public void Update(float time, NativeArray <Color> pixels)
{
int halfYSize = (gridSize / 2) + 1;
for (int y = 0; y < halfYSize; y++)
{
for (int x = 0; x < gridSize; x++)
{
var index = Grid2Index(x, y);
var data = waveConstantLUT[index];
var mirrorIndex = Grid2MirrorIndex(x, y);
var mirrorData = waveConstantLUT[mirrorIndex];
var freq = data.freq * time;
var freqSin = Mathf.Sin(freq);
var freqCos = Mathf.Cos(freq);
var ep = new ComplexF(freqCos, freqSin);
var em = ep.conj;
var wave = data.amp * ep + mirrorData.amp.conj * em;
heightField[index] = wave;
dispFieldX[index] = wave * data.kLenX;
dispFieldZ[index] = wave * data.kLenZ;
if (y != halfYSize - 1)
{
heightField[mirrorIndex] = heightField[index].conj;
dispFieldX[mirrorIndex] = dispFieldX[index].conj;
dispFieldZ[mirrorIndex] = dispFieldZ[index].conj;
}
}
}
fftHelper.DoFFT2D(heightField);
fftHelper.DoFFT2D(dispFieldX);
fftHelper.DoFFT2D(dispFieldZ);
for (int y = 0; y < gridSize; y++)
{
for (int x = 0; x < gridSize; x++)
{
var index = Grid2Index(x, y);
var sign = PowNeg1(x + y);
heightField[index] *= sign * maxWaveSize;
dispFieldX[index] *= sign * choppyWaveScale;
dispFieldZ[index] *= sign * choppyWaveScale;
pixels[index] = new Color(dispFieldX[index].real,
-heightField[index].real,
dispFieldZ[index].real,
1);
}
}
}
