# Some part of mesh would disappear when I rotate it
**URL:** https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149
**Category:** Support
**Created:** [January 26, 2024, 2:33am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149 "2024-01-26T02:33:59Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@zhang-qiang-github](https://discourse.vtk.org/u/zhang-qiang-github)
#### Post date: [January 26, 2024, 2:33am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/1 "2024-01-26T02:33:59Z")
I want to show a mesh:
However, when I rotate it, some part would disappear:
I want it show all mesh when I rotate camera.
I try to reset the clipping range in the `mouseMoveEvent` :
```auto
m_renderer->ResetCameraClippingRange();
m_renWin->Render();
```
But it still do not work.
What causes this phenomenon? How can I fix it?
---
### Author:  [@jie\_baoer](https://discourse.vtk.org/u/jie_baoer)
#### Post date: [January 26, 2024, 3:30am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/2 "2024-01-26T03:30:41Z")
需要获取模型最大外包边界，确保相机的位置和相机焦点大于最大外包的半径
---
### Author:  [@zhang-qiang-github](https://discourse.vtk.org/u/zhang-qiang-github)
#### Post date: [January 26, 2024, 5:16am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/4 "2024-01-26T05:16:56Z")
> [@jie\_baoer](#):
>
> 需要获取模型最大外包边界，确保相机的位置和相机焦点大于最大外包的半径
您说的这种做法，跟缩放是不是一个意思？缩放的时候，调整的就是相机位置和焦点的距离。
但实际上，我缩放后，还是有一部分mesh会消失。
---
### Author:  [@jie\_baoer](https://discourse.vtk.org/u/jie_baoer)
#### Post date: [January 26, 2024, 5:42am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/5 "2024-01-26T05:42:20Z")
好像也对，调这个函数的时候，设置一下相机范围
---
### Author:  [@zhang-qiang-github](https://discourse.vtk.org/u/zhang-qiang-github)
#### Post date: [January 27, 2024, 3:56am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/6 "2024-01-27T03:56:48Z")
> [@jie\_baoer](#):
>
> 好像也对，调这个函数的时候，设置一下相机范围
这个也试过了。
在 `mouseMoveEvent` 中，调用了：
```auto
m_renderer->ResetCameraClippingRange();
m_renWin->Render();
```
但还是没用
---
### Author:  [@Paulo\_Carvalho](https://discourse.vtk.org/u/Paulo_Carvalho)
#### Post date: [January 28, 2024, 1:31pm UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/7 "2024-01-28T13:31:40Z")
Hello,
Please, use English so other non-Chinese-speakers with the same problem can:
1. contribute;
2. benefit from the solution.
thank you,
PC
---
### Author:  [@zhang-qiang-github](https://discourse.vtk.org/u/zhang-qiang-github)
#### Post date: [January 29, 2024, 1:36am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/8 "2024-01-29T01:36:13Z")
I am apologized for using Chinese in communication. And English would be used in other communication.
@Paulo_Carvalho Do you have any suggestion for the invisible part?
---
### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [January 29, 2024, 8:18am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/9 "2024-01-29T08:18:59Z")
@jie_baoer @zhang-qiang-github
Moderator here.
I confirm that public topic should be discussed in english here. Use private communication if ever needed.
---
### Author:  [@jie\_baoer](https://discourse.vtk.org/u/jie_baoer)
#### Post date: [January 30, 2024, 5:43am UTC](https://discourse.vtk.org/t/some-part-of-mesh-would-disappear-when-i-rotate-it/13149/10 "2024-01-30T05:43:53Z")
Sorry, I’ll pay attention next time