* *This Code Was Created By Jeff Molofee 2000 *A HUGE Thanks To Fredric Echols For Cleaning Up *And Optimizing The Base Code, Making It More Flexible! *If You've Found This Code Useful, Please Let Me Know. *Visit My Site At nehe.gamedev.net */#include<fstream>#include<iostream>#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 Libraryusing namespace std;HDChDC=NULL;// Private GDI Device ContextHGLRChRC=NULL;// Permanent Rendering ContextHWNDhWnd=NULL;// Holds Our Window HandleHINSTANCEhInstance;// Holds The Instance Of The Applicationboolkeys[256];// Array Used For The Keyboard Routineboolactive=TRUE;// Window Active Flag Set To TRUE By Defaultboolfullscreen=false;// Fullscreen Flag Set To Fullscreen Mode By Defaultstruct coordinate{double x;double y;double z;};struct ground{int a;int b;int c;int d;};coordinate point[1442];ground shape[1476];GLfloatrtri;// Angle For The Triangle ( NEW )GLfloatrquad;// Angle For The Quad ( NEW )LRESULTCALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);// Declaration For WndProcGLvoid 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 ViewportglMatrixMode(GL_PROJECTION);// Select The Projection MatrixglLoadIdentity();// Reset The Projection Matrix// Calculate The Aspect Ratio Of The WindowgluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);// Select The Modelview MatrixglLoadIdentity();// Reset The Modelview Matrix}int InitGL(GLvoid)// All Setup For OpenGL Goes Here{ ifstream infile,infile2; infile.open("2.txt");int m=0; infile>>m; for(int n=0;n<1442;n++){ infile>>point[m].x;infile>>point[m].y;infile>>point[m].z;infile>>m;}infile.close();infile2.open("1.dat");int q=0; infile2>>q; for(n=0;n<1400;n++){ infile2>>shape[q].a;infile2>>shape[q].b;infile2>>shape[q].c;infile2>>shape[q].d;infile2>>q;} infile2.close();glShadeModel(GL_SMOOTH);// Enable Smooth ShadingglClearColor(0.0f, 0.0f, 0.0f, 0.5f);// Black BackgroundglClearDepth(1.0f);// Depth Buffer SetupglEnable(GL_DEPTH_TEST);// Enables Depth TestingglDepthFunc(GL_LEQUAL);// The Type Of Depth Testing To DoglHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);// Really Nice Perspective Calculationsreturn TRUE;// Initialization Went OK}int DrawGLScene(GLvoid)// Here's Where We Do All The Drawing{glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);for(int number=1;number<1476;number++){if(shape[number].d==0){glLoadIdentity();// Reset The Current Modelview Matrix glTranslatef(-1.5f,0.0f,-6.0f);// Move Left 1.5 Units And Into The Screen 6.0 // glRotatef(rtri,0.0f,1.0f,0.0f);// Rotate The Triangle On The Y axis ( NEW ) glBegin(GL_TRIANGLES);// Start Drawing A Triangle glColor3f(1.0f,0.0f,0.0f);// Set Top Point Of Triangle To Red glVertex3f( point[shape[number].a].x, point[shape[number].a].y, point[shape[number].a].z);// First Point Of The Triangle glVertex3f( point[shape[number].b].x, point[shape[number].b].y, point[shape[number].b].z);// Second Point Of The Triangle glVertex3f( point[shape[number].c].x, point[shape[number].c].y, point[shape[number].c].z);// Third Point Of The Triangle glEnd();}else{ // Done Drawing The Triangle glLoadIdentity();// Reset The Current Modelview Matrix glTranslatef(1.5f,0.0f,-6.0f);// Move Right 1.5 Units And Into The Screen 6.0//glRotatef(rquad,1.0f,0.0f,0.0f);// Rotate The Quad On The X axis ( NEW )glColor3f(0.5f,0.5f,1.0f);// Set The Color To Blue One Time OnlyglBegin(GL_QUADS);// Draw A QuadglVertex3f( point[shape[number].a].x, point[shape[number].a].y, point[shape[number].a].z);// Top LeftglVertex3f( point[shape[number].b].x, point[shape[number].b].y, point[shape[number].b].z);// Top RightglVertex3f( point[shape[number].c].x, point[shape[number].c].y, point[shape[number].c].z);// Bottom RightglVertex3f( point[shape[number].d].x, point[shape[number].d].y, point[shape[number].d].z);// Bottom LeftglEnd();} }// Done Drawing The Quadrtri+=0.2f;// Increase The Rotation Variable For The Triangle ( NEW )rquad-=0.15f;// Decrease The Rotation Variable For The Quad ( NEW )return TRUE;// Keep Going}GLvoid KillGLWindow(GLvoid)// Properly Kill The Window{if (fullscreen)// Are We In Fullscreen Mode?{ChangeDisplaySettings(NULL,0);// If So Switch Back To The DesktopShowCursor(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){GLuintPixelFormat;// Holds The Results After Searching For A MatchWNDCLASSwc;// Windows Class StructureDWORDdwExStyle;// Window Extended StyleDWORDdwStyle;// Window StyleRECTWindowRect;// Grabs Rectangle Upper Left / Lower Right ValuesWindowRect.left=(long)0;// Set Left Value To 0WindowRect.right=(long)width;// Set Right Value To Requested WidthWindowRect.top=(long)0;// Set Top Value To 0WindowRect.bottom=(long)height;// Set Bottom Value To Requested Heightfullscreen=fullscreenflag;// Set The Global Fullscreen FlaghInstance= GetModuleHandle(NULL);// Grab An Instance For Our Windowwc.style= CS_HREDRAW | CS_VREDRAW | CS_OWNDC;// Redraw On Size, And Own DC For Window.wc.lpfnWndProc= (WNDPROC) WndProc;// WndProc Handles Messageswc.cbClsExtra= 0;// No Extra Window Datawc.cbWndExtra= 0;// No Extra Window Datawc.hInstance= hInstance;// Set The Instancewc.hIcon= LoadIcon(NULL, IDI_WINLOGO);// Load The Default Iconwc.hCursor= LoadCursor(NULL, IDC_ARROW);// Load The Arrow Pointerwc.hbrBackground= NULL;// No Background Required For GLwc.lpszMenuName= NULL;// We Don't Want A Menuwc.lpszClassName= "OpenGL";// Set The Class Nameif (!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 Modememset(&dmScreenSettings,0,sizeof(dmScreenSettings));// Makes Sure Memory's CleareddmScreenSettings.dmSize=sizeof(dmScreenSettings);// Size Of The Devmode StructuredmScreenSettings.dmPelsWidth= width;// Selected Screen WidthdmScreenSettings.dmPelsHeight= height;// Selected Screen HeightdmScreenSettings.dmBitsPerPel= bits;// Selected Bits Per PixeldmScreenSettings.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 StyledwStyle=WS_POPUP;// Windows StyleShowCursor(FALSE);// Hide Mouse Pointer}else{dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;// Window Extended StyledwStyle=WS_OVERLAPPEDWINDOW;// Windows Style}AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);// Adjust Window To True Requested Size// Create The Windowif (!(hWnd=CreateWindowEx(dwExStyle,// Extended Style For The Window"OpenGL",// Class Nametitle,// Window TitledwStyle |// Defined Window StyleWS_CLIPSIBLINGS |// Required Window StyleWS_CLIPCHILDREN,// Required Window Style0, 0,// Window PositionWindowRect.right-WindowRect.left,// Calculate Window WidthWindowRect.bottom-WindowRect.top,// Calculate Window HeightNULL,// No Parent WindowNULL,// No MenuhInstance,// InstanceNULL)))// Dont Pass Anything To WM_CREATE{KillGLWindow();// Reset The DisplayMessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);return FALSE;// Return FALSE}staticPIXELFORMATDESCRIPTOR pfd=// pfd Tells Windows How We Want Things To Be{sizeof(PIXELFORMATDESCRIPTOR),// Size Of This Pixel Format Descriptor1,// Version NumberPFD_DRAW_TO_WINDOW |// Format Must Support WindowPFD_SUPPORT_OPENGL |// Format Must Support OpenGLPFD_DOUBLEBUFFER,// Must Support Double BufferingPFD_TYPE_RGBA,// Request An RGBA Formatbits,// Select Our Color Depth0, 0, 0, 0, 0, 0,// Color Bits Ignored0,// No Alpha Buffer0,// Shift Bit Ignored0,// No Accumulation Buffer0, 0, 0, 0,// Accumulation Bits Ignored16,// 16Bit Z-Buffer (Depth Buffer) 0,// No Stencil Buffer0,// No Auxiliary BufferPFD_MAIN_PLANE,// Main Drawing Layer0,// Reserved0, 0, 0// Layer Masks Ignored};if (!(hDC=GetDC(hWnd)))// Did We Get A Device Context?{KillGLWindow();// Reset The DisplayMessageBox(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 DisplayMessageBox(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 DisplayMessageBox(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 DisplayMessageBox(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 DisplayMessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);return FALSE;// Return FALSE}ShowWindow(hWnd,SW_SHOW);// Show The WindowSetForegroundWindow(hWnd);// Slightly Higher PrioritySetFocus(hWnd);// Sets Keyboard Focus To The WindowReSizeGLScene(width, height);// Set Up Our Perspective GL Screenif (!InitGL())// Initialize Our Newly Created GL Window{KillGLWindow();// Reset The DisplayMessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);return FALSE;// Return FALSE}return TRUE;// Success}LRESULT CALLBACK WndProc(HWNDhWnd,// Handle For This WindowUINTuMsg,// Message For This WindowWPARAMwParam,// Additional Message InformationLPARAMlParam)// 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 Messagereturn 0;// Jump Back}case WM_KEYDOWN:// Is A Key Being Held Down?{keys[wParam] = TRUE;// If So, Mark It As TRUEreturn 0;// Jump Back}case WM_KEYUP:// Has A Key Been Released?{keys[wParam] = FALSE;// If So, Mark It As FALSEreturn 0;// Jump Back}case WM_SIZE:// Resize The OpenGL Window{ReSizeGLScene(LOWORD(lParam),HIWORD(lParam)); // LoWord=Width, HiWord=Heightreturn 0;// Jump Back}}// Pass All Unhandled Messages To DefWindowProcreturn DefWindowProc(hWnd,uMsg,wParam,lParam);}int WINAPI WinMain(HINSTANCEhInstance,// InstanceHINSTANCEhPrevInstance,// Previous InstanceLPSTRlpCmdLine,// Command Line ParametersintnCmdShow)// Window Show State{MSGmsg;// Windows Message StructureBOOLdone=FALSE;// Bool Variable To Exit Loop// Ask The User Which Screen Mode They Preferif (MessageBox(NULL,"Would You Like To Run In Fullscreen Mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO){fullscreen=FALSE;// Windowed Mode}// Create Our OpenGL Windowif (!CreateGLWindow("NeHe's Rotation Tutorial",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 MessageDispatchMessage(&msg);// Dispatch The Message}}else// If There Are No Messages{// Draw The Scene. Watch For ESC Key And Quit Messages From DrawGLScene()if ((active && !DrawGLScene()) || keys[VK_ESCAPE])// Active? Was There A Quit Received?{done=TRUE;// ESC or DrawGLScene Signalled A Quit}else// Not Time To Quit, Update Screen{SwapBuffers(hDC);// Swap Buffers (Double Buffering)}if (keys[VK_F1])// Is F1 Being Pressed?{keys[VK_F1]=FALSE;// If So Make Key FALSEKillGLWindow();// Kill Our Current Windowfullscreen=!fullscreen;// Toggle Fullscreen / Windowed Mode// Recreate Our OpenGL Windowif (!CreateGLWindow("NeHe's Rotation Tutorial",640,480,16,fullscreen)){return 0;// Quit If Window Was Not Created}}}}// ShutdownKillGLWindow();// Kill The Windowreturn (msg.wParam);// Exit The Program}
