pls help me in the openGL redbook - I use XP, MSDEVC++.........

why does the following code doesnt compile in MSVC++ 6. I copy the code from chapter01 in the openGL redbook pls reply..... IM NEW HERE!

Code:

---

#include <GL/gl.h>
#include <GL/glut.h>

void display(void)
{
/*  clear all pixels  */
    glClear (GL_COLOR_BUFFER_BIT);

/*  draw white polygon (rectangle) with corners at
 *  (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0) 
 */
    glColor3f (1.0, 1.0, 1.0);
    glBegin(GL_POLYGON);
        glVertex3f (0.25, 0.25, 0.0);
        glVertex3f (0.75, 0.25, 0.0);
        glVertex3f (0.75, 0.75, 0.0);
        glVertex3f (0.25, 0.75, 0.0);
    glEnd();

/*  don't wait! 
 *  start processing buffered OpenGL routines
 */
    glFlush ();
}

void init (void)
{
/*  select clearing (background) color      */
    glClearColor (0.0, 0.0, 0.0, 0.0);

/*  initialize viewing values  */
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
}

/*
 *  Declare initial window size, position, and display mode
 *  (single buffer and RGBA).  Open window with "hello"
 *  in its title bar.  Call initialization routines.
 *  Register callback function to display graphics.
 *  Enter main loop and process events.
 */
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize (250, 250);
    glutInitWindowPosition (100, 100);
    glutCreateWindow ("hello");
    init ();
    glutDisplayFunc(display);
    glutMainLoop();
    return 0;  /* ISO C requires main to return int. */
}

---

Since you've given us no information as to what the actuals errors are I will have to make an educated guess as to what the problem is. Try adding the following code to the top of your program above the GL includes.

Code:

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#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "glut32.lib")

---

Include the windows header and link to the appropriate libraries. You can alternatively link to these libraries by altering the project settings.

I'm going to guess that you don't have GLUT installed. I'm also going to guess that you don't have a clue what you are doing and that is why you are copy + pasting code into your compiler and hoping that you will magically know how to use OpenGL after that.

I'm going to guess you didnt go to the project settings, and add the appropriate dll's to the link list.

Quote:

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Originally Posted by sand_man

I'm going to guess that you don't have GLUT installed. I'm also going to guess that you don't have a clue what you are doing and that is why you are copy + pasting code into your compiler and hoping that you will magically know how to use OpenGL after that.

---

the number of errors increase to 18errors
i put glut.h in c:\progra~1\microsoft visual studio\vc98\include\gl
i put glut32.gll in c:\windows\system32
i put glut32.dll c:\progra~1\microsoft visual studio\vc98\lib

and still have the errors

yeah before i learn the code i must run it first thats me and you dont care at all im here just to solve my problem!

I dont need a values educator! or whatever you are I DONT NEED YOU!

You might have to add glut32.dll to your project. It doesn't help if it's in the right directory, the linker has to know to look for it. Or is that only for lib files?