GoaLitiuM/FlaxEngine
1
0
Fork 0
Code Issues Pull Requests Actions 7 Packages Projects Releases Wiki Activity

Add Global SDF quality setting and support for variable cascades count and resolution

Browse Source
This commit is contained in:
Wojciech Figat
2022-06-10 14:30:40 +02:00
parent 3b27ae5fa9
commit f685c67275
13 changed files with 128 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
Source/Shaders/GlobalSignDistanceField.hlsl
View File

@@ -13,7 +13,8 @@ struct GlobalSDFData
{
float4 CascadePosDistance[4];
float4 CascadeVoxelSize;
float3 Padding;
float2 Padding;
uint CascadesCount;
float Resolution;
};
@@ -65,7 +66,7 @@ float SampleGlobalSDF(const GlobalSDFData data, Texture3D<float> tex[4], float3
if (distance <= 0.0f)
return GLOBAL_SDF_WORLD_SIZE;
UNROLL
for (uint cascade = 0; cascade < 4; cascade++)
for (uint cascade = 0; cascade < data.CascadesCount; cascade++)
{
float4 cascadePosDistance = data.CascadePosDistance[cascade];
float cascadeMaxDistance = cascadePosDistance.w * 2;
@@ -89,7 +90,7 @@ float3 SampleGlobalSDFGradient(const GlobalSDFData data, Texture3D<float> tex[4]
if (data.CascadePosDistance[3].w <= 0.0f)
return gradient;
UNROLL
for (uint cascade = 0; cascade < 4; cascade++)
for (uint cascade = 0; cascade < data.CascadesCount; cascade++)
{
float4 cascadePosDistance = data.CascadePosDistance[cascade];
float cascadeMaxDistance = cascadePosDistance.w * 2;
@@ -124,7 +125,7 @@ GlobalSDFHit RayTraceGlobalSDF(const GlobalSDFData data, Texture3D<float> tex[4]
float traceMaxDistance = min(trace.MaxDistance, data.CascadePosDistance[3].w * 2);
float3 traceEndPosition = trace.WorldPosition + trace.WorldDirection * traceMaxDistance;
UNROLL
for (uint cascade = 0; cascade < 4 && hit.HitTime < 0.0f; cascade++)
for (uint cascade = 0; cascade < data.CascadesCount && hit.HitTime < 0.0f; cascade++)
{
float4 cascadePosDistance = data.CascadePosDistance[cascade];
float cascadeMaxDistance = cascadePosDistance.w * 2;
@@ -206,8 +207,8 @@ GlobalSDFHit RayTraceGlobalSDF(const GlobalSDFData data, Texture3D<float> tex[4]
}
// Calculates the surface threshold for Global Surface Atlas sampling which matches the Global SDF trace to reduce artifacts
float GetGlobalSurfaceAtlasThreshold(GlobalSDFHit hit)
float GetGlobalSurfaceAtlasThreshold(const GlobalSDFData data, const GlobalSDFHit hit)
{
// Scale the threshold based on the hit cascade (less precision)
return hit.HitCascade * 20.0f + 25.0f;
// Scale the threshold based on the hit cascade (less precision)
return data.CascadeVoxelSize[hit.HitCascade] * 1.1f;
}