Method OnComponentAdded

Engine/source/EtFramework/Systems/AudioSourceSystem.cpp:28–73

----------------------------------- AudioSourceSystem::OnComponentAdded Register transform components in the render scene when they are added to the ECS

// Register transform components in the render scene when they are added to the ECS
//
void AudioSourceSystem::OnComponentAdded(EcsController& controller, AudioSourceComponent& component, T_EntityId const entity)
{
	// generate the source handle
	alGenSources((ALuint)1, &component.m_Source);
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL gen sources error"));

	// are we 3D ?
	if (controller.HasComponent<TransformComponent>(entity))
	{
		controller.AddComponents(entity, AudioSource3DComponent());
	}
	else // make our component play audio globally
	{
		alSourcei(component.m_Source, AL_SOURCE_RELATIVE, AL_TRUE);
		ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source relative error"));

		// set the source dist to be the ref dist in front of the listener, so it will always be at default volume
		alSource3f(component.m_Source, AL_POSITION, 0.f, 0.f, -1.f);
		ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source position error"));
	}

	// set source params
	alSourcef(component.m_Source, AL_GAIN, component.m_Gain);
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source gain error"));

	alSourcef(component.m_Source, AL_MIN_GAIN, component.m_MinGain);
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source min gain error"));

	alSourcef(component.m_Source, AL_MAX_GAIN, component.m_MaxGain);
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source max gain error"));

	alSourcef(component.m_Source, AL_PITCH, component.m_Pitch);
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source pitch error"));

	alSourcei(component.m_Source, AL_LOOPING, (component.m_IsLooping ? AL_TRUE : AL_FALSE));
	ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source looping error"));

	// set the audio track
	//---------------------
	if (component.m_NextTrack != 0u)
	{
		component.m_AudioData = core::ResourceManager::Instance()->GetAssetData<AudioData>(component.m_NextTrack);
		alSourcei(component.m_Source, AL_BUFFER, component.m_AudioData->GetHandle());
		ET_ASSERT(!AudioManager::GetInstance()->TestALError("AL source buffer error"));
	}
}

//-------------------------------------
// AudioSourceSystem::OnComponentRemoved