Animated driven by rust instead of shader!

FTW!!!

assets/examples/shaders/dissolve.wgsl

@@ -10,8 +10,7 @@
 }
 
 struct MatExt {
-	step: u32,
-	// Cutoff (for animation)
+	cutoff: f32,
 }
 
 @group(1) @binding(100)
@@ -68,9 +67,7 @@ fn fragment(
 
 	var n = fbm(pos);
 
-	// out.color *= n;
-
-	var cutoff = abs(sin(globals.time));
+	var cutoff = mat_ext.cutoff; // abs(sin(globals.time));
 
 	if n > cutoff {
 		discard;

examples/shaders.rs

@@ -37,7 +37,7 @@ fn setup(
 				alpha_mode: AlphaMode::Mask(0.5),
 				..default()
 			},
-			extension: MatExt { step: 3 },
+			extension: MatExt { cutoff: 0.5 },
 		}),
 		..default()
 	});
@@ -60,7 +60,7 @@ fn setup(
 #[derive(Asset, AsBindGroup, Reflect, Debug, Clone)]
 struct MatExt {
 	#[uniform(100)]
-	step: u32,
+	cutoff: f32,
 }
 
 impl MaterialExtension for MatExt {
@@ -72,10 +72,14 @@ impl MaterialExtension for MatExt {
 fn rotate(
 	mut query: Query<&mut Transform, With<Handle<Mesh>>>,
 	time: Res<Time>,
+	mut materials: ResMut<Assets<MyMat>>,
 ) {
 	query.iter_mut().for_each(|mut t| {
 		t.rotate_local_y(time.delta_seconds() / 2.0);
 		t.rotate_local_z(time.delta_seconds() / 2.0);
 		t.rotate_local_x(time.delta_seconds() / 2.0);
+	});
+	materials.iter_mut().for_each(|(_id, m)| {
+		m.extension.cutoff = time.elapsed_seconds().sin().abs();
 	})
 }