Force a node to rebuild

[Makio64]

Description

Add ability to force a node to rebuild.

PS : It might already exist, but for example how to force scene.backgroundNode to rebuild ?

Solution

node.needsUpdate = true

Alternatives

node.rebuild()

Additional context

No response

[RenaudRohlinger]

In which context would you need to update only a node?

If it's for a material material.needsUpdate = true should work, otherwise in the context of postprocessing postprocessing.needsUpdate = true;

[Makio64]

@RenaudRohlinger : In the context of the scene.backgroundNode for example ( I’m not sure if internally it use a material?)

I guest it might exist other edge cases ?

[RenaudRohlinger]

Technically scene.backgroundNode simply creates a new NodeMaterial so it's the same, but for this particular case we would indeed need a way to mark the generated backgroundMesh from backgroundNode to needsUpdate = true but the logic should stay basically the same.

Maybe we could mark a material as needsUpdate = true if one of its node has its version incremented. However, this approach might introduce some overhead in the renderer pipeline for what is essentially an edge case.

[Makio64]

@RenaudRohlinger Oh thanks I was wondering about it. I angree introduce automatic needs update is not a good solution as it can introduce a lot of overhead and dev can easily control this.
Just before closing this issue, is there a way to access to the backgroundMesh.material ?

[RenaudRohlinger]

Post initial compilation of the backgroundNode:

console.log( renderer._background.get( scene ).backgroundMesh.material );

[Samsy]

Got same troubles for the scene.fogNode, it does not rebuild !
@RenaudRohlinger