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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include "BLI_float2.hh"
#include "BLI_float3.hh"
#include "BLI_float4.hh"
namespace blender::noise {
/* --------------------------------------------------------------------
* 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);
/* --------------------------------------------------------------------
* 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);
} // namespace blender::noise
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