Pvec3 ***talloc_vec3_matrix3 (num_x,num_y,num_z)
Pint num_x; Pint num_y; Pint num_z;
Example
Tvec3D_data mesh_data; mesh_data.parallelepipedic.v = talloc_vec3_matrix (15,25,12); mesh_data.parallelepipedic.v[10][15][8].delta_x = 10.0; mesh_data.parallelepipedic.v[10][15][8].delta_y = 5.0; mesh_data.parallelepipedic.v[10][15][8].delta_z = 7.0;