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Index › Programming Questions & Help › Syntax Questions › How to draw a 3D Bčzier (HELP)
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How to draw a 3D Bčzier (HELP) (Read 422 times)
mattjakob
How to draw a 3D Bčzier (HELP)
Apr 29th, 2007, 7:44pm  
Hello.
It's not much I'm using Processing and OpenGL.
For my class project I need to draw some interactive splines flowing in 3D space.
... so I have a few questions Smiley

(0) Can 'Processing' handle such a kind of project (3D and smooth lines)
(1) How do I draw a curved line (bezier) in 3D
(2) How can I create a 3D stroke
(3) How can I make the stroke "flow" along its curved path

I'm not expecting someone will solve all my problems for me, I just need some hints on what could be better... just know these topics will be my major discussions on the next few weeks Cheesy


THANKS
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&&----------------------------------&& aittaM ~ Jakob&&
 
davbol
Re: How to draw a 3D Bčzier (HELP)
Reply #1 - Apr 29th, 2007, 9:45pm  
You could extend the example for bezierPoint(), something along these lines:
Code:

  stroke(0);
  noFill();
  beginShape();
  int steps = 10;
  for (int i = 0; i <= steps; i++) {
    float t = (float)(i) / (float)(steps);
    float x = bezierPoint(-80, 40, -40, 80, t);
    float y = bezierPoint(-70, -50, 90, 70, t);
    float z = bezierPoint(-60, -50, 90, 60, t);
    vertex(x, y, z);
  }  
  endShape();

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