void DispatchRays()
{
// update frame index and start path tracer
_rayTracingShader.SetInt("_FrameIndex", _frameIndex);
_rayTracingShader.SetShaderPass("DxrPass"); //
// using e.g. ForwardDXR here will require binding all variables correctly, e.g. _EnvLightDatasRT
// _rayTracingShader.SetShaderPass("ForwardDXR");
// var lightCluster = HDRenderPipeline.currentPipeline.RequestLightCluster();
// Shader.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
// Shader.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
// Shader.SetGlobalBuffer(HDShaderIDs._EnvLightDatasRT, lightCluster.GetEnvLightDatas());
// start one thread for each pixel on screen
_rayTracingShader.Dispatch("MyRaygenShader", _camera.pixelWidth, _camera.pixelHeight, 1, _camera);
// update accumulation material
_accumulationMaterial.SetTexture("_CurrentFrame", _dxrTarget);
_accumulationMaterial.SetTexture("_Accumulation", _accumulationTarget1);
_accumulationMaterial.SetInt("_FrameIndex", _frameIndex++);
// accumulate current raytracing result
Graphics.Blit(_dxrTarget, _accumulationTarget2, _accumulationMaterial);
// switch accumulate textures
var temp = _accumulationTarget1;
_accumulationTarget1 = _accumulationTarget2;
_accumulationTarget2 = temp;
GetComponent <MeshRenderer>().sharedMaterial.mainTexture = resultTexture == ResultTexture.DxrTarget ? _dxrTarget : _accumulationTarget1;
}
void OnRenderImage(RenderTexture src, RenderTexture dest)
{
if (!SystemInfo.supportsRayTracing || !rayTracingShader)
{
Debug.Log("The RayTracing API is not supported by this GPU or by the current graphics API.");
Graphics.Blit(src, dest);
return;
}
if (rayTracingAccelerationStructure == null)
{
return;
}
if (prevCameraMatrix != Camera.main.cameraToWorldMatrix)
{
convergenceStep = 0;
}
if (prevBounceCountOpaque != bounceCountOpaque)
{
convergenceStep = 0;
}
if (prevBounceCountTransparent != bounceCountTransparent)
{
convergenceStep = 0;
}
// Not really needed per frame if the scene is static.
rayTracingAccelerationStructure.Build();
rayTracingShader.SetShaderPass("PathTracing");
Shader.SetGlobalInt(Shader.PropertyToID("g_BounceCountOpaque"), (int)bounceCountOpaque);
Shader.SetGlobalInt(Shader.PropertyToID("g_BounceCountTransparent"), (int)bounceCountTransparent);
// Input
rayTracingShader.SetAccelerationStructure(Shader.PropertyToID("g_AccelStruct"), rayTracingAccelerationStructure);
rayTracingShader.SetFloat(Shader.PropertyToID("g_Zoom"), Mathf.Tan(Mathf.Deg2Rad * Camera.main.fieldOfView * 0.5f));
rayTracingShader.SetFloat(Shader.PropertyToID("g_AspectRatio"), cameraWidth / (float)cameraHeight);
rayTracingShader.SetInt(Shader.PropertyToID("g_ConvergenceStep"), convergenceStep);
rayTracingShader.SetInt(Shader.PropertyToID("g_FrameIndex"), Time.frameCount);
rayTracingShader.SetTexture(Shader.PropertyToID("g_EnvTex"), envTexture);
// Output
rayTracingShader.SetTexture(Shader.PropertyToID("g_Radiance"), rayTracingOutput);
rayTracingShader.Dispatch("MainRayGenShader", (int)cameraWidth, (int)cameraHeight, 1, Camera.main);
Graphics.Blit(rayTracingOutput, dest);
convergenceStep++;
prevCameraMatrix = Camera.main.cameraToWorldMatrix;
prevBounceCountOpaque = bounceCountOpaque;
prevBounceCountTransparent = bounceCountTransparent;
}
private void OnRenderImage(RenderTexture source, RenderTexture destination)
{
CheckNulls();
CheckRenderTexture();
SetShaderProperties();
_RTAS.Update();
shader.Dispatch("RayGen", cam.pixelWidth / (int)resolution, cam.pixelHeight / (int)resolution, 1, cam);
Graphics.Blit(source, destination);
}
void OnRenderImage(RenderTexture source, RenderTexture destination)
{
PathTracingShader.SetInt("_Frame", _Frame);
PathTracingShader.Dispatch("RayGenerationShader", _Camera.pixelWidth, _Camera.pixelHeight, 1, _Camera);
_Material.SetTexture("_MainImage", _RenderTarget0);
_Material.SetTexture("_Accumulation", _RenderTarget1);
_Material.SetInt("_Frame", _Frame++);
Graphics.Blit(_RenderTarget0, _RenderTarget2, _Material);
Graphics.Blit(_RenderTarget2, destination);
var target = _RenderTarget1;
_RenderTarget1 = _RenderTarget2;
_RenderTarget2 = target;
}
/// <summary>
/// Ray tracing to check whether plane1 can see plane2 by GPU.
/// </summary>
/// <param name="plane1">the plane1.</param>
/// <param name="plane2">the plane2.</param>
/// <returns>the result.</returns>
public bool RayTracingPlane2PlaneGPU(Plane plane1, Plane plane2)
{
var viewRect = new Rect(0F, 0F, math.ceil(plane1.size.x / rayTracingStep.x), math.ceil(plane1.size.y / rayTracingStep.x));
var renderTarget = RequireRenderTarget(ref viewRect);
var resultBuffer = RequireResultBuffer();
bakeRayTraceShader.SetShaderPass("PVS");
bakeRayTraceShader.SetAccelerationStructure(_accelerationStructureShaderId, accelerationStructure);
bakeRayTraceShader.SetTexture(_resultShaderId, renderTarget);
bakeRayTraceShader.SetVector(_viewLeftBottomCornerShaderId, plane1.leftBottomCorner);
bakeRayTraceShader.SetVector(_viewRightDirShaderId, plane1.rightDir);
bakeRayTraceShader.SetVector(_viewUpDirShaderId, plane1.upDir);
bakeRayTraceShader.SetVector(_viewSizeShaderId, plane1.size);
bakeRayTraceShader.SetVector(_targetLeftBottomCornerShaderId, plane2.leftBottomCorner);
bakeRayTraceShader.SetVector(_targetRightDirShaderId, plane2.rightDir);
bakeRayTraceShader.SetVector(_targetUpDirShaderId, plane2.upDir);
bakeRayTraceShader.SetVector(_targetSizeShaderId, plane2.size);
bakeRayTraceShader.SetVector(_rayTracingStepShaderId, rayTracingStep);
bakeRayTraceShader.Dispatch("BakeRaygenShader", (int)viewRect.width, (int)viewRect.height, 1);
var data = new byte[]
{
0, 0, 0, 0
};
resultBuffer.SetData(data);
var kernelId = countPixelComputeShader.FindKernel("CSMain");
countPixelComputeShader.SetTexture(kernelId, _pixelsShaderId, renderTarget);
countPixelComputeShader.SetInt(_widthShaderId, (int)viewRect.width);
countPixelComputeShader.SetInt(_heightShaderId, (int)viewRect.height);
countPixelComputeShader.SetBuffer(kernelId, _resultShaderId, resultBuffer);
countPixelComputeShader.GetKernelThreadGroupSizes(kernelId, out var grpSizeX, out var grpSizeY, out var _);
countPixelComputeShader.Dispatch(kernelId, (int)math.ceil(viewRect.width / grpSizeX), (int)math.ceil(viewRect.height / grpSizeY), 1);
resultBuffer.GetData(data);
return(data[0] > 0);
}
public void OnRenderImage(RenderTexture src, RenderTexture dest)
{
var cam = Camera.main;
if (!CheckResources(cam))
{
Graphics.Blit(src, dest);
return;
}
//-- shader pass "RTPass" in material shaders
rtShader.SetShaderPass("RTPass");
//- set global variables, used in all material shaders
Shader.SetGlobalVector(ShaderID._T_minmax, new Vector2(tMin, tMax));
//-- set local RT raygen shader variables
_rtAccStructure.Build();
rtShader.SetAccelerationStructure(ShaderID._SceneAccelerationStructure, _rtAccStructure);
rtShader.SetTexture(ShaderID._RenderTarget, _rtTargetTexture);
rtShader.SetMatrix(ShaderID._InvViewMatrix, cam.cameraToWorldMatrix);
rtShader.SetTexture(ShaderID._EnvironmentTex, environmentCubemap);
rtShader.SetFloat(ShaderID._EnvironmentGamma, Mathf.GammaToLinearSpace(environmentExposure));
rtShader.SetFloat(ShaderID._ShadowBrightness, shadowBrightness);
var camOrigin = cam.transform.position;
var frustumBottomLeftDirWS = (cam.ViewportToWorldPoint(new Vector3(0, 0, cam.nearClipPlane)) - camOrigin).normalized;
var frustumBottomRightDirWS = (cam.ViewportToWorldPoint(new Vector3(1, 0, cam.nearClipPlane)) - camOrigin).normalized;
var frustumTopLeftDirWS = (cam.ViewportToWorldPoint(new Vector3(0, 1, cam.nearClipPlane)) - camOrigin).normalized;
rtShader.SetVector(ShaderID._FrustumBottomLeftDirWS, frustumBottomLeftDirWS);
rtShader.SetVector(ShaderID._FrustumHorizDirWS, frustumBottomRightDirWS - frustumBottomLeftDirWS);
rtShader.SetVector(ShaderID._FrustumVertDirWS, frustumTopLeftDirWS - frustumBottomLeftDirWS);
//-- dispatch ray tracing
rtShader.Dispatch("RaygenShader", cam.pixelWidth, cam.pixelHeight, 1);
Graphics.Blit(_rtTargetTexture, dest);
}
private void OnRenderImage(RenderTexture source, RenderTexture destination)
{
// update frame index and start path tracer
_rayTracingShader.SetInt("_FrameIndex", _frameIndex);
// start one thread for each pixel on screen
_rayTracingShader.Dispatch("MyRaygenShader", _camera.pixelWidth, _camera.pixelHeight, 1, _camera);
// update accumulation material
_accumulationMaterial.SetTexture("_CurrentFrame", _dxrTarget);
_accumulationMaterial.SetTexture("_Accumulation", _accumulationTarget1);
_accumulationMaterial.SetInt("_FrameIndex", _frameIndex++);
// accumulate current raytracing result
Graphics.Blit(_dxrTarget, _accumulationTarget2, _accumulationMaterial);
// display result on screen
Graphics.Blit(_accumulationTarget2, destination);
// switch accumulate textures
var temp = _accumulationTarget1;
_accumulationTarget1 = _accumulationTarget2;
_accumulationTarget2 = temp;
}
void DispatchRays()
{
// update frame index and start path tracer
_rayTracingShader.SetInt("_FrameIndex", _frameIndex);
_rayTracingShader.SetShaderPass("DxrPass"); //
// using e.g. ForwardDXR here will require binding all variables correctly, e.g. _EnvLightDatasRT
// _rayTracingShader.SetShaderPass("ForwardDXR");
// var lightCluster = HDRenderPipeline.currentPipeline.RequestLightCluster();
// Shader.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
// Shader.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
// Shader.SetGlobalBuffer(HDShaderIDs._EnvLightDatasRT, lightCluster.GetEnvLightDatas());
_rayTracingShader.SetFloat("_JitterAmount", resultTexture == ResultTexture.DxrTarget ? 0 : 1);
_rayTracingShader.SetBool("_UseLensData", lensRenderer && lensRenderer.isActiveAndEnabled);
if (lensRenderer)
{
_rayTracingShader.SetMatrix("_DataProviderTransform", lensRenderer.transform.localToWorldMatrix);
_rayTracingShader.SetTexture("_PositionData", lensRenderer.lensPositionTex);
_rayTracingShader.SetTexture("_DirectionData", lensRenderer.lensDirectionTex);
}
else
{
_rayTracingShader.SetTexture("_PositionData", Texture2D.whiteTexture);
_rayTracingShader.SetTexture("_DirectionData", Texture2D.whiteTexture);
}
// start one thread for each pixel on screen
_rayTracingShader.Dispatch("MyRaygenShader", _dxrTarget.width, _dxrTarget.height, 1, _camera);
// update accumulation material
_accumulationMaterial.SetTexture("_CurrentFrame", _dxrTarget);
_accumulationMaterial.SetTexture("_Accumulation", _accumulationTarget1);
_accumulationMaterial.SetInt("_FrameIndex", _frameIndex++);
// accumulate current raytracing result
Graphics.Blit(_dxrTarget, _accumulationTarget2, _accumulationMaterial);
// switch accumulate textures
var temp = _accumulationTarget1;
_accumulationTarget1 = _accumulationTarget2;
_accumulationTarget2 = temp;
// // apply DLSS to the _dxrTarget
// var cmd = new CommandBuffer();
// var initData = new DLSSCommandInitializationData()
// {
// featureFlags = DLSSFeatureFlags.DoSharpening,
// inputRTHeight = (uint)_dxrTarget.height,
// inputRTWidth = (uint)_dxrTarget.width,
// outputRTWidth = (uint)(2 * _dxrTarget.width),
// outputRTHeight = (uint)(2 * _dxrTarget.height),
// quality = DLSSQuality.MaximumPerformance
// };
//
// var context = _nvidiaDevice.CreateFeature(cmd, initData);
// var textureTable = new DLSSTextureTable()
// {
// colorInput = _dxrTarget,
// colorOutput = null,
// depth = null,
// motionVectors = null,
// };
// _nvidiaDevice.ExecuteDLSS(cmd, context, new DLSSTextureTable());
GetComponent <MeshRenderer>().sharedMaterial.mainTexture = resultTexture == ResultTexture.DxrTarget ? _dxrTarget : _accumulationTarget1;
}
