Lesson 6 problems

Ekim_Gram · 2003-08-15T04:33:33

I'm using Visual Studio 6 Enterprise Edition and I'm using the PDF version of the tutorials from the NeHe site. Here's my code for those of you who don't have it: #include <windows.h> // Header File for Windows #include <stdio.h> // Header File for standard Input/Output library #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 HGLRC hRC=NULL; // Permanent rendering ocntext HDC hDC=NULL; // Private GDI device context HWND hWnd=NULL; // Holds out 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 is set to fullscreen mode by default GLfloat xrot; // X Rotation GLfloat yrot; // Y Rotation GLfloat zrot; // Z Rotation GLuint texture[1]; // Storage for one texture LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration for WinProc AUX_RGBImageRec *LoadBMP(char *Filename) // Loads a bitmap image { FILE *File=NULL; // File handle if (!Filename) // Make sure a filename was given { return NULL; // If not return NULL } File=fopen(Filename,"x"); // Check to see if the file exists if (File) // Does the file exist? { fclose(File); // Close the handle return auxDIBImageLoad(Filename); // Load the Bitmap and return a pointer } return NULL; // If load failed return NULL } int LoadGLTextures() // Load bitmaps and convert to textures { int Status=FALSE; // Status indicator AUX_RGBImageRec *TextureImage[1]; // Create storage space for the texture memset (TextureImage,0,sizeof(void *)*1); // Set the pointer to NULL // Load the bitmap, check for errors, if bitmap's not found quit if (TextureImage[0]=LoadBMP("Data/NeHe.bmp")) { Status=TRUE; // Set the status to TRUE glGenTextures(1, &texture[0]); // Create the texture // Typical texture generation using data from the bitmmap glBindTexture(GL_TEXTURE_2D, texture[0]); // Generate the texture glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); // Linear filtering glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // Linear filtering } if (TextureImage[0]) // If texture exists { if(TextureImage[0]->data) // If texture image exists { free(TextureImage[0]->data); // Free the texture image memory } free(TextureImage[0]); // Free the image structure } return Status; // Return the status } 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,0.1f,100.0f); glMatrixMode(GL_MODELVIEW); // select the modelview matrix glLoadIdentity(); // reset the modelview matrix } int InitGL(GLvoid) // all setup for OpenGL goes here { if (!LoadGLTextures()) // Jump to texture loading routing { return FALSE; // if texture didn't load return FALSE } glEnable(GL_TEXTURE_2D); // Enables texture mapping glShadeModel(GL_SMOOTH); // enables smooth shading glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // black background glClearDepth(1.0f); // depth buffer setup glEnable(GL_DEPTH_TEST); // enables depth testing glDepthFunc(GL_LEQUAL); // the type of depth test to do glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // really nice perspective calculations return TRUE; // initializatoin 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 matrix glTranslatef(0.0f, 0.0f, -5.0f); // Move into the screen 5 units glRotatef(xrot,1.0f,0.0f,0.0f); // Rotate on the X axis glRotatef(yrot,0.0f,1.0f,0.0f); // Rotate on the Y axis glRotatef(zrot,0.0f,0.0f,1.0f); // Rotate on the Z axis glBindTexture(GL_TEXTURE_2D, texture[0]); // Select our texture glBegin(GL_QUADS); // Front Face glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom left of the texture and quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom right of the texture and quad glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top right of the texture and quad glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top left of the texture and quad // Back Face glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom right of the texture and quad glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); // Top right of the texture and quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-1.0f); // Top left of the texture and quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom left of the texture and quad // Top Face glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); // Top left of the texture and quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom left of the texture and quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Bottom right of the texture and quad glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-1.0f); // Top right of the texture and quad // Bottom face glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); // Top right of the texture and quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,-1.0f,-1.0f); // Top left of the texture and quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom left of the texture and quad glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom right of the texture and quad // Right face glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-1.0f); // Bottom right of the texture and quad glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-1.0f); // Top right of the texture and quad glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); // Top left of the texture and quad glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); // Bottom left of the texture and quad // Left Face glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-1.0f); // Bottom left of the texture and quad glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); // Bottom right of the texture and quad glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); // Top right of the texture and quad glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); // Top left of the texture and quad glEnd(); xrot+=0.3f; // X axis rotation yrot+=0.2f; // Y axis rotation zrot+=0.4f; // Z axis rotation 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 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 the DC to NULL } if (hWnd && !DestroyWindow(hWnd)) // are we able to destrou 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 } } BOOL CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag) { GLuint PixelFormat; // holds the results after searching for a match WNDCLASS wc; // window 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 or move, 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; //exit and return FALSE } if (fullscreen) // attempt fullscreen mode? { DEVMODE dmScreenSettings; // device mode memset(&dmScreenSettings,0,sizeof(dmScreenSettings)); // make 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 delected mode and get results. NOTE: CDS_FULLSCREEN gets rid of start bar if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL) { // If the mode fials, offer two options. Quit or run in a window 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; // select windowed mode (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; // exit and return FALSE } } } if (fullscreen) // are we still in fullscreen mode? { dwExStyle=WS_EX_APPWINDOW; // window extended class 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 requested size if (!(hWnd=CreateWindowEx( dwExStyle, // extended window style "OpenGL", // class name title, // window title WS_CLIPSIBLINGS | // required window style WS_CLIPCHILDREN | // required window style dwStyle, // selected window style 0, 0, // window position WindowRect.right-WindowRect.left, // Calculate adjusted window width WindowRect.bottom-WindowRect.top, // Calculate adjusted window height NULL, // no parent window NULL, // no menu hInstance, // instance NULL))) // don't 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 widnws 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 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 keyboartd 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) { 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 message loop } case WM_SYSCOMMAND: // intercept system commands { switch(wParam) // check system calls { case SC_SCREENSAVE: // scrensaver trying to start? case SC_MONITORPOWER: // monitor trying to enter powersave? return 0; // prevent this from happening } break; // exit } case WM_CLOSE: // did we recieve 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 WINAPI WinMain( HINSTANCE hInstance, // instance HINSTANCE hPrevInstance, // previous instance LPSTR lpCmdLine, // command line parameters int nCmdShow) // window show state { MSG msg; // windows message BOOL done=FALSE; // bool variable to exit loop // Ask the user which screen mode they prefer if (MessageBox(NULL,"Would you like to run in fullscreen mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO) { fullscreen=FALSE; // windowed mode } // create our OpenGL window if (!CreateGLWindow("NeHe's OpenGL Framework",640,480,16,fullscreen)) { return 0; // quit if window was not created } while(!done) // loop that runs until done=TRUE { if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) // is there a message waiting? { if (msg.message==WM_QUIT) // have we recieved 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[VK_F1]) // is F1 being pressed? { keys[VK_F1]=FALSE; // if so, make key FALSE KillGLWindow(); // kill our current window fullscreen=!fullscreen; // toggle fullscren / windowed mode // recreate our OpenGL window if (!CreateGLWindow("NeHe's OpenGL Tutorial",640,480,16,fullscreen)) { return 0; // quit if window was not created } } } } // shutdown KillGLWindow(); // kill the window return (msg.wParam); // exit the program } I get no compiler errors when I build it but whenever I try to run it I get the "Initialization failed" box that is supposed to run when InitGl() doesn't go the right way: 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 } The code for the window is from lesson 1. There's no town drunk here, we all take turns. Velocity Gaming Force [edited by - Ekim_Gram on July 21, 2003 8:02:12 PM] [edited by - Ekim_Gram on July 21, 2003 8:02:59 PM]

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Started by Ekim_Gram July 21, 2003 07:00 PM

9 comments, last by Ekim_Gram 21 years, 6 months ago

DecipherOne

289

August 15, 2003 04:33 AM

Nevermind, there was a small syntax error, I wasn''t specifying the data components for the texture, this effect looks awesome with the texture I used too.

Lesson 6 problems

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Lesson 6 problems

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