let tr = 0;

let ω = 1 / 60;

let r = 50;

let rel = 0;

let g = 1 / 6;

let x = 0;

let y = 0;

let l = [];

class dline {

  constructor(x1, y1, x2, y2, c, w) {

    if (w === undefined) {

      w = 1;

    }

    if (c === undefined) {

      c = "black";

    }

    this.x1 = x1;

    this.y1 = y1;

    this.x2 = x2;

    this.y2 = y2;

    this.width = w;

    this.colour = c;

    this.n1 = y1 - y2;

    this.n2 = x2 - x1;

    this.c = -this.n1 * x1 - this.n2 * y1;

    this.length = sqrt(sq(this.n1) + sq(this.n2));

  }

  draw() {

    stroke(this.colour);

    strokeWeight(this.width);

    line(this.x1, this.y1, this.x2, this.y2);

    stroke("black");

    strokeWeight(1);

  }

  dist(x, y) {

    if (

      max(dist(x, y, this.x1, this.y1), dist(x, y, this.x2, this.y2)) >

      this.length

    ) {

      return min(dist(x, y, this.x1, this.y1), dist(x, y, this.x2, this.y2));

    } else {

      return abs(this.n1 * x + this.n2 * y + this.c) / this.length;

    }

  }

}

class dpoly {

  constructor(x, c, w) {

    if (w === undefined) {

      w = 1;

    }

    if (c === undefined) {

      c = "black";

    }

    this.x = x;

    this.width = w;

    this.colour = c;

  }

  draw() {

    stroke(this.colour);

    strokeWeight(this.width);

    for (let i = 0; i < this.x.length - 2; i += 2) {

      line(this.x[i], this.x[i + 1], this.x[i + 2], this.x[i + 3]);

    }

    line(

      this.x[this.x.length - 2],

      this.x[this.x.length - 1],

      this.x[0],

      this.x[1]

    );

    stroke("black");

    strokeWeight(1);

  }

  ldist(l) {

    let d = l.dist(this.x[0], this.x[1]);

    print(d);

    for (let i = 2; i < this.x.length; i += 2) {

      d = min(d, l.dist(this.x[i], this.x[i + 1]));

    }

    return d;

  }

  setCoord(x) {

    this.x = x;

  }

}

​

function setup() {

  createCanvas(400, 400);

  l1 = new dline(100, 100, 100, 400);

  l2 = new dline(300, 100, 300, 400);

  l = [l1, l2];

  //p1=new dpoly([0,0,0,10,10,0,10,10],'blue',1)

  c = createVector(200, 200);

  s = createVector(200, 200);

  v = createVector(0, 0);

}

function touchingLine() {

  for (let i = 0; i < l.length; i++) {

    if (l[i].dist(s.x, s.y) < 4*v.mag() && rel == 2) {

      return i;

    }

  }

  return false;

}

function draw() {

  background(220);

  t++;

  if (rel < 2) {

    c.set(mouseX, mouseY);

    s = p5.Vector.add(c, [r * cos(ω * t), r * sin(ω * t)]);

    line(c.x, c.y, s.x, s.y);

    if (mouseIsPressed == true) {

      t = t / 1.01;

      ω *= 1.01;

      rel = 1;

    } else if (rel == 1) {

      rel = 2;

      v.set([-r * ω * sin(ω * t), r * ω * cos(ω * t)]);

      t = 0;

    }

  } else {

    v.y += g;

    s.add(v);

  }

  if (keyIsDown(32)) {

    t = 0;

    rel = 0;

    ω = 1 / 60;

  }

  circle(s.x, s.y, 10);

  l1.draw();

  l2.draw();

  if (touchingLine()!==false) {

    v.add([-l1.n1*2*abs(v.dot(l1.n1,l1.n2))/v.dot(l1.n1,l1.n2)/l1.length,-l1.n2*2*abs(v.dot(l1.n1,l1.n2))/v.dot(l1.n1,l1.n2)/l1.length]);

    while(touchingLine()!==false){

    s.add(v);

      print(touchingLine());

    }

    //v[1]=tr;

  } else {

    x += mouseX - x;

    y += mouseY - y;

    fill("transparent");

  }

  //p1.setCoord([mouseX,mouseY+50,mouseX-50,mouseY,mouseX,mouseY-50,mouseX+50,mouseY])

  print(l1.class)

}

​