The shader port in Plane9 have a few predefined functions and defines

Defines ||Name||Description|| |PI|The value of pi 3.14159265358979323846| |PI2|Two times the value of pi 6.283185307179586232 |

Functions ||Name||Description|| |float3 _hsv2rgb(float3 HSV)|Converts a HSV value to a RGB value| |float3 _hsv2rgb(float h, float s, float v)|Converts a HSV value to a RGB value| |float _perm(float pos)|Permutation value. Basically a random value but uses the values defined by perlin| |float _perm(float2 pos)|Permutation value. Basically a random value but uses the values defined by perlin| |float _noisefast(float p)|Fast perlin noise from a 1d point. This is a perlin noise approximation and it does have artifacats if used on its own. It is however fast| |float _noisefast(float2 p)|Fast perlin noise from a 2d point. This is a perlin noise approximation and it does have artifacats if used on its own. It is however fast| |float _noisefast(float3 p)|Fast perlin noise from a 3d point. This is a perlin noise approximation and it does have artifacats if used on its own. It is however fast| |float3 _noisegradientfast(float p, float d)|Gradient of a fast noise 1d value| |float3 _noisegradientfast(float2 p, float d)|Gradient of a fast noise 2d value| |float3 _noisegradientfast(float3 p, float d)|Gradient of a fast noise 3d value| |float _fbmfast(float p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Fractal sum of a 1d point| |float _fbmfast(float2 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Fractal sum of a 2d point| |float _fbmfast(float3 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Fractal sum of a 3d point| |float _turbulencefast(float p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Tubulence for a 1d point| |float _turbulencefast(float2 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Tubulence for a 2d point| |float _turbulencefast(float3 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Tubulence for a 3d point| |float _ridgedmffast(float p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Ridged multifractal of a 1d point| |float _ridgedmffast(float2 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5)|Ridged multifractal of a 2d point| |float _ridgedmffast(float3 p, int octaves, float lacunarity = 2.13628142, float gain = 0.5, float offset = 1.0)|Ridged multifractal of a 3d point| |void _voronoi(float2 position, out float f1, out float2 pos1, out float f2, out float2 pos2, float jitter = 0.9, int type = 0)|Worly Noise / Voronoi. f1/pos1 is the distance and poistion of the closest point. f2/pos2 is the distance to the next closest point. 0=Normal,1=Manhattan Distance, 2=Chebyshev distance| |void _voronoi(float3 position, out float f1, out float3 pos1, out float f2, out float3 pos2, float jitter = 0.9, int type = 0)|Worly Noise / Voronoi. f1/pos1 is the distance and poistion of the closest point. f2/pos2 is the distance to the next closest point. 0=Normal,1=Manhattan Distance, 2=Chebyshev distance|

In the above functions the arguments are as follows ||Name||Description|| |Octaves|The number of octaves of noise to sum together. Higher value creates more details but is slower| |Lacunarity|For each octave of noise the frequency of the noise is increased by this amount. Prefereably avoid integer values since it reduces aliasing artifcats| |Gain|For each octave of noise the gain is increase by this amount|