add_mesh_pyramid.py 文件源码

def create_step(width, base_level, step_height, num_sides):

        axis = [0,0,-1]
        PI2 = pi * 2
        rad = width / 2

        quat_angles = [(cur_side/num_sides) * PI2 
                            for cur_side in range(num_sides)]

        quaternions = [Quaternion(axis, quat_angle) 
                            for quat_angle in quat_angles]

        init_vectors = [Vector([rad, 0, base_level])] * len(quaternions)

        quat_vector_pairs = list(zip(quaternions, init_vectors))
        vectors = [quaternion * vec for quaternion, vec in quat_vector_pairs]
        bottom_list = [(vec.x, vec.y, vec.z) for vec in vectors]
        top_list = [(vec.x, vec.y, vec.z+step_height) for vec in vectors]
        full_list = bottom_list + top_list
        return full_list