//this file is autogenerated using stringify.bat (premake --stringify) in the build folder of this project static const char* gridBroadphaseCL= \ "int getPosHash(int4 gridPos, __global float4* pParams)\n" "{\n" " int4 gridDim = *((__global int4*)(pParams + 1));\n" " gridPos.x &= gridDim.x - 1;\n" " gridPos.y &= gridDim.y - 1;\n" " gridPos.z &= gridDim.z - 1;\n" " int hash = gridPos.z * gridDim.y * gridDim.x + gridPos.y * gridDim.x + gridPos.x;\n" " return hash;\n" "} \n" "int4 getGridPos(float4 worldPos, __global float4* pParams)\n" "{\n" " int4 gridPos;\n" " int4 gridDim = *((__global int4*)(pParams + 1));\n" " gridPos.x = (int)floor(worldPos.x * pParams[0].x) & (gridDim.x - 1);\n" " gridPos.y = (int)floor(worldPos.y * pParams[0].y) & (gridDim.y - 1);\n" " gridPos.z = (int)floor(worldPos.z * pParams[0].z) & (gridDim.z - 1);\n" " return gridPos;\n" "}\n" "// calculate grid hash value for each body using its AABB\n" "__kernel void kCalcHashAABB(int numObjects, __global float4* allpAABB, __global const int* smallAabbMapping, __global int2* pHash, __global float4* pParams )\n" "{\n" " int index = get_global_id(0);\n" " if(index >= numObjects)\n" " {\n" " return;\n" " }\n" " float4 bbMin = allpAABB[smallAabbMapping[index]*2];\n" " float4 bbMax = allpAABB[smallAabbMapping[index]*2 + 1];\n" " float4 pos;\n" " pos.x = (bbMin.x + bbMax.x) * 0.5f;\n" " pos.y = (bbMin.y + bbMax.y) * 0.5f;\n" " pos.z = (bbMin.z + bbMax.z) * 0.5f;\n" " pos.w = 0.f;\n" " // get address in grid\n" " int4 gridPos = getGridPos(pos, pParams);\n" " int gridHash = getPosHash(gridPos, pParams);\n" " // store grid hash and body index\n" " int2 hashVal;\n" " hashVal.x = gridHash;\n" " hashVal.y = index;\n" " pHash[index] = hashVal;\n" "}\n" "__kernel void kClearCellStart( int numCells, \n" " __global int* pCellStart )\n" "{\n" " int index = get_global_id(0);\n" " if(index >= numCells)\n" " {\n" " return;\n" " }\n" " pCellStart[index] = -1;\n" "}\n" "__kernel void kFindCellStart(int numObjects, __global int2* pHash, __global int* cellStart )\n" "{\n" " __local int sharedHash[513];\n" " int index = get_global_id(0);\n" " int2 sortedData;\n" " if(index < numObjects)\n" " {\n" " sortedData = pHash[index];\n" " // Load hash data into shared memory so that we can look \n" " // at neighboring body's hash value without loading\n" " // two hash values per thread\n" " sharedHash[get_local_id(0) + 1] = sortedData.x;\n" " if((index > 0) && (get_local_id(0) == 0))\n" " {\n" " // first thread in block must load neighbor body hash\n" " sharedHash[0] = pHash[index-1].x;\n" " }\n" " }\n" " barrier(CLK_LOCAL_MEM_FENCE);\n" " if(index < numObjects)\n" " {\n" " if((index == 0) || (sortedData.x != sharedHash[get_local_id(0)]))\n" " {\n" " cellStart[sortedData.x] = index;\n" " }\n" " }\n" "}\n" "int testAABBOverlap(float4 min0, float4 max0, float4 min1, float4 max1)\n" "{\n" " return (min0.x <= max1.x)&& (min1.x <= max0.x) && \n" " (min0.y <= max1.y)&& (min1.y <= max0.y) && \n" " (min0.z <= max1.z)&& (min1.z <= max0.z); \n" "}\n" "//search for AABB 'index' against other AABBs' in this cell\n" "void findPairsInCell( int numObjects,\n" " int4 gridPos,\n" " int index,\n" " __global int2* pHash,\n" " __global int* pCellStart,\n" " __global float4* allpAABB, \n" " __global const int* smallAabbMapping,\n" " __global float4* pParams,\n" " volatile __global int* pairCount,\n" " __global int4* pPairBuff2,\n" " int maxPairs\n" " )\n" "{\n" " int4 pGridDim = *((__global int4*)(pParams + 1));\n" " int maxBodiesPerCell = pGridDim.w;\n" " int gridHash = getPosHash(gridPos, pParams);\n" " // get start of bucket for this cell\n" " int bucketStart = pCellStart[gridHash];\n" " if (bucketStart == -1)\n" " {\n" " return; // cell empty\n" " }\n" " // iterate over bodies in this cell\n" " int2 sortedData = pHash[index];\n" " int unsorted_indx = sortedData.y;\n" " float4 min0 = allpAABB[smallAabbMapping[unsorted_indx]*2 + 0]; \n" " float4 max0 = allpAABB[smallAabbMapping[unsorted_indx]*2 + 1];\n" " int handleIndex = as_int(min0.w);\n" " \n" " int bucketEnd = bucketStart + maxBodiesPerCell;\n" " bucketEnd = (bucketEnd > numObjects) ? numObjects : bucketEnd;\n" " for(int index2 = bucketStart; index2 < bucketEnd; index2++) \n" " {\n" " int2 cellData = pHash[index2];\n" " if (cellData.x != gridHash)\n" " {\n" " break; // no longer in same bucket\n" " }\n" " int unsorted_indx2 = cellData.y;\n" " //if (unsorted_indx2 < unsorted_indx) // check not colliding with self\n" " if (unsorted_indx2 != unsorted_indx) // check not colliding with self\n" " { \n" " float4 min1 = allpAABB[smallAabbMapping[unsorted_indx2]*2 + 0];\n" " float4 max1 = allpAABB[smallAabbMapping[unsorted_indx2]*2 + 1];\n" " if(testAABBOverlap(min0, max0, min1, max1))\n" " {\n" " if (pairCount)\n" " {\n" " int handleIndex2 = as_int(min1.w);\n" " if (handleIndex= numObjects)\n" " {\n" " return;\n" " }\n" " int2 sortedData = pHash[index];\n" " int unsorted_indx = sortedData.y;\n" " float4 bbMin = allpAABB[smallAabbMapping[unsorted_indx]*2 + 0];\n" " float4 bbMax = allpAABB[smallAabbMapping[unsorted_indx]*2 + 1];\n" " float4 pos;\n" " pos.x = (bbMin.x + bbMax.x) * 0.5f;\n" " pos.y = (bbMin.y + bbMax.y) * 0.5f;\n" " pos.z = (bbMin.z + bbMax.z) * 0.5f;\n" " // get address in grid\n" " int4 gridPosA = getGridPos(pos, pParams);\n" " int4 gridPosB; \n" " // examine only neighbouring cells\n" " for(int z=-1; z<=1; z++) \n" " {\n" " gridPosB.z = gridPosA.z + z;\n" " for(int y=-1; y<=1; y++) \n" " {\n" " gridPosB.y = gridPosA.y + y;\n" " for(int x=-1; x<=1; x++) \n" " {\n" " gridPosB.x = gridPosA.x + x;\n" " findPairsInCell(numObjects, gridPosB, index, pHash, pCellStart, allpAABB,smallAabbMapping, pParams, pairCount,pPairBuff2, maxPairs);\n" " }\n" " }\n" " }\n" "}\n" ;