Changing vertex data interfaces

res/shaders/DepthCullingTask.slang

@@ -20,7 +20,7 @@ ParameterBlock<DepthData> pDepthAttachment;
 
 bool isBoxVisible(AABB bounding)
 {
-    uint2 mipDimensions = uint2((uint(pViewParams.screenDimensions.x) + BLOCK_SIZE - 1) / BLOCK_SIZE, (uint(pViewParams.screenDimensions.y) + BLOCK_SIZE - 1) / BLOCK_SIZE);
+    uint2 mipDimensions = uint2(uint(pViewParams.screenDimensions.x), uint(pViewParams.screenDimensions.y));
     // now we calculate what mip level we need to only sample up to 4 texels covering the entire meshlet
     uint2 screenCornerMin = mipDimensions;
     uint2 screenCornerMax = uint2(0, 0);
@@ -39,7 +39,7 @@ bool isBoxVisible(AABB bounding)
         for(uint i = 0; i < 8; ++i)
         {
             float4 clipCorner = mul(modelViewProjection, corners[i]);
-            float4 screenCorner = clipToScreen(clipCorner) / BLOCK_SIZE;
+            float4 screenCorner = clipToScreen(clipCorner);
             screenCornerMin = uint2(min(screenCornerMin.x, uint(screenCorner.x)), min(screenCornerMin.y, uint(screenCorner.y)));
             screenCornerMax = uint2(max(screenCornerMax.x, uint(screenCorner.x)), max(screenCornerMax.y, uint(screenCorner.y)));
             maxDepth = max(maxDepth, screenCorner.z);

res/shaders/DepthMipGen.slang

@@ -51,32 +51,16 @@ void reduceLevel(
     setDstDepth(minCoords / 2, minDepth);
 }
 
-groupshared uint uMinDepth;
-
 [numthreads(BLOCK_SIZE, BLOCK_SIZE, 1)]
 [shader("compute")]
 void initialReduce(
     uint3 threadID: SV_GroupThreadID,
     uint3 groupID: SV_GroupID,
 ) {
-    uint reducedWidth = uint(pViewParams.screenDimensions.x) / BLOCK_SIZE;
+    uint width = uint(pViewParams.screenDimensions.x);
     int2 groupOffset = groupID.xy * BLOCK_SIZE;
     int2 texCoord = groupOffset + threadID.xy;
     float fDepth = pDepthAttachment.texture.Load(int3(texCoord, 0)).r;
-    uint uDepth = asuint(fDepth);
-    if(groupID.x == 0 && groupID.y == 0)
-    {
-        uMinDepth = 0xffffffff;
-    }
-    GroupMemoryBarrierWithGroupSync();
-
-    InterlockedMin(uMinDepth, uDepth);
+    pDepthAttachment.buffer[texCoord.x + (texCoord.y * width)] = fDepth;
     
-    GroupMemoryBarrierWithGroupSync();
-
-    float fMinDepth = asfloat(uMinDepth);
-    if(threadID.x == 0 && threadID.y == 0)
-    {
-        pDepthAttachment.buffer[groupID.x + (groupID.y * reducedWidth)] = fMinDepth;
-    }
 }

res/shaders/lib/Scene.slang

@@ -22,7 +22,7 @@ struct MeshData
 
 static const uint32_t MAX_VERTICES = 256;
 static const uint32_t MAX_PRIMITIVES = 256;
-static const uint32_t TASK_GROUP_SIZE = 128;
+static const uint32_t TASK_GROUP_SIZE = 32;
 static const uint32_t MESH_GROUP_SIZE = 32;
 static const uint32_t MAX_MESHLETS_PER_INSTANCE = 2048;