# Having problem about change the volume position

**URL:** https://discourse.vtk.org/t/having-problem-about-change-the-volume-position/10698
**Category:** Support
**Tags:** python
**Created:** [February 15, 2023, 2:33pm UTC](https://discourse.vtk.org/t/having-problem-about-change-the-volume-position/10698 "2023-02-15T14:33:50Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![MushengWu](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mushengwu/32/6540_2.png) [@MushengWu](https://discourse.vtk.org/u/MushengWu)
#### Post date: [February 15, 2023, 2:33pm UTC](https://discourse.vtk.org/t/having-problem-about-change-the-volume-position/10698/1 "2023-02-15T14:33:50Z")

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Sorry this problem may seem awkward.  
I rendered two object，and i need to move object\_B to a specific position in object\_A.  
And i had calculate the position and direction,  
here is the problem:  
when i set the object\_B origin position, for example:

> old\_origin(0,0,0)—\>new\_roigin(50,50,50)

I found the object\_B was in the wrong position,and then I realized that the origin position is the Physical coordinate system.But the origin position what i calculate is according the object\_A 3D array index.  
No matter how I set the origin position, it always change in the Physical coordinate system,how can i change the origin according object\_A 3D array index.  
Forgive my poor English and expression