Do not work change the grid taken from another scene. #46338

New Issue

Tort · 2015-10-01T06:04:14+02:00

Tort commented

2015-10-01 06:04:14 +02:00

System Information
Ubuntu 12.04

Blender Version
Broken: (2.75a)
Worked: (2.70a)

Short description of error
Do not work change the grid taken from another scene.

Exact steps for others to reproduce the error
Do not work
sce.objects['obj'].replaceMesh(mesh, True, False)
If the mesh is in a different scene.

**System Information** Ubuntu 12.04 **Blender Version** Broken: (2.75a) Worked: (2.70a) **Short description of error** Do not work change the grid taken from another scene. **Exact steps for others to reproduce the error** Do not work sce.objects['obj'].replaceMesh(mesh, True, False) If the mesh is in a different scene.

Tort commented

2015-10-01 06:04:14 +02:00

Changed status to: 'Open'

Tort commented

2015-10-01 06:04:14 +02:00

Added subscriber: @Tort

Porteries Tristan commented

2015-10-01 11:57:04 +02:00

Added subscriber: @panzergame

Porteries Tristan commented

2015-10-01 11:57:04 +02:00

@Tort : Please provide an example file, reopen this task when you will do it.

Tort commented

2015-10-01 18:34:11 +02:00

Example
Bug_2.75a_replace_mesh_from_another_scene.blend

Example [Bug_2.75a_replace_mesh_from_another_scene.blend](https://archive.blender.org/developer/F241480/Bug_2.75a_replace_mesh_from_another_scene.blend)

Jorge Bernal commented

2015-10-03 10:31:21 +02:00

Added subscriber: @JorgeBernalMartinez

Jorge Bernal commented

2015-10-03 10:31:41 +02:00

I confirm the bug.

Porteries Tristan commented

2015-10-03 18:27:51 +02:00

It's not a bug because two scene can have a mesh with the same name, so by default replaceMesh function works only with the object's scene meshes.

The bug is more that BGE doesn't print a message error for this.

It's not a bug because two scene can have a mesh with the same name, so by default replaceMesh function works only with the object's scene meshes. The bug is more that BGE doesn't print a message error for this.

perfection cat commented

2015-10-05 03:33:06 +02:00

Added subscriber: @sindra1961

perfection cat commented

2015-10-05 03:33:06 +02:00

@panzergame:
I think that your understanding is wrong.
Even if the scenes are different, the object of the same name cannot exist.
In such a case we cannot identify an object by the name in bpy.data.objects.

@panzergame: I think that your understanding is wrong. Even if the scenes are different, the object of the same name cannot exist. In such a case we cannot identify an object by the name in bpy.data.objects.

Ulysse Martin commented

2015-10-05 15:29:05 +02:00

Added subscriber: @you.le

Ulysse Martin commented

2015-10-05 15:29:05 +02:00

The problem seems to come from this commit:

$ git bisect bad
6c9dd174a8 is the first bad commit
commit 6c9dd174a8
Author: Mitchell Stokes mogurijin@gmail.com
Date: Mon Jun 2 18:52:13 2014 -0700

Fix #39053: Replace mesh actuator does not replace material (only mesh)

The replace mesh actuator was reconverting the mesh data which causes
conflicts with the LoD code. Instead, we just look for an already
converted mesh, which should already be in the scene.

https://developer.blender.org/rB6c9dd174a8bc2cd9a857c96f3ddfdb398aa6f88c

The problem seems to come from this commit: $ git bisect bad 6c9dd174a8bc2cd9a857c96f3ddfdb398aa6f88c is the first bad commit commit 6c9dd174a8bc2cd9a857c96f3ddfdb398aa6f88c Author: Mitchell Stokes <mogurijin@gmail.com> Date: Mon Jun 2 18:52:13 2014 -0700 Fix #39053: Replace mesh actuator does not replace material (only mesh) The replace mesh actuator was reconverting the mesh data which causes conflicts with the LoD code. Instead, we just look for an already converted mesh, which should already be in the scene. https://developer.blender.org/rB6c9dd174a8bc2cd9a857c96f3ddfdb398aa6f88c

Porteries Tristan commented

2015-10-17 10:24:26 +02:00

Added subscribers: @Moguri, @ideasman42, @dr.sybren

Porteries Tristan commented

2015-10-17 10:24:26 +02:00

Mesh are shared by library in blender but not in the BGE : the BGE make a copy of a mesh for each scene if at least one object use it. So you can't replace by a mesh not in the object's scene, KX_GameObject.replaceMesh respect this behavior only the replace mesh logic brick respect half it : it does nothing but doesn't print any warning message.

Why not share meshes between scenes ?
It will disallow to free a scene because one of the scene's mesh can be owned in any other object, and the replace mesh brick should always check if its mesh still exist.
Of course we can do like libload : remove all meshes in all objects owned by the freeing library.

@ideasman42, @Moguri, @dr.sybren : What are your opinion on this report ?

Mesh are shared by library in blender but not in the BGE : the BGE make a copy of a mesh for each scene if at least one object use it. So you can't replace by a mesh not in the object's scene, KX_GameObject.replaceMesh respect this behavior only the replace mesh logic brick respect half it : it does nothing but doesn't print any warning message. `Why not share meshes between scenes ?` It will disallow to free a scene because one of the scene's mesh can be owned in any other object, and the replace mesh brick should always check if its mesh still exist. Of course we can do like libload : remove all meshes in all objects owned by the freeing library. @ideasman42, @Moguri, @dr.sybren : What are your opinion on this report ?

Tort commented

2015-10-17 12:40:36 +02:00

Why not share meshes between scenes ?

Because no room to swing fall.

> Why not share meshes between scenes ? Because no room to swing fall. ![Снимок экрана от 2015-10-17 17:31:37.jpg](https://archive.blender.org/developer/F245640/Снимок_экрана_от_2015-10-17_17_31_37.jpg)

Porteries Tristan commented

2015-10-29 12:14:10 +01:00

Changed status from 'Open' to: 'Resolved'

Porteries Tristan closed this issue

2015-10-29 12:14:10 +01:00

blender-admin commented

2015-10-29 12:14:40 +01:00

This issue was referenced by 8d3d931f6a

This issue was referenced by 8d3d931f6a6401b44a23357839f498fdb7f24e36

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Do not work change the grid taken from another scene. #46338