/// <summary>
/// Save the actual data in table as a raw file to be loaded and used during run time.
/// </summary>
private void SaveAsRaw(int size, int channels, string fileName, RenderTexture rtex)
{
ComputeBuffer buffer = new ComputeBuffer(size, sizeof(float) * channels);
CBUtility.ReadFromRenderTexture(rtex, channels, buffer, m_readData);
float[] data = new float[size * channels];
buffer.GetData(data);
byte[] byteArray = new byte[size * 4 * channels];
System.Buffer.BlockCopy(data, 0, byteArray, 0, byteArray.Length);
System.IO.File.WriteAllBytes(Application.dataPath + m_filePath + fileName + ".raw", byteArray);
buffer.Release();
}
public static void SaveAsRaw(int size, CBUtility.Channels channels, string fileName, string filePath, RenderTexture rtex, ComputeShader readDataComputeShader)
{
var channelsSize = (byte)channels;
var buffer = new ComputeBuffer(size, sizeof(float) * channelsSize);
CBUtility.ReadFromRenderTexture(rtex, channels, buffer, readDataComputeShader);
var data = new float[size * channelsSize];
buffer.GetData(data);
var byteArray = new byte[size * 4 * channelsSize];
Buffer.BlockCopy(data, 0, byteArray, 0, byteArray.Length);
File.WriteAllBytes(Application.dataPath + filePath + fileName + ".raw", byteArray);
buffer.Release();
}
public static void SaveAs8bit(int width, int height, CBUtility.Channels channels, string fileName, string filePath, RenderTexture rtex, ComputeShader readDataComputeShader, float scale = 1.0f)
{
var channelsSize = (byte)channels;
var buffer = new ComputeBuffer(width * height, sizeof(float) * channelsSize);
CBUtility.ReadFromRenderTexture(rtex, channels, buffer, readDataComputeShader);
var data = new float[width * height * channelsSize];
buffer.GetData(data);
var texture = new Texture2D(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
var color = new Color(0, 0, 0, 1);
color.r = data[(x + y * width) * channelsSize + 0];
if (channelsSize > 1)
{
color.g = data[(x + y * width) * channelsSize + 1];
}
if (channelsSize > 2)
{
color.b = data[(x + y * width) * channelsSize + 2];
}
texture.SetPixel(x, y, color * scale);
}
}
texture.Apply();
var bytes = texture.EncodeToPNG();
File.WriteAllBytes(Application.dataPath + filePath + fileName + ".png", bytes);
buffer.Release();
}
private void ReadFromGPU(int numGrids)
{
if (!this.disableReadBack && this.readSdr == null)
{
Ocean.LogWarning("Trying to read GPU displacement data but the read shader is null");
}
bool flag = SystemInfo.graphicsShaderLevel >= 50 && SystemInfo.supportsComputeShaders;
if (!this.disableReadBack && this.readSdr != null && this.m_readBuffer != null && flag)
{
InterpolatedArray2f[] readDisplacements = this.DisplacementBuffer.GetReadDisplacements();
if (numGrids > 0)
{
CBUtility.ReadFromRenderTexture(this.m_displacementMaps[0], 3, this.m_readBuffer, this.readSdr);
this.m_readBuffer.GetData(readDisplacements[0].Data);
}
else
{
readDisplacements[0].Clear();
}
if (numGrids > 1)
{
CBUtility.ReadFromRenderTexture(this.m_displacementMaps[1], 3, this.m_readBuffer, this.readSdr);
this.m_readBuffer.GetData(readDisplacements[1].Data);
}
else
{
readDisplacements[1].Clear();
}
if (numGrids > 2)
{
CBUtility.ReadFromRenderTexture(this.m_displacementMaps[2], 3, this.m_readBuffer, this.readSdr);
this.m_readBuffer.GetData(readDisplacements[2].Data);
}
else
{
readDisplacements[2].Clear();
}
if (numGrids > 3)
{
}
}
}
/// <summary>
/// Saves a 8 bit version of the table.
/// Only used to get a visible image for debugging.
/// </summary>
private void SaveAs8bit(int width, int height, int channels, string fileName, RenderTexture rtex, float scale = 1.0f)
{
ComputeBuffer buffer = new ComputeBuffer(width * height, sizeof(float) * channels);
CBUtility.ReadFromRenderTexture(rtex, channels, buffer, m_readData);
float[] data = new float[width * height * channels];
buffer.GetData(data);
Texture2D tex = new Texture2D(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
Color col = new Color(0, 0, 0, 1);
col.r = data[(x + y * width) * channels + 0];
if (channels > 1)
{
col.g = data[(x + y * width) * channels + 1];
}
if (channels > 2)
{
col.b = data[(x + y * width) * channels + 2];
}
tex.SetPixel(x, y, col * scale);
}
}
tex.Apply();
byte[] bytes = tex.EncodeToPNG();
System.IO.File.WriteAllBytes(Application.dataPath + m_filePath + fileName + ".png", bytes);
buffer.Release();
}
private void PrecomputeSkyboxAlltogether()
{
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;
bool firstTime = false;
if (_skyboxData == null)
{
firstTime = true;
_skyboxData = new float[texSize * channels];
}
ComputeBuffer buffer = new ComputeBuffer(texSize, floatSize * channels); // 4 bytes for float and 4 channels
CBUtility.ReadFromRenderTexture(_skyboxLUT2, channels, buffer, FrostbiteReadShader);
float[] data = new float[texSize * channels];
buffer.GetData(data);
if (firstTime)
{
for (int i = 0; i < _skyboxData.Length; ++i)
{
_skyboxData[i] = data[i];
}
}
else
{
for (int i = 0; i < _skyboxData.Length; ++i)
{
_skyboxData[i] += data[i];
}
}
buffer.Release();
}
/// <summary>
/// Updates the <see cref="TerrainQuad.ZMin"/> and <see cref="TerrainQuad.ZMax"/> values.
/// Used to create a better fitting bounding box.
/// Is not essental and can be disabled if retriving the heights data from the GPU is causing performance issues.
/// </summary>
private void UpdateMinMax()
{
// If no quads need read back or if disabled return
if (NeedsReadBackDictionary.Count == 0 || !EnableReadBack)
{
return;
}
// Make a copy of all the keys of the tiles that need to be read back
var ids = new Tile.Id[NeedsReadBackDictionary.Count];
NeedsReadBackDictionary.Keys.CopyTo(ids, 0);
// Sort the keys by there level, lowest -> highest
Array.Sort(ids, new Tile.ComparerID());
var count = 0;
// Foreach key read back the tiles data until the maxReadBacksPerFrame limit is reached
foreach (var id in ids)
{
var treeZ = NeedsReadBackDictionary[id];
// If elevations container already contains key then data has been read back before so just reapply the [min, max] values to TerranQuad
if (ElevationsDicionary.ContainsKey(id))
{
var info = ElevationsDicionary.Get(id);
treeZ.TerrainQuad.ZMin = info.Min;
treeZ.TerrainQuad.ZMax = info.Max;
NeedsReadBackDictionary.Remove(id);
}
else
{
// If for some reason the tile is null remove from container and continue
if (treeZ.Tile == null)
{
NeedsReadBackDictionary.Remove(id);
continue;
}
var slot = treeZ.Tile.Slot[0] as GPUTileStorage.GPUSlot;
// If for some reason this is not a GPUSlot remove and continue
if (slot == null)
{
NeedsReadBackDictionary.Remove(id);
continue;
}
var texture = slot.Texture;
var size = texture.width * texture.height;
var elevationInfo = new ElevationInfo();
elevationInfo.Elevations = new float[size];
// Read back heights data from texture
CBUtility.ReadFromRenderTexture(texture, CBUtility.Channels.R, ElevationsBuffer, GodManager.Instance.ReadData);
// Copy into elevations info
ElevationsBuffer.GetData(elevationInfo.Elevations);
// Find the min/max values
for (int i = 0; i < size; i++)
{
if (elevationInfo.Elevations[i] < elevationInfo.Min)
{
elevationInfo.Min = elevationInfo.Elevations[i];
}
if (elevationInfo.Elevations[i] > elevationInfo.Max)
{
elevationInfo.Max = elevationInfo.Elevations[i];
}
}
// Update TerrainQuad
treeZ.TerrainQuad.ZMin = elevationInfo.Min;
treeZ.TerrainQuad.ZMax = elevationInfo.Max;
// Store elevations to prevent having to read back again soon
// Add to end of container
ElevationsDicionary.AddLast(id, elevationInfo);
NeedsReadBackDictionary.Remove(id);
count++;
// If the number of rad back to do per frame has hit the limit stop loop.
if (count >= MaxReadBacksPerFrame)
{
break;
}
}
}
// If the number of elevation info to store has exceded limit remove from start of container
while (ElevationsDicionary.Count() > MaxStoredElevations)
{
ElevationsDicionary.RemoveFirst();
}
}
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();
}
public void SaveTextureAsKTX(RenderTexture rtex, String name, bool tile3D = false)
{
int texDepth = rtex.volumeDepth;
int texWidth = rtex.width;
int texHeight = rtex.height;
int floatSize = sizeof(float);
int channels = 4;
bool tileEnabled = tile3D && texDepth > 1;
if (tileEnabled)
{
texWidth *= texDepth;
texDepth = 1;
}
int texSize = texWidth * texHeight * texDepth;
ComputeBuffer buffer = new ComputeBuffer(texSize, floatSize * channels); // 4 bytes for float and 4 channels
CBUtility.ReadFromRenderTexture(rtex, channels, buffer, FrostbiteReadShader);
float[] data = new float[texSize * channels];
buffer.GetData(data);
Byte[] header =
{
0xAB, 0x4B, 0x54, 0x58, // first four bytes of Byte[12] identifier
0x20, 0x31, 0x31, 0xBB, // next four bytes of Byte[12] identifier
0x0D, 0x0A, 0x1A, 0x0A, // final four bytes of Byte[12] identifier
0x01, 0x02, 0x03, 0x04, // Byte[4] endianess (Big endian in this case)
};
FileStream fs = new FileStream("Assets/Textures/" + name + ".ktx", FileMode.OpenOrCreate);
BinaryWriter writer = new BinaryWriter(fs);
writer.Write(header);
UInt32 glType = 0x140B; // HALF
UInt32 glTypeSize = 2; // 2 bytes
UInt32 glFormat = 0x1908; // RGBA
UInt32 glInterformat = 0x881A; // RGBA FLOAT16
UInt32 glBaseInternalFormat = 0x1908; // RGBA
UInt32 width = (UInt32)texWidth;
UInt32 height = (UInt32)texHeight;
UInt32 depth = (UInt32)(texDepth == 1 ? 0 : texDepth);
UInt32 numOfArrElem = 0;
UInt32 numOfFace = 1;
UInt32 numOfMip = 1;
UInt32 bytesOfKeyVal = 0;
writer.Write(glType);
writer.Write(glTypeSize);
writer.Write(glFormat);
writer.Write(glInterformat);
writer.Write(glBaseInternalFormat);
writer.Write(width);
writer.Write(height);
writer.Write(depth);
writer.Write(numOfArrElem);
writer.Write(numOfFace);
writer.Write(numOfMip);
writer.Write(bytesOfKeyVal);
UInt32 imageSize = (UInt32)(texSize * channels * glTypeSize);
writer.Write(imageSize);
if (tileEnabled)
{
for (int j = 0; j < rtex.height; j++)
{
for (int k = 0; k < rtex.volumeDepth; k++)
{
for (int i = 0; i < rtex.width; i++)
{
int startIndex = k * rtex.width * rtex.height * channels + j * rtex.width * channels + i * channels;
writer.Write(Half.GetBytes((Half)data[startIndex]));
writer.Write(Half.GetBytes((Half)data[startIndex + 1]));
writer.Write(Half.GetBytes((Half)data[startIndex + 2]));
writer.Write(Half.GetBytes((Half)data[startIndex + 3]));
}
}
}
}
else
{
for (int i = 0; i < data.Length; ++i)
{
writer.Write(Half.GetBytes((Half)data[i]));
}
}
writer.Close();
fs.Close();
buffer.Release();
}
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();
}