BGE-optimized vertex deform method causes vertices to go smooth #41520

New Issue

Sam Brubaker · 2014-08-21T04:51:41+02:00

Sam Brubaker commented

2014-08-21 04:51:41 +02:00

Version: 2.71 official (linux 64)

How to reproduce:

Open the attached .blend and play the cube clicking game.
Notice that the cube mesh suddenly becomes smooth when moved at all by the armature.

Change the armature vertex deformation method from "BGE" to "Blender" and repeat. The issue disappears.

BGE_Deform_Bug.blend

Why would the BGE method cause all the mesh faces to become smooth? It does not seem necessary. Can this be fixed?

Version: 2.71 official (linux 64) How to reproduce: - Open the attached .blend and play the cube clicking game. - Notice that the cube mesh suddenly becomes smooth when moved at all by the armature. # Change the armature vertex deformation method from "BGE" to "Blender" and repeat. The issue disappears. [BGE_Deform_Bug.blend](https://archive.blender.org/developer/F105682/BGE_Deform_Bug.blend) Why would the BGE method cause all the mesh faces to become smooth? It does not seem necessary. Can this be fixed?

Sam Brubaker commented

2014-08-21 04:51:41 +02:00

Changed status to: 'Open'

Sam Brubaker commented

2014-08-21 04:51:41 +02:00

Added subscriber: @rocketman

Sergey Sharybin commented

2014-08-21 10:48:37 +02:00

Added subscribers: @brita, @Moguri

Mitchell Stokes commented

2014-08-22 08:16:19 +02:00

I haven't looked into this yet, but it might be due to how the normals are calculated. For the BGE deformer, the vertex normals are approximated and transformed while the vertex is being transformed. The Blender deformer goes though and recalculates all the normals after the vertex transforms have been done.

Sam Brubaker commented

2014-08-23 19:56:25 +02:00

Interesting. Would this difference necessitate the smoothing of all normals in BGE deform?

Vincent Girès commented

2014-11-23 14:10:39 +01:00

Added subscriber: @VincentGires

Aaron Carlisle commented

2019-06-29 02:12:01 +02:00

Changed status from 'Open' to: 'Archived'

Aaron Carlisle closed this issue

2019-06-29 02:12:01 +02:00

Aaron Carlisle self-assigned this 2019-06-29 02:12:01 +02:00

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BGE-optimized vertex deform method causes vertices to go smooth #41520

Change the armature vertex deformation method from "BGE" to "Blender" and repeat. The issue disappears.