ParticleSource.cpp

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#include "Headers/ParticleSource.h"
#include "Core/Headers/PlatformContext.h"
#include "Platform/Video/Headers/GFXDevice.h"
 
namespace Divide {
 
ParticleSource::ParticleSource(GFXDevice& context) noexcept
    : ParticleSource(context, 0)
{
}
 
ParticleSource::ParticleSource(GFXDevice& context, const F32 emitRate) noexcept
    : _emitRate(emitRate),
      _context(context)
{
}
 
void ParticleSource::emit(const U64 deltaTimeUS, const std::shared_ptr<ParticleData>& p) {
    ParticleData& data = *p;
 
    const F32 dt = Time::MicrosecondsToSeconds<F32>(deltaTimeUS);
    const U32 maxNewParticles = to_U32(dt * _emitRate);
    const U32 startID = data.aliveCount();
    const U32 endID = std::min(startID + maxNewParticles, data.totalCount() - 1);
 
    TaskPool& pool = _context.context().taskPool(TaskPoolType::HIGH_PRIORITY);
 
    Task* generateTask = CreateTask(TASK_NOP);
    for (const std::shared_ptr<ParticleGenerator>& gen : _particleGenerators) {
        gen->generate(*generateTask, pool, deltaTimeUS, data, startID, endID);
    }
 
    Start(*generateTask, pool);
    Wait(*generateTask, pool);
 
    for (U32 i = startID; i < endID; ++i) {
        p->wake(i);
    }
}
 
} //namespace Divide