Add material_tilemap_layout

assets/custom_shader.wgsl

@@ -2,6 +2,14 @@
 #import bevy_ecs_tilemap::vertex_output MeshVertexOutput
 #import bevy_sprite::mesh2d_view_bindings globals
 
+struct MyMaterial {
+    brightness: f32,
+    _padding: vec3<f32>
+};
+
+@group(3) @binding(0)
+var<uniform> material: MyMaterial;
+
 fn hsv2rgb(c: vec3<f32>) -> vec3<f32>
 {
     let K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
@@ -14,5 +22,5 @@ fn fragment(in: MeshVertexOutput) -> @location(0) vec4<f32> {
     let color = process_fragment(in);
 
     let hsv = vec3(abs(sin(globals.time)), 1.0, 1.0);
-    return vec4(color.rgb + hsv2rgb(hsv), color.a);
+    return vec4((color.rgb + hsv2rgb(hsv)) * material.brightness, color.a);
 }

examples/custom_shader.rs

@@ -8,7 +8,13 @@ mod helpers;
 
 #[derive(AsBindGroup, TypeUuid, TypePath, Debug, Clone, Default)]
 #[uuid = "31575692-a956-4762-98e2-5d457f552d0a"]
-pub struct MyMaterial {}
+pub struct MyMaterial {
+    #[uniform(0)]
+    brightness: f32,
+    // webgl2 requires 16 byte alignment
+    #[uniform(0)]
+    _padding: Vec3,
+}
 
 impl MaterialTilemap for MyMaterial {
     fn fragment_shader() -> bevy::render::render_resource::ShaderRef {
@@ -23,7 +29,10 @@ fn startup(
 ) {
     commands.spawn(Camera2dBundle::default());
 
-    let my_material_handle = materials.add(MyMaterial {});
+    let my_material_handle = materials.add(MyMaterial {
+        brightness: 0.5,
+        ..default()
+    });
 
     let texture_handle: Handle<Image> = asset_server.load("tiles.png");
 

src/render/material.rs

@@ -199,6 +199,7 @@ where
             self.tilemap_pipeline.view_layout.clone(),
             self.tilemap_pipeline.mesh_layout.clone(),
             self.tilemap_pipeline.material_layout.clone(),
+            self.material_tilemap_layout.clone(),
         ];
 
         M::specialize(&mut descriptor, key);