Hi,

I'm trying to figure out how to consolidate drawing these lines into a for-loop in the draw() function.  Basically, I'm trying to animate a bar graph, eg trying to draw each bar from 0 to it's Y value, and then it draws the next bar and so on.  I can manually add each block below, and it works fine to create each line, but it seems better to automate it.  Each line creates a bar/column.

1. float yPos = map(actions[1].presses, minVal, maxVal, height/2, 50);
2. line(lineXpos, actions[1].a, endLineXpos, actions[1].a);
3. actions[1].a = actions[1].a - 2;
4. if (actions[1].a < yPos) { 
5.   actions[1].a = height/2; 
6. }
7. 
   
8. float yPos2 = map(actions[2].presses, minVal, maxVal, height/2, 50);
9. line(lineXpos+10, actions[2].a, endLineXpos+10, actions[2].a);
10. actions[2].a = actions[2].a - 2;
11. if (actions[2].a < yPos2) { 
12.   actions[2].a = height/2; 
13. }
14. 
    
15. float yPos3 = map(actions[3].presses, minVal, maxVal, height/2, 50);
16. ...
17. ...
18. and so on...

It seems like I could consolidate the above into something like this below, but when I run it, it runs endlessly and creates a slope.

1. void draw() {
2.   
3.   for( int j = 1; j < actions.length; j++) {
4.     
5.     actions[j].yPos = map(actions[j].presses, minVal, maxVal, height/2, 50);
6.     
7.     line(actions[j].lineXpos, actions[j].a, actions[j].endLineXpos, actions[j].a);
8.     actions[j].a = actions[j].a - 2; 
9.        
10.     if (actions[j].a < actions[j].yPos) { 
11.       actions[j].a = height/2;
12.       actions[j].lineXpos = actions[j].lineXpos + 10;
13.       actions[j].endLineXpos = actions[j].endLineXpos + 10;
14.     }
15.     
16.   }
17. 
    
18. }

I think the actions[j].yPos gets overwritten each time.  Any ideas what I'm doing wrong?

Thanks!