114 lines
2.4 KiB
C#
114 lines
2.4 KiB
C#
using Microsoft.CodeAnalysis.CSharp.Syntax;
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using System;
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using System.ComponentModel;
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using System.Globalization;
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using System.Runtime.InteropServices;
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using System.Runtime.Serialization;
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namespace math
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{
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static public class fn
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{
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static public float ToDeg( float rad ) => ( float )(180.0 / Math.PI) * rad;
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static public float ToRad( float deg ) => ( float )(Math.PI / 180.0) * deg;
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static public float Clamp( float v, float min, float max )
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{
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return v < min ? min : v > max ? max : v;
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}
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static public float LogisticsUnit( float v, float spread = 4.0f, float height = 1.0f )
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{
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return LogisticsFull( v, height, spread, 0, 0.1f, -0.5f );
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}
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static public float LogisticsFull( float v, float height, float spread, float f, float g, float h )
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{
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float res = height / (1.0f + (float)Math.Pow( g, (spread * (v+h))) ) + f;
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return res;
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}
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static public float LogisticsSymmetric( float v, float height = 1.0f, float spread = 3.65f )
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{
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float fullHeight = height * 2.0f;
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float negF = -height;
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float res = LogisticsFull( v, fullHeight, spread, negF, 0.1f, 0.0f );
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return res;
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}
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//Tracked these down in Desmos
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static public float s_a = 0.0f;
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static public float s_b = 0.155f;
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static public float s_c = 1.03f;
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static public float s_d = 6.13f;
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static public float s_f = -10.2f;
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static public float s_g = 4.06f;
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static public float Quintic( float v )
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{
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var vv = v * v;
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var vvv = vv * v;
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var vvvv = vvv * v;
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var vvvvv= vvvv * v;
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var res = s_a + s_b*v + s_c*vv + s_d*vvv + s_f*vvvv + s_g * vvvvv;
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return res;
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}
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static public float s_p = 0.37f;
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static public float s_o = 0.15f;
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static public float s_m = 2.11f;
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static public float s_n = -0.57f;
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static public float PerlinToContinent( float h )
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{
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var res = Quintic( s_m * h + s_n ) * s_o + s_p;
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return res;
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}
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static public float SmoothStepCos( float v )
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{
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var dV = (double)v;
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var newV = 0.5 - 0.5 * Math.Cos( Math.PI * dV );
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return (float)newV;
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}
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static public float SmoothStepSquare( float v )
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{
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var dV = (double)v;
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var newV = dV * dV * (3.0 - 2.0 * dV);
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return (float)newV;
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}
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static public float SmoothStepCube( float v )
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{
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var dV = (double)v;
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var newV = dV * dV * dV * ( 6.0 * dV * dV - 15.0 * dV + 10.0 );
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return (float)newV;
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}
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}
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}
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