Hi there I downloaded NeHe''s OpenGL tutorials, and on number six (texture mapped rotating cube) I tried to change it to six textures (one for each face) instead of only one. However, it doesn''t work....the cube turns black instead of being texture mapped.... Why??? I seriously doubt that you will read the whole code, but I though I''d post it anyway. So here goes. Thanks in advance. #include // Header File For Memory Functions #include // Header File For Some Common Things #include // Header File For Standard Input/Output #include // Header File For The Standard Library #include // Header File For str... Functions Etc. #include // Header File For The OpenGL32 Library #include // Header File For The GLU32 Library #include // Header File For The GLAUX Library #pragma comment(lib, "opengl32.lib") #pragma comment(lib, "glu32.lib") #pragma comment(lib, "glaux.lib") GLuint texture[6]; GLfloat X_Rotation = 0.0f; GLfloat Y_Rotation = 0.0f; GLfloat Z_Rotation = 0.0f; 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 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); // Declaration For WndProc AUX_RGBImageRec *LoadBMP(char *Filename) { FILE *File = NULL; if (!Filename) return(NULL); File = fopen(Filename, "r"); if (File) { fclose(File); return(auxDIBImageLoad(Filename)); } return(NULL); } bool LoadGLTextures() { bool Status = false; AUX_RGBImageRec *TextureImages[6]; memset(TextureImages, 0, sizeof(void *) * 6); TextureImages[0] = LoadBMP("Data/front.bmp"); TextureImages[1] = LoadBMP("Data/back.bmp"); TextureImages[2] = LoadBMP("Data/top.bmp"); TextureImages[3] = LoadBMP("Data/bottom.bmp"); TextureImages[4] = LoadBMP("Data/right.bmp"); TextureImages[5] = LoadBMP("Data/left.bmp"); for (int c = 0; c < 6; c++) { if (TextureImages[c] == NULL) { return(false); } } Status = true; glGenTextures(6, texture); for (c = 0; c < 6; c++) { glBindTexture(GL_TEXTURE_2D, texture[c]); glTexImage2D( GL_TEXTURE_2D, 0, 3, TextureImages[c]->sizeX, TextureImages[c]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImages[c]->data); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); } if (TextureImages[0] && TextureImages[1] && TextureImages[2] && TextureImages[3] && TextureImages[4] && TextureImages[5]) { for (int c = 0; c < 6; c++) { if (TextureImages[c]->data) { free(TextureImages[c]->data); } free(TextureImages[c]); } } return(Status); } GLvoid ReSizeGLScene(GLsizei width, GLsizei height) // Resize And Initialize The GL Window { if (height == 0) // Prevent A Divide By Zero 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 } bool InitGL(GLvoid) // All Setup For OpenGL Goes Here { if (!LoadGLTextures()) return(false); glEnable(GL_TEXTURE_2D); glShadeModel(GL_SMOOTH); // Enable Smooth Shading glClearColor(0.1f, 0.1f, 0.1f, 0.5f); // Dark Green Background glClearDepth(1.0f); // Depth Buffer Setup glEnable(GL_DEPTH_TEST); // Enables Depth Testing glDepthFunc(GL_LEQUAL); // The Type Of Depth Testing To Do glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations return(true); // Initialization Went OK } bool 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(); glTranslatef( 0.0f, 0.0f,-5.0f); // Move Left 1.5 Units And Into The Screen 6.0 Units glRotatef(X_Rotation, 1.0f, 0.0f, 0.0f); // Rotate Cube X glRotatef(Y_Rotation, 0.0f, 1.0f, 0.0f); // Rotate Cube Y glRotatef(Z_Rotation, 0.0f, 0.0f, 1.0f); // Rotate Cube Z // Front Face glBindTexture(GL_TEXTURE_2D, texture[0]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glEnd(); // Back Face glBindTexture(GL_TEXTURE_2D, texture[1]); glBegin(GL_QUADS); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-1.0f); glEnd(); // Top Face glBindTexture(GL_TEXTURE_2D, texture[2]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-1.0f); glEnd(); // Bottom Face glBindTexture(GL_TEXTURE_2D, texture[3]); glBegin(GL_QUADS); glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f,-1.0f,-1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f,-1.0f,-1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); glEnd(); // Right Face glBindTexture(GL_TEXTURE_2D, texture[4]); glBegin(GL_QUADS); glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f,-1.0f,-1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f,-1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f,-1.0f, 1.0f); glEnd(); // Left Face glBindTexture(GL_TEXTURE_2D, texture[5]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f,-1.0f,-1.0f); glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f,-1.0f, 1.0f); glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f); glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f,-1.0f); glEnd(); X_Rotation+=0.4f; Y_Rotation+=0.3f; Z_Rotation+=0.2f; return(true); } 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 = 0; // Set Left Value To 0 WindowRect.right = (long)width; // Set Right Value To Requested Width WindowRect.top =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 Your 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 Pixel Format.", "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 WINAPI WinMain( HINSTANCE hInstance, // Instance HINSTANCE hPrevInstance, // Previous Instance LPSTR lpCmdLine, // Command Line Parameters int nCmdShow) // Window Show State { MSG msg; // Windows Message Structure 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 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[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 } } } } // Shutdown KillGLWindow(); // Kill The Window return(msg.wParam); // Exit The Program }

Are your texture bitmaps dimensions powers of two? (I think they also have to be greater than 16) If not, it won''t work.

Also, I didn''t look at your code that closely (to be honest) but I''ll give you mine (also based off of NeHe''s code):

  int LoadGLTexture(GLuint * texture, char * filename, bool mipmapped)									// 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(filename))	{		Status = true;									// Set The Status To TRUE		glGenTextures(1, texture);					// Create The Texture				if(mipmapped)		{			glBindTexture(GL_TEXTURE_2D, *texture);			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);			gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);		}		else		{			glBindTexture(GL_TEXTURE_2D, *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);			glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);		}	}	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}  

Then, in GLInit, just call the function like so, assuming textureid is a GLuint, and you want mipmapping. If you don''t want mipmapping, call it with false instead of true (for linear filtering):

  if(!LoadGLTexture(&textureid, "filename.bmp", true)){return false;}  

Oh, and by the way, thanks for this code; I was looking for how to do that from within a header file!

  #pragma comment(lib, "opengl32.lib")#pragma comment(lib, "glu32.lib")#pragma comment(lib, "glaux.lib")[/cource]  

Thank you! It works now... Thanks!