Question on OpenGL

[ssharish2005]

Hello guys,
I just started learning opengl from past few days, so i dunno much about it. So probably some one out there would help me out in this simple problem which i am facing on co-ordinated, i mean setting the co-ordinates of the screen. Have a look at code below

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

void Init(void);
void Display(void);

int main(int argc, char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(100,100);
    glutCreateWindow("Polygon");
    Init();
    glutDisplayFunc(Display);
    glutMainLoop();
    
    return 0;
}

void Init(void)
{
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glMatrixMode (GL_PROJECTION);
    glLoadIdentity ();
    gluOrtho2D (0.0, 0.0, 0.0, 0.0);
}

void Display(void)
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(1.0, 1.0, 1.0);
    
    glBegin(GL_POLYGON);
      glVertex2f(0.0, 0.0);
      glVertex2f(0.0, 1.0);
      glVertex2f(1.0, 2.0);
      glVertex2f(6.0, 1.0);
      glVertex2f(2.0, 0.0);
   glEnd();
   
   glFlush();
}

i wanted the co-ordinated 0.0 start from the top left of the screen. But by default it starts from the center of the screen which mean what ever i draw its all in the center but i wanted to be on top left of the screen. How do i do that, can any one please guide me in this.

thank you

ssharish2005

[psychopath]

Set gluOrtho2D to the proper dimensions.

[ssharish2005]

Set gluOrtho2D to the proper dimensions.

thank u very much psychopath i changed it to

gluOrtho2D(0, 50, 50,   0);

ssharish2005