Read and unpack the next bytes from a binary file. :param fid: :param num_bytes: Sum of combination of {2, 4, 8}, e.g. 2, 6, 16, 30, etc.

Return a 2D tensor with the specified cols and dtype filled with data, even when data is empty.

Format indices and check for invalid values. Indices can refer to values in one of the face properties: vertices, textures or normals. Se

Update the faces properties when vertex masks are changed

Get vertex indicies by regions

Construct a lookup table from face id to cluster id. cluster #0: background cluster #1: foreground c

Render the scene. Background tensor (bg_color) must be on GPU!

Load materials and optionally textures from the specified path. Args: material_names: a list of the material names found in the .obj

Load a mesh from a file-like object. See load_obj function more details. Any material files associated with the obj are expected to be in the

Load a mesh from a file-like object. See load_obj function for more details about the return values.

Convert rotations given as axis/angle to quaternions. Args: axis_angle: Rotations given as a vector in axis angle form,

Applies a batch of rigid transformations to the joints Parameters ---------- rot_mats : torch.tensor BxNx3x3 Tensor of rotat

Calculates the rotation matrices for a batch of rotation vectors Parameters ---------- rot_vecs: torch.tensor Nx3 array of N axis-

Calculates the per vertex displacement due to the blend shapes Parameters ---------- betas : torch.tensor Bx(num_betas) Blend sh

Add some cutom masks based on the original FLAME masks

:param vertices: [batch size, number of vertices, 3] :param faces: [batch size, number of faces, 3] :return: [batch size, number of faces

:param points: torch.Tensor, (N, D), D is the dimension of each point :return: (N, )