genesis-3d_engine/Engine/app/graphicfeature/components/locatercomponent.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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****************************************************************************/

#include "stdneb.h"
#include "graphicfeature/components/locatercomponent.h"
#include "graphicfeature/components/animationcomponent.h"


namespace App
{
	__ImplementClass(LocaterComponent, 'LCTC', App::Component);
	LocaterComponent::LocaterComponent(void)
		: firstLoaded(false),
		isAnimPlay(false),
		isLastFramePlay(false),
		m_bAttedToAttachedList(false),
		mAttachedSkelIndex(-1)
	{

		mDefaultPos = Math::vector::nullvec();

		mLastAnimTrans = Math::matrix44::identity();
		mRelativeTrans = Math::matrix44::identity(); 
	}


	LocaterComponent::~LocaterComponent(void)
	{
	}
	
	void LocaterComponent::OnActivate()
	{
		Super::OnActivate();
	}

	void LocaterComponent::OnDeactivate()
	{
		Super::OnDeactivate();
	}

	void LocaterComponent::SetupAcceptedMessages()
	{
		Super::SetupAcceptedMessages();
	}

	void LocaterComponent::HandleMessage( const GPtr<Messaging::Message>& msg )
	{
		Super::HandleMessage(msg);
	}

	void LocaterComponent::SetupCallbacks()
	{
		mActor->RegisterComponentCallback(this, EndFrame);
		mActor->RegisterComponentCallback(this, BeginFrame);
		mActor->RegisterComponentCallback(this, OnFrame);
	}

	void LocaterComponent::_OnBeginFrame()
	{
		Super::_OnBeginFrame();

		GPtr<App::Actor> parentActor = mActor->GetParent();

		if(!parentActor.isvalid())
		{
			return;
		}

		GPtr<Component> com;
		com = parentActor->FindComponent( AnimationComponent::RTTI );

		if(com.isvalid())
		{
			GPtr<AnimationComponent> animationComponent = com.downcast<AnimationComponent>();
			if(!m_bAttedToAttachedList)
			{
				animationComponent->AddToAttachedActorList(mActor, mAttachedSkelName);
				m_bAttedToAttachedList = true;
			}

			//when animation is playing, the locater maybe updated before skinnedMesh 
			//so the animation data must be updated, if not, just return
			if(animationComponent->IsAnyAnimationPlaying() && animationComponent->IsToParentXEmpty())
				return;

			if(mAttachedSkelIndex == InvalidIndex)
			{
				mAttachedSkelIndex = animationComponent->GetNodeIndex(mAttachedSkelName);
			}

			if(m_bNeedSetup)
			{
				mLastAnimTrans = Math::matrix44::identity();
				if(mActor)
				{
					mActor->SetPosition(Math::vector(0.0f,0.0f,0.0f));
					mActor->SetRotation(Math::quaternion(0.0f,0.0f,0.0f,1.0f));
				}
				m_bNeedSetup = false;
			}

			Math::matrix44 NodeTrans = Math::matrix44::identity();
			bool ret = animationComponent->GetNodeTransform(mAttachedSkelIndex, NodeTrans);
			if(!ret)
				ret = animationComponent->GetNodeTransform(mAttachedSkelName, NodeTrans);

			Math::matrix44 finalTrans;

			Math::matrix44 actorTrans = mActor->GetTransform();


			if(!firstLoaded)
			{
				Math::matrix44 NodeTransInv = Math::matrix44::inverse(mLastAnimTrans);
				mRelativeTrans = Math::matrix44::multiply(NodeTransInv,actorTrans);	
			}
			firstLoaded = false;

			finalTrans = Math::matrix44::multiply(NodeTrans,mRelativeTrans);
			finalTrans.setrow3( Math::float4(0.0f,0.0f,0.0f,1.0f));
			mActor->SetTransform(finalTrans);

			mLastAnimTrans = NodeTrans;
		}
	}


	void LocaterComponent::_OnFrame()
	{
		Super::_OnFrame();	
	}

	void LocaterComponent::_OnEndFrame()
	{
		Super::_OnEndFrame();
	}

	void LocaterComponent::SetupLocater()
	{
		m_bNeedSetup = true;
	}

	void LocaterComponent::CopyFrom( const GPtr<Component>& pComponent )
	{
		if( !pComponent.isvalid()  )
			return;
		if( !pComponent->GetRtti()->IsDerivedFrom( *(this->GetRtti()) ) )
			return;
		// TODO:

		GPtr<LocaterComponent> pSource = pComponent.downcast<LocaterComponent>();
		n_assert(pSource.isvalid());

		const Util::String attachedSkelName = pSource->GetAttachedSkelName();
		this->SetAttachedSkelName(attachedSkelName);
		const Math::matrix44 relativeTrans = pSource->GetRelativeTrans();
		this->SetRelativeTrans(relativeTrans);
	}

}