​

function mouseClicked()

{

  background(220,14,139);

  let lines = []

  for (let i = 0; i < linesNum; i++)

  {

    let x1 = random(width);

    let x2 = random(width);

    let y1 = random(height);

    let y2 = random(height);

    strokeWeight(1);

    line(x1,y1,x2,y2);

    lines[i] = x1;

    lines[i + linesNum] = x2;

    lines[i + linesNum*2] = y1;

    lines[i + linesNum*3] = y2;

  }

  for (let lineI = 0; lineI < linesNum; lineI++)

  {

    for (let lineJ = lineI; lineJ < linesNum; lineJ++)

    {

      let x1 = lines[lineI];

      let x2 = lines[lineI + linesNum];

      let y1 = lines[lineI + linesNum*2];

      let y2 = lines[lineI + linesNum*3];

      let a1 = lines[lineJ];

      let a2 = lines[lineJ + linesNum];

      let b1 = lines[lineJ + linesNum*2];

      let b2 = lines[lineJ + linesNum*3];

      let slope1 = (y2-y1)/(x2-x1);

      let slope2 = (b2-b1)/(a2-a1);

      let intersectX = (slope1*x1-y1+b1-slope2*a1)/(slope1-slope2);

      let intersectY = slope1*(intersectX-x1)+y1;

      if (intersectX < max(x1,x2) && intersectX > min(x1,x2) &&

          intersectX < max(a1,a2) && intersectX > min(a1,a2) &&

          intersectY < max(y1,y2) && intersectY > min(y1,y2) &&

          intersectY < max(b1,b2) && intersectY > min(b1,b2))

      {

        strokeWeight(0);

        fill(22,135,141,50);

        circle(intersectX,intersectY,15);

      }

    }

  }

}

​

function setup() 

{

  createCanvas(640, 480);

  mouseClicked();

}

​

function draw() 

{

}