protected override void AddLightInternal(LightComponent light)
{
var pointLight = (LightPoint)light.Type;
lights[Count] = new PointLightData
{
PositionWS = light.Position,
InvSquareRadius = pointLight.InvSquareRadius,
Color = light.Color,
};
}
public override unsafe void ApplyViewParameters(RenderDrawContext context, int viewIndex, ParameterCollection parameters)
{
// Note: no need to fill CurrentLights since we have no shadow maps
base.ApplyViewParameters(context, viewIndex, parameters);
var renderView = renderViews[viewIndex];
var viewSize = renderView.ViewSize;
// No screen size set?
if (viewSize.X == 0 || viewSize.Y == 0)
{
return;
}
var clusterCountX = ((int)viewSize.X + ClusterSize - 1) / ClusterSize;
var clusterCountY = ((int)viewSize.Y + ClusterSize - 1) / ClusterSize;
// TODO: Additional culling on x/y (to remove corner clusters)
// Prepare planes for culling
//var viewProjection = renderView.ViewProjection;
//Array.Resize(ref zPlanes, ClusterSlices + 1);
//for (int z = 0; z <= ClusterSlices; ++z)
//{
// var zFactor = (float)z / (float)ClusterSlices;
//
// // Build planes between nearplane and -farplane (see BoundingFrustum code)
// zPlanes[z] = new Plane(
// viewProjection.M13 - zFactor * viewProjection.M14,
// viewProjection.M23 - zFactor * viewProjection.M24,
// viewProjection.M33 - zFactor * viewProjection.M34,
// viewProjection.M43 - zFactor * viewProjection.M44);
//
// zPlanes[z].Normalize();
//}
if (pointGroupRenderer.lightClusters == null || lightClustersValues.Length != clusterCountX * clusterCountY * ClusterSlices)
{
// First time?
pointGroupRenderer.lightClusters?.Dispose();
pointGroupRenderer.lightClusters = Texture.New3D(context.GraphicsDevice, clusterCountX, clusterCountY, 8, PixelFormat.R32G32_UInt);
lightClustersValues = new Int2[clusterCountX * clusterCountY * ClusterSlices];
}
// Initialize cluster with no light (-1)
for (int i = 0; i < clusterCountX * clusterCountY * ClusterSlices; ++i)
{
lightNodes.Add(new LightClusterLinkedNode(LightType.Point, -1, -1));
}
// List of clusters moved by this light
var movedClusters = new Dictionary <LightClusterLinkedNode, int>();
// Try to use SpecialNearPlane to not waste too much slices in very small depth
// Make sure we don't go to more than 10% of max depth
var nearPlane = Math.Max(Math.Min(SpecialNearPlane, renderView.FarClipPlane * 0.1f), renderView.NearClipPlane);
//var sliceBias = ((renderView.NearClipPlane * renderView.Projection.M33) + renderView.Projection.M43) / (renderView.NearClipPlane * renderView.Projection.M34);
// Compute scale and bias so that near_plane..special_near fits in slice 0, then grow exponentionally
// log2(specialNear * scale + bias) == 1.0
// log2(far * scale + bias) == ClusterSlices
// as a result:
clusterDepthScale = (float)(Math.Pow(2.0f, ClusterSlices) - 2.0f) / (renderView.FarClipPlane - nearPlane);
clusterDepthBias = 2.0f - clusterDepthScale * nearPlane;
//---------------- SPOT LIGHTS -------------------
var lightRange = pointGroupRenderer.spotGroup.LightRanges[viewIndex];
for (int i = lightRange.Start; i < lightRange.End; ++i)
{
var light = pointGroupRenderer.spotGroup.Lights[i].Light;
var spotLight = (LightSpot)light.Type;
if (spotLight.Shadow != null && spotLight.Shadow.Enabled)
{
continue;
}
// Create spot light data
var spotLightData = new SpotLightData
{
PositionWS = light.Position,
DirectionWS = light.Direction,
AngleOffsetAndInvSquareRadius = new Vector3(spotLight.LightAngleScale, spotLight.LightAngleOffset, spotLight.InvSquareRange),
Color = light.Color,
};
// Fill list of spot lights
spotLights.Add(spotLightData);
movedClusters.Clear();
var radius = (float)Math.Sqrt(1.0f / spotLightData.AngleOffsetAndInvSquareRadius.Z);
Vector3 positionVS;
Vector3.TransformCoordinate(ref spotLightData.PositionWS, ref renderView.View, out positionVS);
// TODO: culling (first do it on PointLight, then backport it to SpotLight and improve for SpotLight case)
// Find x/y ranges
Vector2 clipMin, clipMax;
ComputeClipRegion(positionVS, radius, ref renderView.Projection, out clipMin, out clipMax);
var tileStartX = MathUtil.Clamp((int)((clipMin.X * 0.5f + 0.5f) * viewSize.X / ClusterSize), 0, clusterCountX);
var tileEndX = MathUtil.Clamp((int)((clipMax.X * 0.5f + 0.5f) * viewSize.X / ClusterSize) + 1, 0, clusterCountX);
var tileStartY = MathUtil.Clamp((int)((-clipMax.Y * 0.5f + 0.5f) * viewSize.Y / ClusterSize), 0, clusterCountY);
var tileEndY = MathUtil.Clamp((int)((-clipMin.Y * 0.5f + 0.5f) * viewSize.Y / ClusterSize) + 1, 0, clusterCountY);
// Find z range (project using Projection matrix)
var startZ = -positionVS.Z - radius;
var endZ = -positionVS.Z + radius;
var tileStartZ = MathUtil.Clamp((int)Math.Log(startZ * clusterDepthScale + clusterDepthBias, 2.0f), 0, ClusterSlices);
var tileEndZ = MathUtil.Clamp((int)Math.Log(endZ * clusterDepthScale + clusterDepthBias, 2.0f) + 1, 0, ClusterSlices);
for (int z = tileStartZ; z < tileEndZ; ++z)
{
for (int y = tileStartY; y < tileEndY; ++y)
{
for (int x = tileStartX; x < tileEndX; ++x)
{
AddLightToCluster(movedClusters, LightType.Spot, i - lightRange.Start, x + (y + z * clusterCountY) * clusterCountX);
}
}
}
}
//---------------- POINT LIGHTS -------------------
lightRange = LightRanges[viewIndex];
for (int i = lightRange.Start; i < lightRange.End; ++i)
{
var light = Lights[i].Light;
var pointLight = (LightPoint)light.Type;
// Create point light data
var pointLightData = new PointLightData
{
PositionWS = light.Position,
InvSquareRadius = pointLight.InvSquareRadius,
Color = light.Color,
};
// Fill list of point lights
pointLights.Add(pointLightData);
movedClusters.Clear();
var radius = (float)Math.Sqrt(1.0f / pointLightData.InvSquareRadius);
Vector3 positionVS;
Vector3.TransformCoordinate(ref pointLightData.PositionWS, ref renderView.View, out positionVS);
//Vector3 positionScreen;
//Vector3.TransformCoordinate(ref pointLightData.PositionWS, ref renderView.ViewProjection, out positionScreen);
// Find x/y ranges
Vector2 clipMin, clipMax;
ComputeClipRegion(positionVS, radius, ref renderView.Projection, out clipMin, out clipMax);
var tileStartX = MathUtil.Clamp((int)((clipMin.X * 0.5f + 0.5f) * viewSize.X / ClusterSize), 0, clusterCountX);
var tileEndX = MathUtil.Clamp((int)((clipMax.X * 0.5f + 0.5f) * viewSize.X / ClusterSize) + 1, 0, clusterCountX);
var tileStartY = MathUtil.Clamp((int)((-clipMax.Y * 0.5f + 0.5f) * viewSize.Y / ClusterSize), 0, clusterCountY);
var tileEndY = MathUtil.Clamp((int)((-clipMin.Y * 0.5f + 0.5f) * viewSize.Y / ClusterSize) + 1, 0, clusterCountY);
// Find z range (project using Projection matrix)
var startZ = -positionVS.Z - radius;
var endZ = -positionVS.Z + radius;
//var centerZ = (int)(positionVS.Z * ClusterDepthScale + ClusterDepthBias);
var tileStartZ = MathUtil.Clamp((int)Math.Log(startZ * clusterDepthScale + clusterDepthBias, 2.0f), 0, ClusterSlices);
var tileEndZ = MathUtil.Clamp((int)Math.Log(endZ * clusterDepthScale + clusterDepthBias, 2.0f) + 1, 0, ClusterSlices);
for (int z = tileStartZ; z < tileEndZ; ++z)
{
// TODO: Additional culling on x/y (to remove corner clusters)
// See "Practical Clustered Shading" for details
//if (z != centerZ)
//{
// var plane = z < centerZ ? zPlanes[z + 1] : -zPlanes[z];
//
// positionScreen = Plane.DotCoordinate(ref plane, ref positionScreen, out )
//}
for (int y = tileStartY; y < tileEndY; ++y)
{
for (int x = tileStartX; x < tileEndX; ++x)
{
AddLightToCluster(movedClusters, LightType.Point, i - lightRange.Start, x + (y + z * clusterCountY) * clusterCountX);
}
}
}
}
// Finish clusters by making their last element unique and building clusterInfos
movedClusters.Clear();
for (int i = 0; i < clusterCountX * clusterCountY * ClusterSlices; ++i)
{
FinishCluster(movedClusters, i);
}
// Prepare light clusters
for (int i = 0; i < clusterCountX * clusterCountY * ClusterSlices; ++i)
{
var clusterId = lightNodes[i].NextNode;
lightClustersValues[i] = clusterId != -1 ? clusterInfos[clusterId] : new Int2(0, 0);
}
// Upload data to texture
using (new DefaultCommandListLock(context.CommandList))
{
fixed(Int2 *dataPtr = lightClustersValues)
context.CommandList.UpdateSubresource(pointGroupRenderer.lightClusters, 0, new DataBox((IntPtr)dataPtr, sizeof(Int2) * clusterCountX, sizeof(Int2) * clusterCountX * clusterCountY));
// PointLights: Ensure size and update
if (pointLights.Count > 0)
{
if (pointGroupRenderer.pointLightsBuffer == null || pointGroupRenderer.pointLightsBuffer.SizeInBytes < pointLights.Count * sizeof(PointLightData))
{
pointGroupRenderer.pointLightsBuffer?.Dispose();
pointGroupRenderer.pointLightsBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(pointLights.Count * sizeof(PointLightData)), 0, BufferFlags.ShaderResource, PixelFormat.R32G32B32A32_Float);
}
fixed(PointLightData *pointLightsPtr = pointLights.Items)
context.CommandList.UpdateSubresource(pointGroupRenderer.pointLightsBuffer, 0, new DataBox((IntPtr)pointLightsPtr, 0, 0), new ResourceRegion(0, 0, 0, pointLights.Count * sizeof(PointLightData), 1, 1));
}
#if SILICONSTUDIO_PLATFORM_MACOS
// macOS doesn't like when we provide a null Buffer or if it is not sufficiently allocated.
// It would cause an inifite loop. So for now we just create one with one element but not initializing it.
else if (pointGroupRenderer.pointLightsBuffer == null || pointGroupRenderer.pointLightsBuffer.SizeInBytes < sizeof(PointLightData))
{
pointGroupRenderer.pointLightsBuffer?.Dispose();
pointGroupRenderer.pointLightsBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(sizeof(PointLightData)), 0, BufferFlags.ShaderResource, PixelFormat.R32G32B32A32_Float);
}
#endif
// SpotLights: Ensure size and update
if (spotLights.Count > 0)
{
if (pointGroupRenderer.spotLightsBuffer == null || pointGroupRenderer.spotLightsBuffer.SizeInBytes < spotLights.Count * sizeof(SpotLightData))
{
pointGroupRenderer.spotLightsBuffer?.Dispose();
pointGroupRenderer.spotLightsBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(spotLights.Count * sizeof(SpotLightData)), 0, BufferFlags.ShaderResource,
PixelFormat.R32G32B32A32_Float);
}
fixed(SpotLightData *spotLightsPtr = spotLights.Items)
context.CommandList.UpdateSubresource(pointGroupRenderer.spotLightsBuffer, 0, new DataBox((IntPtr)spotLightsPtr, 0, 0),
new ResourceRegion(0, 0, 0, spotLights.Count * sizeof(SpotLightData), 1, 1));
}
#if SILICONSTUDIO_PLATFORM_MACOS
// See previous macOS comment.
else if (pointGroupRenderer.spotLightsBuffer == null || pointGroupRenderer.spotLightsBuffer.SizeInBytes < sizeof(SpotLightData))
{
pointGroupRenderer.spotLightsBuffer?.Dispose();
pointGroupRenderer.spotLightsBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(sizeof(SpotLightData)), 0, BufferFlags.ShaderResource, PixelFormat.R32G32B32A32_Float);
}
#endif
// LightIndices: Ensure size and update
if (lightIndices.Count > 0)
{
if (pointGroupRenderer.lightIndicesBuffer == null || pointGroupRenderer.lightIndicesBuffer.SizeInBytes < lightIndices.Count * sizeof(int))
{
pointGroupRenderer.lightIndicesBuffer?.Dispose();
pointGroupRenderer.lightIndicesBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(lightIndices.Count * sizeof(int)), 0, BufferFlags.ShaderResource,
PixelFormat.R32_UInt);
}
fixed(int *lightIndicesPtr = lightIndices.Items)
context.CommandList.UpdateSubresource(pointGroupRenderer.lightIndicesBuffer, 0, new DataBox((IntPtr)lightIndicesPtr, 0, 0),
new ResourceRegion(0, 0, 0, lightIndices.Count * sizeof(int), 1, 1));
}
#if SILICONSTUDIO_PLATFORM_MACOS
// See previous macOS comment.
else if (pointGroupRenderer.lightIndicesBuffer == null || pointGroupRenderer.lightIndicesBuffer.SizeInBytes < sizeof(int))
{
pointGroupRenderer.lightIndicesBuffer?.Dispose();
pointGroupRenderer.lightIndicesBuffer = Buffer.New(context.GraphicsDevice, MathUtil.NextPowerOfTwo(sizeof(int)), 0, BufferFlags.ShaderResource, PixelFormat.R32_UInt);
}
#endif
}
// Clear data
pointLights.Clear();
spotLights.Clear();
lightIndices.Clear();
lightNodes.Clear();
clusterInfos.Clear();
// Set resources
parameters.Set(LightClusteredPointGroupKeys.PointLights, pointGroupRenderer.pointLightsBuffer);
parameters.Set(LightClusteredSpotGroupKeys.SpotLights, pointGroupRenderer.spotLightsBuffer);
parameters.Set(LightClusteredKeys.LightIndices, pointGroupRenderer.lightIndicesBuffer);
parameters.Set(LightClusteredKeys.LightClusters, pointGroupRenderer.lightClusters);
parameters.Set(LightClusteredKeys.ClusterDepthScale, clusterDepthScale);
parameters.Set(LightClusteredKeys.ClusterDepthBias, clusterDepthBias);
}
