/// <summary>
/// Perform fourier tranform on three textures.
/// </summary>
public int PeformFFT(RenderTexture[] data0, RenderTexture[] data1, RenderTexture[] data2)
{
RenderTexture[] pass0 = new RenderTexture[] { data0[0], data1[0], data2[0] };
RenderTexture[] pass1 = new RenderTexture[] { data0[1], data1[1], data2[1] };
int i;
int idx = 0; int idx1;
int j = 0;
for (i = 0; i < m_passes; i++, j++)
{
idx = j % 2;
idx1 = (j + 1) % 2;
m_fourier.SetTexture("_ButterFlyLookUp", m_butterflyLookupTable[i]);
m_fourier.SetTexture("_ReadBuffer0", data0[idx1]);
m_fourier.SetTexture("_ReadBuffer1", data1[idx1]);
m_fourier.SetTexture("_ReadBuffer2", data2[idx1]);
if (idx == 0)
{
RTUtility.MultiTargetBlit(pass0, m_fourier, PASS_X_3);
}
else
{
RTUtility.MultiTargetBlit(pass1, m_fourier, PASS_X_3);
}
}
for (i = 0; i < m_passes; i++, j++)
{
idx = j % 2;
idx1 = (j + 1) % 2;
m_fourier.SetTexture("_ButterFlyLookUp", m_butterflyLookupTable[i]);
m_fourier.SetTexture("_ReadBuffer0", data0[idx1]);
m_fourier.SetTexture("_ReadBuffer1", data1[idx1]);
m_fourier.SetTexture("_ReadBuffer2", data2[idx1]);
if (idx == 0)
{
RTUtility.MultiTargetBlit(pass0, m_fourier, PASS_Y_3);
}
else
{
RTUtility.MultiTargetBlit(pass1, m_fourier, PASS_Y_3);
}
}
return(idx);
}
/// <summary>
/// Initilize the spectrum for a time period.
/// </summary>
void InitWaveSpectrum(float t)
{
RenderTexture[] buffers = new RenderTexture[] { m_fourierBuffer0[1], m_fourierBuffer1[1], m_fourierBuffer2[1] };
m_initSpectrumMaterial.SetFloat("_T", t);
RTUtility.MultiTargetBlit(buffers, m_initSpectrumMaterial);
RenderTexture[] buffers34 = new RenderTexture[] { m_fourierBuffer3[1], m_fourierBuffer4[1] };
m_initDisplacementMat.SetTexture("_Buffer1", m_fourierBuffer1[1]);
m_initDisplacementMat.SetTexture("_Buffer2", m_fourierBuffer2[1]);
RTUtility.MultiTargetBlit(buffers34, m_initDisplacementMat);
}