I'm very new to Processing and I'm having trouble trying to rotate my drawing on the Y-axis...

Basically, I'm trying to get the fish to flip over when it gets to the left side of the window.

I have:

2. import processing.opengl.PGraphicsOpenGL;
3. 
   
4. int fishX = 247;
5. int fishY = 138;
6. int x;
7. int changeX = 1;
8. 
   
9. void setup() {
10.   background(231, 253, 255);
11.   size(800, 400, OPENGL);
12.   smooth();
13. }
14. 
    
15. void draw() {
16. 
    
17.   x = x + changeX;
18.   int newWid = width-fishX;
19.   translate (newWid-x, height/2-fishY/2);
20. 
    
21.   
22.   if (x < 0 || x > width-fishX) {
23.     changeX = changeX * -1;
24.     
25.     if (x < 0) {
26.       rotateY(PI);
27.     }
28.     else {
29.       rotateY(0);
30.     }
31.   }
32.   fish(); }

I know it probably isn't the most efficient way to do this... But I just want it to work... T_T

Thank you!

Hello,

I'm pretty new to Processing.. and I just can not get it to run... and I really need this program :(

Please help me out....

I'm trying to run it on a OS 10.6.8 and I've been getting this error:

Thank you!