Trying to better understand render <-> game thread updates

[benjaminsuch]

Hello guys!

First of all, I want to congratulate you for this really nice engine. It's really interesting to read the code and understand the architecture behind it. One thing I still have a hard time to really understand is how the render thread updates the scene based on information coming from the game thread. How does a system on the game thread tells the renderer to update a mesh? I see you use SharedArrayBuffer in the TripleBuffer to update the matrix of a mesh, but what about updating the material? Or the visibility?

Example:

Entity {
  ColorComponent: "blue",
  VisibleComponent: true
}

If I update ColorComponent to "red", how does the renderer know to display the material in red? Does the ColorSystem have to update the triple buffer? Is everything store in the SharedArrayBuffer? The same with VisibleComponent: Is the visible value of Object3D also stored in the buffer?

[benjaminsuch]

I digged a bit deeper and found out that most happens in resource/RemoteResourceClass.ts. I'm not sure if I understood everything, but what basically happens is:

• The RenderThread and GameThread register their modules including ResourceModule
• ResourceModule registers it's resources in it's init function
• RemoteResourceClass iterates through the schema of it's resource and creates a resource for each resource-type
• The id of every created resource is then stored in an ArrayBuffer
• GameResourceSystem will then write the ArrayBuffer of each resource to it's TripleBuffer, that has been created before iterating through the schema

Is that correct so far or did I miss something important?