Refactor to make MaterialKey enum. #70
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catilac
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Feb 12, 2026
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Looks good! Noting the pattern using TypeErasure.
I left one question
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| pub(crate) fn add_standard_materials( | ||
| mut commands: Commands, | ||
| meshes: Query<(Entity, &UntypedMaterial)>, | ||
| ) { | ||
| for (entity, handle) in meshes.iter() { | ||
| let handle = handle.deref().clone(); | ||
| if let Ok(handle) = handle.try_typed::<StandardMaterial>() { | ||
| commands.entity(entity).insert(MeshMaterial3d(handle)); |
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When we want to support MeshMaterial2d, how would this look? For now we don't need to worry because we're focused on 3D
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Right now we just implement 2d via 3d, but this would allow us to switch to that later if we wanted, or vector graphics, or whatever.
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Changes
MaterialKeyto support batching for things beyondStandardMaterial.We are still implementing theColorMaterialvariant withStandardMaterial, but could choose to do so differently later.Instead of spawning with a hard-coded
MeshMaterial3d, we instead spawn anUntypedHandleand then downcast and attach the concrete material handle to the entity in a later system. This is the pattern we'll also use for custom user materials later. In other words, the core flush system now is type erased over the actual type of material.This is mostly framing for follow up PRs.