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C/C++ - rendere solida un immagine con le openGL
Forum - C/C++ - rendere solida un immagine con le openGL

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lorenzoscarrone (Normal User)
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Messaggi: 92
Iscritto: 16/11/2011

Segnala al moderatore
Postato alle 16:26
Martedì, 21/02/2012
Questo topic è stato chiuso dal moderatore

disegnando un tetraedro con le openGl e compilando il seguente codice, la figura risultante durante la rotazione risulta traspararente rispetto dei lati chi mi può aiutare? grazie in anticipo.

/**************************
* Includes
*
**************************/

#include <windows.h>
#include <gl/gl.h>


/**************************
* Function Declarations
*
**************************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam);
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC);


/**************************
* WinMain
*
**************************/

int WINAPI WinMain (HINSTANCE hInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpCmdLine,
                    int iCmdShow)
{
    WNDCLASS wc;
    HWND hWnd;
    HDC hDC;
    HGLRC hRC;        
    MSG msg;
    BOOL bQuit = FALSE;
    float theta = 0.0f;

    /* register window class */
    wc.style = CS_OWNDC;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor (NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "GLSample";
    RegisterClass (&wc);

    /* create main window */
    hWnd = CreateWindow (
      "GLSample", "OpenGL Sample",
      WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE,
      0, 0, 500, 500,
      NULL, NULL, hInstance, NULL);

    /* enable OpenGL for the window */
    EnableOpenGL (hWnd, &hDC, &hRC);

    /* program main loop */
    while (!bQuit)
    {
        /* check for messages */
        if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
        {
            /* handle or dispatch messages */
            if (msg.message == WM_QUIT)
            {
                bQuit = TRUE;
            }
            else
            {
                TranslateMessage (&msg);
                DispatchMessage (&msg);
            }
        }
        else
        {
            /* OpenGL animation code goes here */

            glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
            glClear (GL_COLOR_BUFFER_BIT);

            glPushMatrix ();
            glRotatef (theta, 0.0f, theta, 0.0f);
            glBegin (GL_TRIANGLES);
            
            glColor3f (1.0f, 0.0f, 0.0f);   glVertex3f ( 0.0f,  0.0f,  1.0f);
            glColor3f (0.0f, 1.0f, 0.0f);   glVertex3f ( 0.8f,  0.0f, -0.5f);
            glColor3f (0.0f, 0.0f, 1.0f);   glVertex3f (-0.8f,  0.0f, -0.5f);
            
            glColor3f (1.0f, 0.0f, 1.0f);   glVertex3f ( 0.0f,  0.0f,  1.0f);
            glColor3f (0.0f, 1.0f, 0.0f);   glVertex3f ( 0.8f,  0.0f, -0.5f);
            glColor3f (1.0f, 0.0f, 1.0f);   glVertex3f ( 0.0f,  0.8f,  0.0f);
            
            glColor3f (0.0f, 1.0f, 0.0f);   glVertex3f ( 0.8f,  0.0f, -0.5f);
            glColor3f (0.0f, 1.0f, 1.0f);   glVertex3f (-0.8f,  0.0f, -0.5f);
            glColor3f (1.0f, 1.0f, 0.0f);   glVertex3f ( 0.0f,  0.8f,  0.0f);
            
            glColor3f (1.0f, 0.0f, 0.0f);   glVertex3f ( 0.0f,  0.8f,  0.0f);
            glColor3f (0.0f, 1.0f, 1.0f);   glVertex3f (-0.8f,  0.0f, -0.5f);
            glColor3f (1.0f, 0.0f, 1.0f);   glVertex3f ( 0.0f,  0.0f,  1.0f);
                        
            glColor3f (0.0f, 1.0f, 0.0f);   glVertex3f ( 0.8f,  0.0f, -0.5f);
            glColor3f (0.0f, 1.0f, 1.0f);   glVertex3f (-0.8f,  0.0f, -0.5f);
            glColor3f (1.0f, 1.0f, 0.0f);   glVertex3f ( 0.0f, -0.8f,  0.0f);
            
            glColor3f (1.0f, 0.0f, 0.0f);   glVertex3f ( 0.0f, -0.8f,  0.0f);
            glColor3f (0.0f, 1.0f, 1.0f);   glVertex3f (-0.8f,  0.0f, -0.5f);
            glColor3f (1.0f, 0.0f, 1.0f);   glVertex3f ( 0.0f,  0.0f,  1.0f);
            glEnd ();
            glPopMatrix ();

            SwapBuffers (hDC);

            theta = theta+1.0f;
            Sleep (1);
        }
    }

    /* shutdown OpenGL */
    DisableOpenGL (hWnd, hDC, hRC);

    /* destroy the window explicitly */
    DestroyWindow (hWnd);

    return msg.wParam;
}


/********************
* Window Procedure
*
********************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
                          WPARAM wParam, LPARAM lParam)
{

    switch (message)
    {
    case WM_CREATE:
        return 0;
    case WM_CLOSE:
        PostQuitMessage (0);
        return 0;

    case WM_DESTROY:
        return 0;

    case WM_KEYDOWN:
        switch (wParam)
        {
        case VK_ESCAPE:
            PostQuitMessage(0);
            return 0;
        }
        return 0;

    default:
        return DefWindowProc (hWnd, message, wParam, lParam);
    }
}


/*******************
* Enable OpenGL
*
*******************/

void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC)
{
    PIXELFORMATDESCRIPTOR pfd;
    int iFormat;

    /* get the device context (DC) */
    *hDC = GetDC (hWnd);

    /* set the pixel format for the DC */
    ZeroMemory (&pfd, sizeof (pfd));
    pfd.nSize = sizeof (pfd);
    pfd.nVersion = 1;
    pfd.dwFlags = PFD_DRAW_TO_WINDOW |
      PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
    pfd.iPixelType = PFD_TYPE_RGBA;
    pfd.cColorBits = 24;
    pfd.cDepthBits = 16;
    pfd.iLayerType = PFD_MAIN_PLANE;
    iFormat = ChoosePixelFormat (*hDC, &pfd);
    SetPixelFormat (*hDC, iFormat, &pfd);

    /* create and enable the render context (RC) */
    *hRC = wglCreateContext( *hDC );
    wglMakeCurrent( *hDC, *hRC );

}


/******************
* Disable OpenGL
*
******************/

void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC)
{
    wglMakeCurrent (NULL, NULL);
    wglDeleteContext (hRC);
    ReleaseDC (hWnd, hDC);
}


<<Quando fai le cose per bene, nessuno sospetterà che tu abbia fatto realmente qualcosa>> Futurama
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HeDo (Founder Member)
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Messaggi: 2763
Iscritto: 21/09/2007

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Segnala al moderatore
Postato alle 20:44
Martedì, 21/02/2012
Questo topic è in violazione di una o più norme del regolamento: http://www.pierotofy.it/pages/extras/forum/9/3839-regolame ... .
    
Dopo averlo letto riapri un nuovo topic assicurandoti di aver rispettato le regole. Grazie per la tua pazienza.


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