/// Renders all the particle systems. Passing in false for doUpdate allows
/// you to render the systems multiple times per frame without updating. This
/// is useful when a shader requires multiple passes (such as water reflection)
/// \param doUpdate Whether the systems should be updated before rendering
void ParticleEngine::render(bool doUpdate)
{
static SystemSortedSet sortedSystems;
sortedSystems.clear();
if(m_UIDMap.size() == 0)
return;
if(doUpdate)
updateSystems();
// render all systems
for(UIDMapIter iter = m_UIDMap.begin(); iter != m_UIDMap.end(); iter++)
{
sortedSystems.insert(iter->second);
}
for(SystemSortedSetIter iter = sortedSystems.rbegin(); iter != sortedSystems.rend(); iter++)
{
(*iter)->render();
}
}
void Engine::run()
{
initializeSystems();
updateSystems();
shutdownSystems();
}
