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Index › Programming Questions & Help › Programs › continuously smooth objects
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continuously smooth objects (Read 721 times)
mangtronix
continuously smooth objects
Apr 22nd, 2007, 9:26am  
I want to draw compound curves that are continuously smooth (no sharp angles).  What's the best way to do this?

I want to draw something like this (drawn in Illustrator): http://www.michaelang.com/images/bezier.png

Maybe I can use bezierTangent and set the first control point of the next anchor point to lie along the tangent?

Thanks,
 - mang
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watz
Re: continuously smooth objects
Reply #1 - Apr 27th, 2007, 11:26am  
For two bezier joined curves to be continuous the control points on each side of the joining point must be colinear. An example:

Code:
void setup() {
  size(400,400);
}

void draw() {
  float xD,yD;

  xD=width/2-mouseX;  
  yD=height/2-mouseY;  

  background(200);  
  noFill();
  
  bezier(0,0,
    300,100,
    width/2-xD,height/2-yD,
    width/2,height/2);

  bezier(width/2,height/2,
    width/2+xD,height/2+yD,
    400,300,
    400,400);
}
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marius watz // unlekker // code & form // Generator.x
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mangtronix
Re: continuously smooth objects
Reply #2 - Apr 27th, 2007, 9:09pm  
Awesome, thanks!  (The middle point in that Illustrator screenshot should have given me the hint...)
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