protected override void UpdateNode()
{
if (DrawOcean == true)
{
var t = Time.realtimeSinceStartup;
InitWaveSpectrum(t);
// Perform fourier transform and record what is the current index
IDX = Fourier.PeformFFT(FourierBuffer0, FourierBuffer1, FourierBuffer2);
Fourier.PeformFFT(FourierBuffer3, FourierBuffer4);
// Copy the contents of the completed fourier transform to the map textures.
// You could just use the buffer textures (FourierBuffer0,1,2,etc) to read from for the ocean shader
// but they need to have mipmaps and unity updates the mipmaps
// every time the texture is renderer into. This impacts performance during fourier transform stage as mipmaps would be updated every pass
// and there is no way to disable and then enable mipmaps on render textures in Unity at time of writting.
Graphics.Blit(FourierBuffer0[IDX], Map0);
Graphics.Blit(FourierBuffer1[IDX], Map1);
Graphics.Blit(FourierBuffer2[IDX], Map2);
Graphics.Blit(FourierBuffer3[IDX], Map3);
Graphics.Blit(FourierBuffer4[IDX], Map4);
OceanMaterial.SetVector("_Ocean_MapSize", new Vector2(FloatSize, FloatSize));
OceanMaterial.SetVector("_Ocean_Choppyness", Choppyness);
OceanMaterial.SetVector("_Ocean_GridSizes", GridSizes);
OceanMaterial.SetFloat("_Ocean_HeightOffset", OceanLevel);
OceanMaterial.SetTexture("_Ocean_Variance", Variance);
OceanMaterial.SetTexture("_Ocean_Map0", Map0);
OceanMaterial.SetTexture("_Ocean_Map1", Map1);
OceanMaterial.SetTexture("_Ocean_Map2", Map2);
OceanMaterial.SetTexture("_Ocean_Map3", Map3);
OceanMaterial.SetTexture("_Ocean_Map4", Map4);
}
base.UpdateNode();
}
public void SimulateWaves(float t)
{
InitWaveSpectrum(t);
m_idx = m_fourier.PeformFFT(m_fourierBuffer0, m_fourierBuffer1, m_fourierBuffer2);
//Copy the contents of the completed fourier transform to the map textures.
//Graphics Blit is needed as ReadPixels is not able to copy from one render texture to another at time of writting
//You could just use the buffer textures (m_fourierBuffer0,1,2) to read from for the ocean shader but they need to have mipmaps and unity updates the mipmaps
//every time the texture is renderer into. This impacts performance during fourier transform stage as mipmaps would be updated every pass
//and there is no way to disable and then enable mipmaps on render textures at time of writting.
Graphics.Blit(m_fourierBuffer0[m_idx], m_map0);
Graphics.Blit(m_fourierBuffer1[m_idx], m_map1);
Graphics.Blit(m_fourierBuffer2[m_idx], m_map2);
}