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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
#include "BLI_math_vec_types.hh"
namespace blender::noise {
/* -------------------------------------------------------------------- */
/** \name Hash Functions
*
* Create a randomized hash from the given inputs. Contrary to hash functions in `BLI_hash.hh`
* these functions produce better randomness but are more expensive to compute.
* \{ */
/* Hash integers to `uint32_t`. */
uint32_t hash(uint32_t kx);
uint32_t hash(uint32_t kx, uint32_t ky);
uint32_t hash(uint32_t kx, uint32_t ky, uint32_t kz);
uint32_t hash(uint32_t kx, uint32_t ky, uint32_t kz, uint32_t kw);
/* Hash floats to `uint32_t`. */
uint32_t hash_float(float kx);
uint32_t hash_float(float2 k);
uint32_t hash_float(float3 k);
uint32_t hash_float(float4 k);
/* Hash integers to `float` between 0 and 1. */
float hash_to_float(uint32_t kx);
float hash_to_float(uint32_t kx, uint32_t ky);
float hash_to_float(uint32_t kx, uint32_t ky, uint32_t kz);
float hash_to_float(uint32_t kx, uint32_t ky, uint32_t kz, uint32_t kw);
/* Hash floats to `float` between 0 and 1. */
float hash_float_to_float(float k);
float hash_float_to_float(float2 k);
float hash_float_to_float(float3 k);
float hash_float_to_float(float4 k);
float2 hash_float_to_float2(float2 k);
float3 hash_float_to_float3(float k);
float3 hash_float_to_float3(float2 k);
float3 hash_float_to_float3(float3 k);
float3 hash_float_to_float3(float4 k);
float4 hash_float_to_float4(float4 k);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Perlin Noise
* \{ */
/* Perlin noise in the range [-1, 1]. */
float perlin_signed(float position);
float perlin_signed(float2 position);
float perlin_signed(float3 position);
float perlin_signed(float4 position);
/* Perlin noise in the range [0, 1]. */
float perlin(float position);
float perlin(float2 position);
float perlin(float3 position);
float perlin(float4 position);
/* Fractal perlin noise in the range [0, 1]. */
float perlin_fractal(float position, float octaves, float roughness);
float perlin_fractal(float2 position, float octaves, float roughness);
float perlin_fractal(float3 position, float octaves, float roughness);
float perlin_fractal(float4 position, float octaves, float roughness);
/* Positive distorted fractal perlin noise. */
float perlin_fractal_distorted(float position, float octaves, float roughness, float distortion);
float perlin_fractal_distorted(float2 position, float octaves, float roughness, float distortion);
float perlin_fractal_distorted(float3 position, float octaves, float roughness, float distortion);
float perlin_fractal_distorted(float4 position, float octaves, float roughness, float distortion);
/* Positive distorted fractal perlin noise that outputs a float3. */
float3 perlin_float3_fractal_distorted(float position,
float octaves,
float roughness,
float distortion);
float3 perlin_float3_fractal_distorted(float2 position,
float octaves,
float roughness,
float distortion);
float3 perlin_float3_fractal_distorted(float3 position,
float octaves,
float roughness,
float distortion);
float3 perlin_float3_fractal_distorted(float4 position,
float octaves,
float roughness,
float distortion);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Musgrave Multi Fractal
* \{ */
/**
* 1D Ridged Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_ridged_multi_fractal(
float co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 2D Ridged Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_ridged_multi_fractal(
const float2 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 3D Ridged Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_ridged_multi_fractal(
const float3 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 4D Ridged Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_ridged_multi_fractal(
const float4 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 1D Hybrid Additive/Multiplicative Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hybrid_multi_fractal(
float co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 2D Hybrid Additive/Multiplicative Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hybrid_multi_fractal(
const float2 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 3D Hybrid Additive/Multiplicative Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hybrid_multi_fractal(
const float3 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 4D Hybrid Additive/Multiplicative Multi-fractal Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hybrid_multi_fractal(
const float4 co, float H, float lacunarity, float octaves, float offset, float gain);
/**
* 1D Musgrave fBm
*
* \param H: fractal increment parameter.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_fBm(float co, float H, float lacunarity, float octaves);
/**
* 2D Musgrave fBm
*
* \param H: fractal increment parameter.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_fBm(const float2 co, float H, float lacunarity, float octaves);
/**
* 3D Musgrave fBm
*
* \param H: fractal increment parameter.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_fBm(const float3 co, float H, float lacunarity, float octaves);
/**
* 4D Musgrave fBm
*
* \param H: fractal increment parameter.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_fBm(const float4 co, float H, float lacunarity, float octaves);
/**
* 1D Musgrave Multi-fractal
*
* \param H: highest fractal dimension.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_multi_fractal(float co, float H, float lacunarity, float octaves);
/**
* 2D Musgrave Multi-fractal
*
* \param H: highest fractal dimension.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_multi_fractal(const float2 co, float H, float lacunarity, float octaves);
/**
* 3D Musgrave Multi-fractal
*
* \param H: highest fractal dimension.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_multi_fractal(const float3 co, float H, float lacunarity, float octaves);
/**
* 4D Musgrave Multi-fractal
*
* \param H: highest fractal dimension.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
*/
float musgrave_multi_fractal(const float4 co, float H, float lacunarity, float octaves);
/**
* 1D Musgrave Heterogeneous Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hetero_terrain(float co, float H, float lacunarity, float octaves, float offset);
/**
* 2D Musgrave Heterogeneous Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hetero_terrain(
const float2 co, float H, float lacunarity, float octaves, float offset);
/**
* 3D Musgrave Heterogeneous Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hetero_terrain(
const float3 co, float H, float lacunarity, float octaves, float offset);
/**
* 4D Musgrave Heterogeneous Terrain
*
* \param H: fractal dimension of the roughest area.
* \param lacunarity: gap between successive frequencies.
* \param octaves: number of frequencies in the fBm.
* \param offset: raises the terrain from `sea level'.
*/
float musgrave_hetero_terrain(
const float4 co, float H, float lacunarity, float octaves, float offset);
/** \} */
/* -------------------------------------------------------------------- */
/** \name Voronoi Noise
* \{ */
void voronoi_f1(float w, float randomness, float *r_distance, float3 *r_color, float *r_w);
void voronoi_smooth_f1(
float w, float smoothness, float randomness, float *r_distance, float3 *r_color, float *r_w);
void voronoi_f2(float w, float randomness, float *r_distance, float3 *r_color, float *r_w);
void voronoi_distance_to_edge(float w, float randomness, float *r_distance);
void voronoi_n_sphere_radius(float w, float randomness, float *r_radius);
void voronoi_f1(const float2 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float2 *r_position);
void voronoi_smooth_f1(const float2 coord,
float smoothness,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float2 *r_position);
void voronoi_f2(const float2 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float2 *r_position);
void voronoi_distance_to_edge(const float2 coord, float randomness, float *r_distance);
void voronoi_n_sphere_radius(const float2 coord, float randomness, float *r_radius);
void voronoi_f1(const float3 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float3 *r_position);
void voronoi_smooth_f1(const float3 coord,
float smoothness,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float3 *r_position);
void voronoi_f2(const float3 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float3 *r_position);
void voronoi_distance_to_edge(const float3 coord, float randomness, float *r_distance);
void voronoi_n_sphere_radius(const float3 coord, float randomness, float *r_radius);
void voronoi_f1(const float4 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float4 *r_position);
void voronoi_smooth_f1(const float4 coord,
float smoothness,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float4 *r_position);
void voronoi_f2(const float4 coord,
float exponent,
float randomness,
int metric,
float *r_distance,
float3 *r_color,
float4 *r_position);
void voronoi_distance_to_edge(const float4 coord, float randomness, float *r_distance);
void voronoi_n_sphere_radius(const float4 coord, float randomness, float *r_radius);
/** \} */
} // namespace blender::noise
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