/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------

Copyright (c) 2006-2008, ASSIMP Development Team

All rights reserved.

Redistribution and use of this software in source and binary forms, 
with or without modification, are permitted provided that the following 
conditions are met:

* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.

* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.

* Neither the name of the ASSIMP team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/


#include "stdafx.h"
#include "assimp_view.h"
#include <map>
using namespace std;

namespace AssimpView {


//-------------------------------------------------------------------------------
// evil globals
//-------------------------------------------------------------------------------
HINSTANCE g_hInstance				= NULL;
HWND g_hDlg							= NULL;
IDirect3D9* g_piD3D					= NULL;
IDirect3DDevice9* g_piDevice		= NULL;
double g_fFPS						= 0.0f;
char g_szFileName[MAX_PATH];
ID3DXEffect* g_piDefaultEffect		= NULL;
ID3DXEffect* g_piNormalsEffect		= NULL;
ID3DXEffect* g_piPassThroughEffect	= NULL;
ID3DXEffect* g_piPatternEffect		= NULL;
bool g_bMousePressed				= false;
bool g_bMousePressedR				= false;
bool g_bMousePressedM				= false;
bool g_bMousePressedBoth			= false;
float g_fElpasedTime				= 0.0f;
D3DCAPS9 g_sCaps;
bool g_bLoadingFinished				= false;
HANDLE g_hThreadHandle				= NULL;
float g_fWheelPos					= -10.0f;
bool g_bLoadingCanceled				= false;
IDirect3DTexture9* g_pcTexture		= NULL;

extern bool g_bWasFlipped			/*= false*/;

aiMatrix4x4 g_mWorld;
aiMatrix4x4 g_mWorldRotate;
aiVector3D g_vRotateSpeed			= aiVector3D(0.5f,0.5f,0.5f);

// NOTE: The second light direction is no computed from the first
aiVector3D g_avLightDirs[1] = 
{	aiVector3D(-0.5f,0.6f,0.2f)  };

extern D3DCOLOR g_avLightColors[3] = 
{
	D3DCOLOR_ARGB(0xFF,0xFF,0xFF,0xFF),
	D3DCOLOR_ARGB(0xFF,0xFF,0x00,0x00),
	D3DCOLOR_ARGB(0xFF,0x05,0x05,0x05),
};

POINT g_mousePos;
POINT g_LastmousePos;
bool g_bFPSView						= false;
bool g_bInvert						= false;
EClickPos g_eClick					= EClickPos_Circle;
unsigned int g_iCurrentColor		= 0;

float g_fLightIntensity				= 1.0f;
float g_fLightColor					= 1.0f;

RenderOptions g_sOptions;
Camera g_sCamera;
AssetHelper *g_pcAsset				= NULL;

//
// Contains the mask image for the HUD 
// (used to determine the position of a click)
//
unsigned char* g_szImageMask		= NULL;

float g_fLoadTime = 0.0f;


//-------------------------------------------------------------------------------
// Entry point for the loader thread
// The laoder thread loads the asset while the progress dialog displays the
// smart progress bar
//-------------------------------------------------------------------------------
DWORD WINAPI LoadThreadProc(LPVOID lpParameter)
{
	UNREFERENCED_PARAMETER(lpParameter);

	// get current time
	double fCur = (double)timeGetTime();

	// call ASSIMPs C-API to load the file
	g_pcAsset->pcScene = (aiScene*)aiImportFile(g_szFileName,
		aiProcess_CalcTangentSpace		| // calculate tangents and bitangents
		aiProcess_JoinIdenticalVertices | // join identical vertices
		aiProcess_Triangulate			| // triangulate n-polygons
		aiProcess_GenSmoothNormals		| // generate smooth normal vectors if not existing
		aiProcess_ConvertToLeftHanded	| // convert everything to D3D left handed space
		aiProcess_SplitLargeMeshes);      // split large, unrenderable meshes into submeshes

	// get the end time of zje operation, calculate delta t
	double fEnd = (double)timeGetTime();
	g_fLoadTime = (float)((fEnd - fCur) / 1000);
//	char szTemp[128];
	g_bLoadingFinished = true;

	// check whether the loading process has failed ...
	if (NULL == g_pcAsset->pcScene)
	{
		CLogDisplay::Instance().AddEntry("[ERROR] Unable to load this asset:",
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));

		// print ASSIMPs error string to the log display
		CLogDisplay::Instance().AddEntry(aiGetErrorString(),
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));
		return 1;
	}
	return 0;
}

//-------------------------------------------------------------------------------
// load the current asset
// THe path to the asset is specified in the global path variable
//-------------------------------------------------------------------------------
int LoadAsset(void)
{
	// set the world and world rotation matrices to the identuty
	g_mWorldRotate = aiMatrix4x4();
	g_mWorld = aiMatrix4x4();

	char szTemp[MAX_PATH+64];
	sprintf(szTemp,"Starting to load %s",g_szFileName);
	CLogWindow::Instance().WriteLine(
		"****************************************************************************");
	CLogWindow::Instance().WriteLine(szTemp);
	CLogWindow::Instance().WriteLine(
		"****************************************************************************");
	CLogWindow::Instance().SetAutoUpdate(false);

	// create a helper thread to load the asset
	DWORD dwID;
	g_bLoadingCanceled = false;
	g_pcAsset = new AssetHelper();
	g_hThreadHandle = CreateThread(NULL,0,&LoadThreadProc,NULL,0,&dwID);

	if (!g_hThreadHandle)
	{
		CLogDisplay::Instance().AddEntry(
			"[ERROR] Unable to create helper thread for loading",
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));
		return 0;
	}

	// show the progress bar dialog
	DialogBox(g_hInstance,MAKEINTRESOURCE(IDD_LOADDIALOG),
		g_hDlg,&ProgressMessageProc);

	// update the log window
	CLogWindow::Instance().SetAutoUpdate(true);
	CLogWindow::Instance().Update();

	// now we should have loaded the asset. Check this ...
	g_bLoadingFinished = false;
	if (!g_pcAsset || !g_pcAsset->pcScene)
	{
		if (g_pcAsset)
		{
			delete g_pcAsset;
			g_pcAsset = NULL;
		}
		return 0;
	}

	// allocate a new MeshHelper array and build a new instance
	// for each mesh in the original asset
	g_pcAsset->apcMeshes = new AssetHelper::MeshHelper*[g_pcAsset->pcScene->mNumMeshes]();
	for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
	{	
		g_pcAsset->apcMeshes[i] = new AssetHelper::MeshHelper();
	}

	// build a new caption string for the viewer
	char szOut[MAX_PATH + 10];
	sprintf(szOut,AI_VIEW_CAPTION_BASE " [%s]",g_szFileName);
	SetWindowText(g_hDlg,szOut);

	// scale the asset vertices to fit into the viewer window
	ScaleAsset();

	// reset the camera view to the default position
	g_sCamera.vPos = aiVector3D(0.0f,0.0f,-10.0f);
	g_sCamera.vLookAt = aiVector3D(0.0f,0.0f,1.0f);
	g_sCamera.vUp = aiVector3D(0.0f,1.0f,0.0f);
	g_sCamera.vRight = aiVector3D(0.0f,1.0f,0.0f);

	// build native D3D vertex/index buffers, textures, materials
	if( 1 != CreateAssetData())return 0;

	CLogDisplay::Instance().AddEntry("[OK] The asset has been loaded successfully");
	CDisplay::Instance().FillDisplayList();
	CDisplay::Instance().FillAnimList();

	CDisplay::Instance().FillDefaultStatistics();

	// just make sure the alpha blend ordering is done in the first frame
	CMeshRenderer::Instance().Reset();
	g_pcAsset->iNormalSet = AssetHelper::ORIGINAL;
	g_bWasFlipped = false;
	return 1;
}


//-------------------------------------------------------------------------------
// Delete the loaded asset
// The function does nothing is no asset is loaded
//-------------------------------------------------------------------------------
int DeleteAsset(void)
{
	if (!g_pcAsset)return 0;

	// don't anymore know why this was necessary ...
	CDisplay::Instance().OnRender();

	// delete everything
	DeleteAssetData();
	for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
	{
		delete g_pcAsset->apcMeshes[i];
	}
	aiReleaseImport(g_pcAsset->pcScene);
	delete[] g_pcAsset->apcMeshes;
	delete g_pcAsset;
	g_pcAsset = NULL;

	// clear all stats edit controls
	SetDlgItemText(g_hDlg,IDC_EVERT,"0");
	SetDlgItemText(g_hDlg,IDC_EFACE,"0");
	SetDlgItemText(g_hDlg,IDC_EMAT,"0");
	SetDlgItemText(g_hDlg,IDC_ENODE,"0");
	SetDlgItemText(g_hDlg,IDC_ESHADER,"0");
	SetDlgItemText(g_hDlg,IDC_ETEX,"0");

	// reset the caption of the viewer window
	SetWindowText(g_hDlg,AI_VIEW_CAPTION_BASE);

	// clear UI
	CDisplay::Instance().ClearAnimList();
	CDisplay::Instance().ClearDisplayList();

	CMaterialManager::Instance().Reset();
	return 1;
}


//-------------------------------------------------------------------------------
// Calculate the boundaries of a given node and all of its children
// The boundaries are in Worldspace (AABB)
// piNode Input node
// p_avOut Receives the min/max boundaries. Must point to 2 vec3s
// piMatrix Transformation matrix of the graph at this position
//-------------------------------------------------------------------------------
int CalculateBounds(aiNode* piNode, aiVector3D* p_avOut, 
	const aiMatrix4x4& piMatrix)
{
	ai_assert(NULL != piNode);
	ai_assert(NULL != p_avOut);

	aiMatrix4x4 mTemp = piNode->mTransformation;
	mTemp.Transpose();
	aiMatrix4x4 aiMe = mTemp * piMatrix;

	for (unsigned int i = 0; i < piNode->mNumMeshes;++i)
	{
		for( unsigned int a = 0; a < g_pcAsset->pcScene->mMeshes[
			piNode->mMeshes[i]]->mNumVertices;++a)
		{
			aiVector3D pc =g_pcAsset->pcScene->mMeshes[piNode->mMeshes[i]]->mVertices[a];

			aiVector3D pc1;
			D3DXVec3TransformCoord((D3DXVECTOR3*)&pc1,(D3DXVECTOR3*)&pc,
				(D3DXMATRIX*)&aiMe);

			p_avOut[0].x = std::min( p_avOut[0].x, pc1.x);
			p_avOut[0].y = std::min( p_avOut[0].y, pc1.y);
			p_avOut[0].z = std::min( p_avOut[0].z, pc1.z);
			p_avOut[1].x = std::max( p_avOut[1].x, pc1.x);
			p_avOut[1].y = std::max( p_avOut[1].y, pc1.y);
			p_avOut[1].z = std::max( p_avOut[1].z, pc1.z);
		}
	}
	for (unsigned int i = 0; i < piNode->mNumChildren;++i)
	{
		CalculateBounds( piNode->mChildren[i], p_avOut, aiMe );
	}
	return 1;
}
//-------------------------------------------------------------------------------
// Scale the asset that it fits perfectly into the viewer window
// The function calculates the boundaries of the mesh and modifies the
// global world transformation matrix according to the aset AABB
//-------------------------------------------------------------------------------
int ScaleAsset(void)
{
	aiVector3D aiVecs[2] = {aiVector3D( 1e10f, 1e10f, 1e10f),
		aiVector3D( -1e10f, -1e10f, -1e10f) };

	if (g_pcAsset->pcScene->mRootNode)
	{
		aiMatrix4x4 m;
		CalculateBounds(g_pcAsset->pcScene->mRootNode,aiVecs,m);
	}

	aiVector3D vDelta = aiVecs[1]-aiVecs[0];
	aiVector3D vHalf =  aiVecs[0] + (vDelta / 2.0f);
	float fScale = 10.0f / vDelta.Length();

	g_mWorld =  aiMatrix4x4(
		1.0f,0.0f,0.0f,0.0f,
		0.0f,1.0f,0.0f,0.0f,
		0.0f,0.0f,1.0f,0.0f,
		-vHalf.x,-vHalf.y,-vHalf.z,1.0f) *
		aiMatrix4x4(
		fScale,0.0f,0.0f,0.0f,
		0.0f,fScale,0.0f,0.0f,
		0.0f,0.0f,fScale,0.0f,
		0.0f,0.0f,0.0f,1.0f);
	return 1;
}

//-------------------------------------------------------------------------------
// Generate a vertex buffer which holds the normals of the asset as
// a list of unconnected lines
// pcMesh Input mesh
// pcSource Source mesh from ASSIMP
//-------------------------------------------------------------------------------
int GenerateNormalsAsLineList(AssetHelper::MeshHelper* pcMesh,const aiMesh* pcSource)
{
	ai_assert(NULL != pcMesh);
	ai_assert(NULL != pcSource);

	if (!pcSource->mNormals)return 0;

	// create vertex buffer
	if(FAILED( g_piDevice->CreateVertexBuffer(sizeof(AssetHelper::LineVertex) *
		pcSource->mNumVertices * 2,
		D3DUSAGE_WRITEONLY,
		AssetHelper::LineVertex::GetFVF(),
		D3DPOOL_DEFAULT, &pcMesh->piVBNormals,NULL)))
	{
		CLogDisplay::Instance().AddEntry("Failed to create vertex buffer for the normal list",
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));
		return 2;
	}

	// now fill the vertex buffer with data
	AssetHelper::LineVertex* pbData2;
	pcMesh->piVBNormals->Lock(0,0,(void**)&pbData2,0);
	for (unsigned int x = 0; x < pcSource->mNumVertices;++x)
	{
		pbData2->vPosition = pcSource->mVertices[x];

		++pbData2;

		aiVector3D vNormal = pcSource->mNormals[x];
		vNormal.Normalize();

		// scalo with the inverse of the world scaling to make sure
		// the normals have equal length in each case
		// TODO: Check whether this works in every case, I don't think so
		vNormal.x /= g_mWorld.a1*4;
		vNormal.y /= g_mWorld.b2*4;
		vNormal.z /= g_mWorld.c3*4;

		pbData2->vPosition = pcSource->mVertices[x] + vNormal;

		++pbData2;
	}
	pcMesh->piVBNormals->Unlock();
	return 1;
}

//-------------------------------------------------------------------------------
// Create the native D3D representation of the asset: vertex buffers,
// index buffers, materials ...
//-------------------------------------------------------------------------------
int CreateAssetData()
{
	if (!g_pcAsset)return 0;

	// reset all subsystems
	CMaterialManager::Instance().Reset();
	CMeshRenderer::Instance().Reset();
	CDisplay::Instance().Reset();

	for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
	{
		// create the material for the mesh
		if (!g_pcAsset->apcMeshes[i]->piEffect)
		{
			CMaterialManager::Instance().CreateMaterial(
				g_pcAsset->apcMeshes[i],g_pcAsset->pcScene->mMeshes[i]);
		}

		// create vertex buffer
		if(FAILED( g_piDevice->CreateVertexBuffer(sizeof(AssetHelper::Vertex) *
			g_pcAsset->pcScene->mMeshes[i]->mNumVertices,
			D3DUSAGE_WRITEONLY,
			AssetHelper::Vertex::GetFVF(),
			D3DPOOL_DEFAULT, &g_pcAsset->apcMeshes[i]->piVB,NULL)))
		{
			MessageBox(g_hDlg,"Failed to create vertex buffer",
				"ASSIMP Viewer Utility",MB_OK);
			return 2;
		}

		DWORD dwUsage = 0;
		if (g_pcAsset->apcMeshes[i]->piOpacityTexture || 1.0f != g_pcAsset->apcMeshes[i]->fOpacity)
			dwUsage |= D3DUSAGE_DYNAMIC;

		// check whether we can use 16 bit indices
		if (g_pcAsset->pcScene->mMeshes[i]->mNumFaces * 3 >= 65536)
		{
			// create 32 bit index buffer
			if(FAILED( g_piDevice->CreateIndexBuffer( 4 *
				g_pcAsset->pcScene->mMeshes[i]->mNumFaces * 3,
				D3DUSAGE_WRITEONLY | dwUsage,
				D3DFMT_INDEX32,
				D3DPOOL_DEFAULT, 
				&g_pcAsset->apcMeshes[i]->piIB,
				NULL)))
			{
				MessageBox(g_hDlg,"Failed to create 32 Bit index buffer",
					"ASSIMP Viewer Utility",MB_OK);
				return 2;
			}

			// now fill the index buffer
			unsigned int* pbData;
			g_pcAsset->apcMeshes[i]->piIB->Lock(0,0,(void**)&pbData,0);
			for (unsigned int x = 0; x < g_pcAsset->pcScene->mMeshes[i]->mNumFaces;++x)
			{
				for (unsigned int a = 0; a < 3;++a)
				{
					*pbData++ = g_pcAsset->pcScene->mMeshes[i]->mFaces[x].mIndices[a];
				}
			}
		}
		else
		{
			// create 16 bit index buffer
			if(FAILED( g_piDevice->CreateIndexBuffer( 2 *
				g_pcAsset->pcScene->mMeshes[i]->mNumFaces * 3,
				D3DUSAGE_WRITEONLY | dwUsage,
				D3DFMT_INDEX16,
				D3DPOOL_DEFAULT,
				&g_pcAsset->apcMeshes[i]->piIB,
				NULL)))
			{
				MessageBox(g_hDlg,"Failed to create 16 Bit index buffer",
					"ASSIMP Viewer Utility",MB_OK);
				return 2;
			}

			// now fill the index buffer
			uint16_t* pbData;
			g_pcAsset->apcMeshes[i]->piIB->Lock(0,0,(void**)&pbData,0);
			for (unsigned int x = 0; x < g_pcAsset->pcScene->mMeshes[i]->mNumFaces;++x)
			{
				for (unsigned int a = 0; a < 3;++a)
				{
					*pbData++ = (uint16_t)g_pcAsset->pcScene->mMeshes[i]->mFaces[x].mIndices[a];
				}
			}
		}
		g_pcAsset->apcMeshes[i]->piIB->Unlock();

		// now fill the vertex buffer
		AssetHelper::Vertex* pbData2;
		g_pcAsset->apcMeshes[i]->piVB->Lock(0,0,(void**)&pbData2,0);
		for (unsigned int x = 0; x < g_pcAsset->pcScene->mMeshes[i]->mNumVertices;++x)
		{
			pbData2->vPosition = g_pcAsset->pcScene->mMeshes[i]->mVertices[x];

			if (NULL == g_pcAsset->pcScene->mMeshes[i]->mNormals)
				pbData2->vNormal = aiVector3D(0.0f,0.0f,0.0f);
			else pbData2->vNormal = g_pcAsset->pcScene->mMeshes[i]->mNormals[x];

			if (NULL == g_pcAsset->pcScene->mMeshes[i]->mTangents)
			{
				pbData2->vTangent = aiVector3D(0.0f,0.0f,0.0f);
				pbData2->vBitangent = aiVector3D(0.0f,0.0f,0.0f);
			}
			else 
			{
				pbData2->vTangent = g_pcAsset->pcScene->mMeshes[i]->mTangents[x];
				pbData2->vBitangent = g_pcAsset->pcScene->mMeshes[i]->mBitangents[x];
			}

			if (g_pcAsset->pcScene->mMeshes[i]->HasVertexColors( 0))
			{
				pbData2->dColorDiffuse = D3DCOLOR_ARGB(
					((unsigned char)std::max( std::min( g_pcAsset->pcScene->mMeshes[i]->mColors[0][x].a * 255.0f, 255.0f),0.0f)),
					((unsigned char)std::max( std::min( g_pcAsset->pcScene->mMeshes[i]->mColors[0][x].r * 255.0f, 255.0f),0.0f)),
					((unsigned char)std::max( std::min( g_pcAsset->pcScene->mMeshes[i]->mColors[0][x].g * 255.0f, 255.0f),0.0f)),
					((unsigned char)std::max( std::min( g_pcAsset->pcScene->mMeshes[i]->mColors[0][x].b * 255.0f, 255.0f),0.0f)));
			}
			else pbData2->dColorDiffuse = D3DCOLOR_ARGB(0xFF,0,0,0);

			// ignore a third texture coordinate component
			if (g_pcAsset->pcScene->mMeshes[i]->HasTextureCoords( 0))
			{
				pbData2->vTextureUV = aiVector2D(
					g_pcAsset->pcScene->mMeshes[i]->mTextureCoords[0][x].x,
					g_pcAsset->pcScene->mMeshes[i]->mTextureCoords[0][x].y);
			}
			else pbData2->vTextureUV = aiVector2D(0.0f,0.0f);
			++pbData2;
		}
		g_pcAsset->apcMeshes[i]->piVB->Unlock();

		// now generate the second vertex buffer, holding all normals
		if (!g_pcAsset->apcMeshes[i]->piVBNormals)
		{
			GenerateNormalsAsLineList(g_pcAsset->apcMeshes[i],g_pcAsset->pcScene->mMeshes[i]);
		}
	}
	return 1;
}

//-------------------------------------------------------------------------------
// Delete all effects, textures, vertex buffers ... associated with
// an asset
//-------------------------------------------------------------------------------
int DeleteAssetData(bool bNoMaterials)
{
	if (!g_pcAsset)return 0;

	// TODO: Move this to a proper destructor
	for (unsigned int i = 0; i < g_pcAsset->pcScene->mNumMeshes;++i)
	{
		if(g_pcAsset->apcMeshes[i]->piVB)
		{
			g_pcAsset->apcMeshes[i]->piVB->Release();
			g_pcAsset->apcMeshes[i]->piVB = NULL;
		}
		if(g_pcAsset->apcMeshes[i]->piVBNormals)
		{
			g_pcAsset->apcMeshes[i]->piVBNormals->Release();
			g_pcAsset->apcMeshes[i]->piVBNormals = NULL;
		}
		if(g_pcAsset->apcMeshes[i]->piIB)
		{
			g_pcAsset->apcMeshes[i]->piIB->Release();
			g_pcAsset->apcMeshes[i]->piIB = NULL;
		}

		//// delete storage eventually allocated to hold a copy
		//// of the original vertex normals
		//if (AssetHelper::ORIGINAL != g_pcAsset->iNormalSet)
		//{
		//	delete[] g_pcAsset->apcMeshes[i]->pvOriginalNormals;
		//}

		if (!bNoMaterials)
		{
			if(g_pcAsset->apcMeshes[i]->piEffect)
			{
				g_pcAsset->apcMeshes[i]->piEffect->Release();
				g_pcAsset->apcMeshes[i]->piEffect = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piDiffuseTexture)
			{
				g_pcAsset->apcMeshes[i]->piDiffuseTexture->Release();
				g_pcAsset->apcMeshes[i]->piDiffuseTexture = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piNormalTexture)
			{
				g_pcAsset->apcMeshes[i]->piNormalTexture->Release();
				g_pcAsset->apcMeshes[i]->piNormalTexture = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piSpecularTexture)
			{
				g_pcAsset->apcMeshes[i]->piSpecularTexture->Release();
				g_pcAsset->apcMeshes[i]->piSpecularTexture = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piAmbientTexture)
			{
				g_pcAsset->apcMeshes[i]->piAmbientTexture->Release();
				g_pcAsset->apcMeshes[i]->piAmbientTexture = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piEmissiveTexture)
			{
				g_pcAsset->apcMeshes[i]->piEmissiveTexture->Release();
				g_pcAsset->apcMeshes[i]->piEmissiveTexture = NULL;
			}
			if(g_pcAsset->apcMeshes[i]->piShininessTexture)
			{
				g_pcAsset->apcMeshes[i]->piShininessTexture->Release();
				g_pcAsset->apcMeshes[i]->piShininessTexture = NULL;
			}
		}
	}
	return 1;
}


//-------------------------------------------------------------------------------
// Switch beetween zoom/rotate view and the standatd FPS view
// g_bFPSView specifies the view mode to setup
//-------------------------------------------------------------------------------
int SetupFPSView()
{
	if (!g_bFPSView)
	{
		g_sCamera.vPos = aiVector3D(0.0f,0.0f,g_fWheelPos);
		g_sCamera.vLookAt = aiVector3D(0.0f,0.0f,1.0f);
		g_sCamera.vUp = aiVector3D(0.0f,1.0f,0.0f);
		g_sCamera.vRight = aiVector3D(0.0f,1.0f,0.0f);
	}
	else
	{
		g_fWheelPos = g_sCamera.vPos.z;
		g_sCamera.vPos = aiVector3D(0.0f,0.0f,-10.0f);
		g_sCamera.vLookAt = aiVector3D(0.0f,0.0f,1.0f);
		g_sCamera.vUp = aiVector3D(0.0f,1.0f,0.0f);
		g_sCamera.vRight = aiVector3D(0.0f,1.0f,0.0f);
	}
	return 1;
}

//-------------------------------------------------------------------------------
// Initialize the IDIrect3D interface
// Called by the WinMain
//-------------------------------------------------------------------------------
int InitD3D(void)
{
	if (NULL == g_piD3D)
	{
		g_piD3D = Direct3DCreate9(D3D_SDK_VERSION);
		if (NULL == g_piD3D)return 0;
	}
	return 1;
}


//-------------------------------------------------------------------------------
// Release the IDirect3D interface.
// NOTE: Assumes that the device has already been deleted
//-------------------------------------------------------------------------------
int ShutdownD3D(void)
{
	ShutdownDevice();
	if (NULL != g_piD3D)
	{
		g_piD3D->Release();
		g_piD3D = NULL;
	}
	return 1;
}


//-------------------------------------------------------------------------------
// Shutdown the D3D devie object and all resources associated with it
// NOTE: Assumes that the asset has already been deleted
//-------------------------------------------------------------------------------
int ShutdownDevice(void)
{
	// release other subsystems
	CBackgroundPainter::Instance().ReleaseNativeResource();
	CLogDisplay::Instance().ReleaseNativeResource();

	// release global shaders that have been allocazed
	if (NULL != g_piDefaultEffect)
	{
		g_piDefaultEffect->Release();
		g_piDefaultEffect = NULL;
	}
	if (NULL != g_piNormalsEffect)
	{
		g_piNormalsEffect->Release();
		g_piNormalsEffect = NULL;
	}
	if (NULL != g_piPassThroughEffect)
	{
		g_piPassThroughEffect->Release();
		g_piPassThroughEffect = NULL;
	}
	if (NULL != g_piPatternEffect)
	{
		g_piPatternEffect->Release();
		g_piPatternEffect = NULL;
	}
	if (NULL != g_pcTexture)
	{
		g_pcTexture->Release();
		g_pcTexture = NULL;
	}

	// delete the main D3D device object
	if (NULL != g_piDevice)
	{
		g_piDevice->Release();
		g_piDevice = NULL;
	}

	// deleted the one channel image allocated to hold the HUD mask
	delete[] g_szImageMask;
	g_szImageMask = NULL;

	return 1;
}


//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
int CreateHUDTexture()
{
	// lock the memory resource ourselves
	HRSRC res = FindResource(NULL,MAKEINTRESOURCE(IDR_HUD),RT_RCDATA);
	HGLOBAL hg = LoadResource(NULL,res);
	void* pData = LockResource(hg);

	if(FAILED(D3DXCreateTextureFromFileInMemoryEx(g_piDevice,
		pData,SizeofResource(NULL,res),
		D3DX_DEFAULT_NONPOW2,
		D3DX_DEFAULT_NONPOW2,
		1,
		0,
		D3DFMT_A8R8G8B8,
		D3DPOOL_MANAGED,
		D3DX_DEFAULT,
		D3DX_DEFAULT,
		0,
		NULL,
		NULL,
		&g_pcTexture)))
	{
		CLogDisplay::Instance().AddEntry("[ERROR] Unable to load HUD texture",
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));

		g_pcTexture  = NULL;
		g_szImageMask = NULL;

		UnlockResource(hg);
		FreeResource(hg);
		return 0;
	}

	UnlockResource(hg);
	FreeResource(hg);

	D3DSURFACE_DESC sDesc;
	g_pcTexture->GetLevelDesc(0,&sDesc);


	// lock the memory resource ourselves
	res = FindResource(NULL,MAKEINTRESOURCE(IDR_HUDMASK),RT_RCDATA);
	hg = LoadResource(NULL,res);
	pData = LockResource(hg);

	IDirect3DTexture9* pcTex;
	if(FAILED(D3DXCreateTextureFromFileInMemoryEx(g_piDevice,
		pData,SizeofResource(NULL,res),
		sDesc.Width,
		sDesc.Height,
		1,
		0,
		D3DFMT_L8,
		D3DPOOL_MANAGED, // unnecessary
		D3DX_DEFAULT,
		D3DX_DEFAULT,
		0,
		NULL,
		NULL,
		&pcTex)))
	{
		CLogDisplay::Instance().AddEntry("[ERROR] Unable to load HUD mask texture",
			D3DCOLOR_ARGB(0xFF,0xFF,0,0));
		g_szImageMask = NULL;

		UnlockResource(hg);
		FreeResource(hg);
		return 0;
	}

	UnlockResource(hg);
	FreeResource(hg);

	// lock the texture and copy it to get a pointer
	D3DLOCKED_RECT sRect;
	pcTex->LockRect(0,&sRect,NULL,D3DLOCK_READONLY);

	unsigned char* szOut = new unsigned char[sDesc.Width * sDesc.Height];
	unsigned char* _szOut = szOut;

	unsigned char* szCur = (unsigned char*) sRect.pBits;
	for (unsigned int y = 0; y < sDesc.Height;++y)
	{
		memcpy(_szOut,szCur,sDesc.Width);

		szCur += sRect.Pitch;
		_szOut += sDesc.Width;
	}
	pcTex->UnlockRect(0);
	pcTex->Release();

	g_szImageMask = szOut;
	return 1;
}

//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
int CreateDevice (bool p_bMultiSample,bool p_bSuperSample,bool bHW /*= true*/)
{
	D3DDEVTYPE eType = bHW ? D3DDEVTYPE_HAL : D3DDEVTYPE_REF;

	// get the client rectangle of the window.
	RECT sRect;
	GetWindowRect(GetDlgItem(g_hDlg,IDC_RT),&sRect);
	sRect.right -= sRect.left;
	sRect.bottom -= sRect.top;

	D3DPRESENT_PARAMETERS sParams;
	memset(&sParams,0,sizeof(D3DPRESENT_PARAMETERS));

	// get the current display mode
	D3DDISPLAYMODE sMode;
	g_piD3D->GetAdapterDisplayMode(0,&sMode);

	// fill the presentation parameter structure
	sParams.Windowed				= TRUE;
	sParams.hDeviceWindow			= GetDlgItem( g_hDlg, IDC_RT );
	sParams.EnableAutoDepthStencil	= TRUE;
	sParams.PresentationInterval	= D3DPRESENT_INTERVAL_ONE;
	sParams.BackBufferWidth			= (UINT)sRect.right;
	sParams.BackBufferHeight		= (UINT)sRect.bottom;
	sParams.SwapEffect				= D3DSWAPEFFECT_DISCARD;

	// check whether we can use a D32 depth buffer format
	if (SUCCEEDED ( g_piD3D->CheckDepthStencilMatch(0,eType,
		D3DFMT_X8R8G8B8,D3DFMT_X8R8G8B8,D3DFMT_D32)))
	{
		sParams.AutoDepthStencilFormat = D3DFMT_D32;
	}
	else sParams.AutoDepthStencilFormat = D3DFMT_D24X8;

	// find the highest multisample type available on this device
	D3DMULTISAMPLE_TYPE sMS = D3DMULTISAMPLE_2_SAMPLES;
	D3DMULTISAMPLE_TYPE sMSOut = D3DMULTISAMPLE_NONE;
	DWORD dwQuality = 0;
	if (p_bMultiSample)
	{
		while ((D3DMULTISAMPLE_TYPE)(D3DMULTISAMPLE_16_SAMPLES + 1)  != 
			(sMS = (D3DMULTISAMPLE_TYPE)(sMS + 1)))
		{
			if(SUCCEEDED( g_piD3D->CheckDeviceMultiSampleType(0,eType,
				sMode.Format,TRUE,sMS,&dwQuality)))
			{
				sMSOut = sMS;
			}
		}
		if (0 != dwQuality)dwQuality -= 1;


		sParams.MultiSampleQuality = dwQuality;
		sParams.MultiSampleType = sMSOut;
	}

	// create the D3D9 device object
	if(FAILED(g_piD3D->CreateDevice(0,eType,
		g_hDlg,D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED,&sParams,&g_piDevice)))
	{
		if(FAILED(g_piD3D->CreateDevice(0,eType,
			g_hDlg,D3DCREATE_SOFTWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED,&sParams,&g_piDevice)))
		{
			// if hardware fails use software rendering instead
			if (bHW)return CreateDevice(p_bMultiSample,p_bSuperSample,false);
			return 0;
		}
	}
	g_piDevice->SetFVF(AssetHelper::Vertex::GetFVF());

	// compile the default material shader (gray gouraud/phong)
	ID3DXBuffer* piBuffer = NULL;
	if(FAILED( D3DXCreateEffect(g_piDevice,
		g_szDefaultShader.c_str(),
		(UINT)g_szDefaultShader.length(),
		NULL,
		NULL,
		D3DXSHADER_USE_LEGACY_D3DX9_31_DLL,
		NULL,
		&g_piDefaultEffect,&piBuffer)))
	{
		if( piBuffer) 
		{
			MessageBox(g_hDlg,(LPCSTR)piBuffer->GetBufferPointer(),"HLSL",MB_OK);
			piBuffer->Release();
		}
		return 0;
	}
	if( piBuffer) 
	{
		piBuffer->Release();
		piBuffer = NULL;
	}

	// create the shader used to draw the HUD
	if(FAILED( D3DXCreateEffect(g_piDevice,
		g_szPassThroughShader.c_str(),(UINT)g_szPassThroughShader.length(),
		NULL,NULL,D3DXSHADER_USE_LEGACY_D3DX9_31_DLL,NULL,&g_piPassThroughEffect,&piBuffer)))
	{
		if( piBuffer) 
		{
			MessageBox(g_hDlg,(LPCSTR
				)piBuffer->GetBufferPointer(),"HLSL",MB_OK);
			piBuffer->Release();
		}
		return 0;
	}
	if( piBuffer) 
	{
		piBuffer->Release();
		piBuffer = NULL;
	}

	// create the shader used to visualize normal vectors
	if(FAILED( D3DXCreateEffect(g_piDevice,
		g_szNormalsShader.c_str(),(UINT)g_szNormalsShader.length(),
		NULL,NULL,D3DXSHADER_USE_LEGACY_D3DX9_31_DLL,NULL,&g_piNormalsEffect, &piBuffer)))
	{
		if( piBuffer) 
		{
			MessageBox(g_hDlg,(LPCSTR
				)piBuffer->GetBufferPointer(),"HLSL",MB_OK);
			piBuffer->Release();
		}
		return 0;
	}
	if( piBuffer) 
	{
		piBuffer->Release();
		piBuffer = NULL;
	}

	// get the capabilities of the device object
	g_piDevice->GetDeviceCaps(&g_sCaps);
	if(g_sCaps.PixelShaderVersion < D3DPS_VERSION(3,0))
	{
		EnableWindow(GetDlgItem(g_hDlg,IDC_LOWQUALITY),FALSE);
	}

	// create the texture for the HUD
	CreateHUDTexture();
	CBackgroundPainter::Instance().RecreateNativeResource();
	CLogDisplay::Instance().RecreateNativeResource();

	g_piPassThroughEffect->SetTexture("TEXTURE_2D",g_pcTexture);
	return 1;
}


//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
int CreateDevice (void)
{
	return CreateDevice(g_sOptions.bMultiSample,
		g_sOptions.bSuperSample);
}


//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
int GetProjectionMatrix (aiMatrix4x4& p_mOut)
{
	const float fFarPlane = 100.0f;
	const float fNearPlane = 0.1f;
	const float fFOV = (float)(45.0 * 0.0174532925);

	const float s = 1.0f / tanf(fFOV * 0.5f);
	const float Q = fFarPlane / (fFarPlane - fNearPlane);

	RECT sRect;
	GetWindowRect(GetDlgItem(g_hDlg,IDC_RT),&sRect);
	sRect.right -= sRect.left;
	sRect.bottom -= sRect.top;
	const float fAspect = (float)sRect.right / (float)sRect.bottom;

	p_mOut = aiMatrix4x4(
		s / fAspect, 0.0f, 0.0f, 0.0f,
		0.0f, s, 0.0f, 0.0f,
		0.0f, 0.0f, Q, 1.0f,
		0.0f, 0.0f, -Q * fNearPlane, 0.0f);
	return 1;
}


//-------------------------------------------------------------------------------
//-------------------------------------------------------------------------------
aiVector3D GetCameraMatrix (aiMatrix4x4& p_mOut)
{
	D3DXMATRIX view;
	D3DXMatrixIdentity( &view );

	D3DXVec3Normalize( (D3DXVECTOR3*)&g_sCamera.vLookAt, (D3DXVECTOR3*)&g_sCamera.vLookAt );
	D3DXVec3Cross( (D3DXVECTOR3*)&g_sCamera.vRight, (D3DXVECTOR3*)&g_sCamera.vUp, (D3DXVECTOR3*)&g_sCamera.vLookAt );
	D3DXVec3Normalize( (D3DXVECTOR3*)&g_sCamera.vRight, (D3DXVECTOR3*)&g_sCamera.vRight );
	D3DXVec3Cross( (D3DXVECTOR3*)&g_sCamera.vUp, (D3DXVECTOR3*)&g_sCamera.vLookAt, (D3DXVECTOR3*)&g_sCamera.vRight );
	D3DXVec3Normalize( (D3DXVECTOR3*)&g_sCamera.vUp, (D3DXVECTOR3*)&g_sCamera.vUp );

	view._11 = g_sCamera.vRight.x;
	view._12 = g_sCamera.vUp.x;
	view._13 = g_sCamera.vLookAt.x;
	view._14 = 0.0f;

	view._21 = g_sCamera.vRight.y;
	view._22 = g_sCamera.vUp.y;
	view._23 = g_sCamera.vLookAt.y;
	view._24 = 0.0f;

	view._31 = g_sCamera.vRight.z;
	view._32 = g_sCamera.vUp.z;
	view._33 = g_sCamera.vLookAt.z;
	view._34 = 0.0f;

	view._41 = -D3DXVec3Dot( (D3DXVECTOR3*)&g_sCamera.vPos, (D3DXVECTOR3*)&g_sCamera.vRight );
	view._42 = -D3DXVec3Dot( (D3DXVECTOR3*)&g_sCamera.vPos, (D3DXVECTOR3*)&g_sCamera.vUp );
	view._43 = -D3DXVec3Dot( (D3DXVECTOR3*)&g_sCamera.vPos, (D3DXVECTOR3*)&g_sCamera.vLookAt );
	view._44 =  1.0f;

	memcpy(&p_mOut,&view,sizeof(aiMatrix4x4));

	return g_sCamera.vPos;
}

};