var numLines = 12;

var lines = [];

​

function setup() {

  createCanvas(640, 480);

  background(235, 189, 52)

  boolDoRefresh = true;

}

​

function draw() {

  if (boolDoRefresh) {

    lines = [];

    background(235, 189, 52)

  for (var i = 0; i < numLines; i++){

    storeCoordinate(random(0, width), random(0, height), random(0,width), random(0,height), lines);

  }

​

// to loop through coordinate values

  for (var i = 0; i < lines.length; i++) {

    stroke(255)

    strokeWeight(1);

    line(lines[i].x, lines[i].y, lines[i].x2, lines[i].y2)

    // var intersected = findIntersections(lines)

//     

  }  

    boolDoRefresh = false;

     var intersected = findIntersections(lines)

  }

}

​

function findIntersections(a){

  for (var i = 0; i < a.length; i++) {

    for (var j = i + 1; j < a.length; j++) {

        // if there are intersections

         var xOne = a[i].x

         var yOne = a[i].y

         var xTwo = a[i].x2

         var yTwo = a[i].y2

         var x3 = a[j].x

         var y3 = a[j].y

         var x4 = a[j].x2

         var y4 = a[j].y2

      var ua = ((x4 - x3)*(yOne - y3) - (y4 - y3)*(xOne - x3)) / ((y4 - y3)*(xTwo - xOne) - (x4 - x3)*(yTwo - yOne));

      var ub = ((xTwo - xOne)*(yOne - y3) - (yTwo - yOne)*(xOne - x3))/ ((y4 - y3)*(xTwo - xOne) - (x4 - x3)*(yTwo - yOne));

      if ((ua > 0 && ua < 1) && (ub > 0 && ub < 1 )){

        var intersectedX = int(xOne + ua*(xTwo-xOne));

        var intersectedY = int(yOne + ua*(yTwo-yOne));

      }

      print(intersectedX,intersectedY)

      fill(color(252, 86, 3,50));

      strokeWeight(0);

      ellipse(intersectedX, intersectedY, 10);

​

    }

  }

}

​

function mousePressed() {

  boolDoRefresh = true;

}

​

function storeCoordinate(xVal, yVal, x2Val, y2Val, array) {

    array.push({x: xVal, y: yVal, x2: x2Val, y2: y2Val});

}

​

​