package p5;
import anar.*;




import processing.core.PApplet;

public class Test05btrefoilKnot extends PApplet {

  /*
   * Example for Anar library by Guillaume LaBelle + Julien Nembrini
   * http://anar.ch
   */



  public void setup(){
    size(800,400,OPENGL);
    Anar.init(this);
    Anar.drawAxis();
    
    Anar.add(trefoilknot());
  }

  public Obj trefoilknot(){

    Obj module = new Obj();

    Param radius = new Param(100,0,200).addToSlidersMain();
    Param h1 = new Param(50,-100,100).addToSlidersMain();
    
    Face triangle = new Circle(radius,3).fill(255,20);
    module.add(triangle);
    
    Obj upper = new Obj();
    Obj lower = new Obj();
    
    for(int i=0; i<triangle.numOfPts();i++)
    {
      Pt edge = new PtMid(triangle.pt(i),triangle.ptMod(i+1));
      upper.add(new Pts(edge, Anar.Pt(edge).translateZ(h1)));
      lower.add(new Pts(edge, Anar.Pt(edge).translateZ(h1.inv())));
    }
    
    module.add(upper);
    module.add(lower);
    
    
    Pts knotGuide = new Pts();
    
    for(int i=0; i<triangle.numOfPts();i++)
    {
      knotGuide.add(triangle.pt(i));
      knotGuide.add(upper.lineMod(i+2).pt(1));      
      knotGuide.add(lower.lineMod(i+1).pt(1));      
    }
    
    CSpline knot = new CSpline(knotGuide);
    knot.closedMode = true;
    knot.mode = CSpline.NEXT;
    
    module.add(knot);
    
    //Create Frenet
    Pts keyPoints = knot.discretization(100);
    Param frenetLength = new Param(20,0,50).addToSlidersMain();
    
    for(int i=0; i<keyPoints.numOfPts(); i++)
      module.add(new FrenetFrame(keyPoints.ptMod(i),keyPoints.ptMod(i+1),keyPoints.ptMod(i+2),frenetLength));
    

    return module;
  }


  public void draw(){
    background(155);
    Anar.draw();
  }



  public static void main(String[] args){
    PApplet.main(new String[]{Test05btrefoilKnot.class.getName()});
  }
}