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Index › Programming Questions & Help › Programs › YZ plane Fill
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YZ plane Fill (Read 419 times)
pKlopping
YZ plane Fill
Mar 28th, 2008, 4:57am  
Hey all, I'm having a problem getting my program to work right.

I'm trying to use vectors and create a plane on the Y,Z plane.  I have it working on the XY and XZ plane, but the YZ plane won't Fill at all.

Here's the code I'm using

   //RightFace
   beginShape();
     vertex(120,10,-110);
     vertex(120,10,-10);
     vertex(120,110,-10);
     vertex(120,110,-35);
     bezierVertex(120,110,-35, 120,35,-35, 120,35,-110);
     vertex(120,35,-110);
     vertex(120,10,-110);
   endShape();

and here's a link to the current applet
http://au70server.dyn-o-saur.com/BezierBroke/applet/
with the full code at
http://au70server.dyn-o-saur.com/BezierBroke/applet/BezierBroke.pde


I don't understand why it worked three times, but for that third one it won't fill.


Thank you everyone for any time you put into responding, I really appreciate it.
-Paul
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davbol
Re: YZ plane Fill
Reply #1 - Mar 29th, 2008, 4:53pm  
try replacing the problematic call to bezierVertex with this manual equivalent (or, at least, i *think* i got all the values in the right place to be equiv :D)

Quote:

     for (int i=0; i<=g.bezierDetail; i++) {
       float t = float(i) / float(g.bezierDetail);
       float x = 120f;
       float y = bezierPoint(110f,110f,35f,35f,t);
       float z = bezierPoint(-35f,-35f,-35f,-110f,t);
       vertex(x,y,z);
     }


it seems there might be a problem wtih bezierVertex, somehow generating geometry that's confusing the triangulator.  if the above code works for you, then you should probably post it as a bug to check into.
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WWW  
pKlopping
Re: YZ plane Fill
Reply #2 - Mar 29th, 2008, 8:48pm  
Hey, Thanks, that did work Smiley (even though it didn't make that much sense to me. So did you basically go through and define the entire curve with points?)

I also found that I could just repeat one of the working ones, and translate/rotate it into position. (but it's probably less efficient than your solution)

Thanks again for your help, I'll head over now and submit it as a bug.
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