Object distorts when mesh is too far from object's origin #44735

New Issue

Alejandro Anzola Avila · 2015-05-16T23:56:00+02:00

2015-05-16 23:56:00 +02:00

{F175622}System Information
Windows 7 x64
Nvidia Geforce GTX 780 x2 driver 347.52

Blender Version
Broken: Blender 2.74, 2.73 and even before

Description
When mesh is too far from object's origins it starts to distort, most notable when using subsurf, it once happened to me (couldn't recreate it in my example) that the when using the Looptools addon Circle option, after operating the mesh would not be a circle but instead I got a very distorted circle (I think it's internal, not the addon). In the case of my .blend example I just recreated the distortion visible from the subsurf modifier.

Exact steps for others to reproduce the error
Created circle in the scene, then in Edit mode, I moved the mesh to (1000, 1000, 0), then extruded to make it a cilinder of it, then applied a subsurf modifier with 4 levels of subdivision and there it can be seen that the mesh is distorted.

![bug.PNG](https://archive.blender.org/developer/F175620/bug.PNG) {[F175622](https://archive.blender.org/developer/F175622/bug.blend)}**System Information** Windows 7 x64 Nvidia Geforce GTX 780 x2 driver 347.52 **Blender Version** Broken: Blender 2.74, 2.73 and even before **Description** When mesh is too far from object's origins it starts to distort, most notable when using subsurf, it once happened to me (couldn't recreate it in my example) that the when using the Looptools addon Circle option, after operating the mesh would not be a circle but instead I got a very distorted circle (I think it's internal, not the addon). In the case of my .blend example I just recreated the distortion visible from the subsurf modifier. **Exact steps for others to reproduce the error** Created circle in the scene, then in Edit mode, I moved the mesh to (1000, 1000, 0), then extruded to make it a cilinder of it, then applied a subsurf modifier with 4 levels of subdivision and there it can be seen that the mesh is distorted.

Alejandro Anzola Avila commented

2015-05-16 23:56:01 +02:00

Changed status to: 'Open'

Alejandro Anzola Avila commented

2015-05-16 23:56:01 +02:00

Added subscriber: @SkinMan95

Bastien Montagne commented

2015-05-17 12:18:01 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2015-05-17 12:18:01 +02:00

Bastien Montagne self-assigned this 2015-05-17 12:18:01 +02:00

Bastien Montagne commented

2015-05-17 12:18:01 +02:00

Thanks for the report, but no bug here, you are simply reaching the famous floating point precision issue (your mesh is 10000 units offset, btw, not 1000).

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Object distorts when mesh is too far from object's origin #44735