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Generate eye index, and start using to index proj matrices 

The eye index is generated from the GroupID.z value, which will be doubled in stereo case.
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Robert Srinivasiah 7 年前
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共有 1 个文件被更改，包括 49 次插入 和 47 次删除
  1. 96
      ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightLoop/lightlistbuild-clustered.compute

96
ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/LightLoop/lightlistbuild-clustered.compute
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#endif
// XRTODO: Stereo-ize access to g_mInvScrProjection, pass in eyeIndex
float GetLinearDepth(float zDptBufSpace) // 0 is near 1 is far
float GetLinearDepth(float zDptBufSpace, uint eyeIndex) // 0 is near 1 is far
float4x4 g_mInvScrProjection = g_mInvScrProjectionArr[0];
float4x4 g_mInvScrProjection = g_mInvScrProjectionArr[eyeIndex];
// for perspective projection m22 is zero and m23 is +1/-1 (depends on left/right hand proj)
// however this function must also work for orthographic projection so we keep it like this.

//return v4Pres.z / v4Pres.w;
}
// XRTODO: Stereo-ize access to g_mScrProjection, pass in eyeIndex
float3 GetViewPosFromLinDepth(float2 v2ScrPos, float fLinDepth)
// XRTODO - DONE: Stereo-ize access to g_mScrProjection, pass in eyeIndex
float3 GetViewPosFromLinDepth(float2 v2ScrPos, float fLinDepth, uint eyeIndex)
float4x4 g_mScrProjection = g_mScrProjectionArr[0];
float4x4 g_mScrProjection = g_mScrProjectionArr[eyeIndex];
bool isOrthographic = g_isOrthographic!=0;
float fSx = g_mScrProjection[0].x;

return float3(isOrthographic ? p.xy : (fLinDepth*p.xy), fLinDepth);
}
// XRTODO: Stereo-ize access to g_mScrProjection, pass in eyeIndex
float GetOnePixDiagWorldDistAtDepthOne()
// XRTODO - DONE: Stereo-ize access to g_mScrProjection, pass in eyeIndex
float GetOnePixDiagWorldDistAtDepthOne(uint eyeIndex)
float4x4 g_mScrProjection = g_mScrProjectionArr[0];
float4x4 g_mScrProjection = g_mScrProjectionArr[eyeIndex];
float fSx = g_mScrProjection[0].x;
float fSy = g_mScrProjection[1].y;

// in lightlistbuild-bigtile.compute. But would need more re-factoring than needed
// right now.
// XRTODO: Stereo-ize these functions with eyeIndex
// XRTODO - DONE: Stereo-ize these functions with eyeIndex
int CullByExactEdgeTests(uint threadID, int iNrCoarseLights, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane);
int CullByExactEdgeTests(uint threadID, int iNrCoarseLights, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane, uint eyeIndex);
int SphericalIntersectionTests(uint threadID, int iNrCoarseLights, float2 screenCoordinate);
int SphericalIntersectionTests(uint threadID, int iNrCoarseLights, float2 screenCoordinate, uint eyeIndex);
#endif

float4 FetchPlane(int l, int p);
// XRTODO: Stereo-ize due to access to GetViewPosFromLinDepth
// XRTODO - DONE: Stereo-ize due to access to GetViewPosFromLinDepth
bool CheckIntersection(int l, int k, uint2 viTilLL, uint2 viTilUR, float suggestedBase)
bool CheckIntersection(int l, int k, uint2 viTilLL, uint2 viTilUR, float suggestedBase, uint eyeIndex)
{
// If this light's screen space depth bounds intersect this cluster...simple cluster test
// TODO: Unify this code with the code in CheckIntersectionBasic...

float x = (i&1)==0 ? viTilLL.x : viTilUR.x;
float y = (i&2)==0 ? viTilLL.y : viTilUR.y;
float z = (i&4)==0 ? depthAtNearZ : depthAtFarZ;
// XRTODO: Stereo-ize this by passing in eyeIndex
float3 vP = GetViewPosFromLinDepth( float2(x, y), z);
// XRTODO - DONE: Stereo-ize this by passing in eyeIndex
float3 vP = GetViewPosFromLinDepth( float2(x, y), z, eyeIndex);
// Test each corner of the cluster against the light bounding box planes
bAllInvisib = bAllInvisib && dot(plane, float4(vP,1.0))>0;

[numthreads(NR_THREADS, 1, 1)]
void LIGHTLISTGEN(uint threadID : SV_GroupIndex, uint3 u3GroupID : SV_GroupID)
{
// XRTODO: Generate eyeIndex from u3GroupID.z
// XRTODO - DONE: Generate eyeIndex from u3GroupID.z
uint eyeIndex = u3GroupID.z;
uint2 tileIDX = u3GroupID.xy;
uint t=threadID;

// XRTODO: Stereo-ize by passing in eyeIndex
#ifdef PERFORM_SPHERICAL_INTERSECTION_TESTS
iNrCoarseLights = SphericalIntersectionTests( t, iNrCoarseLights, float2(min(viTilLL.xy+uint2(TILE_SIZE_CLUSTERED/2,TILE_SIZE_CLUSTERED/2), uint2(g_screenSize.x-1, g_screenSize.y-1))) );
iNrCoarseLights = SphericalIntersectionTests( t, iNrCoarseLights, float2(min(viTilLL.xy+uint2(TILE_SIZE_CLUSTERED/2,TILE_SIZE_CLUSTERED/2), uint2(g_screenSize.x-1, g_screenSize.y-1))), eyeIndex );
// XRTODO: Stereo-ize access to GetLinearDepth with eyeIndex
// XRTODO - DONE: Stereo-ize access to GetLinearDepth with eyeIndex
float fTileFarPlane = GetLinearDepth(dpt_ma);
float fTileFarPlane = GetLinearDepth(dpt_ma, eyeIndex);
float fTileFarPlane = -GetLinearDepth(dpt_ma);
float fTileFarPlane = -GetLinearDepth(dpt_ma, eyeIndex);
#endif
float suggestedBase = SuggestLogBase50(fTileFarPlane);
#else // ENABLE_DEPTH_TEXTURE_BACKPLANE

// XRTODO: Stereo-ize by passing in eyeIndex
#ifdef EXACT_EDGE_TESTS
iNrCoarseLights = CullByExactEdgeTests(t, iNrCoarseLights, viTilLL.xy, viTilUR.xy, fTileFarPlane);
iNrCoarseLights = CullByExactEdgeTests(t, iNrCoarseLights, viTilLL.xy, viTilUR.xy, fTileFarPlane, eyeIndex);
#endif
// sort lights (gives a more efficient execution in both deferred and tiled forward lighting).

// It's for the cluster in the tile (the depth layer slice whatever)
const int l0 = coarseList[2*l+0], l1 = coarseList[min(2*l+1,iNrCoarseLights-1)];
// XRTODO: Stereo-ize GetLinearDepth with eyeIndex
const unsigned int clustIdxMi0 = (const unsigned int) min(255,SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l0].z), suggestedBase));
const unsigned int clustIdxMa0 = (const unsigned int) min(255,SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l0+g_iNrVisibLights].z), suggestedBase));
const unsigned int clustIdxMi1 = (const unsigned int) min(255,SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l1].z), suggestedBase));
const unsigned int clustIdxMa1 = (const unsigned int) min(255,SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l1+g_iNrVisibLights].z), suggestedBase));
// XRTODO - DONE: Stereo-ize GetLinearDepth with eyeIndex
const unsigned int clustIdxMi0 = (const unsigned int)min(255, SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l0].z, eyeIndex), suggestedBase));
const unsigned int clustIdxMa0 = (const unsigned int)min(255, SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l0 + g_iNrVisibLights].z, eyeIndex), suggestedBase));
const unsigned int clustIdxMi1 = (const unsigned int)min(255, SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l1].z, eyeIndex), suggestedBase));
const unsigned int clustIdxMa1 = (const unsigned int)min(255, SnapToClusterIdx(GetLinearDepth(g_vBoundsBuffer[l1 + g_iNrVisibLights].z, eyeIndex), suggestedBase));
clusterIdxs[l] = (clustIdxMa1<<24) | (clustIdxMi1<<16) | (clustIdxMa0<<8) | (clustIdxMi0<<0);
}
}

for(int l=ll; l<min(iNrCoarseLights,(ll+4)); l++)
{
// XRTODO: Stereo-ize CheckIntersection by passing in eyeIndex to GetViewPosFromLinDepth
if(offs<(start+iSpaceAvail) && i<nrClusters && CheckIntersection(l, i, viTilLL.xy, viTilUR.xy, suggestedBase) )
// XRTODO - DONE: Stereo-ize CheckIntersection by passing in eyeIndex to GetViewPosFromLinDepth
if(offs<(start+iSpaceAvail) && i<nrClusters && CheckIntersection(l, i, viTilLL.xy, viTilUR.xy, suggestedBase, eyeIndex) )
{
// XRTODO: Stereo-ize index into _LightVolumeData, run coarseList[l] thru GenerateLightCullDataIndex
uint lightCategory = _LightVolumeData[coarseList[l]].lightCategory;

// XRTODO: Stereo-ize for a bunch of use cases! Pass in eyeIndex!
// XRTODO - DONE: Stereo-ize for a bunch of use cases! Pass in eyeIndex!
int SphericalIntersectionTests(uint threadID, int iNrCoarseLights, float2 screenCoordinate)
int SphericalIntersectionTests(uint threadID, int iNrCoarseLights, float2 screenCoordinate, uint eyeIndex)
// XRTODO: Stereo-ize access with eyeIndex
// XRTODO - DONE: Stereo-ize access with eyeIndex
float3 V = GetViewPosFromLinDepth( screenCoordinate, 1.0);
float3 V = GetViewPosFromLinDepth( screenCoordinate, 1.0, eyeIndex);
float3 V = GetViewPosFromLinDepth( screenCoordinate, -1.0);
float3 V = GetViewPosFromLinDepth( screenCoordinate, -1.0, eyeIndex);
// XRTODO: Stereo-ize access with eyeIndex
float onePixDiagDist = GetOnePixDiagWorldDistAtDepthOne();
// XRTODO - DONE: Stereo-ize access with eyeIndex
float onePixDiagDist = GetOnePixDiagWorldDistAtDepthOne(eyeIndex);
float halfTileSizeAtZDistOne = (TILE_SIZE_CLUSTERED/2)*onePixDiagDist; // scale by half a tile
for(int l=threadID; l<iNrCoarseLights; l+=NR_THREADS)

#ifdef EXACT_EDGE_TESTS
// XRTODO: Stereo-ize for access to GetViewPosFromLinDepth, use eyeIndex
float3 GetTileVertex(uint2 viTilLL, uint2 viTilUR, int i, float fTileFarPlane)
// XRTODO - DONE: Stereo-ize for access to GetViewPosFromLinDepth, use eyeIndex
float3 GetTileVertex(uint2 viTilLL, uint2 viTilUR, int i, float fTileFarPlane, uint eyeIndex)
{
float x = (i&1)==0 ? viTilLL.x : viTilUR.x;
float y = (i&2)==0 ? viTilLL.y : viTilUR.y;

#endif
return GetViewPosFromLinDepth( float2(x, y), z);
// XRTODO - DONE: Pass in eyeIndex
return GetViewPosFromLinDepth( float2(x, y), z, eyeIndex);
// XRTODO: Stereo-ize for access to GetTileVertex, use eyeIndex
void GetFrustEdge(out float3 vP0, out float3 vE0, const int e0, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane)
// XRTODO - DONE: Stereo-ize for access to GetTileVertex, use eyeIndex
void GetFrustEdge(out float3 vP0, out float3 vE0, const int e0, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane, uint eyeIndex)
vP0 = GetTileVertex(uint2(viTilLL.x, viTilUR.y), uint2(viTilUR.x, viTilLL.y), i, fTileFarPlane);
// XRTODO: Pass in eyeIndex
vP0 = GetTileVertex(uint2(viTilLL.x, viTilUR.y), uint2(viTilUR.x, viTilLL.y), i, fTileFarPlane, eyeIndex);
#if USE_LEFT_HAND_CAMERA_SPACE
float3 edgeSectionZero = g_isOrthographic==0 ? vP0 : float3(0.0,0.0,1.0);

// XRTODO: Stereo-ize with eyeIndex, used for indexing _LightVolumeData and g_data,
// and with GetFrustEdge and GetTileVertex functions
int CullByExactEdgeTests(uint threadID, int iNrCoarseLights, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane)
int CullByExactEdgeTests(uint threadID, int iNrCoarseLights, uint2 viTilLL, uint2 viTilUR, float fTileFarPlane, uint eyeIndex)
{
if(threadID==0) lightOffs2 = 0;

float3 vP1, vE1;
// XRTODO: Stereo-ize to use GetFrustEdge, use eyeIndex
GetFrustEdge(vP1, vE1, e1, viTilLL, viTilUR, fTileFarPlane);
// XRTODO - DONE: Stereo-ize to use GetFrustEdge, use eyeIndex
GetFrustEdge(vP1, vE1, e1, viTilLL, viTilUR, fTileFarPlane, eyeIndex);
// potential separation plane
float3 vN = cross(vE0, vE1);

positive=0; negative=0;
for(int j=0; j<8; j++)
{
// XRTODO: Stereo-ize to use GetTileVertex, use eyeIndex
float3 vPf = GetTileVertex(viTilLL, viTilUR, j, fTileFarPlane);
// XRTODO - DONE: Stereo-ize to use GetTileVertex, use eyeIndex
float3 vPf = GetTileVertex(viTilLL, viTilUR, j, fTileFarPlane, eyeIndex);
float fSignDist = dot(vN, vPf-vP0);
if(fSignDist>0) ++positive; else if(fSignDist<0) ++negative;
}

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