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Index › Programming Questions & Help › OpenGL and 3D Libraries › Removing 3D transforms to draw in 2D
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Removing 3D transforms to draw in 2D? (Read 1210 times)
WebDext
Removing 3D transforms to draw in 2D?
Nov 21st, 2006, 10:55pm  
Hey guys, I'm running into a bit of trouble switching back to a 2D drawing mode for displaying high scores in this small web game I'm making, I'm rendering everything in 3D during the game and moving the camera, and I just want to reset the projection/camera etc, so I can use 2D functions and text like they normally should be able to be used if I hadn't used a projection matrix...

Anyways, here's a code snipit that I was currently playing around with to try and just display a list of scores... It just draws white though...

P.S. I can't seem to get the tabs working correctly on this board, =/ fortunately it's not too much code!

 public void DrawScores()
 {
   pushMatrix();
   
   camera();
   ortho(0, width, 0, height, -10, 10);
   
   background(255,255,255);
   image(back,0,0);
   
   for( int i=0; i<25; ++i )
   {
int value =    int(m_scores[i]);
if( value == m_currentScore )
fill(255);
else
fill(0);
text(str(value), 100, 30 + i * 24);
   }
   
   popMatrix();
 }
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JosephDuchesne
Re: Removing 3D transforms to draw in 2D?
Reply #1 - Dec 21st, 2006, 11:36pm  
I use:
Beginning of my code:
import javax.media.opengl.*;

Where I need to draw 2D:
GL gl= ((PGraphicsOpenGL)g).gl;
gl.glDepthFunc(javax.media.opengl.GL.GL_ALWAYS); //turn off Z buffering
camera(); //reset the camera

//Draw 2D stuff here

gl.glDepthFunc(javax.media.opengl.GL.GL_LESS); //turn it back on
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fry
Re: Removing 3D transforms to draw in 2D?
Reply #2 - Dec 22nd, 2006, 3:41pm  
does hint(DISABLE_DEPTH_TEST) not work? that's what it's for, so if not that would be a bug and maybe we should use joseph's method instead.
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