Today modified previous function a bit, found unable to rotate face-based component on sloped face during testing. Checked for an afternoon, checked everything from face retrieval to transform conversion found no error. Finally found it should be problem of AXIS parameter during rotation. Checked AXIS vector is consistent with FACE.NORMAL of sloped face, perpendicular to specified face, but every rotation errors. Afterwards set rotation axis to (0,0,1) then can generate normally,,, don’t know where the problem is, temporarily record it down, continue to supplement after figuring it out