//require a PRNG compute buffer for camera.
public ComputeBuffer RequirePRNGStates(Camera vCamera)
{
var CameraId = vCamera.GetInstanceID();
if (_PRNGStates.TryGetValue(CameraId, out var OutBuffer))
{
return(OutBuffer);
}
OutBuffer = new ComputeBuffer(vCamera.pixelWidth * vCamera.pixelHeight, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var Mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
Mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var Data = new uint[vCamera.pixelWidth * vCamera.pixelHeight * 4];
for (var i = 0; i < vCamera.pixelWidth * vCamera.pixelHeight * 4; ++i)
{
Data[i] = Mt19937.genrand_int32();
}
OutBuffer.SetData(Data);
_PRNGStates.Add(CameraId, OutBuffer);
return(OutBuffer);
}
/// <summary>
/// require a PRNG compute buffer for camera.
/// </summary>
/// <param name="width">the buffer width.</param>
/// <param name="height">the buffer height.</param>
/// <returns></returns>
public ComputeBuffer RequirePRNGStates(Camera camera)
{
var id = camera.GetInstanceID();
if (_PRNGStates.TryGetValue(id, out var buffer))
{
return(buffer);
}
buffer = new ComputeBuffer(camera.pixelWidth * camera.pixelHeight, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var _mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
_mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var data = new uint[camera.pixelWidth * camera.pixelHeight * 4];
for (var i = 0; i < camera.pixelWidth * camera.pixelHeight * 4; ++i)
{
data[i] = _mt19937.genrand_int32();
}
buffer.SetData(data);
_PRNGStates.Add(id, buffer);
return(buffer);
}
void CreatePRNGStates()
{
var mapSize = renderTextures[0].width;
PRNGStates = new ComputeBuffer(mapSize * mapSize, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var _mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
_mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var data = new uint[mapSize * mapSize * 4];
for (var i = 0; i < mapSize * mapSize * 4; ++i)
{
data[i] = _mt19937.genrand_int32();
}
PRNGStates.SetData(data);
}
