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Viewports
April 11, 2003 11:39 PM
If you have more than one viewport set up on the screen...can you have different viewing methods on both of them? I have a 3d scene but I would like to add a 2d area just for a menu sort of thing with buttons and stuff. My idea was to set up different viewports, but I can''t figure out how to have different settings on them. They seem to be the same. When I change one, the other changes. ugh. Thanks in advance.
432
April 12, 2003 05:41 AM
first render your scene, then use glOrtho/gluOrtho2D, to change to orthographic projection and render the menu...
April 12, 2003 09:12 AM
any idea what''s wrong with this? The polygon I try to draw at the end isn''t showing up:
glViewport( 0, 100, 500, 400 ); glMatrixMode( GL_PROJECTION ); glPushMatrix(); glEnable(GL_TEXTURE_2D); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); glEnable(GL_LIGHTING); glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); /*clear the window */ glMatrixMode(GL_MODELVIEW); glLoadIdentity(); //gluLookAt(4,2,4,0,0,0,0,1,0); gluLookAt(0,0,10,0,0,0,0,1,0); //calculate rho, theta, and phi cir_x = cir_r * sin(cir_t) * cos(cir_p); cir_y = cir_r * sin(cir_t) * sin(cir_p); cir_z = cir_r * cos(cir_t); //----------------------------- //(re)set light position light_position[0] = cir_x; //set x coord light_position[1] = cir_y; //set y coord light_position[2] = cir_z; //set z coord //---------------------- glLightfv(GL_LIGHT0, GL_POSITION, light_position); drawCube(depth); //draw cube glDisable(GL_LIGHTING); //disable lighting to draw the buttons glViewport( 0, 0, 500, 100 ); gluOrtho2D(0.0, (GLdouble)500, 0.0, (GLdouble)100); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glColor3f(1,0,0); glBegin(GL_POLYGON); glVertex2i(200, 30); glVertex2i(400, 70); glEnd(); glutSwapBuffers(); /* clear buffers */[/source April 12, 2003 11:57 AM
Nevermind, I figured it out 
Thanks James. I thought I''d never get it working.
Thanks James. I thought I''d never get it working.
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