Textausgabe OpenGL
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Hallo, habe ein kleines Programm, welches Text ausgeben sollte. Tut es aber nicht. Vielleicht kann ja mal jemand drüber gucken und mir den Fehler sagen.
#include <iostream> #include <stdlib.h> #include <windows.h> #include <iostream> #include <stdlib.h> #include <GL/glut.h> #include <gl/glaux.h> #include <stdio.h> // Header File For Standard Input/Output ( ADD ) #include <stdarg.h> using namespace std; int width =400; int height =400; 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 GLuint base; // Base Display List For The Font Set GLvoid BuildFont(GLvoid) // Build Our Bitmap Font { HFONT font; // Windows Font ID HFONT oldfont; // Used For Good House Keeping base = glGenLists(96); // Storage For 96 Characters font = CreateFont( -24, // Height Of Font 0, // Width Of Font 0, // Angle Of Escapement 0, // Orientation Angle FW_BOLD, // Font Weight FALSE, // Italic FALSE, // Underline FALSE, // Strikeout ANSI_CHARSET, // Character Set Identifier OUT_TT_PRECIS, // Output Precision CLIP_DEFAULT_PRECIS, // Clipping Precision ANTIALIASED_QUALITY, // Output Quality FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch "Courier New"); // Font Name oldfont = (HFONT)SelectObject(hDC, font); // Selects The Font We Want wglUseFontBitmaps(hDC, 32, 96, base); // Builds 96 Characters Starting At Character 32 SelectObject(hDC, oldfont); // Selects The Font We Want DeleteObject(font); // Delete The Font } //Function to pdint text - in display aufgerufen GLvoid glPrint(const char *fmt, ...) // Custom GL "Print" Routine { char text[256]; // Holds Our String va_list ap; // Pointer To List Of Arguments if (fmt == NULL) // If There's No Text return; // Do Nothing va_start(ap, fmt); // Parses The String For Variables vsprintf(text, fmt, ap); // And Converts Symbols To Actual Numbers va_end(ap); // Results Are Stored In Text glPushAttrib(GL_LIST_BIT); // Pushes The Display List Bits glListBase(base - 32); // Sets The Base Character to 32 glCallLists(strlen(text), GL_UNSIGNED_BYTE, text); // Draws The Display List Text glPopAttrib(); // Pops The Display List Bits } //Reshape if window size changes void reshape(int reshapeWidth, int reshapeHeight) { glViewport(0, 0,(GLsizei) reshapeWidth, (GLsizei) reshapeHeight); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(0,reshapeWidth,0,reshapeHeight,0,1); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); height = reshapeHeight; width = reshapeWidth; } void initGL() { glShadeModel(GL_SMOOTH); glClearColor (0, 0, 0, 0); // color, in which framebuffer is deleted glClearDepth (1.0f); // value to delete Z-Buffer glEnable (GL_DEPTH_TEST); // Z-Buffer test aktivated glDepthFunc (GL_LEQUAL); // Z-Buffer function (everything behind another poly is covered) glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); //perspective computation of texturen BuildFont(); } //display function void display (void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer glLoadIdentity(); glColor3f(0.0,1.0,1.0); glTranslatef(0.0f,0.0f,-1.0f); glRasterPos2f(0,0); // Position The Text On The Screen glPrint("Hello"); // Print GL Text To The Screen glFlush(); } int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutInitWindowSize(400, 400); glutCreateWindow("MeinText"); initGL(); glutReshapeFunc(reshape); glutDisplayFunc(display); glutMainLoop(); return 0; }
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kannst es kompilieren?
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Ja das klappt, kann es auch ausführen, aber dabei erscheint nur ein schwarzes Fenster.
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Warum gibst Du für die Höhe der Schriftart minus 24 an? Und warum für die Breite null?
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hab im mom sogar prob das zu kompilieren ...
welche glut version benutzt du?
und warum includest du 2mal iostream??
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class_Volrath schrieb:
hab im mom sogar prob das zu kompilieren ...
welche glut version benutzt du?
und warum includest du 2mal iostream??
^
Das riecht doch nach Copy&Paste
BTW würde ich nicht Nehe's Textfunktion mit wglUseFontBitmaps verwenden, weil das sehr langsam und fehleranfällig ist (Texturen, Z-Buffer - Um mal zwei Schlagworte ich den Raum zu werfen).
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Ja, aber das muss doch auch so funktionieren.
<iostream> war n versehn.
bei 0 werden standard werte verwendet, das minus is für character höhe und nicht cell höhe.
Er geht auch durch alle Funktionen, nur die schrift sieht man nich
keine idee?
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Hallo.
Habe bis zum Abwinken auch alles probiert, damit mein Text überhaupt erscheint.
Es scheint so, daß die wgl-Dinger mit ATL aus irgendwelchen Gründen auch immer nicht funzen können ...Also funktioniert weder mit wglUseFontBitmaps() noch mit wglUseFontOutlines().
Ich hoffe jedoch, ich irre mich, weil auch ich das brauche...
Kann jemand bitte helfen ?
// MyControl.h : Declaration of the CMyControl #pragma once #include "resource.h" // main symbols #include <atlctl.h> #include "MyProject.h" // CMyControl class ATL_NO_VTABLE CMyControl : public CComObjectRootEx<CComSingleThreadModel>, public IDispatchImpl<IMyControl, &IID_IMyControl, &LIBID_MyProjectLib, /*wMajor =*/ 1, /*wMinor =*/ 0>, public IPersistStreamInitImpl<CMyControl>, public IOleControlImpl<CMyControl>, public IOleObjectImpl<CMyControl>, public IOleInPlaceActiveObjectImpl<CMyControl>, public IViewObjectExImpl<CMyControl>, public IOleInPlaceObjectWindowlessImpl<CMyControl>, public ISupportErrorInfo, public IPersistStorageImpl<CMyControl>, public ISpecifyPropertyPagesImpl<CMyControl>, public IQuickActivateImpl<CMyControl>, public IDataObjectImpl<CMyControl>, public IProvideClassInfo2Impl<&CLSID_MyControl, NULL, &LIBID_MyProjectLib>, public CComCoClass<CMyControl, &CLSID_MyControl>, public CComControl<CMyControl> { public: CMyControl(): m_uiListBase(0) { m_bWindowOnly = TRUE; } DECLARE_OLEMISC_STATUS(OLEMISC_RECOMPOSEONRESIZE | OLEMISC_CANTLINKINSIDE | OLEMISC_INSIDEOUT | OLEMISC_ACTIVATEWHENVISIBLE | OLEMISC_SETCLIENTSITEFIRST ) DECLARE_REGISTRY_RESOURCEID(IDR_MYCONTROL) BEGIN_COM_MAP(CMyControl) COM_INTERFACE_ENTRY(IMyControl) COM_INTERFACE_ENTRY(IDispatch) COM_INTERFACE_ENTRY(IViewObjectEx) COM_INTERFACE_ENTRY(IViewObject2) COM_INTERFACE_ENTRY(IViewObject) COM_INTERFACE_ENTRY(IOleInPlaceObjectWindowless) COM_INTERFACE_ENTRY(IOleInPlaceObject) COM_INTERFACE_ENTRY2(IOleWindow, IOleInPlaceObjectWindowless) COM_INTERFACE_ENTRY(IOleInPlaceActiveObject) COM_INTERFACE_ENTRY(IOleControl) COM_INTERFACE_ENTRY(IOleObject) COM_INTERFACE_ENTRY(IPersistStreamInit) COM_INTERFACE_ENTRY2(IPersist, IPersistStreamInit) COM_INTERFACE_ENTRY(ISupportErrorInfo) COM_INTERFACE_ENTRY(ISpecifyPropertyPages) COM_INTERFACE_ENTRY(IQuickActivate) COM_INTERFACE_ENTRY(IPersistStorage) COM_INTERFACE_ENTRY(IDataObject) COM_INTERFACE_ENTRY(IProvideClassInfo) COM_INTERFACE_ENTRY(IProvideClassInfo2) END_COM_MAP() BEGIN_PROP_MAP(CMyControl) PROP_DATA_ENTRY("_cx", m_sizeExtent.cx, VT_UI4) PROP_DATA_ENTRY("_cy", m_sizeExtent.cy, VT_UI4) // Example entries // PROP_ENTRY("Property Description", dispid, clsid) // PROP_PAGE(CLSID_StockColorPage) END_PROP_MAP() BEGIN_MSG_MAP(CMyControl) MESSAGE_HANDLER(WM_CREATE, OnCreate) MESSAGE_HANDLER(WM_DESTROY, OnDestroy) MESSAGE_HANDLER(WM_SIZE, OnSize) CHAIN_MSG_MAP(CComControl<CMyControl>) DEFAULT_REFLECTION_HANDLER() END_MSG_MAP() // Handler prototypes: // LRESULT MessageHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled); // LRESULT CommandHandler(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled); // LRESULT NotifyHandler(int idCtrl, LPNMHDR pnmh, BOOL& bHandled); // ISupportsErrorInfo STDMETHOD(InterfaceSupportsErrorInfo)(REFIID riid) { static const IID* arr[] = { &IID_IMyControl, }; for (int i=0; i<sizeof(arr)/sizeof(arr[0]); i++) { if (InlineIsEqualGUID(*arr[i], riid)) return S_OK; } return S_FALSE; } // IViewObjectEx DECLARE_VIEW_STATUS(VIEWSTATUS_SOLIDBKGND | VIEWSTATUS_OPAQUE) // IMyControl public: HRESULT OnDraw(ATL_DRAWINFO& di) { HDC hdc = di.hdcDraw; RECT& rc = *(RECT*)di.prcBounds; wglMakeCurrent(hdc, m_hRC); glClearColor(.6f, .6f, .6f, 10.0f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); #if 0 glPushMatrix(); // compute dimensions of a quarter of the control SIZE qtrSize = { (rc.right - rc.left) / 2, (rc.bottom - rc.top) / 2 }; glBegin(GL_QUADS); glColor3ub(255, 0, 0); glVertex3s(-qtrSize.cx, -qtrSize.cy, 0); glColor3ub(0, 255, 0); glVertex3s(qtrSize.cx, -qtrSize.cy, 0); glColor3ub(0, 0, 255); glVertex3s(qtrSize.cx, qtrSize.cy, 0); glColor3ub(255, 255, 255); glVertex3s(-qtrSize.cx, qtrSize.cy, 0); glEnd(); glPopMatrix(); #endif glColor3f(0.0, 1.0, 1.0); glPointSize(6.0); glBegin(GL_POINTS); glVertex3f(0.0, 0.0, 0.0); glEnd(); glColor3f(1.0, 0.0, 0.0); glListBase(m_uiListBase); // Es funktioniert nicht: //PrintGLText("Test123456"); // Unten funktionieren auch nicht ... : glCallLists (24, GL_UNSIGNED_BYTE, "Hello Win32 OpenGL World"); DWORD dw = GetLastError(); for (int n=32; n < 255; n++) glCallList(n); glPointSize(2.0); glBegin(GL_POINTS); glVertex3f(2.0, 0.0, 0.0); glEnd(); glFinish(); SwapBuffers(wglGetCurrentDC()); return S_OK; } DECLARE_PROTECT_FINAL_CONSTRUCT() HRESULT FinalConstruct() { return S_OK; } void FinalRelease() { } // Set OpenGL pixel format for given DC BOOL SetupPixelFormat(HDC hdc) { static PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd 1, // version number PFD_DRAW_TO_WINDOW | // support window PFD_SUPPORT_OPENGL | // support OpenGL PFD_DOUBLEBUFFER, // double buffered PFD_TYPE_RGBA, // RGBA type 24, // 24-bit 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, // accum bits ignored 32, // 32-bit z-buffer 0, // no stencil buffer 0, // no auxiliary buffer PFD_MAIN_PLANE, // main layer 0, // reserved 0, 0, 0 // layer masks ignored }; int pixelformat; if ((pixelformat = ChoosePixelFormat(hdc, &pfd)) == 0) { ATLASSERT(FALSE); return FALSE; } if (SetPixelFormat(hdc, pixelformat, &pfd) == FALSE) { ATLASSERT(FALSE); return FALSE; } return TRUE; } // Create rendering context given device context and control bounds void CreateContext(HDC hdc, RECT& rc) { PIXELFORMATDESCRIPTOR pfd; if (!SetupPixelFormat(hdc)) return; int n = GetPixelFormat(hdc); DescribePixelFormat(hdc, n, sizeof(pfd), &pfd); m_hRC = wglCreateContext(hdc); wglMakeCurrent(hdc, m_hRC); // OpenGL stuff starts here int width = rc.right - rc.left; int height = rc.bottom - rc.top; glViewport(0, 0, width, height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); //gluOrtho2D(-width/2, width/2, -height/2, height/2); float flMax = 3.0f; glOrtho(-flMax, flMax, -flMax, flMax, -flMax, flMax); glMatrixMode(GL_MODELVIEW); } LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/) { HDC hdc = GetDC(); RECT rc; GetClientRect(&rc); CreateContext(hdc, rc); /******************/ /* Added by hdWin */ /******************/ HDC hDC(NULL); hDC = GetDC(); HFONT hFont (NULL), hOldFont (NULL); // Windows Font ID m_uiListBase = glGenLists(256); // Storage For 256 Characters hFont = CreateFont( -12, // Height Of Font 0, // Width Of Font 0, // Angle Of Escapement 0, // Orientation Angle FW_BOLD, // Font Weight FALSE, // Italic FALSE, // Underline FALSE, // Strikeout ANSI_CHARSET, // Character Set Identifier OUT_TT_PRECIS, // Output Precision CLIP_DEFAULT_PRECIS, // Clipping Precision ANTIALIASED_QUALITY, // Output Quality FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch "Comic Sans MS"); // Font Name hOldFont = (HFONT)SelectObject(hDC, hFont); ZeroMemory(m_gmf, sizeof(m_gmf)); // MSDN: // The wglUseFontOutlines function creates a set of display lists ! //#define FONTOUTLINES #ifdef FONTOUTLINES BOOL bo = wglUseFontOutlines( hDC, // Select The Current DC 0, // Starting Character 256, // Number Of Display Lists To Build m_uiListBase, // Starting Display Lists 0.0f, // Deviation From The True Outlines 0.2f, // Font Thickness In The Z Direction WGL_FONT_POLYGONS, // Use Polygons, Not Lines m_gmf); // Address Of Buffer To Recieve Data #endif #define FONTBITMAPS #ifdef FONTBITMAPS BOOL bo = wglUseFontBitmaps( hDC, 0, 256, m_uiListBase); #endif glCallLists (24, GL_UNSIGNED_BYTE, "Hello Win32 OpenGL World"); DeleteObject(SelectObject(hDC, hOldFont)); ReleaseDC(hDC); hDC = NULL; return 0; } LRESULT OnDestroy(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/) { glDeleteLists(m_uiListBase, 256); // Delete All 256 Characters wglMakeCurrent(NULL, NULL); if (m_hRC) { wglDeleteContext(m_hRC); m_hRC = NULL; } return 0; } LRESULT CMyControl::OnSize(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/) { // when resized, recreate the device context wglMakeCurrent(NULL, NULL); if (m_hRC) { wglDeleteContext(m_hRC); m_hRC = NULL; } HDC hdc = GetDC(); RECT rc; GetClientRect(&rc); CreateContext(hdc, rc); return 0; } void CMyControl::PrintGLText(const char *fmt, ...) // Custom GL "Print" Routine { float length=0; // Used To Find The Length Of The Text char text[256]; // Holds Our String va_list ap; // Pointer To List Of Arguments if (fmt == NULL) // If There's No Text return; // Do Nothing va_start(ap, fmt); // Parses The String For Variables sprintf(text, fmt, ap); // And Converts Symbols To Actual Numbers va_end(ap); // Results Are Stored In Text for (unsigned int loop=0;loop<(strlen(text));loop++) // Loop To Find Text Length { length += m_gmf[text[loop]].gmfCellIncX; // Increase Length By Each Characters Width } // glEnable(GL_CULL_FACE); // glCullFace(GL_FRONT_AND_BACK); // glPushMatrix(); //glTranslatef(-length/2,0.0f,0.0f); // Center Our Text On The Screen const GLubyte* glubyte (NULL); glubyte = gluErrorString(glGetError()); glPushAttrib(GL_LIST_BIT); // Pushes The Display List Bits glListBase(m_uiListBase); // Sets The Base Character to 0 glCallLists((GLsizei)strlen(text), GL_UNSIGNED_BYTE, text); // Draws The Display List Text DWORD dw = GetLastError(); glubyte = gluErrorString(glGetError()); glPopAttrib(); // Pops The Display List Bits // glPopMatrix(); // glDisable(GL_CULL_FACE); } // OpenGL rendering context HGLRC m_hRC; STDMETHOD(RefreshCtrl)(void); /******************/ /* Added by hdWin */ /******************/ GLYPHMETRICSFLOAT m_gmf[256]; // Storage For Information About Our Outline Font Characters GLuint m_uiListBase; }; OBJECT_ENTRY_AUTO(__uuidof(MyControl), CMyControl)