Mindgames/Library/PackageCache/com.unity.visualeffectgraph@6.9.0-preview/Shaders/VFXInit.template

   1 #pragma kernel CSMain
   2 ${VFXGlobalInclude}
   3 ${VFXGlobalDeclaration}
   4 ${VFXPerPassInclude}
   5
   6 RWByteAddressBuffer attributeBuffer;
   7 ByteAddressBuffer sourceAttributeBuffer;
   8
   9 CBUFFER_START(initParams)
  10 #if !VFX_USE_SPAWNER_FROM_GPU
  11     uint nbSpawned;                                     // Numbers of particle spawned
  12     uint spawnIndex;                            // Index of the first particle spawned
  13     uint dispatchWidth;
  14 #else
  15     uint offsetInAdditionalOutput;
  16         uint nbMax;
  17 #endif
  18         uint systemSeed;
  19 CBUFFER_END
  20
  21 #if VFX_USE_ALIVE_CURRENT
  22 RWStructuredBuffer<uint> deadListIn;
  23 ByteAddressBuffer deadListCount; // This is bad to use a SRV to fetch deadList count but Unity API currently prevent from copying to CB
  24 #endif
  25
  26 #if VFX_USE_SPAWNER_FROM_GPU
  27 StructuredBuffer<uint> eventList;
  28 ByteAddressBuffer inputAdditional;
  29 #endif
  30
  31 ${VFXGeneratedBlockFunction}
  32
  33 [numthreads(NB_THREADS_PER_GROUP,1,1)]
  34 void CSMain(uint3 groupId          : SV_GroupID,
  35             uint3 groupThreadId    : SV_GroupThreadID)
  36 {
  37     uint id = groupThreadId.x + groupId.x * NB_THREADS_PER_GROUP;
  38 #if !VFX_USE_SPAWNER_FROM_GPU
  39     id += groupId.y * dispatchWidth * NB_THREADS_PER_GROUP;
  40 #endif
  41
  42 #if VFX_USE_SPAWNER_FROM_GPU
  43     uint maxThreadId = inputAdditional.Load((offsetInAdditionalOutput * 2 + 0) << 2);
  44     uint currentSpawnIndex = inputAdditional.Load((offsetInAdditionalOutput * 2 + 1) << 2) - maxThreadId;
  45 #else
  46     uint maxThreadId = nbSpawned;
  47     uint currentSpawnIndex = spawnIndex;
  48 #endif
  49
  50 #if VFX_USE_ALIVE_CURRENT
  51     maxThreadId = min(maxThreadId, deadListCount.Load(0x0));
  52 #elif VFX_USE_SPAWNER_FROM_GPU
  53     maxThreadId = min(maxThreadId, nbMax); //otherwise, nbSpawned already clamped on CPU
  54 #endif
  55
  56     if (id < maxThreadId)
  57     {
  58 #if VFX_USE_SPAWNER_FROM_GPU
  59         int sourceIndex = eventList[id];
  60 #endif
  61         uint particleIndex = id + currentSpawnIndex;
  62
  63 #if !VFX_USE_SPAWNER_FROM_GPU
  64         ${VFXComputeSourceIndex}
  65 #endif
  66         ${VFXLoadAttributes}
  67 #if VFX_USE_PARTICLEID_CURRENT
  68          particleId = particleIndex;
  69 #endif
  70 #if VFX_USE_SEED_CURRENT
  71         seed = WangHash(particleIndex ^ systemSeed);
  72 #endif
  73
  74         ${VFXProcessBlocks}
  75
  76 #if VFX_USE_ALIVE_CURRENT
  77         if (alive)
  78         {
  79                         uint deadIndex = deadListIn.DecrementCounter();
  80             uint index = deadListIn[deadIndex];
  81             ${VFXStoreAttributes}
  82         }
  83 #else
  84         uint index = particleIndex;
  85         ${VFXStoreAttributes}
  86 #endif
  87     }
  88 }