hybrid style ECS to render objects ?

Unity Engine
1

Hello, does and one know how to use hybrid style ECS to render the object meshrenderer.

would be very interested to find out if it possible?

I would also like to know if ECS can take care of the physics?

Thanks

Daniel

2

You turn off the MeshRenderer, then you base your drawing on Graphics.DrawMesh or Graphics.DrawMeshInstanced instead. You can make a system with required data coming from ECS then loop through them to use those commands. In the future, those 2 commands would ideally accept native containers so no copy from ECS out is required. Currently the fast way to copy data out from ECS you can look in MeshInstanceRendererSystem.cs > CopyMatrices.

MeshInstanceRendererComponent together with PositionComponent RotationComponent etc. uses this approach by collecting/processing the matrix required for Graphics.DrawMeshInstanced and finally loop through them in a system. Mesh can go in an ISharedComponentData.

ECS does not support physics right now…

1 Like
3

Hi, and thanks for the reply. In context of the hybrid system i am currently doing this:

    struct Components
    {
        public Rotator rotator;
        public Transform transform;
        public MeshRenderer renderer;
      
    }
    protected override void OnUpdate()
    {
        foreach (var e in GetEntities<Components>())
        {
            var time = Time.deltaTime;
            e.transform.Rotate(0, e.rotator._speed * time, 0);
            //e.renderer.material.color = e.rotator._color;
        }

    }

How would i implement what you have suggested in this scenario?

4

here I’ve posted an example with physics and rendering using game objects

ECS part is a pure without using mono-behavior-components on entities

5

Line 12 should be outside of the loop. It will not change during execution of this loop and you are unnecessarily paying a cost of method call each loop iteration.

6

Hi Micz, thanks for that reply, yeah was on to that was just seeing if it made a difference :wink: