1#import bevy_sprite::mesh2d_functions::{
2    get_world_from_local,
3    mesh2d_position_local_to_clip,
4}
5#import noisy_bevy::worley_2d
6
7struct NoiseMaterial {
8    frequency_scale: f32,
9    amplitude_scale: f32,
10}
11
12@group(2) @binding(0) var<uniform> material: NoiseMaterial;
13
14struct VertexInput {
15    @builtin(instance_index) instance_index: u32,
16    @location(0) position: vec3<f32>,
17    @location(1) blend_color: vec4<f32>,
18};
19
20struct VertexOutput {
21    @builtin(position) clip_position: vec4<f32>,
22    @location(0) object_position: vec2<f32>,
23};
24
25@vertex
26fn vertex(vertex: VertexInput) -> VertexOutput {
27    var out: VertexOutput;
28    // Project the world position of the mesh to screen position
29    let model = get_world_from_local(vertex.instance_index);
30    out.clip_position = mesh2d_position_local_to_clip(model, vec4<f32>(vertex.position, 1.0));
31    out.object_position = vertex.position.xy;
32    return out;
33}
34
35@fragment
36fn fragment(
37    in: VertexOutput,
38) -> @location(0) vec4<f32> {
39    let position = in.object_position * material.frequency_scale;
40    let jitter = 1.0;
41    let worley = worley_2d(position, jitter) * material.amplitude_scale;
42    
43    let distance = worley.x; 
44
45    return vec4(distance, distance, distance, 1.);
46}