1#import bevy_enoki::particle_vertex_out::{ VertexOutput }
2
3@group(1) @binding(0) var texture: texture_2d<f32>;
4@group(1) @binding(1) var texture_sampler: sampler;
5@group(1) @binding(2) var<uniform> frame_data: vec4<u32>;
6
7
8@fragment
9fn fragment(in: VertexOutput) -> @location(0) vec4<f32> {
10	var out = in.color;
11
12	let max_hframe = f32(frame_data.x);
13	let max_vframe = f32(frame_data.y);
14
15    let total_frames = max_hframe * max_vframe;
16    let current_frame = floor(in.lifetime_frac * total_frames);
17
18    let hframe = current_frame % max_hframe;
19    let vframe = floor(current_frame / max_hframe);
20
21    let frame_width = 1.0 / max_hframe;
22    let frame_height = 1.0 / max_vframe;
23
24    let u_offset = hframe * frame_width;
25    let v_offset = (max_vframe - vframe - 1.0) * frame_height;
26
27    let uv = in.uv * vec2<f32>(frame_width, frame_height) + vec2<f32>(u_offset, v_offset);
28	return out * textureSample(texture, texture_sampler, uv);
29}