如何使用Python在Maya中找到立方体的Y面

Question

抱歉，我想只有了解玛雅的人才会回答这个问题。在Maya中，我有不同大小的立方体，我需要用python找到立方体的哪个面指向Y轴。（枢轴在中间）任何提示都将不胜感激

非常感谢：）

Answer 1

import re
from maya import cmds
from pymel.core.datatypes import Vector, Matrix, Point

obj = 'pCube1'
# Get the world transformation matrix of the object
obj_matrix = Matrix(cmds.xform(obj, query=True, worldSpace=True, matrix=True))
# Iterate through all faces
for face in cmds.ls(obj + '.f[*]', flatten=True):
    # Get face normal in object space
    face_normals_text = cmds.polyInfo(face, faceNormals=True)[0]
    # Convert to a list of floats
    face_normals = [float(digit) for digit in re.findall(r'-?\d*\.\d*', face_normals_text)]
    # Create a Vector object and multiply with matrix to get world space
    v = Vector(face_normals) * obj_matrix
    # Check if vector faces downwards
    if max(abs(v[0]), abs(v[1]), abs(v[2])) == -v[1]:
        print face, v