examples: rename texture-light -> advanced-gen-texture-light

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

examples/advanced-gen-texture-light/cube.wgsl

@@ -0,0 +1,75 @@
+struct CameraUniform {
+    pos: vec4<f32>,
+	view_proj: mat4x4<f32>,
+};
+
+struct InstanceInput {
+    @location(3) model_matrix_0: vec4<f32>,
+    @location(4) model_matrix_1: vec4<f32>,
+    @location(5) model_matrix_2: vec4<f32>,
+    @location(6) model_matrix_3: vec4<f32>,
+};
+
+struct VertexInput {
+	@location(0) position: vec3<f32>,
+	@location(1) normal: vec3<f32>,
+	@location(2) tex_coords: vec2<f32>,
+};
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+    @location(0) tex_coords: vec2<f32>,
+    @location(1) normal: vec3<f32>,
+    @location(2) position: vec3<f32>,
+};
+
+struct Light {
+	position: vec4<f32>,
+	color: vec4<f32>,
+};
+
+@group(0) @binding(0) var<uniform> camera: CameraUniform;
+@group(1) @binding(0) var t_diffuse: texture_2d<f32>;
+@group(1) @binding(1) var s_diffuse: sampler;
+@group(2) @binding(0) var<uniform> light: Light;
+
+@stage(vertex)
+fn vs_main(model: VertexInput, instance: InstanceInput) -> VertexOutput {
+	let model_matrix = mat4x4<f32>(
+    	instance.model_matrix_0,
+    	instance.model_matrix_1,
+    	instance.model_matrix_2,
+    	instance.model_matrix_3,
+	);
+    var out: VertexOutput;
+    let world_pos = model_matrix * vec4<f32>(model.position, 1.0);
+    out.position = world_pos.xyz;
+    out.normal = (model_matrix * vec4<f32>(model.normal, 0.0)).xyz;
+    out.clip_position = camera.view_proj * world_pos;
+    out.tex_coords = model.tex_coords;
+    return out;
+}
+
+@stage(fragment)
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+    let object_color = textureSample(t_diffuse, s_diffuse, in.tex_coords);
+
+	let ambient = 0.1;
+	let ambient_color = light.color.rbg * ambient;
+
+	let light_dir = normalize(light.position.xyz - in.position);
+	let diffuse = max(dot(in.normal, light_dir), 0.0);
+	let diffuse_color = light.color.rgb * diffuse;
+
+	let view_dir = normalize(camera.pos.xyz - in.position);
+	let half_dir = normalize(view_dir + light_dir);
+	let specular = pow(max(dot(in.normal, half_dir), 0.0), 32.0);
+	let specular_color = light.color.rbg * specular;
+
+	let all = ambient_color + diffuse_color + specular_color;
+
+	let result = all * object_color.rbg;
+
+	return vec4<f32>(result, object_color.a);
+
+}