1#define_import_path bevy_water::water_functions
2
3#ifdef PREPASS_PIPELINE
4#import bevy_render::globals::Globals
5@group(0) @binding(1) var<uniform> globals: Globals;
6#else
7#import bevy_pbr::mesh_view_bindings::globals
8#endif
9
10#import bevy_water::water_bindings::material
11#import bevy_water::noise;
12
13fn wave(p: vec2<f32>) -> f32 {
14  let time = globals.time * .5 + 23.0;
15
16  let time_x = time / 1.0;
17  let time_y = time / 0.5;
18  let wave_len_x = 5.0;
19  let wave_len_y = 2.0;
20  let wave_x = cos(p.x / wave_len_x + time_x);
21  let wave_y = smoothstep(1.0, 0.0, abs(sin(p.y / wave_len_y + wave_x + time_y)));
22#if QUALITY < 3
23  let n = noise::fbm::fbm_half(p) / 2.0 - 1.0;
24#else
25  let n = noise::fbm::fbm(p) / 2.0 - 1.0;
26#endif
27  return wave_y + n;
28}
29
30fn get_wave_height(p: vec2<f32>) -> f32 {
31  let time = globals.time / 2.0;
32  var d = wave((p - time) * 0.3) * 0.3;
33#if QUALITY >= 2
34  d = d + wave((p + time) * 0.4) * 0.3;
35#endif
36#if QUALITY >= 3
37  d = d + wave((p + time) * 0.5) * 0.2;
38#endif
39#if QUALITY >= 4
40  d = d + wave((p - time) * 0.6) * 0.2;
41#endif
42  return material.amplitude * d;
43}
44
45fn uv_to_coord(uv: vec2<f32>) -> vec2<f32> {
46  return material.coord_offset + (uv * material.coord_scale);
47}