# Why does vtkCamera auto adjust camera position after something rendered.

**URL:** https://discourse.vtk.org/t/why-does-vtkcamera-auto-adjust-camera-position-after-something-rendered/3678
**Category:** Development
**Created:** [July 1, 2020, 7:54am UTC](https://discourse.vtk.org/t/why-does-vtkcamera-auto-adjust-camera-position-after-something-rendered/3678 "2020-07-01T07:54:27Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![veltia](https://discourse.vtk.org/user_avatar/discourse.vtk.org/veltia/32/7191_2.png) [@veltia](https://discourse.vtk.org/u/veltia)
#### Post date: [July 1, 2020, 7:54am UTC](https://discourse.vtk.org/t/why-does-vtkcamera-auto-adjust-camera-position-after-something-rendered/3678/1 "2020-07-01T07:54:27Z")

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Hi all,  
I tried to set vtkCamera to make the origin of world coordinate to be the middle of the render window.  
It works if theres only a AxesActor display at the orgin. (actorAxes-\>SetPosition(0, 0, 0);  
 ![image](https://discourse.vtk.org/uploads/default/original/2X/7/7f19f916a9f4aafe0294c335ac57913e1a4d7488.png)

But when I tried to add another actor into renderer, the origin of world coordinate doesn’t display at the middle of the render window, camera fixed postion to fit the new actor I think.