trying to build a temporary pivot tool

[Frame]

I’m trying to build a temporary pivot tool, and I made a very simple version just to test the core logic.

The idea is:
I compute the relative matrix and apply it to the selected object.

The problem is that while I’m working on the current frame, everything behaves correctly.
But after I close the tool and scrub or check other frames, the character gets completely broken

What could be causing this issue?

I’ve uploaded the code and a screen recording of the problem to Google Drive

https://drive.google.com/drive/folders/1Bs1oB_2rrRAreBJ0REZZpn2ZW4zbyz0P?usp=sharing


Also This is another test. The problem is that the translation is always wrong.
I’m doing the test on frame 7, and I uploaded the scene I’m testing on to Drive.


import maya.cmds as cmds

import maya.mel

import maya.api.OpenMaya as om

import maya.api.OpenMayaAnim as oma

import math



def get_dag_path(nodeName):

selection_list = om.MSelectionList().add(nodeName)

return selection_list.getDagPath(0)



# pivot_name_1 repesent point a

pivot_name_1 = "locator3"

pivot_1 = get_dag_path(pivot_name_1)

pivot_matrix_1 = pivot_1.inclusiveMatrix()



# pivot_name_2 repesent point b ( after locator3 moved )

pivot_name_2 = "locator4"

pivot_2 = get_dag_path(pivot_name_2)

pivot_matrix_2 = pivot_2.inclusiveMatrix()



# obj_name = "Char_Norman_A1_v011:ctrl_Root"

obj_name = "Char_Norman_A1_v011:ctrlIK_Lf_ArmIK"

obj = get_dag_path(obj_name)

obj_matrix = obj.inclusiveMatrix()





# parent_name = "Char_Norman_A1_v011:grAll_Ctrl"

parent_name = "Char_Norman_A1_v011:grCon_Lf_ArmIK"

parent = get_dag_path(parent_name)

parent_matrix = parent.inclusiveMatrix()



relative_matrix = obj_matrix * pivot_matrix_1.inverse()

new_obj_matrix = relative_matrix * pivot_matrix_2

local_matrix = new_obj_matrix * parent_matrix.inverse()



transform_matrix = om.MTransformationMatrix(new_obj_matrix)

translation = transform_matrix.translation(om.MSpace.kTransform)

rotation = transform_matrix.rotation(False)



cmds.xform(obj_name, translation=translation)

cmds.xform(obj_name,

rotation=[ math.degrees(rotation.x), math.degrees(rotation.y), math.degrees(rotation.z) ])

[Marcus Ottosson]

Just to give you some idea of what some of us are seeing and how challenging it would be to try and understand you.

Most people are busy people, any obstacle you can remove between question and answer, such as not having to visit Google Drive and formatting your code with syntax highlighting, will yield a quicker answer for you. Win-win.

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[Kangd dan]

https://github.com/kangddan/LinkTempPivot  

Please check this GitHub repository; a few months ago, I implemented a simple script that mimics a TempPivot feature similar to AnimBot

[Frame]

Sorry about that, I’ll be more careful next time. Thanks for pointing it out.

[Frame]

I’ve checked it, thank you so much. 
And Great job on the tool and the clean, well-organized code.

 I just had a few questions—I sent you a private message and hope you get a chance to take a look.

‫في الأربعاء، 7 يناير 2026 في 3:44 م تمت كتابة ما يلي بواسطة ‪Kangd dan‬‏ <‪aa1518...@gmail.com‬‏>:‬

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