private void CreateFinalSkyboxLUT()
{
int texDepth = (int)_skyboxLUTSize.z;
int texWidth = (int)_skyboxLUTSize.x;
int texHeight = (int)_skyboxLUTSize.y;
int floatSize = sizeof(float);
int channels = 4;
int texSize = texWidth * texHeight * texDepth;
if (_skyboxLUT == null)
{
_skyboxLUT = new RenderTexture((int)_skyboxLUTSize.x, (int)_skyboxLUTSize.y, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
_skyboxLUT.volumeDepth = (int)_skyboxLUTSize.z;
_skyboxLUT.dimension = UnityEngine.Rendering.TextureDimension.Tex3D;
_skyboxLUT.enableRandomWrite = true;
_skyboxLUT.name = "SkyboxLUT";
_skyboxLUT.Create();
}
ComputeBuffer buffer = new ComputeBuffer(texSize, floatSize * channels); // 4 bytes for float and 4 channels
buffer.SetData(_skyboxData);
CBUtility.WriteIntoRenderTexture(_skyboxLUT, channels, buffer, FrostbiteWriteShader);
buffer.Release();
//SaveTextureAsKTX(_skyboxLUT, "skyboxlut", true);
}
public void ReadTextureFromKTX(RenderTexture rtex, String name)
{
FileStream fs = new FileStream("Assets/Textures/" + name + ".ktx", FileMode.Open);
BinaryReader reader = new BinaryReader(fs);
// skip header and meta data
reader.ReadBytes(36);
int texWidth = (int)reader.ReadUInt32();
int texHeight = (int)reader.ReadUInt32();
int texDepth = (int)reader.ReadUInt32();
int channelCount = 4;
int channelSize = 1;
int texSize = texWidth * texHeight * texDepth;
if (rtex == null)
{
rtex = new RenderTexture(texWidth, texHeight, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
rtex.volumeDepth = texDepth;
rtex.dimension = UnityEngine.Rendering.TextureDimension.Tex3D;
rtex.enableRandomWrite = true;
rtex.name = "Noise3DTex";
rtex.filterMode = FilterMode.Trilinear;
rtex.wrapMode = TextureWrapMode.Repeat;
rtex.Create();
}
reader.ReadBytes(16);
int bufferSize = (int)reader.ReadUInt32();
ComputeBuffer buffer = new ComputeBuffer(texSize, channelSize * channelCount); // 4 bytes for float and 4 channels
buffer.SetData(reader.ReadBytes(bufferSize));
CBUtility.WriteIntoRenderTexture(rtex, channelCount, buffer, FrostbiteWriteShader);
buffer.Release();
}
private void CopyDataToTextures()
{
//Transmittance is responsible for the change in the sun color as it moves
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
string path = Application.streamingAssetsPath + "/Textures/transmittance.raw";
ComputeBuffer buffer = new ComputeBuffer(TRANSMITTANCE_WIDTH * TRANSMITTANCE_HEIGHT, sizeof(float) * TRANSMITTANCE_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_transmittance, TRANSMITTANCE_CHANNELS, path, buffer, m_writeData);
buffer.Release();
//Inscatter is responsible for the change in the sky color as the sun moves
//The raw file is a 4D array of 32 bit floats with a range of 0 to 1.589844
//As there is not such thing as a 4D texture the data is packed into a 3D texture
//and the shader manually performs the sample for the 4th dimension
path = Application.streamingAssetsPath + "/Textures/inscatter.raw";
buffer = new ComputeBuffer(INSCATTER_WIDTH * INSCATTER_HEIGHT * INSCATTER_DEPTH, sizeof(float) * INSCATTER_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_inscatter, INSCATTER_CHANNELS, path, buffer, m_writeData);
buffer.Release();
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
path = Application.streamingAssetsPath + "/Textures/irradiance.raw";
buffer = new ComputeBuffer(IRRADIANCE_WIDTH * IRRADIANCE_HEIGHT, sizeof(float) * IRRADIANCE_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_irradiance, IRRADIANCE_CHANNELS, path, buffer, m_writeData);
buffer.Release();
}
private void CreateWTable()
{
// Some values need for the InitWaveSpectrum function can be precomputed
var uv = Vector2.zero;
var st = Vector2.zero;
float k1, k2, k3, k4, w1, w2, w3, w4;
var table = new float[FourierGridSize * FourierGridSize * 4];
for (int x = 0; x < FourierGridSize; x++)
{
for (int y = 0; y < FourierGridSize; y++)
{
uv = new Vector2(x, y) / MapSize;
st.x = uv.x > 0.5f ? uv.x - 1.0f : uv.x;
st.y = uv.y > 0.5f ? uv.y - 1.0f : uv.y;
k1 = (st * InverseGridSizes.x).magnitude;
k2 = (st * InverseGridSizes.y).magnitude;
k3 = (st * InverseGridSizes.z).magnitude;
k4 = (st * InverseGridSizes.w).magnitude;
w1 = Mathf.Sqrt(9.81f * k1 * (1.0f + k1 * k1 / (WAVE_KM * WAVE_KM)));
w2 = Mathf.Sqrt(9.81f * k2 * (1.0f + k2 * k2 / (WAVE_KM * WAVE_KM)));
w3 = Mathf.Sqrt(9.81f * k3 * (1.0f + k3 * k3 / (WAVE_KM * WAVE_KM)));
w4 = Mathf.Sqrt(9.81f * k4 * (1.0f + k4 * k4 / (WAVE_KM * WAVE_KM)));
table[(x + y * FourierGridSize) * 4 + 0] = w1;
table[(x + y * FourierGridSize) * 4 + 1] = w2;
table[(x + y * FourierGridSize) * 4 + 2] = w3;
table[(x + y * FourierGridSize) * 4 + 3] = w4;
}
}
// Write floating point data into render texture
var buffer = new ComputeBuffer(FourierGridSize * FourierGridSize, sizeof(float) * 4);
buffer.SetData(table);
CBUtility.WriteIntoRenderTexture(WTable, CBUtility.Channels.RGBA, buffer, GodManager.Instance.WriteData);
buffer.ReleaseAndDisposeBuffer();
}
/// <summary>
/// Some of the values needed in the InitWaveSpectrum function can be precomputed.
/// If the grid sizes change this function must called again.
/// </summary>
void CreateWTable()
{
//Some values need for the InitWaveSpectrum function can be precomputed
Vector2 uv, st;
float k1, k2, k3, k4, w1, w2, w3, w4;
float[] table = new float[m_size * m_size * 4];
for (int x = 0; x < m_size; x++)
{
for (int y = 0; y < m_size; y++)
{
uv = new Vector2(x, y) / m_fsize;
st.x = uv.x > 0.5f ? uv.x - 1.0f : uv.x;
st.y = uv.y > 0.5f ? uv.y - 1.0f : uv.y;
k1 = (st * m_inverseGridSizes.x).magnitude;
k2 = (st * m_inverseGridSizes.y).magnitude;
k3 = (st * m_inverseGridSizes.z).magnitude;
k4 = (st * m_inverseGridSizes.w).magnitude;
w1 = Mathf.Sqrt(9.81f * k1 * (1.0f + k1 * k1 / (WAVE_KM * WAVE_KM)));
w2 = Mathf.Sqrt(9.81f * k2 * (1.0f + k2 * k2 / (WAVE_KM * WAVE_KM)));
w3 = Mathf.Sqrt(9.81f * k3 * (1.0f + k3 * k3 / (WAVE_KM * WAVE_KM)));
w4 = Mathf.Sqrt(9.81f * k4 * (1.0f + k4 * k4 / (WAVE_KM * WAVE_KM)));
table[(x + y * m_size) * 4 + 0] = w1;
table[(x + y * m_size) * 4 + 1] = w2;
table[(x + y * m_size) * 4 + 2] = w3;
table[(x + y * m_size) * 4 + 3] = w4;
}
}
//Write floating point data into render texture
ComputeBuffer buffer = new ComputeBuffer(m_size * m_size, sizeof(float) * 4);
buffer.SetData(table);
CBUtility.WriteIntoRenderTexture(m_WTable, 4, buffer, m_writeData);
buffer.Release();
}
private void CalculateAO()
{
Debug.Log("Precomputing AO Started...");
int GRIDRES_AO = 128;
int N_AO = 2;
var options = new ParallelOptions {
MaxDegreeOfParallelism = 4
};
float[] buf = new float[GRIDRES_AO * GRIDRES_AO * GRIDRES_AO * 4];
for (int i = 0; i < GRIDRES_AO; ++i)
{
for (int j = 0; j < GRIDRES_AO; ++j)
{
for (int k = 0; k < GRIDRES_AO; ++k)
{
int off = i + j * GRIDRES_AO + k * GRIDRES_AO * GRIDRES_AO;
buf[4 * off] = 0;
buf[4 * off + 1] = 0;
buf[4 * off + 2] = 0;
buf[4 * off + 3] = 0;
}
}
}
var indices = PreProcessMesh.GetIndices(0);
var vertices = PreProcessMesh.vertices;
for (int ni = 0; ni < indices.Length; ni += 3)
{
int a = indices[ni];
int b = indices[ni + 1];
int c = indices[ni + 2];
float x1 = vertices[a].x, y1 = vertices[a].y, z1 = vertices[a].z;
float x2 = vertices[b].x, y2 = vertices[b].y, z2 = vertices[b].z;
float x3 = vertices[c].x, y3 = vertices[c].y, z3 = vertices[c].z;
x1 = (x1 + 1.0f) / 2.0f;
x2 = (x2 + 1.0f) / 2.0f;
x3 = (x3 + 1.0f) / 2.0f;
y1 = (y1 + 1.0f) / 2.0f;
y2 = (y2 + 1.0f) / 2.0f;
y3 = (y3 + 1.0f) / 2.0f;
z1 = (z1 + 1.0f) / 2.0f;
z2 = (z2 + 1.0f) / 2.0f;
z3 = (z3 + 1.0f) / 2.0f;
double l12 = Mathf.Sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1) + (z2 - z1) * (z2 - z1));
double l23 = Mathf.Sqrt((x3 - x2) * (x3 - x2) + (y3 - y2) * (y3 - y2) + (z3 - z2) * (z3 - z2));
double l31 = Mathf.Sqrt((x1 - x3) * (x1 - x3) + (y1 - y3) * (y1 - y3) + (z1 - z3) * (z1 - z3));
if (l12 > l23 && l12 > l31)
{
Swap(ref a, ref c);
Swap(ref x1, ref x3); Swap(ref y1, ref y3); Swap(ref z1, ref z3);
Swap(ref l12, ref l23);
}
else if (l31 > l12 && l31 > l23)
{
Swap(ref a, ref b);
Swap(ref x1, ref x2); Swap(ref y1, ref y2); Swap(ref z1, ref z2);
Swap(ref l31, ref l23);
}
int n12 = (int)(Math.Ceiling(l12 * GRIDRES_AO) * 2.0);
int n13 = (int)(Math.Ceiling(l31 * GRIDRES_AO) * 2.0);
Parallel.For(0, n12 - 1, i =>
{
var u = (double)i / n12;
Parallel.For(0, n13 - 1, j =>
{
var v = (double)j / n13;
if (u + v < 1.0)
{
var x = x1 + u * (x2 - x1) + v * (x3 - x1);
var y = y1 + u * (y2 - y1) + v * (y3 - y1);
var z = z1 + u * (z2 - z1) + v * (z3 - z1);
int ix = (int)(x * GRIDRES_AO);
int iy = (int)(y * GRIDRES_AO);
int iz = (int)(z * GRIDRES_AO);
if (ix >= 0 && ix < GRIDRES_AO && iy >= 0 && iy < GRIDRES_AO && iz >= 0 && iz < GRIDRES_AO)
{
int off = 4 * (ix + iy * GRIDRES_AO + iz * GRIDRES_AO * GRIDRES_AO);
buf[off] = 255;
buf[off + 1] = 255;
buf[off + 2] = 255;
buf[off + 3] = 255;
}
}
});
});
}
Debug.Log("Precomputing AO Mesh Passed...");
double[] vocc = new double[GRIDRES_AO * GRIDRES_AO * GRIDRES_AO];
for (int i = 0; i < GRIDRES_AO * GRIDRES_AO * GRIDRES_AO; ++i)
{
vocc[i] = 1.0;
}
double zmax = Math.Abs(Z);
double zmin = -Math.Abs(Z);
Parallel.For(0, N_AO - 1, options, i =>
{
var theta = (i + 0.5) / N_AO * Math.PI / 2.0;
var dtheta = 1.0 / N_AO * Math.PI / 2.0;
Parallel.For(0, (4 * N_AO) - 1, options, j =>
{
var phi = (j + 0.5) / (4 * N_AO) * 2.0 * Math.PI;
var dphi = 1.0 / (4 * N_AO) * 2.0 * Math.PI;
var docc = Math.Cos(theta) * Math.Sin(theta) * dtheta * dphi / Math.PI;
if ((i * 4 * N_AO + j) % 4 == 0)
{
Debug.Log(string.Format("Precomputing AO Step {0} of {1}", i * 4 * N_AO + j, 4 * N_AO * N_AO));
}
Vector3d uz = new Vector3d(Math.Cos(phi) * Math.Sin(theta), Math.Sin(phi) * Math.Sin(theta), Math.Cos(theta));
Vector3d ux = uz.z.EpsilonEquals(1.0, 0.0000001) ? new Vector3d(1.0, 0.0, 0.0) : new Vector3d(-uz.y, uz.x, 0.0).Normalized();
Vector3d uy = uz.Cross(ux);
Matrix3x3d toView = new Matrix3x3d(ux.x, ux.y, ux.z, uy.x, uy.y, uy.z, uz.x, uz.y, uz.z);
Matrix3x3d toVol = new Matrix3x3d(ux.x, uy.x, uz.x, ux.y, uy.y, uz.y, ux.z, uy.z, uz.z);
Box3d b = new Box3d();
b = b.Enlarge(toView * new Vector3d(-1.0, -1.0, zmin));
b = b.Enlarge(toView * new Vector3d(+1.0, -1.0, zmin));
b = b.Enlarge(toView * new Vector3d(-1.0, +1.0, zmin));
b = b.Enlarge(toView * new Vector3d(+1.0, +1.0, zmin));
b = b.Enlarge(toView * new Vector3d(-1.0, -1.0, zmax));
b = b.Enlarge(toView * new Vector3d(+1.0, -1.0, zmax));
b = b.Enlarge(toView * new Vector3d(-1.0, +1.0, zmax));
b = b.Enlarge(toView * new Vector3d(+1.0, +1.0, zmax));
int nx = (int)((b.Max.x - b.Min.x) * GRIDRES_AO / 2);
int ny = (int)((b.Max.y - b.Min.y) * GRIDRES_AO / 2);
int nz = (int)((b.Max.z - b.Min.z) * GRIDRES_AO / 2);
int[] occ = new int[nx * ny * nz];
for (int v = 0; v < nx * ny * nz; ++v)
{
occ[v] = 0;
}
for (int iz = nz - 1; iz >= 0; --iz)
{
var z = b.Min.z + (iz + 0.5) / nz * (b.Max.z - b.Min.z);
for (int iy = 0; iy < ny; ++iy)
{
var y = b.Min.y + (iy + 0.5) / ny * (b.Max.y - b.Min.y);
for (int ix = 0; ix < nx; ++ix)
{
var x = b.Min.x + (ix + 0.5) / nx * (b.Max.x - b.Min.x);
Vector3d p = toVol * new Vector3d(x, y, z);
int val = 0;
int vx = (int)((p.x + 1.0) / 2.0 * GRIDRES_AO);
int vy = (int)((p.y + 1.0) / 2.0 * GRIDRES_AO);
int vz = (int)((p.z + 1.0) / 2.0 * GRIDRES_AO);
if (vx >= 0 && vx < GRIDRES_AO && vy >= 0 && vy < GRIDRES_AO && vz >= 0 && vz < GRIDRES_AO)
{
val = buf[4 * (vx + vy * GRIDRES_AO + vz * GRIDRES_AO * GRIDRES_AO) + 3].EpsilonEquals(255.0f) ? 1 : 0;
}
occ[ix + iy * nx + iz * nx * ny] = val;
if (iz != nz - 1)
{
occ[ix + iy * nx + iz * nx * ny] += occ[ix + iy * nx + (iz + 1) * nx * ny];
}
}
}
}
Parallel.For(0, GRIDRES_AO - 1, options, ix =>
{
var x = -1.0 + (ix + 0.5) / GRIDRES_AO * 2.0;
Parallel.For(0, GRIDRES_AO - 1, options, iy =>
{
var y = -1.0 + (iy + 0.5) / GRIDRES_AO * 2.0;
Parallel.For(0, GRIDRES_AO - 1, options, iz =>
{
var z = -1.0 + (iz + 0.5) / GRIDRES_AO * 2.0;
Vector3d p = toView * new Vector3d(x, y, z);
int vx = (int)((p.x - b.Min.x) / (b.Max.x - b.Min.x) * nx);
int vy = (int)((p.y - b.Min.y) / (b.Max.y - b.Min.y) * ny);
int vz = (int)((p.z - b.Min.z) / (b.Max.z - b.Min.z) * nz);
if (vx >= 0 && vx < nx && vy >= 0 && vy < ny && vz >= 0 && vz < nz)
{
int occN = occ[vx + vy * nx + vz * nx * ny];
if (occN > 6)
{
vocc[ix + iy * GRIDRES_AO + iz * GRIDRES_AO * GRIDRES_AO] -= docc;
}
}
});
});
});
});
});
for (int i = 0; i < GRIDRES_AO; ++i)
{
for (int j = 0; j < GRIDRES_AO; ++j)
{
for (int k = 0; k < GRIDRES_AO; ++k)
{
int off = i + j * GRIDRES_AO + k * GRIDRES_AO * GRIDRES_AO;
if (buf[4 * off + 3].EpsilonEquals(255.0f))
{
var v = Math.Max(vocc[off], 0.0f) * 255;
buf[4 * off] = (float)v;
buf[4 * off + 1] = (float)v;
buf[4 * off + 2] = (float)v;
}
}
}
}
GC.Collect();
var cb = new ComputeBuffer(GRIDRES_AO * GRIDRES_AO * GRIDRES_AO, sizeof(float) * 4);
PreProcessAORT = RTExtensions.CreateRTexture(GRIDRES_AO, 0, RenderTextureFormat.ARGBFloat, FilterMode.Bilinear, TextureWrapMode.Clamp, GRIDRES_AO);
CBUtility.WriteIntoRenderTexture(PreProcessAORT, CBUtility.Channels.RGBA, cb, GodManager.Instance.WriteData);
RTUtility.SaveAs8bit(GRIDRES_AO, GRIDRES_AO * GRIDRES_AO, CBUtility.Channels.RGBA, "TreeAO", DestinationFolder, buf, 0.00392156863f);
cb.ReleaseAndDisposeBuffer();
Debug.Log("Precomputing AO Completed!");
}
/// <summary>
/// Generates the wave spectrum based on the
/// settings wind speed, wave amp and wave age.
/// If these values change this function must be called again.
/// </summary>
void GenerateWavesSpectrum()
{
// Slope variance due to all waves, by integrating over the full spectrum.
float theoreticSlopeVariance = 0.0f;
float k = 5e-3f;
while (k < 1e3f)
{
float nextK = k * 1.001f;
theoreticSlopeVariance += k * k * Spectrum(k, 0, true) * (nextK - k);
k = nextK;
}
float[] spectrum01 = new float[m_size * m_size * 4];
float[] spectrum23 = new float[m_size * m_size * 4];
int idx;
float i;
float j;
float totalSlopeVariance = 0.0f;
Vector2 sample12XY;
Vector2 sample12ZW;
Vector2 sample34XY;
Vector2 sample34ZW;
UnityEngine.Random.seed = 0;
for (int x = 0; x < m_size; x++)
{
for (int y = 0; y < m_size; y++)
{
idx = x + y * m_size;
i = (x >= m_size / 2) ? (float)(x - m_size) : (float)x;
j = (y >= m_size / 2) ? (float)(y - m_size) : (float)y;
sample12XY = GetSpectrumSample(i, j, m_gridSizes.x, Mathf.PI / m_gridSizes.x);
sample12ZW = GetSpectrumSample(i, j, m_gridSizes.y, Mathf.PI * m_fsize / m_gridSizes.x);
sample34XY = GetSpectrumSample(i, j, m_gridSizes.z, Mathf.PI * m_fsize / m_gridSizes.y);
sample34ZW = GetSpectrumSample(i, j, m_gridSizes.w, Mathf.PI * m_fsize / m_gridSizes.z);
spectrum01[idx * 4 + 0] = sample12XY.x;
spectrum01[idx * 4 + 1] = sample12XY.y;
spectrum01[idx * 4 + 2] = sample12ZW.x;
spectrum01[idx * 4 + 3] = sample12ZW.y;
spectrum23[idx * 4 + 0] = sample34XY.x;
spectrum23[idx * 4 + 1] = sample34XY.y;
spectrum23[idx * 4 + 2] = sample34ZW.x;
spectrum23[idx * 4 + 3] = sample34ZW.y;
i *= 2.0f * Mathf.PI;
j *= 2.0f * Mathf.PI;
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.x, j / m_gridSizes.x, sample12XY);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.y, j / m_gridSizes.y, sample12ZW);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.z, j / m_gridSizes.z, sample34XY);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.w, j / m_gridSizes.w, sample34ZW);
}
}
//Write floating point data into render texture
ComputeBuffer buffer = new ComputeBuffer(m_size * m_size, sizeof(float) * 4);
buffer.SetData(spectrum01);
CBUtility.WriteIntoRenderTexture(m_spectrum01, 4, buffer, m_writeData);
buffer.SetData(spectrum23);
CBUtility.WriteIntoRenderTexture(m_spectrum23, 4, buffer, m_writeData);
buffer.Release();
m_varianceShader.SetFloat("_SlopeVarianceDelta", 0.5f * (theoreticSlopeVariance - totalSlopeVariance));
m_varianceShader.SetFloat("_VarianceSize", (float)m_varianceSize);
m_varianceShader.SetFloat("_Size", m_fsize);
m_varianceShader.SetVector("_GridSizes", m_gridSizes);
m_varianceShader.SetTexture(0, "_Spectrum01", m_spectrum01);
m_varianceShader.SetTexture(0, "_Spectrum23", m_spectrum23);
m_varianceShader.SetTexture(0, "des", m_variance);
m_varianceShader.Dispatch(0, m_varianceSize / 4, m_varianceSize / 4, m_varianceSize / 4);
}
void Start()
{
ComputeShader writeData = Resources.Load <ComputeShader>("Ocean/WriteData");
if (writeData == null)
{
throw new ArgumentException("Could not find Write compute shader in the resources folder");
}
m_skyMap = new RenderTexture(512, 512, 0, RenderTextureFormat.ARGBHalf);
m_skyMap.filterMode = FilterMode.Trilinear;
m_skyMap.wrapMode = TextureWrapMode.Clamp;
m_skyMap.anisoLevel = 9;
m_skyMap.useMipMap = true;
m_skyMap.Create();
m_transmittance = new RenderTexture(TRANSMITTANCE_WIDTH, TRANSMITTANCE_HEIGHT, 0, RenderTextureFormat.ARGBHalf);
m_transmittance.wrapMode = TextureWrapMode.Clamp;
m_transmittance.filterMode = FilterMode.Bilinear;
m_transmittance.enableRandomWrite = true;
m_transmittance.Create();
m_irradiance = new RenderTexture(IRRADIANCE_WIDTH, IRRADIANCE_HEIGHT, 0, RenderTextureFormat.ARGBHalf);
m_irradiance.wrapMode = TextureWrapMode.Clamp;
m_irradiance.filterMode = FilterMode.Bilinear;
m_irradiance.enableRandomWrite = true;
m_irradiance.Create();
m_inscatter = new RenderTexture(INSCATTER_WIDTH, INSCATTER_HEIGHT, 0, RenderTextureFormat.ARGBHalf);
m_inscatter.volumeDepth = INSCATTER_DEPTH;
m_inscatter.wrapMode = TextureWrapMode.Clamp;
m_inscatter.filterMode = FilterMode.Bilinear;
m_inscatter.isVolume = true;
m_inscatter.enableRandomWrite = true;
m_inscatter.Create();
//Transmittance is responsible for the change in the sun color as it moves
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
string path = Application.dataPath + "/Resources/Textures/transmittance.raw";
ComputeBuffer buffer = new ComputeBuffer(TRANSMITTANCE_WIDTH * TRANSMITTANCE_HEIGHT, sizeof(float) * TRANSMITTANCE_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_transmittance, TRANSMITTANCE_CHANNELS, path, buffer, writeData);
buffer.Release();
//Iirradiance is responsible for the change in the sky color as the sun moves
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
path = Application.dataPath + "/Resources/Textures/irradiance.raw";
buffer = new ComputeBuffer(IRRADIANCE_WIDTH * IRRADIANCE_HEIGHT, sizeof(float) * IRRADIANCE_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_irradiance, IRRADIANCE_CHANNELS, path, buffer, writeData);
buffer.Release();
//Inscatter is responsible for the change in the sky color as the sun moves
//The raw file is a 4D array of 32 bit floats with a range of 0 to 1.589844
//As there is not such thing as a 4D texture the data is packed into a 2D texture
//and the shader manually performs the sample for the 3rd and 4th dimension
path = Application.dataPath + "/Resources/Textures/inscatter.raw";
buffer = new ComputeBuffer(INSCATTER_WIDTH * INSCATTER_HEIGHT * INSCATTER_DEPTH, sizeof(float) * INSCATTER_CHANNELS);
CBUtility.WriteIntoRenderTexture(m_inscatter, INSCATTER_CHANNELS, path, buffer, writeData);
buffer.Release();
InitMaterial(m_skyMapMaterial);
InitMaterial(m_skyMaterial);
//ocean mat needs some of these uniforms so may as well set them here
InitMaterial(m_oceanMaterial);
}
private void GenerateWavesSpectrum()
{
// Slope variance due to all waves, by integrating over the full spectrum.
// Used by the BRDF rendering model
var theoreticSlopeVariance = 0.0f;
var k = 5e-3f;
while (k < 1e3f)
{
var nextK = k * 1.001f;
theoreticSlopeVariance += k * k * Spectrum(k, 0, true) * (nextK - k);
k = nextK;
}
var spectrum01 = new float[FourierGridSize * FourierGridSize * 4];
var spectrum23 = new float[FourierGridSize * FourierGridSize * 4];
int idx;
float i;
float j;
float totalSlopeVariance = 0.0f;
Vector2 sample12XY = Vector2.zero;
Vector2 sample12ZW = Vector2.zero;
Vector2 sample34XY = Vector2.zero;
Vector2 sample34ZW = Vector2.zero;
Random.InitState(0);
for (int x = 0; x < FourierGridSize; x++)
{
for (int y = 0; y < FourierGridSize; y++)
{
idx = x + y * FourierGridSize;
i = (x >= FourierGridSize / 2) ? (float)(x - FourierGridSize) : (float)x;
j = (y >= FourierGridSize / 2) ? (float)(y - FourierGridSize) : (float)y;
sample12XY = GetSpectrumSample(i, j, GridSizes.x, Mathf.PI / GridSizes.x);
sample12ZW = GetSpectrumSample(i, j, GridSizes.y, Mathf.PI * MapSize / GridSizes.x);
sample34XY = GetSpectrumSample(i, j, GridSizes.z, Mathf.PI * MapSize / GridSizes.y);
sample34ZW = GetSpectrumSample(i, j, GridSizes.w, Mathf.PI * MapSize / GridSizes.z);
spectrum01[idx * 4 + 0] = sample12XY.x;
spectrum01[idx * 4 + 1] = sample12XY.y;
spectrum01[idx * 4 + 2] = sample12ZW.x;
spectrum01[idx * 4 + 3] = sample12ZW.y;
spectrum23[idx * 4 + 0] = sample34XY.x;
spectrum23[idx * 4 + 1] = sample34XY.y;
spectrum23[idx * 4 + 2] = sample34ZW.x;
spectrum23[idx * 4 + 3] = sample34ZW.y;
i *= 2.0f * Mathf.PI;
j *= 2.0f * Mathf.PI;
totalSlopeVariance += GetSlopeVariance(i / GridSizes.x, j / GridSizes.x, sample12XY);
totalSlopeVariance += GetSlopeVariance(i / GridSizes.y, j / GridSizes.y, sample12ZW);
totalSlopeVariance += GetSlopeVariance(i / GridSizes.z, j / GridSizes.z, sample34XY);
totalSlopeVariance += GetSlopeVariance(i / GridSizes.w, j / GridSizes.w, sample34ZW);
}
}
//Write floating point data into render texture
var buffer = new ComputeBuffer(FourierGridSize * FourierGridSize, sizeof(float) * 4);
buffer.SetData(spectrum01);
CBUtility.WriteIntoRenderTexture(Spectrum01, CBUtility.Channels.RGBA, buffer, GodManager.Instance.WriteData);
buffer.SetData(spectrum23);
CBUtility.WriteIntoRenderTexture(Spectrum23, CBUtility.Channels.RGBA, buffer, GodManager.Instance.WriteData);
buffer.Release();
var varianceShader = GodManager.Instance.Variance;
varianceShader.SetFloat("_SlopeVarianceDelta", 0.5f * (theoreticSlopeVariance - totalSlopeVariance));
varianceShader.SetFloat("_VarianceSize", (float)VarianceSize);
varianceShader.SetFloat("_Size", MapSize);
varianceShader.SetVector("_GridSizes", GridSizes);
varianceShader.SetTexture(0, "_Spectrum01", Spectrum01);
varianceShader.SetTexture(0, "_Spectrum23", Spectrum23);
varianceShader.SetTexture(0, "des", Variance);
varianceShader.Dispatch(0, VarianceSize / 4, VarianceSize / 4, VarianceSize / 4);
// Find the maximum value for slope variance
buffer = new ComputeBuffer(VarianceSize * VarianceSize * VarianceSize, sizeof(float));
CBUtility.ReadFromRenderTexture(Variance, CBUtility.Channels.R, buffer, GodManager.Instance.ReadData);
var varianceData = new float[VarianceSize * VarianceSize * VarianceSize];
buffer.GetData(varianceData);
MaxSlopeVariance = 0.0f;
for (int v = 0; v < VarianceSize * VarianceSize * VarianceSize; v++)
{
MaxSlopeVariance = Mathf.Max(MaxSlopeVariance, varianceData[v]);
}
buffer.Release();
}
/// <summary>
/// Creates a series of textures that contain random noise.
/// These texture tile together using the Wang Tiling method.
/// Used by the UpSample shader to create fractal noise for the terrain elevations.
/// </summary>
private void CreateDemNoise()
{
int tileWidth = Cache.GetStorage(0).TileSize;
m_noiseTextures = new RenderTexture[6];
int[] layers = new int[] { 0, 1, 3, 5, 7, 15 };
int rand = 1234567;
for (int nl = 0; nl < 6; ++nl)
{
float[] noiseArray = new float[tileWidth * tileWidth];
int l = layers[nl];
ComputeBuffer buffer = new ComputeBuffer(tileWidth * tileWidth, sizeof(float));
// corners
for (int j = 0; j < tileWidth; ++j)
{
for (int i = 0; i < tileWidth; ++i)
{
noiseArray[i + j * tileWidth] = 0.0f;
}
}
// bottom border
Random.InitState((l & 1) == 0 ? 7654321 : 5647381);
for (int h = 5; h <= tileWidth / 2; ++h)
{
float N = Rand();
noiseArray[h + 2 * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + 2 * tileWidth] = N;
}
for (int v = 3; v < 5; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
float N = Rand();
noiseArray[h + v * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (4 - v) * tileWidth] = N;
}
}
// right border
Random.InitState((l & 2) == 0 ? 7654321 : 5647381);
for (int v = 5; v <= tileWidth / 2; ++v)
{
float N = Rand();
noiseArray[(tileWidth - 3) + v * tileWidth] = N;
noiseArray[(tileWidth - 3) + (tileWidth - 1 - v) * tileWidth] = N;
}
for (int h = tileWidth - 4; h >= tileWidth - 5; --h)
{
for (int v = 5; v < tileWidth - 5; ++v)
{
float N = Rand();
noiseArray[h + v * tileWidth] = N;
noiseArray[(2 * tileWidth - 6 - h) + (tileWidth - 1 - v) * tileWidth] = N;
}
}
// top border
Random.InitState((l & 4) == 0 ? 7654321 : 5647381);
for (int h = 5; h <= tileWidth / 2; ++h)
{
float N = Rand();
noiseArray[h + (tileWidth - 3) * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (tileWidth - 3) * tileWidth] = N;
}
for (int v = tileWidth - 2; v < tileWidth; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
float N = Rand();
noiseArray[h + v * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (2 * tileWidth - 6 - v) * tileWidth] = N;
}
}
// left border
Random.InitState((l & 8) == 0 ? 7654321 : 5647381);
for (int v = 5; v <= tileWidth / 2; ++v)
{
float N = Rand();
noiseArray[2 + v * tileWidth] = N;
noiseArray[2 + (tileWidth - 1 - v) * tileWidth] = N;
}
for (int h = 1; h >= 0; --h)
{
for (int v = 5; v < tileWidth - 5; ++v)
{
float N = Rand();
noiseArray[h + v * tileWidth] = N;
noiseArray[(4 - h) + (tileWidth - 1 - v) * tileWidth] = N;
}
}
// center
Random.InitState(rand);
for (int v = 5; v < tileWidth - 5; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
float N = Rand();
noiseArray[h + v * tileWidth] = N;
}
}
//randomize for next texture
rand = (rand * 1103515245 + 12345) & 0x7FFFFFFF;
m_noiseTextures[nl] = new RenderTexture(tileWidth, tileWidth, 0, RenderTextureFormat.RHalf);
m_noiseTextures[nl].wrapMode = TextureWrapMode.Repeat;
m_noiseTextures[nl].filterMode = FilterMode.Point;
m_noiseTextures[nl].enableRandomWrite = true;
m_noiseTextures[nl].Create();
//write data into render texture
buffer.SetData(noiseArray);
CBUtility.WriteIntoRenderTexture(m_noiseTextures[nl], 1, buffer, World.WriteData);
buffer.Release();
}
}
/// <summary>
/// This function creates the elevations data and is called by the CreateTileTask when the task is run by the schedular
/// The functions needs the tiles parent data to have already been created. If it has not the program will abort.
/// </summary>
public override void DoCreateTile(int level, int tx, int ty, List <Slot> slot)
{
GPUSlot gpuSlot = slot[0] as GPUSlot;
int tileWidth = gpuSlot.Owner.TileSize;
int b = Border * 2 + 1;
int tileSize = tileWidth - b;
GPUSlot parentGpuSlot = null;
Tile parentTile = null;
if (level > 0)
{
parentTile = FindTile(level - 1, tx / 2, ty / 2, false, true);
if (parentTile != null)
{
parentGpuSlot = parentTile.GetSlot(0) as GPUSlot;
}
else
{
throw new MissingTileException("Find parent tile failed");
}
}
float rootQuadSize = (float)TerrainNode.Root.Length;
Vector4 tileWSD = new Vector4();
tileWSD.x = tileWidth;
tileWSD.y = rootQuadSize / (1 << level) / tileSize;
tileWSD.z = (tileWidth - b) / (World.GridResolution - 1.0f);
tileWSD.w = 0.0f;
m_upsampleMat.SetVector(m_uniforms.tileWSD, tileWSD);
if (level > 0)
{
RenderTexture tex = parentGpuSlot.Texture;
m_upsampleMat.SetTexture(m_uniforms.coarseLevelSampler, tex);
float dx = (tx % 2) * (tileSize / 2);
float dy = (ty % 2) * (tileSize / 2);
Vector4 coarseLevelOSL = new Vector4(dx / tex.width, dy / tex.height, 1.0f / tex.width, 0.0f);
m_upsampleMat.SetVector(m_uniforms.coarseLevelOSL, coarseLevelOSL);
}
else
{
m_upsampleMat.SetVector(m_uniforms.coarseLevelOSL, new Vector4(-1.0f, -1.0f, -1.0f, -1.0f));
}
if (m_residualProducer != null && m_residualProducer.HasTile(level, tx, ty))
{
Tile residualTile = m_residualProducer.FindTile(level, tx, ty, false, true);
CPUSlot <float> residualSlot = null;
if (residualTile != null)
{
residualSlot = residualTile.GetSlot(0) as CPUSlot <float>;
}
else
{
throw new MissingTileException("Find residual tile failed");
}
//Must clear residual tex before use or terrain will have artifacts at the seams. Not sure why.
RTUtility.ClearColor(m_residualTex, Color.clear);
m_residualBuffer.SetData(residualSlot.Data);
CBUtility.WriteIntoRenderTexture(m_residualTex, 1, m_residualBuffer, World.WriteData);
m_upsampleMat.SetTexture(m_uniforms.residualSampler, m_residualTex);
m_upsampleMat.SetVector(m_uniforms.residualOSH, new Vector4(0.25f / tileWidth, 0.25f / tileWidth, 2.0f / tileWidth, 1.0f));
}
else
{
m_upsampleMat.SetTexture(m_uniforms.residualSampler, null);
m_upsampleMat.SetVector(m_uniforms.residualOSH, new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
}
float rs = level < m_noiseAmp.Length ? m_noiseAmp[level] : 0.0f;
int noiseL = 0;
int face = TerrainNode.Face;
if (rs != 0.0f)
{
if (face == 1)
{
int offset = 1 << level;
int bottomB = m_noise.Noise2D(tx + 0.5f, ty + offset) > 0.0f ? 1 : 0;
int rightB = (tx == offset - 1 ? m_noise.Noise2D(ty + offset + 0.5f, offset) : m_noise.Noise2D(tx + 1.0f, ty + offset + 0.5f)) > 0.0f ? 2 : 0;
int topB = (ty == offset - 1 ? m_noise.Noise2D((3.0f * offset - 1.0f - tx) + 0.5f, offset) : m_noise.Noise2D(tx + 0.5f, ty + offset + 1.0f)) > 0.0f ? 4 : 0;
int leftB = (tx == 0 ? m_noise.Noise2D((4.0f * offset - 1.0f - ty) + 0.5f, offset) : m_noise.Noise2D(tx, ty + offset + 0.5f)) > 0.0f ? 8 : 0;
noiseL = bottomB + rightB + topB + leftB;
}
else if (face == 6)
{
int offset = 1 << level;
int bottomB = (ty == 0 ? m_noise.Noise2D((3.0f * offset - 1.0f - tx) + 0.5f, 0) : m_noise.Noise2D(tx + 0.5f, ty - offset)) > 0.0f ? 1 : 0;
int rightB = (tx == offset - 1.0f ? m_noise.Noise2D((2.0f * offset - 1.0f - ty) + 0.5f, 0) : m_noise.Noise2D(tx + 1.0f, ty - offset + 0.5f)) > 0.0f ? 2 : 0;
int topB = m_noise.Noise2D(tx + 0.5f, ty - offset + 1.0f) > 0.0f ? 4 : 0;
int leftB = (tx == 0 ? m_noise.Noise2D(3.0f * offset + ty + 0.5f, 0) : m_noise.Noise2D(tx, ty - offset + 0.5f)) > 0.0f ? 8 : 0;
noiseL = bottomB + rightB + topB + leftB;
}
else
{
int offset = (1 << level) * (face - 2);
int bottomB = m_noise.Noise2D(tx + offset + 0.5f, ty) > 0.0f ? 1 : 0;
int rightB = m_noise.Noise2D((tx + offset + 1) % (4 << level), ty + 0.5f) > 0.0f ? 2 : 0;
int topB = m_noise.Noise2D(tx + offset + 0.5f, ty + 1.0f) > 0.0f ? 4 : 0;
int leftB = m_noise.Noise2D(tx + offset, ty + 0.5f) > 0.0f ? 8 : 0;
noiseL = bottomB + rightB + topB + leftB;
}
}
int[] noiseRs = new int[] { 0, 0, 1, 0, 2, 0, 1, 0, 3, 3, 1, 3, 2, 2, 1, 0 };
int noiseR = noiseRs[noiseL];
int[] noiseLs = new int[] { 0, 1, 1, 2, 1, 3, 2, 4, 1, 2, 3, 4, 2, 4, 4, 5 };
noiseL = noiseLs[noiseL];
m_upsampleMat.SetTexture(m_uniforms.noiseSampler, m_noiseTextures[noiseL]);
m_upsampleMat.SetVector(m_uniforms.noiseUVLH, new Vector4(noiseR, (noiseR + 1) % 4, 0, rs));
Graphics.Blit(null, gpuSlot.Texture, m_upsampleMat);
base.DoCreateTile(level, tx, ty, slot);
}
private void GenerateWavesSpectrum()
{
// Slope variance due to all waves, by integrating over the full spectrum.
// Used by the BRDF rendering model
float theoreticSlopeVariance = 0.0f;
float k = 5e-3f;
while (k < 1e3f)
{
float nextK = k * 1.001f;
theoreticSlopeVariance += k * k * Spectrum(k, 0, true) * (nextK - k);
k = nextK;
}
float[] spectrum01 = new float[m_fourierGridSize * m_fourierGridSize * 4];
float[] spectrum23 = new float[m_fourierGridSize * m_fourierGridSize * 4];
int idx;
float i;
float j;
float totalSlopeVariance = 0.0f;
Vector2 sample12XY;
Vector2 sample12ZW;
Vector2 sample34XY;
Vector2 sample34ZW;
Random.InitState(0);
for (int x = 0; x < m_fourierGridSize; x++)
{
for (int y = 0; y < m_fourierGridSize; y++)
{
idx = x + y * m_fourierGridSize;
i = (x >= m_fourierGridSize / 2) ? (float)(x - m_fourierGridSize) : (float)x;
j = (y >= m_fourierGridSize / 2) ? (float)(y - m_fourierGridSize) : (float)y;
sample12XY = GetSpectrumSample(i, j, m_gridSizes.x, Mathf.PI / m_gridSizes.x);
sample12ZW = GetSpectrumSample(i, j, m_gridSizes.y, Mathf.PI * m_fsize / m_gridSizes.x);
sample34XY = GetSpectrumSample(i, j, m_gridSizes.z, Mathf.PI * m_fsize / m_gridSizes.y);
sample34ZW = GetSpectrumSample(i, j, m_gridSizes.w, Mathf.PI * m_fsize / m_gridSizes.z);
spectrum01[idx * 4 + 0] = sample12XY.x;
spectrum01[idx * 4 + 1] = sample12XY.y;
spectrum01[idx * 4 + 2] = sample12ZW.x;
spectrum01[idx * 4 + 3] = sample12ZW.y;
spectrum23[idx * 4 + 0] = sample34XY.x;
spectrum23[idx * 4 + 1] = sample34XY.y;
spectrum23[idx * 4 + 2] = sample34ZW.x;
spectrum23[idx * 4 + 3] = sample34ZW.y;
i *= 2.0f * Mathf.PI;
j *= 2.0f * Mathf.PI;
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.x, j / m_gridSizes.x, sample12XY);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.y, j / m_gridSizes.y, sample12ZW);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.z, j / m_gridSizes.z, sample34XY);
totalSlopeVariance += GetSlopeVariance(i / m_gridSizes.w, j / m_gridSizes.w, sample34ZW);
}
}
//Write floating point data into render texture
ComputeBuffer buffer = new ComputeBuffer(m_fourierGridSize * m_fourierGridSize, sizeof(float) * 4);
buffer.SetData(spectrum01);
CBUtility.WriteIntoRenderTexture(m_spectrum01, 4, buffer, World.WriteData);
buffer.SetData(spectrum23);
CBUtility.WriteIntoRenderTexture(m_spectrum23, 4, buffer, World.WriteData);
buffer.Release();
m_varianceShader.SetFloat("_SlopeVarianceDelta", 0.5f * (theoreticSlopeVariance - totalSlopeVariance));
m_varianceShader.SetFloat("_VarianceSize", (float)m_varianceSize);
m_varianceShader.SetFloat("_Size", m_fsize);
m_varianceShader.SetVector("_GridSizes", m_gridSizes);
m_varianceShader.SetTexture(0, "_Spectrum01", m_spectrum01);
m_varianceShader.SetTexture(0, "_Spectrum23", m_spectrum23);
m_varianceShader.SetTexture(0, "des", m_variance);
m_varianceShader.Dispatch(0, m_varianceSize / 4, m_varianceSize / 4, m_varianceSize / 4);
//Find the maximum value for slope variance
buffer = new ComputeBuffer(m_varianceSize * m_varianceSize * m_varianceSize, sizeof(float));
CBUtility.ReadFromRenderTexture(m_variance, 1, buffer, World.ReadData);
float[] varianceData = new float[m_varianceSize * m_varianceSize * m_varianceSize];
buffer.GetData(varianceData);
m_maxSlopeVariance = 0.0f;
for (int v = 0; v < m_varianceSize * m_varianceSize * m_varianceSize; v++)
{
m_maxSlopeVariance = Mathf.Max(m_maxSlopeVariance, varianceData[v]);
}
buffer.Release();
}
/// <summary>
/// This function creates the elevations data and is called by the <see cref="Tile.Tasks.CreateTileTask"/> when the task is run by the <see cref="Utilities.Schedular"/>.
/// The functions needs the tiles parent data to have already been created. If it has not the program will abort.
/// </summary>
/// <param name="level"></param>
/// <param name="tx"></param>
/// <param name="ty"></param>
/// <param name="slot"></param>
public override void DoCreateTile(int level, int tx, int ty, List <TileStorage.Slot> slot)
{
var gpuSlot = slot[0] as GPUTileStorage.GPUSlot;
if (gpuSlot == null)
{
throw new NullReferenceException("gpuSlot");
}
var tileWidth = gpuSlot.Owner.TileSize;
var tileSize = tileWidth - (1 + GetBorder() * 2);
GPUTileStorage.GPUSlot parentGpuSlot = null;
var upsample = level > 0;
var parentTile = FindTile(level - 1, tx / 2, ty / 2, false, true);
// TODO : Make it classwide...
var residualTileSize = GetTileSize(0);
var residualTexture = RTExtensions.CreateRTexture(residualTileSize, 0, RenderTextureFormat.RFloat, FilterMode.Point, TextureWrapMode.Clamp);
var residualBuffer = new ComputeBuffer(residualTileSize * residualTileSize, sizeof(float));
if (ResidualProducer != null)
{
if (ResidualProducer.HasTile(level, tx, ty))
{
if (ResidualProducer.IsGPUProducer)
{
GPUTileStorage.GPUSlot residualGpuSlot = null;
var residualTile = ResidualProducer.FindTile(level, tx, ty, false, true);
if (residualTile != null)
{
residualGpuSlot = residualTile.GetSlot(0) as GPUTileStorage.GPUSlot;
}
else
{
throw new MissingTileException("Find residual tile failed");
}
if (residualGpuSlot == null)
{
throw new MissingTileException("Find parent tile failed");
}
UpSampleMaterial.SetTexture("_ResidualSampler", residualGpuSlot.Texture);
UpSampleMaterial.SetVector("_ResidualOSH", new Vector4(0.25f / (float)tileWidth, 0.25f / (float)tileWidth, 2.0f / (float)tileWidth, 1.0f));
}
else
{
CPUTileStorage.CPUSlot <float> residualCPUSlot = null;
var residualTile = ResidualProducer.FindTile(level, tx, ty, false, true);
if (residualTile != null)
{
residualCPUSlot = residualTile.GetSlot(0) as CPUTileStorage.CPUSlot <float>;
}
else
{
throw new MissingTileException("Find residual tile failed");
}
if (residualCPUSlot == null)
{
throw new MissingTileException("Find parent tile failed");
}
residualBuffer.SetData(residualCPUSlot.Data);
RTUtility.ClearColor(residualTexture);
CBUtility.WriteIntoRenderTexture(residualTexture, CBUtility.Channels.R, residualBuffer, GodManager.Instance.WriteData);
//RTUtility.SaveAs8bit(residualTileSize, residualTileSize, CBUtility.Channels.R, string.Format("Residual_{0}_{1}-{2}-{3}", TerrainNode.name, level, tx, ty), "/Resources/Preprocess/Textures/Debug/", residualCPUSlot.Data);
UpSampleMaterial.SetTexture("_ResidualSampler", residualTexture);
UpSampleMaterial.SetVector("_ResidualOSH", new Vector4(0.25f / (float)tileWidth, 0.25f / (float)tileWidth, 2.0f / (float)tileWidth, 1.0f));
}
}
else
{
UpSampleMaterial.SetTexture("_ResidualSampler", null);
UpSampleMaterial.SetVector("_ResidualOSH", new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
}
}
else
{
UpSampleMaterial.SetTexture("_ResidualSampler", null);
UpSampleMaterial.SetVector("_ResidualOSH", new Vector4(0.0f, 0.0f, 1.0f, 0.0f));
}
if (upsample)
{
if (parentTile != null)
{
parentGpuSlot = parentTile.GetSlot(0) as GPUTileStorage.GPUSlot;
}
else
{
throw new MissingTileException(string.Format("Find parent tile failed! {0}:{1}-{2}", level - 1, tx / 2, ty / 2));
}
}
if (parentGpuSlot == null && upsample)
{
throw new NullReferenceException("parentGpuSlot");
}
var rootQuadSize = TerrainNode.TerrainQuadRoot.Length;
var tileWSD = Vector4.zero;
tileWSD.x = (float)tileWidth;
tileWSD.y = (float)rootQuadSize / (float)(1 << level) / (float)tileSize;
tileWSD.z = (float)tileSize / (float)(TerrainNode.ParentBody.GridResolution - 1);
tileWSD.w = 0.0f;
var tileScreenSize = (0.5 + (float)GetBorder()) / (tileWSD.x - 1 - (float)GetBorder() * 2);
var tileSD = new Vector2d(tileScreenSize, 1.0 + tileScreenSize * 2.0);
UpSampleMaterial.SetVector("_TileWSD", tileWSD);
UpSampleMaterial.SetVector("_TileSD", tileSD.ToVector2());
if (upsample)
{
var parentTexture = parentGpuSlot.Texture;
var dx = (float)(tx % 2) * (float)(tileSize / 2.0f);
var dy = (float)(ty % 2) * (float)(tileSize / 2.0f);
var coarseLevelOSL = new Vector4(dx / (float)parentTexture.width, dy / (float)parentTexture.height, 1.0f / (float)parentTexture.width, 0.0f);
UpSampleMaterial.SetTexture("_CoarseLevelSampler", parentTexture);
UpSampleMaterial.SetVector("_CoarseLevelOSL", coarseLevelOSL);
}
else
{
UpSampleMaterial.SetTexture("_CoarseLevelSampler", null);
UpSampleMaterial.SetVector("_CoarseLevelOSL", new Vector4(-1.0f, -1.0f, -1.0f, -1.0f));
}
var rs = level < NoiseAmplitudes.Length ? NoiseAmplitudes[level] : 0.0f;
var offset = new Vector4d(((double)tx / (1 << level) - 0.5) * rootQuadSize,
((double)ty / (1 << level) - 0.5) * rootQuadSize,
rootQuadSize / (1 << level),
TerrainNode.ParentBody.Size);
UpSampleMaterial.SetFloat("_Amplitude", rs / (TerrainNode.ParentBody.Amplitude / 10.0f));
UpSampleMaterial.SetFloat("_Frequency", TerrainNode.ParentBody.Frequency * (1 << level));
UpSampleMaterial.SetVector("_Offset", offset.ToVector4());
UpSampleMaterial.SetMatrix("_LocalToWorld", TerrainNode.FaceToLocal.ToMatrix4x4());
if (TerrainNode.ParentBody.TCCPS != null)
{
TerrainNode.ParentBody.TCCPS.SetUniforms(UpSampleMaterial);
}
Graphics.Blit(null, gpuSlot.Texture, UpSampleMaterial);
residualTexture.ReleaseAndDestroy();
residualBuffer.ReleaseAndDisposeBuffer();
base.DoCreateTile(level, tx, ty, slot);
}
/// <summary>
/// Creates a series of textures that contain random noise.
/// These texture tile together using the Wang Tiling method.
/// Used by the UpSample shader to create fractal noise for the terrain elevations.
/// </summary>
private void CreateDemNoise()
{
var tileWidth = Cache.GetStorage(0).TileSize;
NoiseTextures = new RenderTexture[6];
var layers = new int[] { 0, 1, 3, 5, 7, 15 };
var rand = 1234567;
for (byte nl = 0; nl < 6; ++nl)
{
var noiseArray = new float[tileWidth * tileWidth];
var l = layers[nl];
var buffer = new ComputeBuffer(tileWidth * tileWidth, sizeof(float));
for (int j = 0; j < tileWidth; ++j)
{
for (int i = 0; i < tileWidth; ++i)
{
noiseArray[i + j * tileWidth] = Noise.Noise2D(i, j);
}
}
// Corners
for (int j = 0; j < tileWidth; ++j)
{
for (int i = 0; i < tileWidth; ++i)
{
noiseArray[i + j * tileWidth] = 0.0f;
}
}
// Bottom border
Random.InitState((l & 1) == 0 ? 7654321 : 5647381);
for (int h = 5; h <= tileWidth / 2; ++h)
{
var N = RandomValue();
noiseArray[h + 2 * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + 2 * tileWidth] = N;
}
for (int v = 3; v < 5; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
var N = RandomValue();
noiseArray[h + v * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (4 - v) * tileWidth] = N;
}
}
// Right border
Random.InitState((l & 2) == 0 ? 7654321 : 5647381);
for (int v = 5; v <= tileWidth / 2; ++v)
{
var N = RandomValue();
noiseArray[(tileWidth - 3) + v * tileWidth] = N;
noiseArray[(tileWidth - 3) + (tileWidth - 1 - v) * tileWidth] = N;
}
for (int h = tileWidth - 4; h >= tileWidth - 5; --h)
{
for (int v = 5; v < tileWidth - 5; ++v)
{
var N = RandomValue();
noiseArray[h + v * tileWidth] = N;
noiseArray[(2 * tileWidth - 6 - h) + (tileWidth - 1 - v) * tileWidth] = N;
}
}
// Top border
Random.InitState((l & 4) == 0 ? 7654321 : 5647381);
for (int h = 5; h <= tileWidth / 2; ++h)
{
var N = RandomValue();
noiseArray[h + (tileWidth - 3) * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (tileWidth - 3) * tileWidth] = N;
}
for (int v = tileWidth - 2; v < tileWidth; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
var N = RandomValue();
noiseArray[h + v * tileWidth] = N;
noiseArray[(tileWidth - 1 - h) + (2 * tileWidth - 6 - v) * tileWidth] = N;
}
}
// Left border
Random.InitState((l & 8) == 0 ? 7654321 : 5647381);
for (int v = 5; v <= tileWidth / 2; ++v)
{
var N = RandomValue();
noiseArray[2 + v * tileWidth] = N;
noiseArray[2 + (tileWidth - 1 - v) * tileWidth] = N;
}
for (int h = 1; h >= 0; --h)
{
for (int v = 5; v < tileWidth - 5; ++v)
{
var N = RandomValue();
noiseArray[h + v * tileWidth] = N;
noiseArray[(4 - h) + (tileWidth - 1 - v) * tileWidth] = N;
}
}
// Center
Random.InitState(rand);
for (int v = 5; v < tileWidth - 5; ++v)
{
for (int h = 5; h < tileWidth - 5; ++h)
{
var N = RandomValue();
noiseArray[h + v * tileWidth] = N;
}
}
// Randomize for next texture
rand = (rand * 1103515245 + 12345) & 0x7FFFFFFF;
NoiseTextures[nl] = RTExtensions.CreateRTexture(new Vector2(tileWidth, tileWidth), 0, RenderTextureFormat.RHalf, FilterMode.Point, TextureWrapMode.Repeat);
// Write data into render texture
buffer.SetData(noiseArray);
CBUtility.WriteIntoRenderTexture(NoiseTextures[nl], 1, buffer, GodManager.Instance.WriteData);
buffer.ReleaseAndDisposeBuffer();
}
}
protected override void Start()
{
base.Start();
m_mesh = MeshFactory.MakePlane(2, 2, MeshFactory.PLANE.XY, false);
m_mesh.bounds = new Bounds(Vector3.zero, new Vector3(1e8f, 1e8f, 1e8f));
//The sky map is used to create a reflection of the sky for objects that need it (like the ocean)
m_skyMap = new RenderTexture(512, 512, 0, RenderTextureFormat.ARGBHalf);
m_skyMap.filterMode = FilterMode.Trilinear;
m_skyMap.wrapMode = TextureWrapMode.Clamp;
m_skyMap.anisoLevel = 9;
m_skyMap.useMipMap = true;
//m_skyMap.mipMapBias = -0.5f;
m_skyMap.Create();
//Transmittance is responsible for the change in the sun color as it moves
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
string path = Application.dataPath + m_filePath + "/transmittance.raw";
m_transmittance = new RenderTexture(TRANSMITTANCE_W, TRANSMITTANCE_H, 0, RenderTextureFormat.ARGBHalf);
m_transmittance.wrapMode = TextureWrapMode.Clamp;
m_transmittance.filterMode = FilterMode.Bilinear;
m_transmittance.enableRandomWrite = true;
m_transmittance.Create();
ComputeBuffer buffer = new ComputeBuffer(TRANSMITTANCE_W * TRANSMITTANCE_H, sizeof(float) * 3);
CBUtility.WriteIntoRenderTexture(m_transmittance, 3, path, buffer, World.WriteData);
buffer.Release();
//Iirradiance is responsible for the change in the sky color as the sun moves
//The raw file is a 2D array of 32 bit floats with a range of 0 to 1
path = Application.dataPath + m_filePath + "/irradiance.raw";
m_irradiance = new RenderTexture(SKY_W, SKY_H, 0, RenderTextureFormat.ARGBHalf);
m_irradiance.wrapMode = TextureWrapMode.Clamp;
m_irradiance.filterMode = FilterMode.Bilinear;
m_irradiance.enableRandomWrite = true;
m_irradiance.Create();
buffer = new ComputeBuffer(SKY_W * SKY_H, sizeof(float) * 3);
CBUtility.WriteIntoRenderTexture(m_irradiance, 3, path, buffer, World.WriteData);
buffer.Release();
//Inscatter is responsible for the change in the sky color as the sun moves
//The raw file is a 4D array of 32 bit floats with a range of 0 to 1.589844
//As there is not such thing as a 4D texture the data is packed into a 3D texture
//and the shader manually performs the sample for the 4th dimension
path = Application.dataPath + m_filePath + "/inscatter.raw";
m_inscatter = new RenderTexture(RES_MU_S * RES_NU, RES_MU, 0, RenderTextureFormat.ARGBHalf);
m_inscatter.volumeDepth = RES_R;
m_inscatter.wrapMode = TextureWrapMode.Clamp;
m_inscatter.filterMode = FilterMode.Bilinear;
m_inscatter.dimension = TextureDimension.Tex3D;
m_inscatter.enableRandomWrite = true;
m_inscatter.Create();
buffer = new ComputeBuffer(RES_MU_S * RES_NU * RES_MU * RES_R, sizeof(float) * 4);
CBUtility.WriteIntoRenderTexture(m_inscatter, 4, path, buffer, World.WriteData);
buffer.Release();
InitUniforms(m_skyMaterial);
InitUniforms(m_skyMapMaterial);
}