Add more comments in the example.

Author: cryscan

assets/shaders/texture_binding_array.wgsl

@@ -8,6 +8,7 @@ fn fragment(
     #import bevy_pbr::mesh_vertex_output
 ) -> @location(0) vec4<f32> {
 #ifdef VERTEX_UVS
+    // Select the texture to sample from using non-uniform uv coordinates
     let coords = clamp(vec2<u32>(uv * 4.0), vec2<u32>(0u), vec2<u32>(3u));
     let index = coords.y * 4u + coords.x;
     return textureSample(textures[index], samplers[index], uv * 3.9 + 0.05);

examples/shader/texture_binding_array.rs

@@ -30,7 +30,7 @@ impl FromWorld for ColorTextures {
     fn from_world(world: &mut World) -> Self {
         let mut images = world.resource_mut::<Assets<Image>>();
 
-        // Create 16 textures with different color gradient
+        // Create 16 textures with different color gradients
         let handles = (1..=MAX_TEXTURE_COUNT)
             .map(|id| {
                 let mut pixel = vec![(256 / id - 1) as u8; 64];
@@ -109,6 +109,7 @@ impl AsBindGroup for BindlessMaterial {
         let mut textures: Vec<_> = textures.into_iter().map(|texture| &**texture).collect();
         let mut samplers: Vec<_> = samplers.into_iter().map(|sampler| &**sampler).collect();
 
+        // Fill in up to the first `MAX_TEXTURE_COUNT` textures and samplers to the arrays
         for (id, image) in self
             .textures
             .iter()