#include "stdafx.h"
#include "../eterLib/StateManager.h"
#include "../eterLib/Camera.h"

#include "FlyingData.h"
#include "FlyTrace.h"

CDynamicPool<CFlyTrace>		CFlyTrace::ms_kPool;		

void CFlyTrace::DestroySystem()
{
	ms_kPool.Destroy();
}

CFlyTrace* CFlyTrace::New()
{
	return ms_kPool.Alloc();
}

void CFlyTrace::Delete(CFlyTrace* pkInst)
{
	pkInst->Destroy();
	ms_kPool.Free(pkInst);
}

CFlyTrace::CFlyTrace()
{
	__Initialize();

	/*
	// Code for texture
	CGraphicImage * pImage = (CGraphicImage *)CResourceManager::Instance().GetResourcePointer("d:/ray.jpg");
	m_ImageInstance.SetImagePointer(pImage);
	
	CGraphicTexture * pTexture = m_ImageInstance.GetTexturePointer();
	m_lpTexture = pTexture->GetD3DTexture();
	*/
}

CFlyTrace::~CFlyTrace()
{
	Destroy();
}

				
void CFlyTrace::__Initialize()
{
	m_bRectShape=false;
	m_dwColor=0;
	m_fSize=0.0f;
	m_fTailLength=0.0f;	
}

void CFlyTrace::Destroy()
{
	m_TimePositionDeque.clear();

	__Initialize();
}

void CFlyTrace::UpdateNewPosition(const D3DXVECTOR3 & v3Position)
{
	m_TimePositionDeque.push_front(TTimePosition(CTimer::Instance().GetCurrentSecond(),v3Position));
	//Tracenf("%f %f",m_TimePositionDeque.back().first, CTimer::Instance().GetCurrentSecond());
	while(!m_TimePositionDeque.empty() && m_TimePositionDeque.back().first+m_fTailLength<CTimer::Instance().GetCurrentSecond())
	{
		m_TimePositionDeque.pop_back();
	}
}

void CFlyTrace::Create(const CFlyingData::TFlyingAttachData & rFlyingAttachData)
{
	//assert(rFlyingAttachData.bHasTail);
	m_dwColor = rFlyingAttachData.dwTailColor;
	m_fTailLength = rFlyingAttachData.fTailLength;
	m_fSize = rFlyingAttachData.fTailSize;
	m_bRectShape = rFlyingAttachData.bRectShape;
}


void CFlyTrace::Update()
{ 
	
}

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struct TFlyVertex
{
	D3DXVECTOR3 p;
	DWORD c;
	D3DXVECTOR2 t;
	TFlyVertex(){};
	TFlyVertex(const D3DXVECTOR3& p, DWORD c, const D3DXVECTOR2 & t):p(p),c(c),t(t){}
};

struct TFlyVertexSet
{
	TFlyVertex v[6];
	TFlyVertexSet(TFlyVertex * pv)
	{
		memcpy(v,pv,sizeof(v));
	}
	bool operator < (const TFlyVertexSet& ) const
	{
		return false;
	}
	TFlyVertexSet & operator = ( const TFlyVertexSet& rhs )
	{
		memcpy(v,rhs.v,sizeof(v));
		return *this;
	}
};

typedef std::vector<std::pair<float, TFlyVertexSet> > TFlyVertexSetVector;

void CFlyTrace::Render()
{
	if (m_TimePositionDeque.size()<=1)
		return;
	TFlyVertexSetVector VSVector;

	//STATEMANAGER.SaveRenderState(D3DRS_ZFUNC,D3DCMP_LESS);
	STATEMANAGER.SaveRenderState(D3DRS_ZFUNC,D3DCMP_LESS);
	//STATEMANAGER.SaveRenderState(D3DRS_ZWRITEENABLE,FALSE);

	D3DXMATRIX matWorld;
	D3DXMatrixIdentity(&matWorld);
	
	STATEMANAGER.SaveTransform(D3DTS_WORLD, &matWorld);
	STATEMANAGER.SaveVertexShader(D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1);
	STATEMANAGER.SaveRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
	
	STATEMANAGER.SaveRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
	STATEMANAGER.SaveRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
	STATEMANAGER.SaveRenderState(D3DRS_DESTBLEND, D3DBLEND_ONE);

	STATEMANAGER.SaveRenderState(D3DRS_ALPHATESTENABLE, TRUE);
	STATEMANAGER.SaveRenderState(D3DRS_ALPHAFUNC, D3DCMP_GREATER);
	STATEMANAGER.SaveRenderState(D3DRS_ALPHAREF, 0x00000000);

	STATEMANAGER.SaveRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD );
	//STATEMANAGER.SaveRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD );
	
	STATEMANAGER.SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_DIFFUSE);
	STATEMANAGER.SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_TEXTURE);
	//STATEMANAGER.SetTextureStageState(0, D3DTSS_COLOROP, /*(m_bUseTexture)?D3DTOP_SELECTARG2:*/D3DTOP_SELECTARG2);
	STATEMANAGER.SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1);

	STATEMANAGER.SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_DIFFUSE);
	STATEMANAGER.SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_TEXTURE);
	//STATEMANAGER.SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
	STATEMANAGER.SetTextureStageState(0, D3DTSS_ALPHAOP, /*(m_bUseTexture)?D3DTOP_SELECTARG2:*/D3DTOP_SELECTARG1);
	STATEMANAGER.SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);
	STATEMANAGER.SetTextureStageState(1, D3DTSS_ALPHAOP, D3DTOP_DISABLE);
	STATEMANAGER.SetRenderState(D3DRS_LIGHTING, FALSE);
	STATEMANAGER.SetTexture(0, NULL);
	STATEMANAGER.SetTexture(1, NULL);
	
	
	D3DXMATRIX m;
	CScreen s;s.UpdateViewMatrix();
	CCamera * pCurrentCamera = CCameraManager::Instance().GetCurrentCamera();
	if (!pCurrentCamera)
		return;

	const D3DXMATRIX & M = pCurrentCamera->GetViewMatrix();
	D3DXMatrixIdentity(&m);
	D3DXVECTOR3 F(pCurrentCamera->GetView());
	m._31 = F.x;
	m._32 = F.y;
	m._33 = F.z;

	Frustum & frustum = s.GetFrustum();
	//frustum.BuildViewFrustum(ms_matView * ms_matProj);

	TTimePositionDeque::iterator it1, it2;
	it2 = it1 = m_TimePositionDeque.begin();
	++it2;
	for(;it2!=m_TimePositionDeque.end();++it2,++it1)
	{
		const D3DXVECTOR3& rkOld=it1->second;
		const D3DXVECTOR3& rkNew=it2->second;
		D3DXVECTOR3 B = rkNew - rkOld;
		
		float radius = max(fabs(B.x),max(fabs(B.y),fabs(B.z)))/2;
		Vector3d c(it1->second.x+B.x*0.5f,
			it1->second.y+B.y*0.5f,
			it1->second.z+B.z*0.5f
			);
		if (frustum.ViewVolumeTest(c, radius)==VS_OUTSIDE)
			continue;

		float rate1 = (1-(CTimer::Instance().GetCurrentSecond()-it1->first)/m_fTailLength);
		float rate2 = (1-(CTimer::Instance().GetCurrentSecond()-it2->first)/m_fTailLength);
		float size1 = m_fSize;
		float size2 = m_fSize;
		if (!m_bRectShape)
		{
			size1 *= rate1;
			size2 *= rate2;
		}
		TFlyVertex v[6] = 
		{
			TFlyVertex(D3DXVECTOR3(0.0f,size1,0.0f), m_dwColor,D3DXVECTOR2(0.0f,0.0f)),
			TFlyVertex(D3DXVECTOR3(-size1,0.0f,0.0f),m_dwColor,D3DXVECTOR2(0.0f,0.5f)),
			TFlyVertex(D3DXVECTOR3(size1,0.0f,0.0f), m_dwColor,D3DXVECTOR2(0.5f,0.0f)),
			TFlyVertex(D3DXVECTOR3(-size2,0.0f,0.0f),m_dwColor,D3DXVECTOR2(0.5f,1.0f)),
			TFlyVertex(D3DXVECTOR3(size2,0.0f,0.0f), m_dwColor,D3DXVECTOR2(1.0f,0.5f)),
			TFlyVertex(D3DXVECTOR3(0.0f,-size2,0.0f),m_dwColor,D3DXVECTOR2(1.0f,1.0f)),
	
			/*TVertex(D3DXVECTOR3(0.0f,size1,0.0f), ((DWORD)(0x40*rate1)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size1,0.0f,0.0f),((DWORD)(0x40*rate1)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size1,0.0f,0.0f), ((DWORD)(0x40*rate1)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size2,0.0f,0.0f),((DWORD)(0x40*rate2)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size2,0.0f,0.0f), ((DWORD)(0x40*rate2)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(0.0f,-size2,0.0f),((DWORD)(0x40*rate2)<<24) + 0x0000ff,D3DXVECTOR2(0.0f,0.0f)),*/

			/*TVertex(D3DXVECTOR3(0.0f,size1,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size1,0.0f,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size1,0.0f,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size2,0.0f,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size2,0.0f,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(0.0f,-size2,0.0f),0x20ff0000,D3DXVECTOR2(0.0f,0.0f)),*/

			/*TVertex(D3DXVECTOR3(0.0f,size1,0.0f),0xffff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size1,0.0f,0.0f),0xffff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size1,0.0f,0.0f),0xffff0000,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(-size2,0.0f,0.0f),0xff0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(size2,0.0f,0.0f),0xff0000ff,D3DXVECTOR2(0.0f,0.0f)),
			TVertex(D3DXVECTOR3(0.0f,-size2,0.0f),0xff0000ff,D3DXVECTOR2(0.0f,0.0f)),*/
		};


		D3DXVECTOR3 E(M._41,M._42,M._43);
		E = pCurrentCamera->GetEye();
		E-=it1->second;

		D3DXVECTOR3 P;
		D3DXVec3Cross(&P, &B,&E);

		D3DXVECTOR3 U;
		D3DXVec3Cross(&U,&F,&P);
		D3DXVec3Normalize(&U,&U);
		D3DXVECTOR3 R;
		D3DXVec3Cross(&R,&F,&U);
		//D3DXMatrixIdentity(&m);
		m._21 = U.x;
		m._22 = U.y;
		m._23 = U.z;
		m._11 = R.x;
		m._12 = R.y;
		m._13 = R.z;
		int i;
		for(i=0;i<6;i++)
			D3DXVec3TransformNormal(&v[i].p,&v[i].p,&m);
		for(i=0;i<3;i++)
			v[i].p += it1->second;
		for(;i<6;i++)
			v[i].p += it2->second;
		//for(i=0;i<6;i++)
		//	Tracenf("#%d:%f %f %f", i, v[i].p.x,v[i].p.y,v[i].p.z);
		
		VSVector.push_back(std::make_pair(-D3DXVec3Dot(&E,&pCurrentCamera->GetView()),TFlyVertexSet(v)));
		//OLD: STATEMANAGER.DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 4, v, sizeof(TVertex));
		//OLD: STATEMANAGER.DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 2, v+1, sizeof(TVertex));		
	}

	std::sort(VSVector.begin(),VSVector.end());

	for(TFlyVertexSetVector::iterator it = VSVector.begin();it!=VSVector.end();++it)
	{
		STATEMANAGER.DrawPrimitiveUP(D3DPT_TRIANGLESTRIP, 4, it->second.v, sizeof(TVertex));
	}
	STATEMANAGER.RestoreRenderState(D3DRS_DESTBLEND);
	STATEMANAGER.RestoreRenderState(D3DRS_SRCBLEND);
	STATEMANAGER.RestoreRenderState(D3DRS_ALPHABLENDENABLE);
	STATEMANAGER.RestoreRenderState(D3DRS_CULLMODE);
	STATEMANAGER.RestoreVertexShader();
	STATEMANAGER.RestoreTransform(D3DTS_WORLD);
	//STATEMANAGER.RestoreRenderState(D3DRS_ZWRITEENABLE);
	STATEMANAGER.RestoreRenderState(D3DRS_ZFUNC);
	STATEMANAGER.RestoreRenderState(D3DRS_BLENDOP);

	STATEMANAGER.RestoreRenderState(D3DRS_ALPHATESTENABLE);
	STATEMANAGER.RestoreRenderState(D3DRS_ALPHAFUNC);
	STATEMANAGER.RestoreRenderState(D3DRS_ALPHAREF);

}