Project vectors onto the faces of the mesh.
Consider a numpy array face_vectors whose rows provide a vector for each face in the mesh. For each face, project_face_vector computes the dot product between a vector and the corresponding face’s unit normal vector. That is, project_face_vector projects the vectors in face_vectors to the faces of the mesh.
Numpy array containing the vectors that will be projected to the mesh faces
Dot product between each vector and the unit normal vector of the corresponding face