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// ----------------------------------------------------------------
// From Game Programming in C++ by Sanjay Madhav
// Copyright (C) 2017 Sanjay Madhav. All rights reserved.
// Released under the BSD License
// See LICENSE in root directory for full details.
// ----------------------------------------------------------------
#include "AudioComponent.h"
#include "Actor.h"
#include "Game.h"
#include "AudioSystem.h"
AudioComponent::AudioComponent(Actor* owner, int updateOrder)
	:Component(owner, updateOrder)
AudioComponent::~AudioComponent()
	StopAllEvents();
void AudioComponent::Update(float deltaTime)
	Component::Update(deltaTime);
	// Remove invalid 2D events
	auto iter = mEvents2D.begin();
	while (iter != mEvents2D.end())
		if (!iter->IsValid())
			iter = mEvents2D.erase(iter);
	// Remove invalid 3D events
	iter = mEvents3D.begin();
	while (iter != mEvents3D.end())
		if (!iter->IsValid())
			iter = mEvents3D.erase(iter);
void AudioComponent::OnUpdateWorldTransform()
	// Update 3D events' world transforms
	Matrix4 world = mOwner->GetWorldTransform();
	for (auto& event : mEvents3D)
		if (event.IsValid())
			event.Set3DAttributes(world);
SoundEvent AudioComponent::PlayEvent(const std::string& name)
	SoundEvent e = mOwner->GetGame()->GetAudioSystem()->PlayEvent(name);
	// Is this 2D or 3D?
	if (e.Is3D())
		mEvents3D.emplace_back(e);
		// Set initial 3D attributes
		e.Set3DAttributes(mOwner->GetWorldTransform());
		mEvents2D.emplace_back(e);
void AudioComponent::StopAllEvents()
	// Stop all sounds
	for (auto& e : mEvents2D)
		e.Stop();
	for (auto& e : mEvents3D)
		e.Stop();
	// Clear events
	mEvents2D.clear();
	mEvents3D.clear();

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