GameCodingCompleteLinux/Source/GCC4/Actors/TransformComponent.h

#pragma once
//========================================================================
// TransformComponent.h - Component for managing transforms on actors
//
// Part of the GameCode4 Application
//
// GameCode4 is the sample application that encapsulates much of the source code
// discussed in "Game Coding Complete - 4th Edition" by Mike McShaffry and David
// "Rez" Graham, published by Charles River Media. 
// ISBN-10: 1133776574 | ISBN-13: 978-1133776574
//
// If this source code has found it's way to you, and you think it has helped you
// in any way, do the authors a favor and buy a new copy of the book - there are 
// detailed explanations in it that compliment this code well. Buy a copy at Amazon.com
// by clicking here: 
//    http://www.amazon.com/gp/product/1133776574/ref=olp_product_details?ie=UTF8&me=&seller=
//
// There's a companion web site at http://www.mcshaffry.com/GameCode/
// 
// The source code is managed and maintained through Google Code: 
//    http://code.google.com/p/gamecode4/
//
// (c) Copyright 2012 Michael L. McShaffry and David Graham
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser GPL v3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See 
// http://www.gnu.org/licenses/lgpl-3.0.txt for more details.
//
// You should have received a copy of the GNU Lesser GPL v3
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//========================================================================

#include "ActorComponent.h"

//---------------------------------------------------------------------------------------------------------------------
// This component implementation is a very simple representation of the physical aspect of an actor.  It just defines 
// the transform and doesn't register with the physics system at all.
//---------------------------------------------------------------------------------------------------------------------
class TransformComponent : public ActorComponent
{
	glm::mat4 m_transform;
public:
	static const char* g_Name;
	virtual const char* VGetName() const { return g_Name; }

	TransformComponent(void) : m_transform(glm::mat4(1.0)) { }
	virtual bool VInit(TiXmlElement* pData) override;
	virtual TiXmlElement* VGenerateXml(void) override;

	// transform functions
	glm::mat4 GetTransform(void) const { return m_transform; }
	void SetTransform(const glm::mat4& newTransform) { m_transform = newTransform; }
	glm::vec3 GetPosition(void) const { return geometry::GetPosition(m_transform); }
	void SetPosition(const glm::vec3& pos) { geometry::SetPosition(m_transform, pos); }
	glm::vec3 GetLookAt(void) const { return geometry::GetDirection(m_transform); }
};