void PrepareParallelTasks()
{
//create a collection of task that will run in parallel on several threads.
//the number of threads and tasks to perform are not dependent.
_multiParallelTasks = new MultiThreadedParallelTaskCollection(NUM_OF_SVELTO_THREADS, true);
//in this case though we just want to perform a task for each thread
//ParticlesCPUKernel is a task (IEnumerator) that executes the
//algebra operation on the particles. Each task perform the operation
//on particlesPerThread particles
#if BENCHMARK
pc = new ParticleCounter(particlesPerThread - 16);
#else
_pc = new ParticleCounter(0);
#endif
#if OLD_STYLE
//calculate the number of particles per thread
uint particlesPerThread = _particleCount / NUM_OF_SVELTO_THREADS;
for (int i = 0; i < NUM_OF_SVELTO_THREADS; i++)
{
_multiParallelTasks.Add(new ParticlesCPUKernel((int)(particlesPerThread * i), (int)particlesPerThread, this, _pc));
}
#else
var particlesCpuKernel = new ParticlesCPUKernel(this);
_multiParallelTasks.Add(ref particlesCpuKernel, (int)_particleCount);
#endif
}
IEnumerator MainThreadOperations(ParticleCounter particleCounter)
{
var bounds = new Bounds(_BoundCenter, _BoundSize);
var syncRunner = new SyncRunner();
//these will help with synchronization between threads
WaitForSignalEnumerator _waitForSignal = new WaitForSignalEnumerator(() => _breakIt);
WaitForSignalEnumerator _otherwaitForSignal = new WaitForSignalEnumerator();
//Start the operations on other threads
OperationsRunningOnOtherThreads(_waitForSignal, _otherwaitForSignal)
.ThreadSafeRunOnSchedule(StandardSchedulers.multiThreadScheduler);
//start the mainloop
while (true)
{
_time = Time.time / 10;
//wait until the other thread tell us that the data is ready to be used.
//Note that I am stalling the main thread here! This is entirely up to you
//if you don't want to stall it, as you can see with the other use cases
_otherwaitForSignal.RunOnSchedule(syncRunner);
#if BENCHMARK
if (PerformanceCheker.PerformanceProfiler.showingFPSValue > 30.0f)
{
if (particleCounter.particlesLimit >= 16)
{
particleCounter.particlesLimit -= 16;
}
PerformanceCheker.PerformanceProfiler.particlesCount = particleCounter.particlesTransformed;
}
particleCounter.particlesTransformed = 0;
#endif
_particleDataBuffer.SetData(_gpuparticleDataArr);
//render the particles. I use DrawMeshInstancedIndirect but
//there aren't any compute shaders running. This is so cool!
Graphics.DrawMeshInstancedIndirect(_pointMesh, 0, _material,
bounds, _GPUInstancingArgsBuffer);
//tell to the other thread that now it can perform the operations
//for the next frame.
_waitForSignal.Signal();
//continue the cycle on the next frame
yield return(null);
}
}
void FixedUpdate()
{
emitCount += emitRate * Time.deltaTime;
if (_reset)
{
ResetBuffer();
return;
}
SetEmitInfoBuffer();
DispatchEmitCount();
if (emitCount > 0)
{
DispatchEmitParticle();
}
DispatchUpdateParticle();
Swap <ComputeBuffer>(ref alivelistCB, ref alivelistSecCB); // Swap alive list
DispatchDrawArg();
if (_debug)
{
ParticleCounter[] particleC = new ParticleCounter[] { new ParticleCounter() };
uint[] arg = new uint[5] {
0, 0, 0, 0, 0
};
uint[] indirectB = new uint[3];
uint[] alivelist = new uint[maxParticle];
uint[] alivelistSec = new uint[maxParticle];
alivelistCB.GetData(alivelist);
alivelistSecCB.GetData(alivelistSec);
int aliveC = GetBufferCount(alivelistCB);
int aliveSecC = GetBufferCount(alivelistSecCB);
int deadlistC = GetBufferCount(deadlistCB);
instancingArgCB.GetData(arg);
particleCounterCB.GetData(particleC);
updateIndirectCB.GetData(indirectB);
emitParticleInfoCB.GetData(emitInfoParam);
int z = 0;
}
prevPosition = transform.position;
emitCount -= (uint)emitCount;
}
