private TemporalFrameCache GetFrameCache(int frameIndex, RenderView renderView)
{
TemporalFrameCache cache;
// Find free temporal cache
for (int i = 0; i < frameCache.Count; i++)
{
cache = frameCache[i];
if (cache.RenderView == renderView && cache.LastUsageFrame != frameIndex)
{
cache.LastUsageFrame = frameIndex;
return(cache);
}
}
// Create new one
cache = new TemporalFrameCache();
cache.RenderView = renderView;
cache.LastUsageFrame = frameIndex;
cache.PrevViewProjection = renderView.ViewProjection;
frameCache.Add(cache);
return(cache);
}
private TemporalFrameCache GetFrameCache(int frameIndex, CameraComponent camera)
{
TemporalFrameCache cache;
// Find free temporal cache
for (int i = 0; i < frameCache.Count; i++)
{
cache = frameCache[i];
if (cache.Camera == camera && cache.LastUsageFrame != frameIndex)
{
cache.LastUsageFrame = frameIndex;
return(cache);
}
}
// Create new one
cache = new TemporalFrameCache();
cache.Camera = camera;
cache.LastUsageFrame = frameIndex;
cache.PrevViewProjection = camera.ViewProjectionMatrix;
frameCache.Add(cache);
return(cache);
}
private TemporalFrameCache Prepare(RenderDrawContext context, Texture outputBuffer)
{
TemporalFrameCache cache = null;
var renderView = context.RenderContext.RenderView;
Matrix viewMatrix = renderView.View;
Matrix projectionMatrix = renderView.Projection;
Matrix viewProjectionMatrix = renderView.ViewProjection;
Matrix inverseViewMatrix = Matrix.Invert(viewMatrix);
Matrix inverseViewProjectionMatrix = Matrix.Invert(viewProjectionMatrix);
Vector4 eye = inverseViewMatrix.Row4;
float nearclip = renderView.NearClipPlane;
float farclip = renderView.FarClipPlane;
Vector4 viewInfo = new Vector4(1.0f / projectionMatrix.M11, 1.0f / projectionMatrix.M22, farclip / (farclip - nearclip), (-farclip * nearclip) / (farclip - nearclip) / farclip);
Vector3 cameraPos = new Vector3(eye.X, eye.Y, eye.Z);
float temporalTime = 0;
if (TemporalEffect)
{
var gameTime = context.RenderContext.Time;
double time = gameTime.Total.TotalSeconds;
// Keep time in smaller range to prevent temporal noise errors
const double scale = 10;
double integral = Math.Round(time / scale) * scale;
time -= integral;
temporalTime = (float)time;
cache = GetFrameCache(gameTime.FrameCount, renderView);
}
var traceBufferSize = GetBufferResolution(outputBuffer, RayTracePassResolution);
var roughnessFade = 1 - MathUtil.Clamp(GlossinessThreshold, 0.0f, 1.0f);
var maxTraceSamples = MathUtil.Clamp(MaxSteps, 1, 128);
// ViewInfo : x-1/Projection[0,0] y-1/Projection[1,1] z-(Far / (Far - Near) w-(-Far * Near) / (Far - Near) / Far)
rayTracePassShader.Parameters.Set(SSLRCommonKeys.ViewFarPlane, farclip);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.RoughnessFade, roughnessFade);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.MaxTraceSamples, maxTraceSamples);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.WorldAntiSelfOcclusionBias, WorldAntiSelfOcclusionBias);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.BRDFBias, BRDFBias);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.TemporalTime, temporalTime);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.CameraPosWS, ref cameraPos);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.ViewInfo, ref viewInfo);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.V, ref viewMatrix);
rayTracePassShader.Parameters.Set(SSLRCommonKeys.IVP, ref inverseViewProjectionMatrix);
rayTracePassShader.Parameters.Set(SSLRRayTracePassKeys.VP, ref viewProjectionMatrix);
rayTracePassShader.Parameters.Set(SSLRRayTracePassKeys.EdgeFadeFactor, EdgeFadeFactor);
resolvePassShader.Parameters.Set(SSLRCommonKeys.MaxColorMiplevel, Texture.CalculateMipMapCount(0, outputBuffer.Width, outputBuffer.Height) - 1);
resolvePassShader.Parameters.Set(SSLRCommonKeys.TraceSizeMax, Math.Max(traceBufferSize.Width, traceBufferSize.Height) / 2.0f);
resolvePassShader.Parameters.Set(SSLRCommonKeys.ViewFarPlane, farclip);
resolvePassShader.Parameters.Set(SSLRCommonKeys.RoughnessFade, roughnessFade);
resolvePassShader.Parameters.Set(SSLRCommonKeys.TemporalTime, temporalTime);
resolvePassShader.Parameters.Set(SSLRCommonKeys.BRDFBias, BRDFBias);
resolvePassShader.Parameters.Set(SSLRCommonKeys.CameraPosWS, ref cameraPos);
resolvePassShader.Parameters.Set(SSLRCommonKeys.ViewInfo, ref viewInfo);
resolvePassShader.Parameters.Set(SSLRCommonKeys.V, ref viewMatrix);
resolvePassShader.Parameters.Set(SSLRCommonKeys.IVP, ref inverseViewProjectionMatrix);
resolvePassShader.Parameters.Set(SSLRKeys.ResolveSamples, MathUtil.Clamp(ResolveSamples, 1, 8));
resolvePassShader.Parameters.Set(SSLRKeys.ReduceHighlights, ReduceHighlights);
if (TemporalEffect)
{
temporalPassShader.Parameters.Set(SSLRTemporalPassKeys.IVP, ref inverseViewProjectionMatrix);
temporalPassShader.Parameters.Set(SSLRTemporalPassKeys.TemporalResponse, TemporalResponse);
temporalPassShader.Parameters.Set(SSLRTemporalPassKeys.TemporalScale, TemporalScale);
if (cache != null)
{
temporalPassShader.Parameters.Set(SSLRTemporalPassKeys.prevVP, ref cache.PrevViewProjection);
cache.PrevViewProjection = viewProjectionMatrix;
}
}
combinePassShader.Parameters.Set(SSLRCommonKeys.ViewFarPlane, farclip);
combinePassShader.Parameters.Set(SSLRCommonKeys.CameraPosWS, ref cameraPos);
combinePassShader.Parameters.Set(SSLRCommonKeys.ViewInfo, ref viewInfo);
combinePassShader.Parameters.Set(SSLRCommonKeys.V, ref viewMatrix);
combinePassShader.Parameters.Set(SSLRCommonKeys.IVP, ref inverseViewProjectionMatrix);
return(cache);
}