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my program given some erroe (computer graphics)

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my program given some erroe (computer graphics)

 
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  #1
Mar 24th, 2007
i am just start Computer grahics. that is my first program please help me
c Syntax (Toggle Plain Text) 
  1. #include <GL/glut.h>
  2.  
  3.        void DrawPixels();
  4.        void OurPixelsDrawingFunction();
  5.        void SetView();  
  6.  
  7. void SetView(int w, int h)
  8. {
  9.     glViewport(0,0,w,h);
  10.     glMatrixMode(GL_PROJECTION);
  11.     glLoadIdentity();
  12.     glMatrixMode (GL_MODELVIEW);
  13.     glLoadIdentity();
  14.  
  15.  }
  16.  
  17. void DrawPixels()
  18. {
  19.     glClearColor(1.0,1.0,1.0,0);
  20.  
  21.       glClear(GL_COLOR_BUFFER_BIT);
  22.  
  23.  
  24.  
  25.         glMatrixMode(GL_PROJECTION);
  26.  
  27.       gluOrtho2D (0.0,600.0,0.0,600.0);
  28.  
  29.  
  30.       OurPixelsDrawingFunction();
  31.  
  32.  
  33.  
  34. void OurPixelsDrawingFuntion()
  35. {
  36.     glColor3f(0,1,0);
  37.     /*Set current pixels drwaing color to green*/
  38.     glPointSize(10);
  39.     /* Sets the pixel size to 10 units*/
  40.     glBegin(GL_POINTS);
  41. /* Tells the Open GL that we want to draw points, similarly we can tell OpenGL
  42. that we want to draw lines using GL_LINES and then we will use line drawing
  43. functons.*/
  44.    /*====================================================================*/
  45.    /*   Drawing one horizental line covering full window (0 to 600)      */
  46.    /*   at Y = 100 and x from 0 to 600                                   */
  47.    /*====================================================================*/
  48.    for(int i = 0; i <= 600; i++)
  49.    glVertex2i(i,100);
  50.    /*=========================================================================*/
  51.  
  52.    /*=========================================================================*/
  53.    /* Drawing only one pixel of blue color form zero 
  54.    /*=========================================================================*/
  55.       glColor3f(0,0,1);
  56.       glVertex2i(140,120);
  57.    /*=========================================================================*/
  58.  
  59.    /*=========================================================================*/
  60.    /*   Drawing one Vertical line of four pixels for fourd                    */
  61.    /*=========================================================================*/
  62.          glColor3f(0,1,0);
  63.          glVertex2i(160,120);
  64.          glVertex2i(160,140);
  65.          glVertex2i(160,160);
  66.          glVertex2i(160,180);
  67.    /*=========================================================================*/
  68.  
  69.    /*=========================================================================*/
  70.    /*      Draewing only one pixel of blue color for Zero                     */
  71.    /*=========================================================================*/
  72.       glColor3f(0,0,1);
  73.       glVertex2i(180,120);
  74.    /*=========================================================================*/
  75.    /*=========================================================================*/
  76.    /*      Drawing one Vertical line of Two pixels for two                    */
  77.    /*=========================================================================*/
  78.       glColor3f(0,1,0);
  79.       glVertex2i(200,120);
  80.       glVertex2i(200,140);
  81.    /*=========================================================================*/
  82.  
  83.    /*=========================================================================*/
  84.    /*   Drawing only one Pixel of blue color for zero                         */
  85.  
  86.    /*=========================================================================*/
  87.       glColor3f(0,0,1);
  88.       glVertex2i(220,120);
  89.    /*=========================================================================*/
  90.  
  91.    /*=========================================================================*/
  92.    /*   Drawing only one pexel of blue color for zero                         */
  93.    /*=========================================================================*/
  94.       glColor3f(0,0,1);
  95.       glVertex2i(240,120);
  96.    /*=========================================================================*/
  97.  
  98.    /*=========================================================================*/
  99.    /*   Drawing one Vertical line of two pexels for two                       */
  100.    /*=========================================================================*/
  101.       glColor3f(0,1,0);
  102.       glVertex2i(260,120);
  103.       glVertex2i(260,140);
  104.    /*=========================================================================*/
  105.  
  106.    /*=========================================================================*/
  107.    /*   drawing one Vertical line of five pixels for five                     */
  108.    /*=========================================================================*/
  109.       glColor3f(0,1,0);
  110.       glVertex2i(280,120);
  111.       glVertex2i(280,140);
  112.       glVertex2i(280,160);
  113.       glVertex2i(280,180);
  114.       glVertex2i(280,200);
  115.    /*=========================================================================*/
  116.  
  117.    /*=========================================================================*/
  118.    /*   Drawing only one pexel of blue color for zero
  119.    /*=========================================================================*/
  120.       glColor3f(0,0,1);
  121.       glVertex2i(300,120);
  122.    /*=========================================================================*/
  123.  
  124.    /*=========================================================================*/
  125.    /*   We can use loops if we want to for this purpose as well.*/
  126.    /*=========================================================================*/
  127.       glEnd();
  128.    /* tells Open GL that we have finished drawing pixels*/
  129.  
  130.    /*=========================================================================*/
  131.    /* Writng Text */
  132.    /*=========================================================================*/
  133.  
  134.    /*===========Write your Id=================================================*/ 
  135.  
  136.        glRasterPos2i(140,80);
  137.  
  138.    /* this pixels are wrtien using raster mod see the handouts of Lecture no. 3
  139.    for more details. In this mode we have fexed no. of horizontal and vertical
  140.    lines we can't draw pexels using this mode
  141.    */
  142.  
  143.        char id[12] = "bc040200250";
  144.        int id_count = (int)strlen (id);
  145.        for (int i=0; i < id_count; i++)
  146.        {
  147.               glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, id[i]);
  148.        }
  149.  
  150.        glFlush();
  151.    /* this command out put pexels on the screen without this commmand the pixels 
  152.    will not be displayed to the screen*/
  153.  
  154.    }
  155.  
  156. /*/////////////////////////////////////////////////////////////////////////////
  157.                                                                              //
  158. This is reshape function mean that this function is called whenever we resizw//
  159. our window and in this fuction we are adjusting the contents of our window   //
  160. according to its new size. This function can be used in any graphics program //
  161. and you don't need to understand it thoroughly at this moment,*/             //
  162. /////////////////////////////////////////////////////////////////////////////*/ 
  163.  
  164.  
  165.  
  166.    /*/////////////////////////////////////////////////////////////////////////*/
  167. int main (int argc ,char ** argv)
  168.  
  169.     {
  170.         glutInit(&argc,argv);
  171.         glutInitWindowSize(800,600);
  172.         glutCreateWindow ("-----bc040200250.........Your Name------");
  173.         glutDisplayFunc(DrawPixels);
  174.         glutReshapeFunc(SetView);
  175.         glutMainLoop ();
  176.         return 0;
  177.     }
Last edited by ~s.o.s~; Mar 24th, 2007 at 4:22 pm. Reason: Added code tags, learn to use them.
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Re: my program given some erroe (computer graphics)

 
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  #2
Mar 24th, 2007
Please use [code][/code] tags around your code.
Nobody wants to read a whole mess of unindented code.
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Re: my program given some erroe (computer graphics)

 
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  #3
Mar 24th, 2007
lol that was funny reading all that like that but ya i totally agree with salem
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Re: my program given some erroe (computer graphics)

 
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  #4
Mar 24th, 2007
Some problems with your code...

First of all, what platform are you trying to compile this on? On my Mac, I include GLUT/glut.h (you had included GL/glut.h). Getting the header right removes about 8 errors.

You forgot a closing brace here:
c Syntax (Toggle Plain Text) 
  1. void DrawPixels()
  2. {
  3.     glClearColor(1.0,1.0,1.0,0);
  4.  
  5.       glClear(GL_COLOR_BUFFER_BIT);
  6.  
  7.  
  8.  
  9.         glMatrixMode(GL_PROJECTION);
  10.  
  11.       gluOrtho2D (0.0,600.0,0.0,600.0);
  12.  
  13.  
  14.       OurPixelsDrawingFunction();
  15.  
  16. // need } here
  17.  
  18. // you forgot 'c' in 'Funtion'
  19. void OurPixelsDrawingFuntion()

Finally, to use strlen(), you must #include <cstring>. Anyway, there weren't any bugs in the program, and it ran fine after I made these minor corrections.

And this is in the wrong forum, Game Development is better suited for this...
"Technological progress is like an axe in the hands of a pathological criminal."
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