How to change which material is pointed to by Handle<ColorMaterial>

[ViddeM]

Hi!

I'm trying to build a game where I have a bunch (order of millions) of tiles that can have a relatively small number of colors (~10). The tiles are all spawned using MaterialMesh2dBundle with the material set to an initial choice. However, throughout the game the tiles are supposed to be able to change to one of the other materials and I can't seem to figure out how to do this.

Of course I could have a unique material for each tile but that seems highly inefficient when what I really would like to do is simply point the existing material handle to a different material handle.

[alice-i-cecile]

I would store a central resource that lets you quickly and easily look up the handles:

#[derive(PartialEq, Eq, Hash)]
enum TileType {
   Grass,
   Stone,
   Dirt,
}

#[derive(Resource, Deref, DerefMut)
struct TileHandles(HashMap<TileType, Handle<ColorMaterial>>);

// Set your handles like
*tile_handle = tile_handles.get(TileType::Grass).unwrap().clone_weak();

[ViddeM]

Ah yeah I already had the central storage setup, I just didn't realize I could just dereference the tile_handle to update it 😅

Thanks! :)