public FastFourierTransform(RenderDrawContext context, int size, FastFourierTransformShaders shaders)
{
_size = size;
_shaders = shaders;
_precomputedData = PrecomputeTwiddleFactorsAndInputIndices(context);
}
public override void Draw(RenderContext context)
{
base.Draw(context);
var graphicsDevice = Services.GetService <IGraphicsDeviceService>().GraphicsDevice;
var sceneSystem = context.Services.GetService <SceneSystem>();
var camera = sceneSystem.TryGetMainCamera();
if (camera == null)
{
return;
}
var time = (float)sceneSystem.Game.UpdateTime.Total.TotalSeconds;
var deltaTime = (float)sceneSystem.Game.UpdateTime.Elapsed.TotalSeconds;
if (_calculateInitialSpectrumShader == null)
{
// TODO: DISPOSE AT SYSTEM REMOVAL!
_calculateInitialSpectrumShader = new ComputeEffectShader(context)
{
ShaderSourceName = "OceanCalculateInitialSpectrum", Name = "OceanCalculateInitialSpectrum"
};
_calculateConjugatedSpectrumShader = new ComputeEffectShader(context)
{
ShaderSourceName = "OceanCalculateConjugatedSpectrum", Name = "OceanCalculateConjugatedSpectrum"
};
_timeDependantSpectrumShader = new ComputeEffectShader(context)
{
ShaderSourceName = "OceanTimeDependentSpectrum", Name = "OceanTimeDependentSpectrum"
};
_fillResultTexturesShader = new ComputeEffectShader(context)
{
ShaderSourceName = "OceanFillResultTextures", Name = "OceanFillResultTextures"
};
_generateMipsShader = new ComputeEffectShader(context)
{
ShaderSourceName = "OceanGenerateMips", Name = "OceanGenerateMips"
};
_fastFourierTransformShaders = new FastFourierTransformShaders(context);
}
Dispatcher.ForEach(ComponentDatas, (pair) =>
{
var component = pair.Key;
var data = pair.Value;
var entity = component.Entity;
var renderDrawContext = context.GetThreadContext();
var commandList = renderDrawContext.CommandList;
// Update shader parameters for wave settings
component.WavesSettings.UpdateShaderParameters();
// Create cascades if dirty
var calculateInitials = component.AlwaysRecalculateInitials;
if (data.Size != component.Size || data.Cascades == null)
{
data.DestroyCascades();
data.Size = component.Size;
// Create noise texture
data.GaussianNoise?.Dispose();
var rng = new Random();
var noise = new Vector2[data.Size * data.Size];
for (int y = 0; y < data.Size; y++)
{
for (int x = 0; x < data.Size; x++)
{
var index = y * data.Size + x;
noise[index] = new Vector2(NormalRandom(rng), NormalRandom(rng));
}
}
data.GaussianNoise = Texture.New2D(graphicsDevice, data.Size, data.Size, PixelFormat.R32G32_Float, noise, TextureFlags.ShaderResource | TextureFlags.UnorderedAccess);