muv_uvbb_ops.py 文件源码

def to_matrix(self):
        """
        mat = M(to original transform)^-1 * Mt(to origin) * Ms *
              Mt(to origin)^-1 * M(to original transform)
        """
        m = self.__mat
        mi = self.__mat.inverted()
        mtoi = mathutils.Matrix.Translation((-self.__iox, -self.__ioy, 0.0))
        mto = mathutils.Matrix.Translation((self.__iox, self.__ioy, 0.0))
        # every point must be transformed to origin
        t = m * mathutils.Vector((self.__ix, self.__iy, 0.0))
        tix, tiy = t.x, t.y
        t = m * mathutils.Vector((self.__ox, self.__oy, 0.0))
        tox, toy = t.x, t.y
        t = m * mathutils.Vector((self.__x, self.__y, 0.0))
        tx, ty = t.x, t.y
        ms = mathutils.Matrix()
        ms.identity()
        if self.__dir_x == 1:
            ms[0][0] = (tx - tox) * self.__dir_x / (tix - tox)
        if self.__dir_y == 1:
            ms[1][1] = (ty - toy) * self.__dir_y / (tiy - toy)
        return mi * mto * ms * mtoi * m