[info-performer] Embedding OPENGL into Performer through DrawCallback

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From: Rajesh R (rajeshr++at++cair.res.in)
Date: 07/08/2005 04:30:29

Dear Performers,

Is there any structure for embedding opengl Programs in my drawCAllback
function. For Instance

void myCallBack(pfChannel *chan, void *data)
{

        /*First OPENGLPERFORMER commands */
                pfChanClear();
                pfDraw();
        /* then OPENGL COMMANDS */
                glMatrixMode(GL_PROJECTION);
                glLoadIdentity();
                glPerspective(); // or glOrtho
                glMatrixMode(GL_MODELVIEW);
                glLoadIdentity();
                //All drawing Commands
                glutSwapBuffers(); // or glFlush

        or
        vice versa

}

I studied the text.c program. I could not makeout necessity of
adding pfPushState,pfBasicState and pfPopMatrix

Any suggestions please.

Rajesh.R
Virtual Reality
Institute for Robotics and Virtual Reality
c/o Centre for AI and Robotics
Defence Research and Development Organization (DRDO)
Ministry of Defence
Bangalore - 1

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