1#import bevy_sprite::{
2    mesh2d_view_bindings::globals,
3    mesh2d_functions::{get_world_from_local, mesh2d_position_local_to_clip},
4}
5
6struct Vertex {
7    @builtin(instance_index) instance_index: u32,
8    @location(0) position: vec3<f32>,
9    @location(1) color: vec4<f32>,
10    @location(2) barycentric: vec3<f32>,
11};
12
13struct VertexOutput {
14    @builtin(position) clip_position: vec4<f32>,
15    @location(0) color: vec4<f32>,
16    @location(1) barycentric: vec3<f32>,
17};
18
19@vertex
20fn vertex(vertex: Vertex) -> VertexOutput {
21    var out: VertexOutput;
22    let world_from_local = get_world_from_local(vertex.instance_index);
23    out.clip_position = mesh2d_position_local_to_clip(world_from_local, vec4<f32>(vertex.position, 1.0));
24    out.color = vertex.color;
25    out.barycentric = vertex.barycentric;
26    return out;
27}
28
29struct FragmentInput {
30    @location(0) color: vec4<f32>,
31    @location(1) barycentric: vec3<f32>,
32};
33
34@fragment
35fn fragment(input: FragmentInput) -> @location(0) vec4<f32> {
36    let d = min(input.barycentric.x, min(input.barycentric.y, input.barycentric.z));
37    let t = 0.05 * (0.85 + sin(5.0 * globals.time));
38    return mix(vec4(1.0,1.0,1.0,1.0), input.color, smoothstep(t, t+0.01, d));
39}