59 lines
1.8 KiB
C#
59 lines
1.8 KiB
C#
using System;
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using UnityEngine;
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namespace UltimateWater
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{
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public class PhillipsSpectrum : WaterWavesSpectrum
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{
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private readonly float _CutoffFactor;
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public PhillipsSpectrum(float tileSize, float gravity, float windSpeed, float amplitude, float cutoffFactor)
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: base(tileSize, gravity, windSpeed, amplitude)
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{
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_CutoffFactor = cutoffFactor;
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}
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public override void ComputeSpectrum(Vector3[] spectrum, float tileSizeMultiplier, int maxResolution, System.Random random)
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{
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float num = base.TileSize * tileSizeMultiplier;
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float num2 = _Amplitude * ComputeWaveAmplitude(_WindSpeed);
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float num3 = 1f / num;
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int num4 = Mathf.RoundToInt(Mathf.Sqrt(spectrum.Length));
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int num5 = num4 / 2;
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float windSpeed = _WindSpeed;
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float num6 = windSpeed * windSpeed / _Gravity;
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float num7 = num6 * num6;
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float num8 = FastMath.Pow2(num6 / _CutoffFactor);
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float num9 = Mathf.Sqrt(num2 * Mathf.Pow(100f / num, 2.35f) / 2000000f);
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for (int i = 0; i < num4; i++)
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{
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float num10 = MathF.PI * 2f * (float)(i - num5) * num3;
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for (int j = 0; j < num4; j++)
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{
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float num11 = MathF.PI * 2f * (float)(j - num5) * num3;
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float num12 = Mathf.Sqrt(num10 * num10 + num11 * num11);
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float num13 = num12 * num12;
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float num14 = num13 * num13;
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float f = Mathf.Exp(-1f / (num13 * num7) - num13 * num8) / num14;
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f = num9 * Mathf.Sqrt(f);
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float x = FastMath.Gauss01() * f;
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float y = FastMath.Gauss01() * f;
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int num15 = (i + num5) % num4;
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int num16 = (j + num5) % num4;
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if (i == num5 && j == num5)
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{
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x = 0f;
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y = 0f;
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}
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spectrum[num15 * num4 + num16] = new Vector3(x, y, 1f);
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}
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}
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}
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private static float ComputeWaveAmplitude(float windSpeed)
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{
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return 0.002f * windSpeed * windSpeed * windSpeed;
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}
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}
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}
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