hello,
i have an OpenSG prj, and i'd like to write a nice logo on the foreground.
If I were in OpenGL i'd write something like:
glPushMatrix();
glViewport (0,0,g_w,g_h);
glMatrixMode (GL_PROJECTION);
glPushMatrix(); //apro la push della matrice di proiezione!!!
glLoadIdentity();
glOrtho(-5, 5, -5, 5, -2, 100);
glMatrixMode (GL_MODELVIEW);
//glViewport (0,0,640,480);
//glDepthMask( GL_FALSE);
glColor3f(1,1,1);
glBegin (GL_QUADS);
glVertex2f(0,0);
glVertex2f(0,50);
glVertex2f(50,50);
glVertex2f(50,0);
glEnd();
glMatrixMode (GL_PROJECTION);
glPopMatrix(); // se tutto va bene qui c'e la projection di OSG
glMatrixMode (GL_MODELVIEW);
glPopMatrix(); // e qui la model view
// glDepthMask( GL_TRUE);
at the end of my main loop, so that before drawing the next frame, my app
just switches to ortho, and renders a GL_QUAD in the upper left screen
corner. (so i am sure that is is always in the right position and facing).
May I do something alike in OSG? How? I tried to put the very same code into
the OpenSG display callback, but nothing happened...
Thx all
T.
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