73 lines
3.1 KiB
Plaintext
73 lines
3.1 KiB
Plaintext
#pragma kernel DebugLightCluster
|
|
|
|
#pragma only_renderers d3d11
|
|
|
|
#define DEBUG_LIGHT_CLUSTER_TILE_SIZE 8
|
|
|
|
#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl"
|
|
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/ShaderLibrary/ShaderVariables.hlsl"
|
|
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/Material/NormalBuffer.hlsl"
|
|
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/ShaderVariablesRaytracingLightLoop.hlsl"
|
|
#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/Raytracing/Shaders/RayTracingLightCluster.hlsl"
|
|
|
|
// Color gradient texture used for the lightcount heatmap
|
|
TEXTURE2D(_DebugColorGradientTexture);
|
|
|
|
// The output texture for the cluster debug
|
|
RW_TEXTURE2D_X(float4, _DebutLightClusterTexture);
|
|
|
|
[numthreads(DEBUG_LIGHT_CLUSTER_TILE_SIZE, DEBUG_LIGHT_CLUSTER_TILE_SIZE, 1)]
|
|
void DebugLightCluster(uint2 groupThreadId : SV_GroupThreadID, uint2 groupId : SV_GroupID)
|
|
{
|
|
// Fetch the current pixel coordinate
|
|
uint2 currentPixelCoordinate = groupId * DEBUG_LIGHT_CLUSTER_TILE_SIZE + groupThreadId;
|
|
|
|
// Convert this to a world space position
|
|
float depth = LoadCameraDepth(currentPixelCoordinate.xy);
|
|
|
|
// If this is a background set it to black
|
|
if (depth == UNITY_RAW_FAR_CLIP_VALUE)
|
|
{
|
|
_DebutLightClusterTexture[COORD_TEXTURE2D_X(currentPixelCoordinate)] = float4(0.0, 0.0, 0.0, 1.0f);
|
|
return;
|
|
}
|
|
|
|
// Compute the real world space position of this pixel
|
|
PositionInputs posInput = GetPositionInput(currentPixelCoordinate, 1.0 / _ScreenSize.xy, depth, UNITY_MATRIX_I_VP, GetWorldToViewMatrix(), 0);
|
|
|
|
// If this position is outisde of the cluster, color is gray
|
|
if(!PointInsideCluster(posInput.positionWS))
|
|
{
|
|
_DebutLightClusterTexture[COORD_TEXTURE2D_X(currentPixelCoordinate)] = float4(0.1, 0.1, 0.1, 1.0f);
|
|
return;
|
|
}
|
|
|
|
// Compute the grid position
|
|
float3 floatingGridPosition = (posInput.positionWS - _MinClusterPos) / (_MaxClusterPos - _MinClusterPos) * float3(64.0, 64.0, 32.0);
|
|
|
|
// Convert it to an int3
|
|
uint3 gridPosition = (uint3)floatingGridPosition;
|
|
|
|
// Deduce the cell index
|
|
uint cellIndex = GetClusterCellIndex(posInput.positionWS);
|
|
|
|
// Fetch the light count
|
|
uint numLights = GetTotalLightClusterCellCount(cellIndex);
|
|
|
|
// If this pixel has no lights, let the color to gray
|
|
if(numLights == 0)
|
|
{
|
|
_DebutLightClusterTexture[COORD_TEXTURE2D_X(currentPixelCoordinate)] = float4(0.1, 0.1, 0.1, 1.0f);
|
|
return;
|
|
}
|
|
|
|
// Compute the color of this pixel
|
|
float linearDepth = Linear01Depth(depth, _ZBufferParams);
|
|
float lightFillPercentage = (float)numLights / (float)_LightPerCellCount;
|
|
float3 cellColor = lerp(float3(0.0, 1.0, 0.0), float3(1.0, 1.0, 0.0), clamp(lightFillPercentage, 0.0, 1.0)) * linearDepth;
|
|
cellColor.xyz = numLights >= _LightPerCellCount ? float3(0.7, 0.0, 0.0) : cellColor.xyz;
|
|
|
|
// Return the color
|
|
_DebutLightClusterTexture[COORD_TEXTURE2D_X(currentPixelCoordinate)] = float4(cellColor, 1.0);
|
|
}
|