fft_resolve.wgsl — bevy-aqua-waves

Constants

FFT_RESOLUTION

#

const FFT_RESOLUTION: u32 = 256u

LOD_COUNT

#

const LOD_COUNT: u32 = 5u

ATTENUATION_BINS

#

const ATTENUATION_BINS: u32 = 4u

NO_BED_DEPTH

#

const NO_BED_DEPTH: f32 = 256.0

Bindings

height_x

#

@group(0)

@binding(0)

var height_x: texture_2d_array<f32>

z_field

#

@group(0)

@binding(1)

var z_field: texture_2d_array<f32>

bed_height

#

@group(0)

@binding(2)

var bed_height: texture_2d<f32>

output

#

@group(0)

@binding(3)

var output: texture_storage_2d_array<rgba16float, write>

fft

#

@group(0)

@binding(4)

var<uniform> fft: FftUniform

Structures

CascadeParams

#

struct CascadeParams {

center: vec2<f32>,

scale: f32,

texture_res: f32,

inv_texture_res: f32,

texel_width: f32,

weight: f32,

max_wavelength: f32,

}

CascadeLayout

#

struct CascadeLayout {

cascades: array<CascadeParams, 6>,

center: vec4<f32>,

bed_transform: vec4<f32>,

bed_range: vec4<f32>,

}

FftUniform

#

struct FftUniform {

cascade_layout: CascadeLayout,

params: vec4<f32>,

mode: vec4<f32>,

}

Functions

bed_water_depth

#

Water depth under the sea level from the game’s bed height map. Outside the mapped area (or with no map at all) the sample keeps the deep default, mirroring a full-depth capture texel. Nearest-texel read: the shoaling profile is smooth enough that one bed texel per cascade texel suffices.

fn bed_water_depth (

world_xz: vec2<f32>

) -> f32

shoaling_weights

#

fn shoaling_weights (

depth: f32,

wave_number: f32

) -> vec2<f32>

resolve

#

fn resolve (

@builtin(global_invocation_id)

id: vec3<u32>

)