diff options
Diffstat (limited to 'source/blender/blenlib/BLI_noise.hh')
| -rw-r--r-- | source/blender/blenlib/BLI_noise.hh | 40 |
1 files changed, 35 insertions, 5 deletions
diff --git a/source/blender/blenlib/BLI_noise.hh b/source/blender/blenlib/BLI_noise.hh index 760ff082d06..7e1655f7864 100644 --- a/source/blender/blenlib/BLI_noise.hh +++ b/source/blender/blenlib/BLI_noise.hh @@ -22,36 +22,66 @@ namespace blender::noise { -/* Perlin noise in the range [-1, 1]. */ +/* -------------------------------------------------------------------- + * 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, |