/*
 *		This Code Was Created By Jeff Molofee 2000
 *		A HUGE Thanks To Fredric Echols For Cleaning Up
 *		And Optimizing This Code, Making It More Flexible!
 *		If You've Found This Code Useful, Please Let Me Know.
 *		Visit My Site At nehe.gamedev.net
 */

#include <windows.h>		// Header File For Windows
#include <gl\gl.h>			// Header File For The OpenGL32 Library
#include <gl\glu.h>			// Header File For The GLu32 Library
#include <gl\glaux.h>		// Header File For The Glaux Library
#include <vector>
#include <math.h>

HDC			hDC=NULL;		// Private GDI Device Context
HGLRC		hRC=NULL;		// Permanent Rendering Context
HWND		hWnd=NULL;		// Holds Our Window Handle
HINSTANCE	hInstance;		// Holds The Instance Of The Application

bool	keys[256];			// Array Used For The Keyboard Routine
bool	active=TRUE;		// Window Active Flag Set To TRUE By Default
bool	fullscreen=TRUE;	// Fullscreen Flag Set To Fullscreen Mode By Default

GLfloat rotY = 0;

LRESULT	CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);	// Declaration For WndProc

using namespace std;

class vector3
{
	public:
		vector3() : x( 0.0f ), y( 0.0f ), z( 0.0f ) {};
		vector3( float a_X, float a_Y, float a_Z ) : x( a_X ), y( a_Y ), z( a_Z ) {};
		vector3( const vector3 &v ) : x( v.x ), y( v.y ), z( v.z ) {};

		inline void Set( float a_X, float a_Y, float a_Z ) { x = a_X; y = a_Y; z = a_Z; }
		inline void Normalize() { float l = 1.0f / Length(); x *= l; y *= l; z *= l; }
		inline void Invert(){x*=-1;y*=-1;z*=-1;}

		inline bool IsZeroLength()				const { double d = x*x + y*y + z*z; return(d < (1e-06 * 1e-06));}
		inline float Dot(const vector3& a_V )	const { return x * a_V.x + y * a_V.y + z * a_V.z; }
		inline vector3 Cross( vector3 b )		const { return vector3( y * b.z - z * b.y, z * b.x - x * b.z, x * b.y - y * b.x ); }
		inline float Length()					const { return (float)sqrt( x * x + y * y + z * z ); }
		inline float SqrLength()					const { return x * x + y * y + z * z; }
		inline float Dist(const vector3 &a) const {
			float tmpX = (a.x - x) * (a.x - x);
			float tmpY = (a.y - y) * (a.y - y);
			float tmpZ = (a.z - z) * (a.z - z); 
			return sqrt(tmpX+tmpY+tmpZ);
		}
		inline float operator[](const int i) const { 
			return *(&x+i);
		}
		inline float& operator[](const int i)  { 
			return *(&x+i);
		}
		inline void operator += ( vector3& a_V ) { x += a_V.x; y += a_V.y; z += a_V.z; }
		inline void operator += ( int &val ) { x += val; y += val; z += val; }
		inline void operator += ( vector3* a_V ) { x += a_V->x; y += a_V->y; z += a_V->z; }
		inline void operator -= ( vector3& a_V ) { x -= a_V.x; y -= a_V.y; z -= a_V.z; }
		inline void operator -= ( vector3* a_V ) { x -= a_V->x; y -= a_V->y; z -= a_V->z; }
		inline void operator *= ( float f ) { x *= f; y *= f; z *= f; }
		inline void operator /= ( float f ) { x /= f; y /= f; z /= f; }
		inline void operator /= ( vector3& a_V ) { x /= a_V.x; y /= a_V.y; z /= a_V.z; }
		inline void operator *= ( vector3& a_V ) { x *= a_V.x; y *= a_V.y; z *= a_V.z; }
		inline void operator *= ( vector3* a_V ) { x *= a_V->x; y *= a_V->y; z *= a_V->z; }
		inline void operator = (const vector3 *a_v) {x = a_v->x; y = a_v->y; z = a_v->z;}
		inline bool operator ==(const vector3 &v)const {return (v.x == x && v.y == y && v.z == z);}
		inline bool operator !=(const vector3 &v)const {return !(v.x == x && v.y == y && v.z == z);}

		inline vector3 operator- () const { return vector3( -x, -y, -z ); }
		inline friend vector3 operator + ( const vector3& v1, const vector3& v2 ) { return vector3( v1.x + v2.x, v1.y + v2.y, v1.z + v2.z ); }
		inline friend vector3 operator - ( const vector3& v1, const vector3& v2 ) { return vector3( v1.x - v2.x, v1.y - v2.y, v1.z - v2.z ); }
		inline friend vector3 operator + ( const vector3& v1, vector3* v2 ) { return vector3( v1.x + v2->x, v1.y + v2->y, v1.z + v2->z ); }
		inline friend vector3 operator - ( const vector3& v1, vector3* v2 ) { return vector3( v1.x - v2->x, v1.y - v2->y, v1.z - v2->z ); }
		inline friend vector3 operator * ( const vector3& v, float f ) { return vector3( v.x * f, v.y * f, v.z * f ); }
		inline friend vector3 operator * ( const vector3& v1, vector3& v2 ) { return vector3( v1.x * v2.x, v1.y * v2.y, v1.z * v2.z ); }
		inline friend vector3 operator * ( float f, const vector3& v ) { return vector3( v.x * f, v.y * f, v.z * f ); }
		inline friend vector3 operator / ( float f, const vector3& v ) { return vector3( v.x / f, v.y / f, v.z / f ); }
		inline friend vector3 operator / ( const vector3& v,float f ) { return vector3( v.x / f, v.y / f, v.z / f ); }
		inline friend vector3 operator / ( const vector3& v1, const vector3& v2) { return vector3( v1.x / v2.x, v1.y / v2.y, v1.z / v2.z ); }
		
		static vector3 vector3::Max(const vector3 &a, const vector3 &b) {
			vector3 max;
			if(a.x > b.x)max.x = a.x;
			else max.x = b.x;
			
			if(a.y > b.y)max.y = a.y;
			else max.y = b.y;
			
			if(a.z > b.z)max.z = a.z;
			else max.z = b.z;

			return max;
		}
		static vector3 vector3::Min(const vector3 &a, const vector3 &b) {
			vector3 min;
			if(a.x < b.x)min.x = a.x;
			else min.x = b.x;
			
			if(a.y < b.y)min.y = a.y;
			else min.y = b.y;
			
			if(a.z < b.z)min.z = a.z;
			else min.z = b.z;

			return min;
		}

		std::string toString(){
			char buffer[256];
			sprintf(buffer,"%f, %f, %f",x,y,z);
			return buffer;
		}
		union
		{
			struct { float x, y, z; };
			struct { float cell[3]; };
		};
};

std::vector<vector3> pointList;
std::vector<vector3> lineList;
vector3 trans(0,0,-10),minPt,maxPt;

double catmullrom(double t, double p0,double p1,double p2,double p3){
	double t2 = t*t;
	double t3 = t2 * t;
	return (0.5 *(    	(2 * p1) + (-p0 + p2) * t +(2*p0 - 5*p1 + 4*p2 - p3) * t2 +(-p0 + 3*p1- 3*p2 + p3) * t3));
}
void FillPointVector(){
	pointList.push_back(vector3(-500,700,10));
	pointList.push_back(vector3(-300,12,10));
	pointList.push_back(vector3(-300,12,10));
	pointList.push_back(vector3(-100,12,10));
	pointList.push_back(vector3(-50,45,0));
	pointList.push_back(vector3(0,0,20));
	pointList.push_back(vector3(50,0,15));
	pointList.push_back(vector3(200,350,30));
	pointList.push_back(vector3(350,0,20));
	pointList.push_back(vector3(356,35,60));
	pointList.push_back(vector3(400,67,15));
	pointList.push_back(vector3(424,122,0));
	pointList.push_back(vector3(450,1,0));
	pointList.push_back(vector3(500,0,0));
}

void BuildPath(){
	FillPointVector();

	printf("Point vector filled: %d\n",pointList.size());
	float granularity = 0.1f;
	printf("Filled line list...");


	for(int c = 0; c < pointList.size()-3; c++){
		vector3 p0,p1,p2,p3;
		p0 = pointList[c];
		p1 = pointList[c+1];
		p2 = pointList[c+2];
		p3 = pointList[c+3];
		for(float i = 0; i <= 1; i+=granularity){
			vector3 pt;
			pt.x = catmullrom(i,p0.x,p1.x,p2.x,p3.x);
			pt.y = catmullrom(i,p0.y,p1.y,p2.y,p3.y);
			pt.z = catmullrom(i,p0.z,p1.z,p2.z,p3.z);

			if(i==0){
				minPt = maxPt = pt;
			} else {
				minPt = vector3::Min(minPt,pt);
				maxPt = vector3::Max(maxPt,pt);
			}

			lineList.push_back(pt);
		}
		printf(".");
	}
	printf("Complete[%d]\n",lineList.size());

	printf("Sample: %f %f %f\n",lineList[0].x,lineList[0].y,lineList[0].z);
	if(lineList.size() % 2 != 1 && lineList.size() != 0)lineList.pop_back();
}



GLvoid ReSizeGLScene(GLsizei width, GLsizei height)		// Resize And Initialize The GL Window
{
	if (height==0)										// Prevent A Divide By Zero By
	{
		height=1;										// Making Height Equal One
	}

	glViewport(0,0,width,height);						// Reset The Current Viewport

	glMatrixMode(GL_PROJECTION);						// Select The Projection Matrix
	glLoadIdentity();									// Reset The Projection Matrix

	// Calculate The Aspect Ratio Of The Window
	gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.01f,1000.0f);

	glMatrixMode(GL_MODELVIEW);							// Select The Modelview Matrix
	glLoadIdentity();									// Reset The Modelview Matrix
}

int InitGL(GLvoid)										// All Setup For OpenGL Goes Here
{
	BuildPath();

	glClearColor (0.0, 0.0, 0.0, 0.0);
	glClearDepth(1.0f);	
	glShadeModel (GL_SMOOTH);

	glEnable(GL_DEPTH_TEST);
	glDepthFunc(GL_LEQUAL);

	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
	return TRUE;										// Initialization Went OK
}

int DrawGLScene(GLvoid)									// Here's Where We Do All The Drawing
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear Screen And Depth Buffer
	glLoadIdentity();									// Reset The Current Modelview Matrix
	glTranslatef(trans.x,trans.y,trans.z);
	glRotatef(rotY,0,1,0);

	glColor3f(1,0,0);
	if(lineList.size()>=2)
		for(int i = 0; i < lineList.size()-1; i++){
			//vector3 pt1 = (lineList[i] - minPt)		/(maxPt-minPt);
			//vector3 pt2 = (lineList[i+1] - minPt)	/(maxPt-minPt);
			vector3 pt1 = lineList[i]/100.f;
			vector3 pt2 = lineList[i+1]/100.f;
			glBegin(GL_LINES);
				glVertex3f(pt1.x,pt1.y,pt1.z);
				glVertex3f(pt2.x,pt2.y,pt2.z);
			glEnd();
		}
	return TRUE;										// Everything Went OK
}

GLvoid KillGLWindow(GLvoid)								// Properly Kill The Window
{
	if (fullscreen)										// Are We In Fullscreen Mode?
	{
		ChangeDisplaySettings(NULL,0);					// If So Switch Back To The Desktop
		ShowCursor(TRUE);								// Show Mouse Pointer
	}

	if (hRC)											// Do We Have A Rendering Context?
	{
		if (!wglMakeCurrent(NULL,NULL))					// Are We Able To Release The DC And RC Contexts?
		{
			MessageBox(NULL,"Release Of DC And RC Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		}

		if (!wglDeleteContext(hRC))						// Are We Able To Delete The RC?
		{
			MessageBox(NULL,"Release Rendering Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		}
		hRC=NULL;										// Set RC To NULL
	}

	if (hDC && !ReleaseDC(hWnd,hDC))					// Are We Able To Release The DC
	{
		MessageBox(NULL,"Release Device Context Failed.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hDC=NULL;										// Set DC To NULL
	}

	if (hWnd && !DestroyWindow(hWnd))					// Are We Able To Destroy The Window?
	{
		MessageBox(NULL,"Could Not Release hWnd.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hWnd=NULL;										// Set hWnd To NULL
	}

	if (!UnregisterClass("OpenGL",hInstance))			// Are We Able To Unregister Class
	{
		MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
		hInstance=NULL;									// Set hInstance To NULL
	}
}

/*	This Code Creates Our OpenGL Window.  Parameters Are:					*
 *	title			- Title To Appear At The Top Of The Window				*
 *	width			- Width Of The GL Window Or Fullscreen Mode				*
 *	height			- Height Of The GL Window Or Fullscreen Mode			*
 *	bits			- Number Of Bits To Use For Color (8/16/24/32)			*
 *	fullscreenflag	- Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE)	*/
 
BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
{
	GLuint		PixelFormat;			// Holds The Results After Searching For A Match
	WNDCLASS	wc;						// Windows Class Structure
	DWORD		dwExStyle;				// Window Extended Style
	DWORD		dwStyle;				// Window Style
	RECT		WindowRect;				// Grabs Rectangle Upper Left / Lower Right Values
	WindowRect.left=(long)0;			// Set Left Value To 0
	WindowRect.right=(long)width;		// Set Right Value To Requested Width
	WindowRect.top=(long)0;				// Set Top Value To 0
	WindowRect.bottom=(long)height;		// Set Bottom Value To Requested Height

	fullscreen=fullscreenflag;			// Set The Global Fullscreen Flag

	hInstance			= GetModuleHandle(NULL);				// Grab An Instance For Our Window
	wc.style			= CS_HREDRAW | CS_VREDRAW | CS_OWNDC;	// Redraw On Size, And Own DC For Window.
	wc.lpfnWndProc		= (WNDPROC) WndProc;					// WndProc Handles Messages
	wc.cbClsExtra		= 0;									// No Extra Window Data
	wc.cbWndExtra		= 0;									// No Extra Window Data
	wc.hInstance		= hInstance;							// Set The Instance
	wc.hIcon			= LoadIcon(NULL, IDI_WINLOGO);			// Load The Default Icon
	wc.hCursor			= LoadCursor(NULL, IDC_ARROW);			// Load The Arrow Pointer
	wc.hbrBackground	= NULL;									// No Background Required For GL
	wc.lpszMenuName		= NULL;									// We Don't Want A Menu
	wc.lpszClassName	= "OpenGL";								// Set The Class Name

	if (!RegisterClass(&wc))									// Attempt To Register The Window Class
	{
		MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;											// Return FALSE
	}
	
	if (fullscreen)												// Attempt Fullscreen Mode?
	{
		DEVMODE dmScreenSettings;								// Device Mode
		memset(&dmScreenSettings,0,sizeof(dmScreenSettings));	// Makes Sure Memory's Cleared
		dmScreenSettings.dmSize=sizeof(dmScreenSettings);		// Size Of The Devmode Structure
		dmScreenSettings.dmPelsWidth	= width;				// Selected Screen Width
		dmScreenSettings.dmPelsHeight	= height;				// Selected Screen Height
		dmScreenSettings.dmBitsPerPel	= bits;					// Selected Bits Per Pixel
		dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

		// Try To Set Selected Mode And Get Results.  NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
		if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
		{
			// If The Mode Fails, Offer Two Options.  Quit Or Use Windowed Mode.
			if (MessageBox(NULL,"The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?","NeHe GL",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
			{
				fullscreen=FALSE;		// Windowed Mode Selected.  Fullscreen = FALSE
			}
			else
			{
				// Pop Up A Message Box Letting User Know The Program Is Closing.
				MessageBox(NULL,"Program Will Now Close.","ERROR",MB_OK|MB_ICONSTOP);
				return FALSE;									// Return FALSE
			}
		}
	}

	if (fullscreen)												// Are We Still In Fullscreen Mode?
	{
		dwExStyle=WS_EX_APPWINDOW;								// Window Extended Style
		dwStyle=WS_POPUP;										// Windows Style
		ShowCursor(FALSE);										// Hide Mouse Pointer
	}
	else
	{
		dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;			// Window Extended Style
		dwStyle=WS_OVERLAPPEDWINDOW;							// Windows Style
	}

	AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);		// Adjust Window To True Requested Size

	// Create The Window
	if (!(hWnd=CreateWindowEx(	dwExStyle,							// Extended Style For The Window
								"OpenGL",							// Class Name
								title,								// Window Title
								dwStyle |							// Defined Window Style
								WS_CLIPSIBLINGS |					// Required Window Style
								WS_CLIPCHILDREN,					// Required Window Style
								0, 0,								// Window Position
								WindowRect.right-WindowRect.left,	// Calculate Window Width
								WindowRect.bottom-WindowRect.top,	// Calculate Window Height
								NULL,								// No Parent Window
								NULL,								// No Menu
								hInstance,							// Instance
								NULL)))								// Dont Pass Anything To WM_CREATE
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	static	PIXELFORMATDESCRIPTOR pfd=				// pfd Tells Windows How We Want Things To Be
	{
		sizeof(PIXELFORMATDESCRIPTOR),				// Size Of This Pixel Format Descriptor
		1,											// Version Number
		PFD_DRAW_TO_WINDOW |						// Format Must Support Window
		PFD_SUPPORT_OPENGL |						// Format Must Support OpenGL
		PFD_DOUBLEBUFFER,							// Must Support Double Buffering
		PFD_TYPE_RGBA,								// Request An RGBA Format
		bits,										// Select Our Color Depth
		0, 0, 0, 0, 0, 0,							// Color Bits Ignored
		0,											// No Alpha Buffer
		0,											// Shift Bit Ignored
		0,											// No Accumulation Buffer
		0, 0, 0, 0,									// Accumulation Bits Ignored
		16,											// 16Bit Z-Buffer (Depth Buffer)  
		0,											// No Stencil Buffer
		0,											// No Auxiliary Buffer
		PFD_MAIN_PLANE,								// Main Drawing Layer
		0,											// Reserved
		0, 0, 0										// Layer Masks Ignored
	};
	
	if (!(hDC=GetDC(hWnd)))							// Did We Get A Device Context?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd)))	// Did Windows Find A Matching Pixel Format?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if(!SetPixelFormat(hDC,PixelFormat,&pfd))		// Are We Able To Set The Pixel Format?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if (!(hRC=wglCreateContext(hDC)))				// Are We Able To Get A Rendering Context?
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	if(!wglMakeCurrent(hDC,hRC))					// Try To Activate The Rendering Context
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	ShowWindow(hWnd,SW_SHOW);						// Show The Window
	SetForegroundWindow(hWnd);						// Slightly Higher Priority
	SetFocus(hWnd);									// Sets Keyboard Focus To The Window
	ReSizeGLScene(width, height);					// Set Up Our Perspective GL Screen

	if (!InitGL())									// Initialize Our Newly Created GL Window
	{
		KillGLWindow();								// Reset The Display
		MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE
	}

	return TRUE;									// Success
}

LRESULT CALLBACK WndProc(	HWND	hWnd,			// Handle For This Window
							UINT	uMsg,			// Message For This Window
							WPARAM	wParam,			// Additional Message Information
							LPARAM	lParam)			// Additional Message Information
{
	switch (uMsg)									// Check For Windows Messages
	{
		case WM_ACTIVATE:							// Watch For Window Activate Message
		{
			if (!HIWORD(wParam))					// Check Minimization State
			{
				active=TRUE;						// Program Is Active
			}
			else
			{
				active=FALSE;						// Program Is No Longer Active
			}

			return 0;								// Return To The Message Loop
		}

		case WM_SYSCOMMAND:							// Intercept System Commands
		{
			switch (wParam)							// Check System Calls
			{
				case SC_SCREENSAVE:					// Screensaver Trying To Start?
				case SC_MONITORPOWER:				// Monitor Trying To Enter Powersave?
				return 0;							// Prevent From Happening
			}
			break;									// Exit
		}

		case WM_CLOSE:								// Did We Receive A Close Message?
		{
			PostQuitMessage(0);						// Send A Quit Message
			return 0;								// Jump Back
		}

		case WM_KEYDOWN:							// Is A Key Being Held Down?
		{
			keys[wParam] = TRUE;					// If So, Mark It As TRUE
			return 0;								// Jump Back
		}

		case WM_KEYUP:								// Has A Key Been Released?
		{
			keys[wParam] = FALSE;					// If So, Mark It As FALSE
			return 0;								// Jump Back
		}

		case WM_SIZE:								// Resize The OpenGL Window
		{
			ReSizeGLScene(LOWORD(lParam),HIWORD(lParam));  // LoWord=Width, HiWord=Height
			return 0;								// Jump Back
		}
	}

	// Pass All Unhandled Messages To DefWindowProc
	return DefWindowProc(hWnd,uMsg,wParam,lParam);
}
int start_window();
void main(){
	start_window();
}
int start_window()
{
	MSG		msg;									// Windows Message Structure
	BOOL	done=FALSE;								// Bool Variable To Exit Loop
	fullscreen=FALSE;

	// Create Our OpenGL Window
	if (!CreateGLWindow("Splines",640,480,16,fullscreen))
	{
		return 0;									// Quit If Window Was Not Created
	}

	while(!done)									// Loop That Runs While done=FALSE
	{
		if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))	// Is There A Message Waiting?
		{
			if (msg.message==WM_QUIT)				// Have We Received A Quit Message?
			{
				done=TRUE;							// If So done=TRUE
			}
			else									// If Not, Deal With Window Messages
			{
				TranslateMessage(&msg);				// Translate The Message
				DispatchMessage(&msg);				// Dispatch The Message
			}
		}
		else										// If There Are No Messages
		{
			// Draw The Scene.  Watch For ESC Key And Quit Messages From DrawGLScene()
			if (active)								// Program Active?
			{
				if (keys[VK_ESCAPE])				// Was ESC Pressed?
				{
					done=TRUE;						// ESC Signalled A Quit
				}
				else								// Not Time To Quit, Update Screen
				{
					DrawGLScene();					// Draw The Scene
					SwapBuffers(hDC);				// Swap Buffers (Double Buffering)
				}
			}

			if (keys['W']){
				trans.z += 5;
				printf("Forward");
			}
			if (keys['S']){
				trans.z -= 5;
			}
			if (keys['D']){
				trans.x -= 5;
				printf("Forward");
			}
			if (keys['A']){
				trans.x += 5;
			}
			if (keys[VK_F1])						// Is F1 Being Pressed?
			{
				keys[VK_F1]=FALSE;					// If So Make Key FALSE
				KillGLWindow();						// Kill Our Current Window
				fullscreen=!fullscreen;				// Toggle Fullscreen / Windowed Mode
				// Recreate Our OpenGL Window
				if (!CreateGLWindow("NeHe's OpenGL Framework",640,480,16,fullscreen))
				{
					return 0;						// Quit If Window Was Not Created
				}
			}
		}

		rotY += 1;
	}

	// Shutdown
	KillGLWindow();									// Kill The Window
	return (msg.wParam);							// Exit The Program
}