draw

This is a discussion on draw within the C++ Programming forums, part of the General Programming Boards category; can some explain hot to draw pixels and tell me what header file to use. it would be real cool ...

  1. #1
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    draw

    can some explain hot to draw pixels and tell me what header file to use. it would be real cool if they used code also.
    thanks in advance

  2. #2
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    im usings windows Me and im using dev c++ and for graphics library i dont really have one and it would be cool if you recommend one. i hope that helps!!!!!

  3. #3
    Refugee face_master's Avatar
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    Originally posted by loki_cmr
    im usings windows Me and im using dev c++ and for graphics library i dont really have one and it would be cool if you recommend one. i hope that helps!!!!!
    To draw a pixel, you could use...
    • OpenGL
    • SDL
    • Allgero
    • Others too..

  4. #4
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    alright i downloaded the opengl thing now i would like to know how to where to put the stuff and also how to make a command line that tells the compiler that draw a pixel. please help

  5. #5
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    ok im pretty sure i got open GL already and i think the header files are <GL.h> if not please correct them. also now i all i would like to know is how to draw a pixel in a window and if you can do this tell me how to move it.

    thanks in advance

  6. #6
    Pygmy Monkey ErionD's Avatar
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    Hum, from what i remember, there is a whole bunch of code just to make an OpenGL window, too much to simply tell you, you should go find a tutorial.
    Eh, i... KNEW.. a good site, haven't been programming in years >_<

  7. #7
    Just a Member ammar's Avatar
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    There is this website, if you want to learn openGL:
    http://nehe.gamedev.net

  8. #8
    Spanky devour89's Avatar
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    well maybe look in the example section of dev c++

    it gives you this:

    Code:
    #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, 256, 256,
      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, 0.0f, 1.0f);
              glBegin(GL_TRIANGLES);
              glColor3f( 1.0f, 0.0f, 0.0f ); glVertex2f( 0.0f, 1.0f );
              glColor3f( 0.0f, 1.0f, 0.0f ); glVertex2f( 0.87f, -0.5f );
              glColor3f( 0.0f, 0.0f, 1.0f ); glVertex2f( -0.87f, -0.5f );
              glEnd();
              glPopMatrix();
              SwapBuffers( hDC );
    
              theta += 1.0f;
    
            }
      }
      // 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 );
    }
    Dev C++
    Win XP/2k/98

    I DO NOT TAKE CLASSES I DONT GET HOMEWORK THIS IS NOT A HOMEWORK QUESTION!!!

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