// --------------------------------------------------------------------
void ReleaseOcclusionTextures()
{
m_textureHandlingBuffer.ReleaseTemporaryRT(m_directLightOcclusionMapId);
m_textureHandlingBuffer.ReleaseTemporaryRT(m_directLightShadowMapId);
m_textureHandlingBuffer.ReleaseTemporaryRT(m_directLightDummyTextureId);
m_textureHandlingBuffer.ReleaseTemporaryRT(m_directLightDepthTextureId);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_textureHandlingBuffer);
}
// --------------------------------------------------------------------
public void Render(ScriptableRenderContext context, Camera camera, L2DLDirectLights directLights)
{
if (!m_directLightData.Enabled)
{
return;
}
m_context = context;
m_camera = camera;
// Encapsulate in frame debugger
L2DLRenderHelpers.BeginSample(m_context, m_directLightRenderingBuffer);
{
CoreUtils.SetRenderTarget(m_clearBuffer, L2DLPipelineData.s_cameraDirectLightResultTextureId, L2DLPipelineData.s_cameraDepthTextureId, ClearFlag.Color);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_clearBuffer);
// Directional Lights
L2DLRenderHelpers.BeginSample(m_context, m_directionalLightsBuffer);
foreach (L2DLDirectionalLight directionalLight in directLights.m_directionalLights)
{
GetOcclusionTextures((int)directionalLight.ShadowMapSize); // Probably don't need to do this every time?
RenderOcclusionMapForLight(directionalLight);
RunDirectionalLightOcclusionMapTrace(directionalLight);
RunDirectionalLightRendering(directionalLight);
ReleaseOcclusionTextures();
}
L2DLRenderHelpers.EndSample(m_context, m_directionalLightsBuffer);
// Point Lights
L2DLRenderHelpers.BeginSample(m_context, m_pointLightsBuffer);
foreach (L2DLPointLight pointLight in directLights.m_pointLights)
{
GetOcclusionTextures((int)pointLight.ShadowMapSize);
RenderOcclusionMapForLight(pointLight);
RunPointLightOcclusionMapTrace(pointLight);
RunPointLightRendering(pointLight);
ReleaseOcclusionTextures();
}
L2DLRenderHelpers.EndSample(m_context, m_pointLightsBuffer);
// Spot Lights
L2DLRenderHelpers.BeginSample(m_context, m_spotLightsBuffer);
foreach (L2DLSpotLight spotLight in directLights.m_spotLights)
{
GetOcclusionTextures((int)spotLight.ShadowMapSize);
RenderOcclusionMapForLight(spotLight);
RunSpotLightOcclusionMapTrace(spotLight);
RunSpotLightRendering(spotLight);
ReleaseOcclusionTextures();
}
L2DLRenderHelpers.EndSample(m_context, m_spotLightsBuffer);
// Reset
m_context.SetupCameraProperties(m_camera);
}
L2DLRenderHelpers.EndSample(m_context, m_directLightRenderingBuffer);
}
public void CalculateShadowMap(ScriptableRenderContext _context, CommandBuffer _buffer, L2DLDirectionalLight _directionalLight, L2DLDirectLightData _data, RenderTargetIdentifier i_occlusionMap, RenderTargetIdentifier o_shadowMap)
{
// Here we run the code that calculates the shadow map using standard rendering...
_buffer.SetGlobalTexture("_OcclusionMap", i_occlusionMap);
_buffer.SetGlobalInt("_SamplesPerPixel", m_samplesPerPixel);
_buffer.SetGlobalFloat("_WorldDistPerStep", _directionalLight.Height / m_samplesPerPixel);
_buffer.Blit(i_occlusionMap, o_shadowMap, DirectionalShadowMapRenderMaterial);
L2DLRenderHelpers.ExecuteBuffer(_context, _buffer);
}
// --------------------------------------------------------------------
void RunDirectionalLightRendering(L2DLDirectionalLight directionalLight)
{
SetupCommonLightRenderingProperties(m_directionalLightRenderingBuffer, directionalLight);
m_directionalLightRenderingBuffer.SetRenderTarget(new RenderTargetIdentifier[] { L2DLPipelineData.s_cameraDirectLightResultTextureId, L2DLPipelineData.s_cameraEmissionTextureId }, L2DLPipelineData.s_cameraFakeDepthTextureId);
m_directionalLightRenderingBuffer.Blit(null, BuiltinRenderTextureType.CurrentActive, DirectionalLightPassMaterial);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_directionalLightRenderingBuffer);
}
// --------------------------------------------------------------------
void ReleaseTextures()
{
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraColorTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraEmissionTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraOcclusionTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraAdditionalDataTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraDepthTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraFakeDepthTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraDirectLightResultTextureId);
m_textureHandlerBuffer.ReleaseTemporaryRT(L2DLPipelineData.s_cameraIndirectLightResultTextureId);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_textureHandlerBuffer);
}
// --------------------------------------------------------------------
void RunPointLightRendering(L2DLPointLight pointLight)
{
SetupCommonLightRenderingProperties(m_pointLightRenderingBuffer, pointLight);
m_pointLightRenderingBuffer.SetGlobalFloat("_lightAttenuation", 1f / Mathf.Max(pointLight.Range * pointLight.Range, 0.00001f));
m_pointLightRenderingBuffer.SetGlobalVector("_lightPosition", pointLight.transform.position);
m_pointLightRenderingBuffer.SetGlobalFloat("_maxIntensityOutput", pointLight.MaxIntensityOutput);
m_pointLightRenderingBuffer.SetRenderTarget(new RenderTargetIdentifier[] { L2DLPipelineData.s_cameraDirectLightResultTextureId, L2DLPipelineData.s_cameraEmissionTextureId }, L2DLPipelineData.s_cameraFakeDepthTextureId);
m_pointLightRenderingBuffer.Blit(null, BuiltinRenderTextureType.CurrentActive, PointLightPassMaterial);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_pointLightRenderingBuffer);
}
// Textures
// --------------------------------------------------------------------
void GetOcclusionTextures(int _size)
{
RenderTextureDescriptor mapDescriptor = new RenderTextureDescriptor(_size, _size, RenderTextureFormat.ARGBHalf)
{
useMipMap = m_directLightData.ShadowMapCalculator.OcclusionMapGenerateMips,
autoGenerateMips = m_directLightData.ShadowMapCalculator.OcclusionMapGenerateMips,
enableRandomWrite = m_directLightData.ShadowMapCalculator.OcclusionMapRandomAccess,
};
m_textureHandlingBuffer.GetTemporaryRT(m_directLightOcclusionMapId, mapDescriptor, m_directLightData.ShadowMapCalculator.OcclusionMapFilterMode);
m_textureHandlingBuffer.GetTemporaryRT(m_directLightShadowMapId, mapDescriptor, m_directLightData.ShadowMapCalculator.OcclusionMapFilterMode);
m_textureHandlingBuffer.GetTemporaryRT(m_directLightDummyTextureId, _size, _size, 0, FilterMode.Bilinear, RenderTextureFormat.ARGBHalf);
m_textureHandlingBuffer.GetTemporaryRT(m_directLightDepthTextureId, _size, _size, 0, FilterMode.Bilinear, RenderTextureFormat.ARGBHalf);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_textureHandlingBuffer);
}
// --------------------------------------------------------------------
public void CalculateShadowMap(ScriptableRenderContext _context, CommandBuffer _buffer, L2DLSpotLight _spotLight, L2DLDirectLightData _data, RenderTargetIdentifier i_occlusionMap, RenderTargetIdentifier o_shadowMap)
{
if (!L2DLRenderHelpers.SupportsComputeShaders())
{
return;
}
ReloadComputeShaders();
int occlusionTraceComputeKernel = m_spotLightOcclusionTraceCompute.FindKernel("SpotLightOcclusionTrace");
SetupCommonComputeShaderProperties(_buffer, m_spotLightOcclusionTraceCompute, occlusionTraceComputeKernel, _spotLight, _data);
_buffer.SetComputeFloatParam(m_spotLightOcclusionTraceCompute, "_WorldDistPerStep", _spotLight.Range / (int)_spotLight.ShadowMapSize);
_buffer.DispatchCompute(m_spotLightOcclusionTraceCompute, occlusionTraceComputeKernel, (int)_spotLight.ShadowMapSize / 64, 1, 1);
L2DLRenderHelpers.ExecuteBuffer(_context, _buffer);
}
// --------------------------------------------------------------------
void RenderOcclusionMapForLight(IL2DLDirectLight directLight)
{
L2DLRenderHelpers.BeginSample(m_context, m_occlusionMapRenderingBuffer);
{
m_context.SetupCameraProperties(directLight.ShadowCamera);
if (!directLight.ShadowCamera.TryGetCullingParameters(out m_cullingParameters))
{
return;
}
m_cullingResults = m_context.Cull(ref m_cullingParameters);
CoreUtils.SetRenderTarget(m_clearBuffer, new RenderTargetIdentifier[] { m_directLightDummyTextureId, m_directLightOcclusionMapId }, m_directLightDepthTextureId, ClearFlag.All);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_clearBuffer);
L2DLRenderHelpers.DrawAllRenderers(m_context, m_cullingResults);
}
L2DLRenderHelpers.EndSample(m_context, m_occlusionMapRenderingBuffer);
}
// --------------------------------------------------------------------
void RenderStep_PresentFinalImage()
{
// Push the RT we've written on to the camera target
switch (TextureToView)
{
case L2DLBufferTextures.None:
m_presentFinalImageBuffer.SetGlobalTexture("_Color", L2DLPipelineData.s_cameraColorTextureId);
m_presentFinalImageBuffer.SetGlobalTexture("_DirectLight", L2DLPipelineData.s_cameraDirectLightResultTextureId);
m_presentFinalImageBuffer.SetGlobalTexture("_IndirectLight", L2DLPipelineData.s_cameraIndirectLightResultTextureId);
List <LPVIterationData> iterationData = m_indirectLightData.IndirectLightCalculator.LPVIterationData;
m_presentFinalImageBuffer.SetGlobalInt("_IndirectLightMip", iterationData[iterationData.Count - 1].MipLevel);
m_presentFinalImageBuffer.Blit(null, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.CombineMaterial);
break;
case L2DLBufferTextures.Colour:
m_presentFinalImageBuffer.SetGlobalTexture("_MainTex", L2DLPipelineData.s_cameraColorTextureId);
m_presentFinalImageBuffer.Blit(L2DLPipelineData.s_cameraColorTextureId, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.BlitMaterial);
break;
case L2DLBufferTextures.Emission:
m_presentFinalImageBuffer.SetGlobalTexture("_MainTex", L2DLPipelineData.s_cameraEmissionTextureId);
m_presentFinalImageBuffer.Blit(L2DLPipelineData.s_cameraEmissionTextureId, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.BlitMaterial);
break;
case L2DLBufferTextures.Occlusion:
m_presentFinalImageBuffer.SetGlobalTexture("_MainTex", L2DLPipelineData.s_cameraOcclusionTextureId);
m_presentFinalImageBuffer.Blit(L2DLPipelineData.s_cameraOcclusionTextureId, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.BlitMaterial);
break;
case L2DLBufferTextures.AdditionalData:
m_presentFinalImageBuffer.SetGlobalTexture("_MainTex", L2DLPipelineData.s_cameraAdditionalDataTextureId);
m_presentFinalImageBuffer.Blit(L2DLPipelineData.s_cameraAdditionalDataTextureId, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.BlitMaterial);
break;
case L2DLBufferTextures.Depth:
m_presentFinalImageBuffer.SetGlobalTexture("_MainTex", L2DLPipelineData.s_cameraDepthTextureId);
m_presentFinalImageBuffer.Blit(L2DLPipelineData.s_cameraDepthTextureId, BuiltinRenderTextureType.CameraTarget, L2DLPipelineData.BlitMaterial);
break;
}
L2DLRenderHelpers.ExecuteBuffer(m_context, m_presentFinalImageBuffer);
}
// --------------------------------------------------------------------
public void Render(ScriptableRenderContext context, Camera camera)
{
if (!m_indirectLightData.Enabled)
{
return;
}
m_context = context;
m_camera = camera;
// Encapsulate in frame debugger
L2DLRenderHelpers.BeginSample(m_context, m_indirectLightRenderingBuffer);
{
m_indirectLightData.IndirectLightCalculator?.CalculateIndirectLight(
m_context,
m_indirectLightRenderingBuffer,
m_camera,
L2DLPipelineData.s_cameraEmissionTextureId,
L2DLPipelineData.s_cameraOcclusionTextureId,
L2DLPipelineData.s_cameraIndirectLightResultTextureId);
}
L2DLRenderHelpers.EndSample(m_context, m_indirectLightRenderingBuffer);
}
// Textures need to be gotten at the start of the cameras rendering and held on to until the end so that all steps can access them
// --------------------------------------------------------------------
void GetTextures()
{
RenderTextureDescriptor bufferTextureDescriptor = new RenderTextureDescriptor(m_camera.pixelWidth, m_camera.pixelHeight, RenderTextureFormat.ARGBHalf, 0)
{
enableRandomWrite = true,
useMipMap = true,
autoGenerateMips = false,
};
RenderTextureDescriptor bufferDepthTextureDescriptor = new RenderTextureDescriptor(m_camera.pixelWidth, m_camera.pixelHeight, RenderTextureFormat.Depth, 16);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraColorTextureId, bufferTextureDescriptor, FilterMode.Point);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraEmissionTextureId, bufferTextureDescriptor, FilterMode.Point);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraOcclusionTextureId, bufferTextureDescriptor, FilterMode.Point);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraAdditionalDataTextureId, bufferTextureDescriptor, FilterMode.Point);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraDirectLightResultTextureId, bufferTextureDescriptor, FilterMode.Bilinear);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraIndirectLightResultTextureId, bufferTextureDescriptor, FilterMode.Bilinear);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraDepthTextureId, bufferDepthTextureDescriptor, FilterMode.Point);
m_textureHandlerBuffer.GetTemporaryRT(L2DLPipelineData.s_cameraFakeDepthTextureId, bufferDepthTextureDescriptor, FilterMode.Point);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_textureHandlerBuffer);
}
// --------------------------------------------------------------------
void RunSpotLightRendering(L2DLSpotLight spotLight)
{
SetupCommonLightRenderingProperties(m_spotLightRenderingBuffer, spotLight);
m_spotLightRenderingBuffer.SetGlobalFloat("_lightAttenuation", 1f / Mathf.Max(spotLight.Range * spotLight.Range, 0.00001f));
m_spotLightRenderingBuffer.SetGlobalVector("_lightPosition", spotLight.transform.position + spotLight.transform.up * spotLight.Range / 2f);
m_spotLightRenderingBuffer.SetGlobalVector("_lightDirection", -spotLight.transform.up);
float outerRad = Mathf.Deg2Rad * 0.5f * spotLight.Angle;
float outerCos = Mathf.Cos(outerRad);
float outerTan = Mathf.Tan(outerRad);
float innerCos = Mathf.Cos(Mathf.Atan((46f / 64f) * outerTan));
float angleRange = Mathf.Max(innerCos - outerCos, 0.00001f);
float spotFade = 1f / angleRange;
m_spotLightRenderingBuffer.SetGlobalVector("_lightFade", new Vector2(spotFade, -outerCos * spotFade));
m_spotLightRenderingBuffer.SetGlobalFloat("_maxIntensityOutput", spotLight.MaxIntensityOutput);
m_spotLightRenderingBuffer.SetGlobalFloat("_startingRange", spotLight.StartingRange);
m_spotLightRenderingBuffer.SetRenderTarget(new RenderTargetIdentifier[] { L2DLPipelineData.s_cameraDirectLightResultTextureId, L2DLPipelineData.s_cameraEmissionTextureId }, L2DLPipelineData.s_cameraFakeDepthTextureId);
m_spotLightRenderingBuffer.Blit(null, BuiltinRenderTextureType.CurrentActive, SpotLightPassMaterial);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_spotLightRenderingBuffer);
}
// --------------------------------------------------------------------
public void CalculateIndirectLight(
ScriptableRenderContext _context,
CommandBuffer _buffer,
Camera _camera,
RenderTargetIdentifier i_emissiveTexture,
RenderTargetIdentifier i_occlusionTexture,
RenderTargetIdentifier o_indirectLightTexture
)
{
if (!L2DLRenderHelpers.SupportsComputeShaders())
{
return;
}
ReloadComputeShaders();
// We'll assume that the emissive texture is all we care about, any reflected direct light can be added in beforehand as part of the general IndirectLight renderer
if (m_emissionPolyphaseMipmapComputeShader == null)
{
m_emissionPolyphaseMipmapComputeShader = (ComputeShader)Resources.Load("Compute Shaders/Indirect Light/Polyphase Mipmap/GenerateEmissionPolyphaseMipmapsCompute");
}
if (m_occlusionPolyphaseMipmapComputeShader == null)
{
m_occlusionPolyphaseMipmapComputeShader = (ComputeShader)Resources.Load("Compute Shaders/Indirect Light/Polyphase Mipmap/GenerateOcclusionPolyphaseMipmapsCompute");
}
GeneratePolyphaseTextureMipmaps(_context, m_emissionPolyphaseMipmapComputeShader, i_emissiveTexture, new Vector2(_camera.pixelWidth, _camera.pixelHeight), 4); //TODO: Firgure out max mips from LPV data
GeneratePolyphaseTextureMipmaps(_context, m_occlusionPolyphaseMipmapComputeShader, i_occlusionTexture, new Vector2(_camera.pixelWidth, _camera.pixelHeight), 4);
// So we can grab some temporary textures that are a power of two above the camera size which generate mips automatically
// We'll then render the emissive and occlusion into them
// We can then use the mipmapped textures
// LPV iterations into the direct light texture ready for final presenting
GenerateIndirectLight(_context, i_emissiveTexture, i_occlusionTexture, o_indirectLightTexture, _camera, m_lpvIterationsData, Color.black);
}
// --------------------------------------------------------------------
private void GeneratePolyphaseTextureMipmaps(
ScriptableRenderContext _context,
ComputeShader _shader,
RenderTargetIdentifier _textureID,
Vector2 _textureSize,
int maxMipLevelGenerated = -1
)
{
//Polyphase box filter for non-power of two texture mip-mapping
int[] previousSize;
int[] currentSize;
//We need to check if width or height has been rounded
bool[] rounded = new bool[2];
//The initial size needs to be recalculated when restarting for each layer so it has to happen within the loop
previousSize = new int[] { (int)_textureSize.x, (int)_textureSize.y };
//Calculate the max possible mip levels this texture can have so we know how may iterations to do
float mipLevels = (int)Mathf.Floor(Mathf.Log(Mathf.Max(_textureSize.x, _textureSize.y), 2));
if (maxMipLevelGenerated != -1)
{
mipLevels = Mathf.Min(mipLevels, maxMipLevelGenerated);
}
//First mip has a special case for occlusion mipmapping
m_polyphaseMipmapBuffer.SetComputeFloatParam(_shader, "isFirstMip", 1f);
for (var lowerMipLevel = 0; lowerMipLevel < mipLevels; lowerMipLevel++)
{
//Get the current size of this mipmap
currentSize = new int[] { previousSize[0] / 2, previousSize[1] / 2 }; //n for width and height
rounded = new bool[] { previousSize[0] / 2f > currentSize[0], previousSize[1] / 2f > currentSize[1] }; //Must be floats for the division
//Pick a kernel given the state of the rounded edges (0, 1, 2, 3)
int kernelIndex;
if (rounded[0] == false)
{
if (rounded[1] == false)
{
//Box - box
kernelIndex = 0;
}
else
{
//Box - poly
kernelIndex = 1;
}
}
else
{
if (rounded[1] == false)
{
//Poly - box
kernelIndex = 2;
}
else
{
//Poly - poly
kernelIndex = 3;
}
}
// Set shader properties
//Bind the lower mip level to read from
m_polyphaseMipmapBuffer.SetComputeTextureParam(_shader, kernelIndex, "LowerMipTex", _textureID, lowerMipLevel);
//Bind the higher mip level to write to
m_polyphaseMipmapBuffer.SetComputeTextureParam(_shader, kernelIndex, "HigherMipTex", _textureID, lowerMipLevel + 1);
//Setup additional working variables
m_polyphaseMipmapBuffer.SetComputeVectorParam(_shader, "LowerMipTexSize", new Vector2(previousSize[0], previousSize[1]));
m_polyphaseMipmapBuffer.SetComputeVectorParam(_shader, "HigherMipTexSize", new Vector2(currentSize[0], currentSize[1]));
m_polyphaseMipmapBuffer.SetComputeVectorParam(_shader, "WasTextureSizeRounded", new Vector2(rounded[0] ? 1f : 0f, rounded[1] ? 1f : 0f));
//Calculate these once so doesn't need to be repeated for each pixel
m_polyphaseMipmapBuffer.SetComputeVectorParam(_shader, "HigherMipTexelUVSize", new Vector2(1f / currentSize[0], 1f / currentSize[1]));
m_polyphaseMipmapBuffer.SetComputeVectorParam(_shader, "LowerMipTexelUVSize", new Vector2(1f / previousSize[0], 1f / previousSize[1]));
m_polyphaseMipmapBuffer.DispatchCompute(
_shader,
kernelIndex,
Mathf.CeilToInt(currentSize[0] / 8f),
Mathf.CeilToInt(currentSize[1] / 8f),
1
);
//Set previous size for next mip
previousSize = currentSize;
if (lowerMipLevel == 0)
{
m_polyphaseMipmapBuffer.SetComputeFloatParam(_shader, "isFirstMip", 0f);
}
}
L2DLRenderHelpers.ExecuteBuffer(_context, m_polyphaseMipmapBuffer);
}
// --------------------------------------------------------------------
private void GenerateIndirectLight
(
ScriptableRenderContext _context,
RenderTargetIdentifier i_emissiveTexture,
RenderTargetIdentifier i_occlusionTexture,
RenderTargetIdentifier o_indirectLightTexture,
Camera _camera,
List <LPVIterationData> _lpvIterationsData,
Color _ambientLightColour
)
{
// Get working textures
RenderTextureDescriptor bufferTextureDescriptor = new RenderTextureDescriptor(_camera.pixelWidth, _camera.pixelHeight, RenderTextureFormat.ARGBHalf, 0)
{
useMipMap = true,
autoGenerateMips = false,
enableRandomWrite = true
};
m_lpvIterationsBuffer.GetTemporaryRT(flipTextureId, bufferTextureDescriptor, FilterMode.Point);
m_lpvIterationsBuffer.GetTemporaryRT(flopTextureId, bufferTextureDescriptor, FilterMode.Point);
// Check shaders
if (m_lpvIterationsComputeShader == null)
{
m_lpvIterationsComputeShader = (ComputeShader)Resources.Load("Compute Shaders/Indirect Light/LPV/LPVIterationCompute");
}
m_lpvIterationsFlipKernel = m_lpvIterationsComputeShader.FindKernel("LPVIterationFlip");
m_lpvIterationsFlopKernel = m_lpvIterationsComputeShader.FindKernel("LPVIterationFlop");
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlipKernel, "OcclusionInput", i_occlusionTexture);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlopKernel, "OcclusionInput", i_occlusionTexture);
m_lpvIterationsBuffer.SetComputeFloatParam(m_lpvIterationsComputeShader, "OcclusionMultiplier", 1f); // TODO
if (m_moveLPVDataDownMipLevelsComputeShader == null)
{
m_moveLPVDataDownMipLevelsComputeShader = (ComputeShader)Resources.Load("Compute Shaders/Indirect Light/LPV/MoveLPVDataDownMipLevels");
}
m_moveLPVDataDownMipLevelsKernel = m_moveLPVDataDownMipLevelsComputeShader.FindKernel("MoveLPVDataDownMipLevels");
// LPV Iterations
float[] textureWidths = new float[_lpvIterationsData.Count];
float[] textureHeights = new float[_lpvIterationsData.Count];
int totalIterationsSoFar = 0;
for (int i = 0; i < _lpvIterationsData.Count; i++)
{
float lightingOutputResolutionDivisor = Mathf.Pow(2, _lpvIterationsData[i].MipLevel);
textureWidths[i] = _camera.pixelWidth / lightingOutputResolutionDivisor;
textureHeights[i] = _camera.pixelHeight / lightingOutputResolutionDivisor;
int threadGroupsX = Mathf.CeilToInt(_camera.pixelWidth / lightingOutputResolutionDivisor / 8f);
int threadGroupsY = Mathf.CeilToInt(_camera.pixelHeight / lightingOutputResolutionDivisor / 8f);
if (i == 0)
{
//Copy
m_lpvIterationsBuffer.CopyTexture(i_emissiveTexture, 0, _lpvIterationsData[i].MipLevel, flipTextureId, 0, _lpvIterationsData[i].MipLevel);
//We just want to inject the ambient light colour into the specified levels
//if (_lpvIterationsData[i].InjectAmbientLight)
//{
// m_lpvIterationsBuffer.SetComputeTextureParam(shaders.ambientLightInjectionComputeShader, shaders.ambientLightInjectionComputeKernel, "Texture", flipTextureId, _lpvIterationsData[i].MipLevel);
// m_lpvIterationsBuffer.SetComputeVectorParam(shaders.ambientLightInjectionComputeShader, "AmbientLight", _ambientLightColour);
// m_lpvIterationsBuffer.DispatchCompute(shaders.ambientLightInjectionComputeShader, shaders.ambientLightInjectionComputeKernel, threadGroupsX, threadGroupsY, 1);
//}
}
else
{
//Instead of copying across I need to shift all of the data down some mip levels using a compute shader for:
// - The lighting flip tex (from whichever one was last used)1
// - The lighting total tex
m_lpvIterationsBuffer.SetComputeVectorParam(m_moveLPVDataDownMipLevelsComputeShader, "OutputCellSize", new Vector2(textureWidths[i] / textureWidths[i - 1], textureHeights[i] / textureHeights[i - 1]));
m_lpvIterationsBuffer.SetComputeTextureParam(m_moveLPVDataDownMipLevelsComputeShader, m_moveLPVDataDownMipLevelsKernel, "CurrentTotalInput", o_indirectLightTexture, _lpvIterationsData[i - 1].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_moveLPVDataDownMipLevelsComputeShader, m_moveLPVDataDownMipLevelsKernel, "EmissiveSourcesInput", i_emissiveTexture, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_moveLPVDataDownMipLevelsComputeShader, m_moveLPVDataDownMipLevelsKernel, "Output1", (totalIterationsSoFar % 2) == 0 ? flipTextureId : flopTextureId, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_moveLPVDataDownMipLevelsComputeShader, m_moveLPVDataDownMipLevelsKernel, "Output2", o_indirectLightTexture, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.DispatchCompute(m_moveLPVDataDownMipLevelsComputeShader, m_moveLPVDataDownMipLevelsKernel, threadGroupsX, threadGroupsY, 1);
//if (_lpvIterationsData[i].InjectAmbientLight)
//{
// m_lpvIterationsBuffer.SetComputeTextureParam(shaders.ambientLightInjectionComputeShader, shaders.ambientLightInjectionComputeKernel, "Texture", (totalIterationsSoFar % 2) == 0 ? flipTextureId : flopTextureId, _lpvIterationsData[i].MipLevel);
// m_lpvIterationsBuffer.SetComputeVectorParam(shaders.ambientLightInjectionComputeShader, "AmbientLight", _ambientLightColour);
// m_lpvIterationsBuffer.DispatchCompute(shaders.ambientLightInjectionComputeShader, shaders.ambientLightInjectionComputeKernel, threadGroupsX, threadGroupsY, 1);
//}
}
//Clear only the FIRST TIME as it's the start of a new total counting
if (_lpvIterationsData[i].MipLevel != 0)
{
m_lpvIterationsBuffer.SetRenderTarget(o_indirectLightTexture, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.ClearRenderTarget(true, true, Color.black);
}
m_lpvIterationsBuffer.SetComputeIntParam(m_lpvIterationsComputeShader, "WorkingMipLevel", _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeIntParam(m_lpvIterationsComputeShader, "StartTotalSavingIteration", _lpvIterationsData[i].TotalStartIteration);
m_lpvIterationsBuffer.SetComputeFloatParam(m_lpvIterationsComputeShader, "TexelWorldWidth", _camera.orthographicSize / (_camera.pixelHeight / lightingOutputResolutionDivisor / 2f));
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlipKernel, "LightTotal", o_indirectLightTexture, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlopKernel, "LightTotal", o_indirectLightTexture, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlipKernel, "LightFlip", flipTextureId, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlipKernel, "LightFlop", flopTextureId, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlopKernel, "LightFlip", flipTextureId, _lpvIterationsData[i].MipLevel);
m_lpvIterationsBuffer.SetComputeTextureParam(m_lpvIterationsComputeShader, m_lpvIterationsFlopKernel, "LightFlop", flopTextureId, _lpvIterationsData[i].MipLevel);
for (var j = 0; j < _lpvIterationsData[i].Iterations; j++)
{
m_lpvIterationsBuffer.SetComputeIntParam(m_lpvIterationsComputeShader, "Iteration", j);
m_lpvIterationsBuffer.DispatchCompute(m_lpvIterationsComputeShader, (totalIterationsSoFar + j) % 2 == 0 ? m_lpvIterationsFlipKernel : m_lpvIterationsFlopKernel, threadGroupsX, threadGroupsY, 1);
}
totalIterationsSoFar += _lpvIterationsData[i].Iterations;
}
//Release textures
m_lpvIterationsBuffer.ReleaseTemporaryRT(flipTextureId);
m_lpvIterationsBuffer.ReleaseTemporaryRT(flopTextureId);
L2DLRenderHelpers.ExecuteBuffer(_context, m_lpvIterationsBuffer);
}
// --------------------------------------------------------------------
public void Render(ScriptableRenderContext context, Camera camera)
{
m_context = context;
m_camera = camera;
// Sample to encapsulate all used buffers under one heading in the frame debugger
L2DLRenderHelpers.BeginSample(m_context, m_sceneDataRenderBuffer);
{
m_context.SetupCameraProperties(m_camera);
// MUST go before culling so that in world UI is setup pre-cull
L2DLRenderHelpers.PrepareCameraForSceneWindow(m_camera);
if (!m_camera.TryGetCullingParameters(out m_cullingParameters))
{
return;
}
m_cullingResults = m_context.Cull(ref m_cullingParameters);
//Clear the main output textures
m_clearTexturebuffer.SetRenderTarget(new RenderTargetIdentifier[]
{
L2DLPipelineData.s_cameraColorTextureId
},
L2DLPipelineData.s_cameraDepthTextureId);
if (m_camera.cameraType == CameraType.SceneView)
{
// The scene m_camera's settings aren't always set to clear things, it's quite odd so hard code it to clear
m_clearTexturebuffer.ClearRenderTarget(true, true, m_camera.backgroundColor.linear);
}
else
{
m_clearTexturebuffer.ClearRenderTarget(m_camera.clearFlags <= CameraClearFlags.Depth, m_camera.clearFlags == CameraClearFlags.Color, m_camera.clearFlags == CameraClearFlags.Color ? m_camera.backgroundColor.linear : Color.clear);
}
//Clear the buffer textures
m_clearTexturebuffer.SetRenderTarget(new RenderTargetIdentifier[]
{
L2DLPipelineData.s_cameraOcclusionTextureId,
L2DLPipelineData.s_cameraEmissionTextureId,
L2DLPipelineData.s_cameraAdditionalDataTextureId
},
L2DLPipelineData.s_cameraDepthTextureId);
m_clearTexturebuffer.ClearRenderTarget(false, true, Color.clear);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_clearTexturebuffer);
// Set render targets for rendering
m_sceneDataRenderBuffer.SetRenderTarget(new RenderTargetIdentifier[]
{
L2DLPipelineData.s_cameraColorTextureId,
L2DLPipelineData.s_cameraOcclusionTextureId,
L2DLPipelineData.s_cameraEmissionTextureId,
L2DLPipelineData.s_cameraAdditionalDataTextureId
},
L2DLPipelineData.s_cameraDepthTextureId);
L2DLRenderHelpers.ExecuteBuffer(m_context, m_sceneDataRenderBuffer);
L2DLRenderHelpers.DrawAllRenderers(m_context, m_cullingResults);
}
L2DLRenderHelpers.EndSample(m_context, m_sceneDataRenderBuffer);
// Editor Only
L2DLRenderHelpers.DrawUnsupportedShaders(m_context, m_cullingResults);
}