OpenGL overwrite example?

New Message Reply Date view Thread view Subject view Author view

Jan Barglowski (jan++at++archimedes.vislab.navy.mil)
Tue, 18 Jun 1996 16:32:40 -0700 (PDT)

I'm trying to simulate a HUD by using OpenGL commands in a post_draw
function. Problem is, I've found a few GL ways of doing this, but it doesn't
seem to work with OpenGL at all. Here's my code:

---
/* Open GL commands. */
gluOrtho2D(-640.0, 640.0, -512.0, 512.0);
glMatrixMode(GL_MODELVIEW);
pfPushIdentMatrix();
pfPushState();
pfBasicState();
pfDisable(PFEN_TEXTURE);
pfDisable(PFEN_LIGHTING);
pfDisable(PFEN_FOG);


/* This works. */
/*
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
*/


/* Draw a red box in the middle of the screen. */
glColor3f(1.0, 0.0, 0.0);
glBegin(GL_POLYGON);
  glVertex2f(-10.0, 10.0);
  glVertex2f(10.0, 10.0);
  glVertex2f(10.0, -10.0);
  glVertex2f(-10.0, -10.0);
glEnd();
glFlush();


/* Return original state. */
pfPopState();
pfPopMatrix();

---


Any pointers or (correct) code examples would be appreciated!  Also, any way
to display text in OpenGL?  My OpenGL book has no examples of this :-(


Thank you,


jan



-- 
Jan Anthony Barglowski	              jan++at++vislab.navy.mil
Animation & Computer Graphics         http://www1.ridgecrest.ca.us/~jan
Naval Air Warfare Center, China Lake  (619) 927-1057
=======================================================================
List Archives, FAQ, FTP:  http://www.sgi.com/Technology/Performer.html
            Submissions:  info-performer++at++sgi.com
        Admin. requests:  info-performer-request++at++sgi.com















New Message
Reply
Date view
Thread view
Subject view
Author view











This archive was generated by hypermail 2.0b2 
on Mon Aug 10 1998 - 17:53:01 PDT





This message has been cleansed for anti-spam protection.  Replace '++at++' in any mail addresses with the '@' symbol.