public void VolumeVoxelizationPass(DensityVolumeList densityVolumes, HDCamera camera, CommandBuffer cmd, FrameSettings settings)
{
if (preset == VolumetricLightingPreset.Off)
{
return;
}
using (new ProfilingSample(cmd, "Volume Voxelization"))
{
int numVisibleVolumes = m_VisibleVolumeBounds.Count;
if (numVisibleVolumes == 0)
{
// Clear the render target instead of running the shader.
// CoreUtils.SetRenderTarget(cmd, vBuffer.GetDensityBuffer(), ClearFlag.Color, CoreUtils.clearColorAllBlack);
// return;
// Clearing 3D textures does not seem to work!
// Use the workaround by running the full shader with 0 density.
}
VBuffer vBuffer = FindVBuffer(camera.GetViewID());
Debug.Assert(vBuffer != null);
int w = 0, h = 0, d = 0;
vBuffer.GetResolution(ref w, ref h, ref d);
bool enableClustered = settings.lightLoopSettings.enableTileAndCluster;
int kernel = m_VolumeVoxelizationCS.FindKernel(enableClustered ? "VolumeVoxelizationClustered"
: "VolumeVoxelizationBruteforce");
float vFoV = camera.camera.fieldOfView * Mathf.Deg2Rad;
Vector4 resolution = new Vector4(w, h, 1.0f / w, 1.0f / h);
Matrix4x4 transform = HDUtils.ComputePixelCoordToWorldSpaceViewDirectionMatrix(vFoV, resolution, camera.viewMatrix, false);
camera.SetupComputeShader(m_VolumeVoxelizationCS, cmd);
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VBufferDensity, vBuffer.GetDensityBuffer());
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeBounds, s_VisibleVolumeBoundsBuffer);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeProperties, s_VisibleVolumePropertiesBuffer);
// TODO: set the constant buffer data only once.
cmd.SetComputeMatrixParam(m_VolumeVoxelizationCS, HDShaderIDs._VBufferCoordToViewDirWS, transform);
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumVisibleDensityVolumes, numVisibleVolumes);
// The shader defines GROUP_SIZE_1D = 8.
cmd.DispatchCompute(m_VolumeVoxelizationCS, kernel, (w + 7) / 8, (h + 7) / 8, 1);
}
}
public void VolumeVoxelizationPass(HDCamera hdCamera, CommandBuffer cmd, uint frameIndex, DensityVolumeList densityVolumes, LightLoop lightLoop)
{
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.Volumetrics))
{
return;
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType.value != FogType.Volumetric)
{
return;
}
using (new ProfilingSample(cmd, "Volume Voxelization"))
{
int numVisibleVolumes = m_VisibleVolumeBounds.Count;
bool tiledLighting = lightLoop.HasLightToCull() && hdCamera.frameSettings.IsEnabled(FrameSettingsField.BigTilePrepass);
bool highQuality = preset == VolumetricLightingPreset.High;
int kernel = (tiledLighting ? 1 : 0) | (highQuality ? 2 : 0);
var currFrameParams = hdCamera.vBufferParams[0];
var cvp = currFrameParams.viewportSize;
Vector4 resolution = new Vector4(cvp.x, cvp.y, 1.0f / cvp.x, 1.0f / cvp.y);
#if UNITY_2019_1_OR_NEWER
var vFoV = hdCamera.camera.GetGateFittedFieldOfView() * Mathf.Deg2Rad;
var lensShift = hdCamera.camera.GetGateFittedLensShift();
#else
var vFoV = hdCamera.camera.fieldOfView * Mathf.Deg2Rad;
var lensShift = Vector2.zero;
#endif
// Compose the matrix which allows us to compute the world space view direction.
Matrix4x4 transform = HDUtils.ComputePixelCoordToWorldSpaceViewDirectionMatrix(vFoV, lensShift, resolution, hdCamera.mainViewConstants.viewMatrix, false);
// Compute texel spacing at the depth of 1 meter.
float unitDepthTexelSpacing = HDUtils.ComputZPlaneTexelSpacing(1.0f, vFoV, resolution.y);
Texture3D volumeAtlas = DensityVolumeManager.manager.volumeAtlas.GetAtlas();
Vector4 volumeAtlasDimensions = new Vector4(0.0f, 0.0f, 0.0f, 0.0f);
if (volumeAtlas != null)
{
volumeAtlasDimensions.x = (float)volumeAtlas.width / volumeAtlas.depth; // 1 / number of textures
volumeAtlasDimensions.y = volumeAtlas.width;
volumeAtlasDimensions.z = volumeAtlas.depth;
volumeAtlasDimensions.w = Mathf.Log(volumeAtlas.width, 2); // Max LoD
}
else
{
volumeAtlas = CoreUtils.blackVolumeTexture;
}
if (hdCamera.frameSettings.VolumeVoxelizationRunsAsync())
{
// We explicitly set the big tile info even though it is set globally, since this could be running async before the PushGlobalParams
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumTileBigTileX, lightLoop.GetNumTileBigTileX(hdCamera));
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumTileBigTileY, lightLoop.GetNumTileBigTileY(hdCamera));
if (tiledLighting)
{
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs.g_vBigTileLightList, lightLoop.GetBigTileLightList());
}
}
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VBufferDensity, m_DensityBufferHandle);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeBounds, s_VisibleVolumeBoundsBuffer);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeData, s_VisibleVolumeDataBuffer);
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeMaskAtlas, volumeAtlas);
// TODO: set the constant buffer data only once.
cmd.SetComputeMatrixParam(m_VolumeVoxelizationCS, HDShaderIDs._VBufferCoordToViewDirWS, transform);
cmd.SetComputeFloatParam(m_VolumeVoxelizationCS, HDShaderIDs._VBufferUnitDepthTexelSpacing, unitDepthTexelSpacing);
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumVisibleDensityVolumes, numVisibleVolumes);
cmd.SetComputeVectorParam(m_VolumeVoxelizationCS, HDShaderIDs._VolumeMaskDimensions, volumeAtlasDimensions);
int w = (int)resolution.x;
int h = (int)resolution.y;
// The shader defines GROUP_SIZE_1D = 8.
cmd.DispatchCompute(m_VolumeVoxelizationCS, kernel, (w + 7) / 8, (h + 7) / 8, hdCamera.computePassCount);
}
}
public DensityVolumeList PrepareVisibleDensityVolumeList(HDCamera hdCamera, CommandBuffer cmd, float time)
{
DensityVolumeList densityVolumes = new DensityVolumeList();
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.Volumetrics))
{
return(densityVolumes);
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType.value != FogType.Volumetric)
{
return(densityVolumes);
}
using (new ProfilingSample(cmd, "Prepare Visible Density Volume List"))
{
Vector3 camPosition = hdCamera.camera.transform.position;
Vector3 camOffset = Vector3.zero;// World-origin-relative
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
camOffset = camPosition; // Camera-relative
}
m_VisibleVolumeBounds.Clear();
m_VisibleVolumeData.Clear();
// Collect all visible finite volume data, and upload it to the GPU.
DensityVolume[] volumes = DensityVolumeManager.manager.PrepareDensityVolumeData(cmd, hdCamera.camera, time);
for (int i = 0; i < Math.Min(volumes.Length, k_MaxVisibleVolumeCount); i++)
{
DensityVolume volume = volumes[i];
// TODO: cache these?
var obb = new OrientedBBox(Matrix4x4.TRS(volume.transform.position, volume.transform.rotation, volume.parameters.size));
// Handle camera-relative rendering.
obb.center -= camOffset;
// Frustum cull on the CPU for now. TODO: do it on the GPU.
// TODO: account for custom near and far planes of the V-Buffer's frustum.
// It's typically much shorter (along the Z axis) than the camera's frustum.
// XRTODO: fix combined frustum culling
if (GeometryUtils.Overlap(obb, hdCamera.frustum, 6, 8) || hdCamera.camera.stereoEnabled)
{
// TODO: cache these?
var data = volume.parameters.ConvertToEngineData();
m_VisibleVolumeBounds.Add(obb);
m_VisibleVolumeData.Add(data);
}
}
s_VisibleVolumeBoundsBuffer.SetData(m_VisibleVolumeBounds);
s_VisibleVolumeDataBuffer.SetData(m_VisibleVolumeData);
// Fill the struct with pointers in order to share the data with the light loop.
densityVolumes.bounds = m_VisibleVolumeBounds;
densityVolumes.density = m_VisibleVolumeData;
return(densityVolumes);
}
}
public void VolumeVoxelizationPass(HDCamera hdCamera, CommandBuffer cmd, uint frameIndex, DensityVolumeList densityVolumes)
{
if (!hdCamera.frameSettings.enableVolumetrics)
{
return;
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType.value != FogType.Volumetric)
{
return;
}
using (new ProfilingSample(cmd, "Volume Voxelization"))
{
int numVisibleVolumes = m_VisibleVolumeBounds.Count;
bool highQuality = preset == VolumetricLightingPreset.High;
bool enableClustered = hdCamera.frameSettings.lightLoopSettings.enableTileAndCluster;
int kernel;
if (highQuality)
{
kernel = m_VolumeVoxelizationCS.FindKernel(enableClustered ? "VolumeVoxelizationClusteredHQ"
: "VolumeVoxelizationBruteforceHQ");
}
else
{
kernel = m_VolumeVoxelizationCS.FindKernel(enableClustered ? "VolumeVoxelizationClusteredMQ"
: "VolumeVoxelizationBruteforceMQ");
}
var currFrameParams = hdCamera.vBufferParams[0];
var cvp = currFrameParams.viewportSize;
Vector4 resolution = new Vector4(cvp.x, cvp.y, 1.0f / cvp.x, 1.0f / cvp.y);
float vFoV = hdCamera.camera.fieldOfView * Mathf.Deg2Rad;
// Compose the matrix which allows us to compute the world space view direction.
Matrix4x4 transform = HDUtils.ComputePixelCoordToWorldSpaceViewDirectionMatrix(vFoV, resolution, hdCamera.viewMatrix, false);
Texture3D volumeAtlas = DensityVolumeManager.manager.volumeAtlas.GetAtlas();
Vector4 volumeAtlasDimensions = new Vector4(0.0f, 0.0f, 0.0f, 0.0f);
if (volumeAtlas != null)
{
volumeAtlasDimensions.x = (float)volumeAtlas.width / volumeAtlas.depth; // 1 / number of textures
volumeAtlasDimensions.y = volumeAtlas.width;
volumeAtlasDimensions.z = volumeAtlas.depth;
volumeAtlasDimensions.w = Mathf.Log(volumeAtlas.width, 2); // Max LoD
}
else
{
volumeAtlas = CoreUtils.blackVolumeTexture;
}
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VBufferDensity, m_DensityBufferHandle);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeBounds, s_VisibleVolumeBoundsBuffer);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeData, s_VisibleVolumeDataBuffer);
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeMaskAtlas, volumeAtlas);
// TODO: set the constant buffer data only once.
cmd.SetComputeMatrixParam(m_VolumeVoxelizationCS, HDShaderIDs._VBufferCoordToViewDirWS, transform);
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumVisibleDensityVolumes, numVisibleVolumes);
cmd.SetComputeVectorParam(m_VolumeVoxelizationCS, HDShaderIDs._VolumeMaskDimensions, volumeAtlasDimensions);
int w = (int)resolution.x;
int h = (int)resolution.y;
// The shader defines GROUP_SIZE_1D = 8.
cmd.DispatchCompute(m_VolumeVoxelizationCS, kernel, (w + 7) / 8, (h + 7) / 8, 1);
}
}
public void VolumeVoxelizationPass(DensityVolumeList densityVolumes, HDCamera camera, CommandBuffer cmd, FrameSettings settings, uint frameIndex)
{
if (preset == VolumetricLightingPreset.Off)
{
return;
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType != FogType.Volumetric)
{
return;
}
VBuffer vBuffer = FindVBuffer(camera.GetViewID());
if (vBuffer == null)
{
return;
}
using (new ProfilingSample(cmd, "Volume Voxelization"))
{
int numVisibleVolumes = m_VisibleVolumeBounds.Count;
if (numVisibleVolumes == 0)
{
// Clear the render target instead of running the shader.
// Note: the clear must take the global fog into account!
// CoreUtils.SetRenderTarget(cmd, vBuffer.GetDensityBuffer(), ClearFlag.Color, CoreUtils.clearColorAllBlack);
// return;
// Clearing 3D textures does not seem to work!
// Use the workaround by running the full shader with 0 density
}
bool enableClustered = settings.lightLoopSettings.enableTileAndCluster;
int kernel = m_VolumeVoxelizationCS.FindKernel(enableClustered ? "VolumeVoxelizationClustered"
: "VolumeVoxelizationBruteforce");
var frameParams = vBuffer.GetParameters(frameIndex);
Vector4 resolution = frameParams.resolution;
float vFoV = camera.camera.fieldOfView * Mathf.Deg2Rad;
// Compose the matrix which allows us to compute the world space view direction.
Matrix4x4 transform = HDUtils.ComputePixelCoordToWorldSpaceViewDirectionMatrix(vFoV, resolution, camera.viewMatrix, false);
Texture3D volumeAtlas = DensityVolumeManager.manager.volumeAtlas.volumeAtlas;
Vector2 volumeAtlasDimensions = new Vector2(0.0f, 0.0f);
if (volumeAtlas != null)
{
volumeAtlasDimensions.x = volumeAtlas.width / volumeAtlas.depth; // 1 / number of textures
volumeAtlasDimensions.y = 1.0f / volumeAtlas.width;
}
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VBufferDensity, vBuffer.GetDensityBuffer());
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeBounds, s_VisibleVolumeBoundsBuffer);
cmd.SetComputeBufferParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeData, s_VisibleVolumeDataBuffer);
cmd.SetComputeTextureParam(m_VolumeVoxelizationCS, kernel, HDShaderIDs._VolumeMaskAtlas, volumeAtlas);
// TODO: set the constant buffer data only once.
cmd.SetComputeMatrixParam(m_VolumeVoxelizationCS, HDShaderIDs._VBufferCoordToViewDirWS, transform);
cmd.SetComputeIntParam(m_VolumeVoxelizationCS, HDShaderIDs._NumVisibleDensityVolumes, numVisibleVolumes);
cmd.SetComputeVectorParam(m_VolumeVoxelizationCS, HDShaderIDs._VolumeMaskDimensions, volumeAtlasDimensions);
int w = (int)resolution.x;
int h = (int)resolution.y;
// The shader defines GROUP_SIZE_1D = 8.
cmd.DispatchCompute(m_VolumeVoxelizationCS, kernel, (w + 7) / 8, (h + 7) / 8, 1);
}
}
public DensityVolumeList PrepareVisibleDensityVolumeList(HDCamera camera, CommandBuffer cmd)
{
DensityVolumeList densityVolumes = new DensityVolumeList();
if (preset == VolumetricLightingPreset.Off)
{
return(densityVolumes);
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType != FogType.Volumetric)
{
return(densityVolumes);
}
VBuffer vBuffer = FindVBuffer(camera.GetViewID());
if (vBuffer == null)
{
return(densityVolumes);
}
using (new ProfilingSample(cmd, "Prepare Visible Density Volume List"))
{
Vector3 camPosition = camera.camera.transform.position;
Vector3 camOffset = Vector3.zero; // World-origin-relative
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
camOffset = camPosition; // Camera-relative
}
m_VisibleVolumeBounds.Clear();
m_VisibleVolumeData.Clear();
// Collect all visible finite volume data, and upload it to the GPU.
DensityVolume[] volumes = DensityVolumeManager.manager.PrepareDensityVolumeData(cmd);
for (int i = 0; i < Math.Min(volumes.Length, k_MaxVisibleVolumeCount); i++)
{
DensityVolume volume = volumes[i];
// TODO: cache these?
var obb = OrientedBBox.Create(volume.transform);
// Handle camera-relative rendering.
obb.center -= camOffset;
// Frustum cull on the CPU for now. TODO: do it on the GPU.
if (GeometryUtils.Overlap(obb, camera.frustum, 6, 8))
{
// TODO: cache these?
var data = volume.parameters.GetData();
m_VisibleVolumeBounds.Add(obb);
m_VisibleVolumeData.Add(data);
}
}
s_VisibleVolumeBoundsBuffer.SetData(m_VisibleVolumeBounds);
s_VisibleVolumeDataBuffer.SetData(m_VisibleVolumeData);
// Fill the struct with pointers in order to share the data with the light loop.
densityVolumes.bounds = m_VisibleVolumeBounds;
densityVolumes.density = m_VisibleVolumeData;
return(densityVolumes);
}
}
