlas=[aux.texture_atlas]),
).to(device)
except:
mesh_gt = None
print("CANNOT COMPUTE CHAMFER LOSS")
if mesh_gt:
mesh_pred_compute, mesh_gt_compute = scale_meshes(
mesh_pred.clone(), mesh_gt.clone())
pcl_pred = sample_points_from_meshes(mesh_pred_compute,
num_samples=5000)
pcl_gt = sample_points_from_meshes(mesh_gt_compute,
num_samples=5000)
chamfer_loss = chamfer_distance(pcl_pred,
pcl_gt,
point_reduction="mean")
print("CHAMFER LOSS: ", chamfer_loss)
experiment_results["chamfer_loss"] = (
chamfer_loss[0].cpu().detach().numpy().tolist())
mesh_iou = neg_iou_loss(groundtruth_silhouettes, mesh_silhouettes)
experiment_results["mesh_iou"] = mesh_iou.cpu().numpy().tolist()
results[experiment_name] = experiment_results
manager.add_pred_mesh(mesh_pred, experiment_name)
# logging.info(f"Input pred shape & max: {input_m.shape}, {input_m.max()}")
# # The MeshDeformation model will return silhouettes across all view by default
#
#
#
# experiment_results = models["mesh"].run_optimization(input_m, R_gt, T_gt)
# renders = models["mesh"].render_final_mesh(
# (R_gt, T_gt), "predict", input_m.shape[-2:]
# )
#
# mesh_silhouettes = renders["silhouettes"].squeeze(1)
# mesh_images = renders["images"].squeeze(1)
# experiment_name = params.name
# for idx in range(len(mesh_silhouettes)):
# manager.add_pred(
# idx,
# mesh_silhouettes[idx].cpu().numpy(),
# "silhouette",
# destination=f"mesh_{experiment_name}",
# )
# manager.add_pred(
# idx,
# mesh_images[idx].cpu().numpy(),
# "phong",
# destination=f"mesh_{experiment_name}",
# )
#
# # Calculate chamfer loss:
# mesh_pred = models["mesh"]._final_mesh
# if mesh_type == "dolphin":
# path = params.gt_mesh_path
# mesh_gt = load_objs_as_meshes(
# [path],
# create_texture_atlas=False,
# load_textures=True,
# device=device,
# )
# # Shapenet Cars
# elif mesh_type == "shapenet":
# mesh_info = manager.metadata["mesh_info"]
# path = params.gt_mesh_path
# try:
# verts, faces, aux = load_obj(
# path, load_textures=True, create_texture_atlas=True
# )
#
# mesh_gt = Meshes(
# verts=[verts],
# faces=[faces.verts_idx],
# textures=TexturesAtlas(atlas=[aux.texture_atlas]),
# ).to(device)
# except:
# mesh_gt = None
# print("CANNOT COMPUTE CHAMFER LOSS")
# if mesh_gt and params.is_real_data:
# mesh_pred_compute, mesh_gt_compute = scale_meshes(
# mesh_pred.clone(), mesh_gt.clone()
# )
# pcl_pred = sample_points_from_meshes(
# mesh_pred_compute, num_samples=5000
# )
# pcl_gt = sample_points_from_meshes(mesh_gt_compute, num_samples=5000)
# chamfer_loss = chamfer_distance(
# pcl_pred, pcl_gt, point_reduction="mean"
# )
# print("CHAMFER LOSS: ", chamfer_loss)
# experiment_results["chamfer_loss"] = (
# chamfer_loss[0].cpu().detach().numpy().tolist()
# )
#
# mesh_iou = neg_iou_loss_all(groundtruth_silhouettes, mesh_silhouettes)
#
# experiment_results["mesh_iou"] = mesh_iou.cpu().numpy().tolist()
#
# results[experiment_name] = experiment_results
#
# manager.add_pred_mesh(mesh_pred, experiment_name)
seg_iou = neg_iou_loss_all(groundtruth_silhouettes, input_m / 255.0)
gt_iou = neg_iou_loss_all(groundtruth_silhouettes,
groundtruth_silhouettes)
results["mesh_iou"] = mesh_iou.detach().cpu().numpy().tolist()
results["seg_iou"] = seg_iou.detach().cpu().numpy().tolist()
logging.info(f"Mesh IOU list & results: {mesh_iou}")
logging.info(f"Seg IOU list & results: {seg_iou}")
logging.info(f"GT IOU list & results: {gt_iou} ")
# results["mean_iou"] = IOULoss().forward(groundtruth, mesh_silhouettes).detach().cpu().numpy().tolist()
# results["mean_dice"] = DiceCoeffLoss().forward(groundtruth, mesh_silhouettes)
manager.set_pred_results(results)
manager.close()
def load_objs_as_meshes(
files: list,
device=None,
load_textures: bool = True,
create_texture_atlas: bool = False,
texture_atlas_size: int = 4,
texture_wrap: Optional[str] = "repeat",
path_manager: Optional[PathManager] = None,
):
"""
Load meshes from a list of .obj files using the load_obj function, and
return them as a Meshes object. This only works for meshes which have a
single texture image for the whole mesh. See the load_obj function for more
details. material_colors and normals are not stored.
Args:
files: A list of file-like objects (with methods read, readline, tell,
and seek), pathlib paths or strings containing file names.
device: Desired device of returned Meshes. Default:
uses the current device for the default tensor type.
load_textures: Boolean indicating whether material files are loaded
create_texture_atlas, texture_atlas_size, texture_wrap: as for load_obj.
path_manager: optionally a PathManager object to interpret paths.
Returns:
New Meshes object.
"""
mesh_list = []
for f_obj in files:
verts, faces, aux = load_obj(
f_obj,
load_textures=load_textures,
create_texture_atlas=create_texture_atlas,
texture_atlas_size=texture_atlas_size,
texture_wrap=texture_wrap,
path_manager=path_manager,
)
tex = None
if create_texture_atlas:
# TexturesAtlas type
tex = TexturesAtlas(atlas=[aux.texture_atlas.to(device)])
else:
# TexturesUV type
tex_maps = aux.texture_images
textures = []
if tex_maps is not None and len(tex_maps) > 0:
verts_uvs = aux.verts_uvs.to(device) # (V, 2)
faces_uvs = faces.textures_idx.to(device) # (F, 3)
face_to_mat = faces.materials_idx
# code for checking
current_offset = 0
for mat_idx, (mat_name,
tex_map) in enumerate(tex_maps.items()):
image = tex_map.flip(0).unsqueeze(0).to(device)
faces_mask = face_to_mat == mat_idx
faces_verts_uvs = faces_uvs[faces_mask].unique()
tex_verts_uvs = verts_uvs[faces_verts_uvs]
tex_faces_uvs = faces_uvs[faces_mask] - current_offset
tex = TexturesUV(verts_uvs=[tex_verts_uvs],
faces_uvs=[tex_faces_uvs],
maps=image,
mat_names=[mat_name])
textures.append(tex)
current_offset += tex_verts_uvs.shape[0]
tex = textures[0]
if len(textures) > 1:
tex = tex.join_batch(textures[1:]).join_scene()
mesh = Meshes(verts=[verts.to(device)],
faces=[faces.verts_idx.to(device)],
textures=tex,
aux=aux)
mesh_list.append(mesh)
if len(mesh_list) == 1:
return mesh_list[0]
return join_meshes_as_batch(mesh_list)
