Hi all,
I am trying to draw an OpenGL quad at the very end of fgRenderFrame in
main.cxx, just before the glutSwapBuffers by doing:
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glDisable( GL_FOG );
glDisable( GL_DEPTH_TEST );
glDisable( GL_LIGHTING );
glDisable( GL_TEXTURE_2D );
glColor3f( 0.9, 0.4, 0.2 );
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex3f(0,0, 0);
glTexCoord2f(1,0);
glVertex3f(1,0, 0);
glTexCoord2f(1,1);
glVertex3f(1,1, 0);
glTexCoord2f(0,1);
glVertex3f(0,1, 0);
glEnd();
glPopMatrix();
This has worked on a few occasions, but not all the time.
What I really want is to be able to draw an overlay in 3D space at the end of
the draw loop. I realise that Flightgear is using plib ssgnode rendering stuff,
but I don't know plib and really only want to hack this in for now.
How can I render some OpenGL prims at the end of the draw loop?
many thanks,
Richard.
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