Hi,

I am a newbie to processing and am having trouble with 3d graphics on it. I might be making some mistake with my code here but I have tried several things and nothing works.
I have comfortably decided to put the blame on processing and so here is my post.

If any of you can comment it will be great.

OS: windows xp sp2
Version of processing: 0.91 beta
Comments: I am using P3D. I realized OPENGL had several issues so I am not using it.

The Problem:
Below is a simple code which is supposed to draw a box and when a user presses any key it should rotate about the X axis by 5 degrees.

The trouble is that the box which rotates is all cropped and broken.

When I first saw this I felt it is because ortho by default is ortho(0,width,0,height,-10,+10). I suspected that the -10 and +10 is causing this, so I added ortho(0,width,0,height,-100,+100) but that simply broke the whole thing - the box simply does not appear.

Is this a problem with my code? or is this a problem with processing? If it is the former please let me know what is wrong here. If it is the latter is there a work around?

This sounds fairly fundamental to me so somebody must have hit this. I searched the database and previous posts but found nothing pertaining to ortho and P3D.

Please help. Thanks in advance.

--- here is my code ---
color black = color(0,0,0);
color white = color(255,255,255);
int X=0;
void setup()
{
size(200, 200, P3D);
background(255,255,255);
lights();
}
void drawAtom(color clr)
{
 pushMatrix();
 // Uncomment stuff below or just ortho line
 // and nothing will showup
 //resetMatrix();
 //ortho(0,200,0,200,-100,100);
 stroke(clr);
 translate(50,50,0);
 rotateX(radians(X));
 translate(25,25,0);
 box(15);
 popMatrix();
}
void draw()
{
}
void keyPressed()
{
 drawAtom(white);
 X = X+5;
 drawAtom(black);
}

Thanks for the response John. I tried moving stuff out of keypressed into draw as you mentioned, but the problem still exists.

I strongly feel this is something to do with the projection.  

Another interesting thing to see is that with with "ortho" it totally vanishes.

Here is what I tried:
void draw()
{
 if (doDraw == true)
 {
   drawAtom(white);
   X = X+5;
   drawAtom(black);
 }
}
void keyPressed()
{
 doDraw=true;
}

void keyReleased()
{
 doDraw=false;  
}