How to apply a postprocessor to a specific actor

[Ziphil]

Hello,
First thank you so much for this great engine! I'm really enjoying building a game with it.

I've read this documentation and tried to apply a postprocessor to a specific actor. I've tried the following but ended up seeing the postprocessor applied to the whole screen:

const postProcessor = /* instanciate a postprocessor */
actor.graphics.onPreDraw = (context) => {
  context.save()
  context.addPostProcessor(postProcessor)
  context.restore()
}

Is there a way to apply a postprocessor (or a WebGL fragment shader) to only a specific actor?

[eonarheim]

Hi @Ziphil thanks for the kind words!

At the moment we don't have a way for postprocessors to apply to a specific actor.

This is something I've been thinking about though, potentially applied to Raster graphics like the ex.Canvas and/or prehaps to ex.ImageSource.

Let me know what you think!

[pixelprodukt]

I would also vote for the possibility to add a shader to specific actors, that's the one thing I'm currently missing. Kinda to do like outlines on interactable objects or 'shadow'-vision if some actor is behind something and so on.

[eonarheim]

@pixelprodukt I've been thinking about this more, I wonder if we might be able to have a custom renderer attached to specific actors, which would give you the specific shader.

[pixelprodukt]

You mean like a custom renderer component? That would be nice I think.

[eonarheim]

@pixelprodukt @Ziphil We've merged per actor shaders into alpha! Check them out #2670

This will land in v0.28.0 very soon, but you can try the latest alpha bits