When I try to show text in the overlay using the OpenGL renderer, it does not show up. When I use the P3D renderer it works fine.

Does anyone have any suggestions?

code would go something like this:

g.textMode(PConstants.SCREEN);

g.textFont(font);

g.text("some text", 20, 20);

If you remove the textMode(SCREEN); line it works fine. (at least in 0119)

If you want to emulate the SCREEN mode, you could clear the z-buffer, and reset the camera before doing the text:

Code:

import javax.media.opengl.*;

//...

((PGraphicsOpenGL)g).gl.glClear(GL.GL_DEPTH_BUFFER_BIT);
camera();
perspective();

text(...);
 

you might try calling camera() as suggested, but use hint(DISABLE_DEPTH_TEST) to turn off the z-ordering. not sure if that would work, but it may.

The only way I was able to get it to work, was to essentially position the text in world coordinates in such a way that after the projection they are in the correct position in screen coordinates.

This in combination with clearing the Z-Buffer allowed me to display my text over the 3D scene. This would be much more difficult if you are performing rotations.

I tried to get all this working by using the push and pop matrix stack modifiers, but I'm pretty certain text does not correctly use these functions as far as I can tell.

Since my game is just a half pipe simulator, you just linearly follow the snowboarder down the pipe, and I just needed to display some information in the top left of the screen, so I passed the current z position to the score manager.

My [horribly hacked up] code:

   ((PGraphicsOpenGL)g).gl.glClear(GL.GL_DEPTH_BUFFER_BIT);

   text("Score: " + m_currentScore, -350, -240, z - 2000);
   text("Coins Collected: " + m_coinsCollected, -350, -200, z - 2000);