/* ———————————————– /* Author : Vincent Garreau - vincentgarreau.com /* MIT license: opensource.org/licenses/MIT /* Demo / Generator : vincentgarreau.com/particles.js /* GitHub : github.com/VincentGarreau/particles.js /* How to use? : Check the GitHub README /* v2.0.0 /* ———————————————– */

var pJS = function(tag_id, params){

var canvas_el = document.querySelector('#'+tag_id+' > .particles-js-canvas-el');

/* particles.js variables with default values */
this.pJS = {
  canvas: {
    el: canvas_el,
    w: canvas_el.offsetWidth,
    h: canvas_el.offsetHeight
  },
  particles: {
    number: {
      value: 400,
      density: {
        enable: true,
        value_area: 800
      }
    },
    color: {
      value: '#fff'
    },
    shape: {
      type: 'circle',
      stroke: {
        width: 0,
        color: '#ff0000'
      },
      polygon: {
        nb_sides: 5
      },
      image: {
        src: '',
        width: 100,
        height: 100
      }
    },
    opacity: {
      value: 1,
      random: false,
      anim: {
        enable: false,
        speed: 2,
        opacity_min: 0,
        sync: false
      }
    },
    size: {
      value: 20,
      random: false,
      anim: {
        enable: false,
        speed: 20,
        size_min: 0,
        sync: false
      }
    },
    line_linked: {
      enable: true,
      distance: 100,
      color: '#fff',
      opacity: 1,
      width: 1
    },
    move: {
      enable: true,
      speed: 2,
      direction: 'none',
      random: false,
      straight: false,
      out_mode: 'out',
      bounce: false,
      attract: {
        enable: false,
        rotateX: 3000,
        rotateY: 3000
      }
    },
    array: []
  },
  interactivity: {
    detect_on: 'canvas',
    events: {
      onhover: {
        enable: true,
        mode: 'grab'
      },
      onclick: {
        enable: true,
        mode: 'push'
      },
      resize: true
    },
    modes: {
      grab:{
        distance: 100,
        line_linked:{
          opacity: 1
        }
      },
      bubble:{
        distance: 200,
        size: 80,
        duration: 0.4
      },
      repulse:{
        distance: 200,
        duration: 0.4
      },
      push:{
        particles_nb: 4
      },
      remove:{
        particles_nb: 2
      }
    },
    mouse:{}
  },
  retina_detect: false,
  fn: {
    interact: {},
    modes: {},
    vendors:{}
  },
  tmp: {}
};

var pJS = this.pJS;

/* params settings */
if(params){
  Object.deepExtend(pJS, params);
}

pJS.tmp.obj = {
  size_value: pJS.particles.size.value,
  size_anim_speed: pJS.particles.size.anim.speed,
  move_speed: pJS.particles.move.speed,
  line_linked_distance: pJS.particles.line_linked.distance,
  line_linked_width: pJS.particles.line_linked.width,
  mode_grab_distance: pJS.interactivity.modes.grab.distance,
  mode_bubble_distance: pJS.interactivity.modes.bubble.distance,
  mode_bubble_size: pJS.interactivity.modes.bubble.size,
  mode_repulse_distance: pJS.interactivity.modes.repulse.distance
};

pJS.fn.retinaInit = function(){

  if(pJS.retina_detect && window.devicePixelRatio > 1){
    pJS.canvas.pxratio = window.devicePixelRatio;
    pJS.tmp.retina = true;
  }
  else{
    pJS.canvas.pxratio = 1;
    pJS.tmp.retina = false;
  }

  pJS.canvas.w = pJS.canvas.el.offsetWidth * pJS.canvas.pxratio;
  pJS.canvas.h = pJS.canvas.el.offsetHeight * pJS.canvas.pxratio;

  pJS.particles.size.value = pJS.tmp.obj.size_value * pJS.canvas.pxratio;
  pJS.particles.size.anim.speed = pJS.tmp.obj.size_anim_speed * pJS.canvas.pxratio;
  pJS.particles.move.speed = pJS.tmp.obj.move_speed * pJS.canvas.pxratio;
  pJS.particles.line_linked.distance = pJS.tmp.obj.line_linked_distance * pJS.canvas.pxratio;
  pJS.interactivity.modes.grab.distance = pJS.tmp.obj.mode_grab_distance * pJS.canvas.pxratio;
  pJS.interactivity.modes.bubble.distance = pJS.tmp.obj.mode_bubble_distance * pJS.canvas.pxratio;
  pJS.particles.line_linked.width = pJS.tmp.obj.line_linked_width * pJS.canvas.pxratio;
  pJS.interactivity.modes.bubble.size = pJS.tmp.obj.mode_bubble_size * pJS.canvas.pxratio;
  pJS.interactivity.modes.repulse.distance = pJS.tmp.obj.mode_repulse_distance * pJS.canvas.pxratio;

};

/* ---------- pJS functions - canvas ------------ */

pJS.fn.canvasInit = function(){
  pJS.canvas.ctx = pJS.canvas.el.getContext('2d');
};

pJS.fn.canvasSize = function(){

  pJS.canvas.el.width = pJS.canvas.w;
  pJS.canvas.el.height = pJS.canvas.h;

  if(pJS && pJS.interactivity.events.resize){

    window.addEventListener('resize', function(){

        pJS.canvas.w = pJS.canvas.el.offsetWidth;
        pJS.canvas.h = pJS.canvas.el.offsetHeight;

        /* resize canvas */
        if(pJS.tmp.retina){
          pJS.canvas.w *= pJS.canvas.pxratio;
          pJS.canvas.h *= pJS.canvas.pxratio;
        }

        pJS.canvas.el.width = pJS.canvas.w;
        pJS.canvas.el.height = pJS.canvas.h;

        /* repaint canvas on anim disabled */
        if(!pJS.particles.move.enable){
          pJS.fn.particlesEmpty();
          pJS.fn.particlesCreate();
          pJS.fn.particlesDraw();
          pJS.fn.vendors.densityAutoParticles();
        }

      /* density particles enabled */
      pJS.fn.vendors.densityAutoParticles();

    });

  }

};

pJS.fn.canvasPaint = function(){
  pJS.canvas.ctx.fillRect(0, 0, pJS.canvas.w, pJS.canvas.h);
};

pJS.fn.canvasClear = function(){
  pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);
};

/* --------- pJS functions - particles ----------- */

pJS.fn.particle = function(color, opacity, position){

  /* size */
  this.radius = (pJS.particles.size.random ? Math.random() : 1) * pJS.particles.size.value;
  if(pJS.particles.size.anim.enable){
    this.size_status = false;
    this.vs = pJS.particles.size.anim.speed / 100;
    if(!pJS.particles.size.anim.sync){
      this.vs = this.vs * Math.random();
    }
  }

  /* position */
  this.x = position ? position.x : Math.random() * pJS.canvas.w;
  this.y = position ? position.y : Math.random() * pJS.canvas.h;

  /* check position  - into the canvas */
  if(this.x > pJS.canvas.w - this.radius*2) this.x = this.x - this.radius;
  else if(this.x < this.radius*2) this.x = this.x + this.radius;
  if(this.y > pJS.canvas.h - this.radius*2) this.y = this.y - this.radius;
  else if(this.y < this.radius*2) this.y = this.y + this.radius;

  /* check position - avoid overlap */
  if(pJS.particles.move.bounce){
    pJS.fn.vendors.checkOverlap(this, position);
  }

  /* color */
  this.color = {};
  if(typeof(color.value) == 'object'){

    if(color.value instanceof Array){
      var color_selected = color.value[Math.floor(Math.random() * pJS.particles.color.value.length)];
      this.color.rgb = hexToRgb(color_selected);
    }else{
      if(color.value.r != undefined && color.value.g != undefined && color.value.b != undefined){
        this.color.rgb = {
          r: color.value.r,
          g: color.value.g,
          b: color.value.b
        }
      }
      if(color.value.h != undefined && color.value.s != undefined && color.value.l != undefined){
        this.color.hsl = {
          h: color.value.h,
          s: color.value.s,
          l: color.value.l
        }
      }
    }

  }
  else if(color.value == 'random'){
    this.color.rgb = {
      r: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
      g: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
      b: (Math.floor(Math.random() * (255 - 0 + 1)) + 0)
    }
  }
  else if(typeof(color.value) == 'string'){
    this.color = color;
    this.color.rgb = hexToRgb(this.color.value);
  }

  /* opacity */
  this.opacity = (pJS.particles.opacity.random ? Math.random() : 1) * pJS.particles.opacity.value;
  if(pJS.particles.opacity.anim.enable){
    this.opacity_status = false;
    this.vo = pJS.particles.opacity.anim.speed / 100;
    if(!pJS.particles.opacity.anim.sync){
      this.vo = this.vo * Math.random();
    }
  }

  /* animation - velocity for speed */
  var velbase = {}
  switch(pJS.particles.move.direction){
    case 'top':
      velbase = { x:0, y:-1 };
    break;
    case 'top-right':
      velbase = { x:0.5, y:-0.5 };
    break;
    case 'right':
      velbase = { x:1, y:-0 };
    break;
    case 'bottom-right':
      velbase = { x:0.5, y:0.5 };
    break;
    case 'bottom':
      velbase = { x:0, y:1 };
    break;
    case 'bottom-left':
      velbase = { x:-0.5, y:1 };
    break;
    case 'left':
      velbase = { x:-1, y:0 };
    break;
    case 'top-left':
      velbase = { x:-0.5, y:-0.5 };
    break;
    default:
      velbase = { x:0, y:0 };
    break;
  }

  if(pJS.particles.move.straight){
    this.vx = velbase.x;
    this.vy = velbase.y;
    if(pJS.particles.move.random){
      this.vx = this.vx * (Math.random());
      this.vy = this.vy * (Math.random());
    }
  }else{
    this.vx = velbase.x + Math.random()-0.5;
    this.vy = velbase.y + Math.random()-0.5;
  }

  // var theta = 2.0 * Math.PI * Math.random();
  // this.vx = Math.cos(theta);
  // this.vy = Math.sin(theta);

  this.vx_i = this.vx;
  this.vy_i = this.vy;

  /* if shape is image */

  var shape_type = pJS.particles.shape.type;
  if(typeof(shape_type) == 'object'){
    if(shape_type instanceof Array){
      var shape_selected = shape_type[Math.floor(Math.random() * shape_type.length)];
      this.shape = shape_selected;
    }
  }else{
    this.shape = shape_type;
  }

  if(this.shape == 'image'){
    var sh = pJS.particles.shape;
    this.img = {
      src: sh.image.src,
      ratio: sh.image.width / sh.image.height
    }
    if(!this.img.ratio) this.img.ratio = 1;
    if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg != undefined){
      pJS.fn.vendors.createSvgImg(this);
      if(pJS.tmp.pushing){
        this.img.loaded = false;
      }
    }
  }

};

pJS.fn.particle.prototype.draw = function() {

  var p = this;

  if(p.radius_bubble != undefined){
    var radius = p.radius_bubble;
  }else{
    var radius = p.radius;
  }

  if(p.opacity_bubble != undefined){
    var opacity = p.opacity_bubble;
  }else{
    var opacity = p.opacity;
  }

  if(p.color.rgb){
    var color_value = 'rgba('+p.color.rgb.r+','+p.color.rgb.g+','+p.color.rgb.b+','+opacity+')';
  }else{
    var color_value = 'hsla('+p.color.hsl.h+','+p.color.hsl.s+'%,'+p.color.hsl.l+'%,'+opacity+')';
  }

  pJS.canvas.ctx.fillStyle = color_value;
  pJS.canvas.ctx.beginPath();

  switch(p.shape){

    case 'circle':
      pJS.canvas.ctx.arc(p.x, p.y, radius, 0, Math.PI * 2, false);
    break;

    case 'edge':
      pJS.canvas.ctx.rect(p.x-radius, p.y-radius, radius*2, radius*2);
    break;

    case 'triangle':
      pJS.fn.vendors.drawShape(pJS.canvas.ctx, p.x-radius, p.y+radius / 1.66, radius*2, 3, 2);
    break;

    case 'polygon':
      pJS.fn.vendors.drawShape(
        pJS.canvas.ctx,
        p.x - radius / (pJS.particles.shape.polygon.nb_sides/3.5), // startX
        p.y - radius / (2.66/3.5), // startY
        radius*2.66 / (pJS.particles.shape.polygon.nb_sides/3), // sideLength
        pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
        1 // sideCountDenominator
      );
    break;

    case 'star':
      pJS.fn.vendors.drawShape(
        pJS.canvas.ctx,
        p.x - radius*2 / (pJS.particles.shape.polygon.nb_sides/4), // startX
        p.y - radius / (2*2.66/3.5), // startY
        radius*2*2.66 / (pJS.particles.shape.polygon.nb_sides/3), // sideLength
        pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
        2 // sideCountDenominator
      );
    break;

    case 'image':

      function draw(){
        pJS.canvas.ctx.drawImage(
          img_obj,
          p.x-radius,
          p.y-radius,
          radius*2,
          radius*2 / p.img.ratio
        );
      }

      if(pJS.tmp.img_type == 'svg'){
        var img_obj = p.img.obj;
      }else{
        var img_obj = pJS.tmp.img_obj;
      }

      if(img_obj){
        draw();
      }

    break;

  }

  pJS.canvas.ctx.closePath();

  if(pJS.particles.shape.stroke.width > 0){
    pJS.canvas.ctx.strokeStyle = pJS.particles.shape.stroke.color;
    pJS.canvas.ctx.lineWidth = pJS.particles.shape.stroke.width;
    pJS.canvas.ctx.stroke();
  }

  pJS.canvas.ctx.fill();

};

pJS.fn.particlesCreate = function(){
  for(var i = 0; i < pJS.particles.number.value; i++) {
    pJS.particles.array.push(new pJS.fn.particle(pJS.particles.color, pJS.particles.opacity.value));
  }
};

pJS.fn.particlesUpdate = function(){

  for(var i = 0; i < pJS.particles.array.length; i++){

    /* the particle */
    var p = pJS.particles.array[i];

    // var d = ( dx = pJS.interactivity.mouse.click_pos_x - p.x ) * dx + ( dy = pJS.interactivity.mouse.click_pos_y - p.y ) * dy;
    // var f = -BANG_SIZE / d;
    // if ( d < BANG_SIZE ) {
    //     var t = Math.atan2( dy, dx );
    //     p.vx = f * Math.cos(t);
    //     p.vy = f * Math.sin(t);
    // }

    /* move the particle */
    if(pJS.particles.move.enable){
      var ms = pJS.particles.move.speed/2;
      p.x += p.vx * ms;
      p.y += p.vy * ms;
    }

    /* change opacity status */
    if(pJS.particles.opacity.anim.enable) {
      if(p.opacity_status == true) {
        if(p.opacity >= pJS.particles.opacity.value) p.opacity_status = false;
        p.opacity += p.vo;
      }else {
        if(p.opacity <= pJS.particles.opacity.anim.opacity_min) p.opacity_status = true;
        p.opacity -= p.vo;
      }
      if(p.opacity < 0) p.opacity = 0;
    }

    /* change size */
    if(pJS.particles.size.anim.enable){
      if(p.size_status == true){
        if(p.radius >= pJS.particles.size.value) p.size_status = false;
        p.radius += p.vs;
      }else{
        if(p.radius <= pJS.particles.size.anim.size_min) p.size_status = true;
        p.radius -= p.vs;
      }
      if(p.radius < 0) p.radius = 0;
    }

    /* change particle position if it is out of canvas */
    if(pJS.particles.move.out_mode == 'bounce'){
      var new_pos = {
        x_left: p.radius,
        x_right:  pJS.canvas.w,
        y_top: p.radius,
        y_bottom: pJS.canvas.h
      }
    }else{
      var new_pos = {
        x_left: -p.radius,
        x_right: pJS.canvas.w + p.radius,
        y_top: -p.radius,
        y_bottom: pJS.canvas.h + p.radius
      }
    }

    if(p.x - p.radius > pJS.canvas.w){
      p.x = new_pos.x_left;
      p.y = Math.random() * pJS.canvas.h;
    }
    else if(p.x + p.radius < 0){
      p.x = new_pos.x_right;
      p.y = Math.random() * pJS.canvas.h;
    }
    if(p.y - p.radius > pJS.canvas.h){
      p.y = new_pos.y_top;
      p.x = Math.random() * pJS.canvas.w;
    }
    else if(p.y + p.radius < 0){
      p.y = new_pos.y_bottom;
      p.x = Math.random() * pJS.canvas.w;
    }

    /* out of canvas modes */
    switch(pJS.particles.move.out_mode){
      case 'bounce':
        if (p.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
        else if (p.x - p.radius < 0) p.vx = -p.vx;
        if (p.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
        else if (p.y - p.radius < 0) p.vy = -p.vy;
      break;
    }

    /* events */
    if(isInArray('grab', pJS.interactivity.events.onhover.mode)){
      pJS.fn.modes.grabParticle(p);
    }

    if(isInArray('bubble', pJS.interactivity.events.onhover.mode) || isInArray('bubble', pJS.interactivity.events.onclick.mode)){
      pJS.fn.modes.bubbleParticle(p);
    }

    if(isInArray('repulse', pJS.interactivity.events.onhover.mode) || isInArray('repulse', pJS.interactivity.events.onclick.mode)){
      pJS.fn.modes.repulseParticle(p);
    }

    /* interaction auto between particles */
    if(pJS.particles.line_linked.enable || pJS.particles.move.attract.enable){
      for(var j = i + 1; j < pJS.particles.array.length; j++){
        var p2 = pJS.particles.array[j];

        /* link particles */
        if(pJS.particles.line_linked.enable){
          pJS.fn.interact.linkParticles(p,p2);
        }

        /* attract particles */
        if(pJS.particles.move.attract.enable){
          pJS.fn.interact.attractParticles(p,p2);
        }

        /* bounce particles */
        if(pJS.particles.move.bounce){
          pJS.fn.interact.bounceParticles(p,p2);
        }

      }
    }

  }

};

pJS.fn.particlesDraw = function(){

  /* clear canvas */
  pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);

  /* update each particles param */
  pJS.fn.particlesUpdate();

  /* draw each particle */
  for(var i = 0; i < pJS.particles.array.length; i++){
    var p = pJS.particles.array[i];
    p.draw();
  }

};

pJS.fn.particlesEmpty = function(){
  pJS.particles.array = [];
};

pJS.fn.particlesRefresh = function(){

  /* init all */
  cancelRequestAnimFrame(pJS.fn.checkAnimFrame);
  cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
  pJS.tmp.source_svg = undefined;
  pJS.tmp.img_obj = undefined;
  pJS.tmp.count_svg = 0;
  pJS.fn.particlesEmpty();
  pJS.fn.canvasClear();

  /* restart */
  pJS.fn.vendors.start();

};

/* ---------- pJS functions - particles interaction ------------ */

pJS.fn.interact.linkParticles = function(p1, p2){

  var dx = p1.x - p2.x,
      dy = p1.y - p2.y,
      dist = Math.sqrt(dx*dx + dy*dy);

  /* draw a line between p1 and p2 if the distance between them is under the config distance */
  if(dist <= pJS.particles.line_linked.distance){

    var opacity_line = pJS.particles.line_linked.opacity - (dist / (1/pJS.particles.line_linked.opacity)) / pJS.particles.line_linked.distance;

    if(opacity_line > 0){

      /* style */
      var color_line = pJS.particles.line_linked.color_rgb_line;
      pJS.canvas.ctx.strokeStyle = 'rgba('+color_line.r+','+color_line.g+','+color_line.b+','+opacity_line+')';
      pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
      //pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

      /* path */
      pJS.canvas.ctx.beginPath();
      pJS.canvas.ctx.moveTo(p1.x, p1.y);
      pJS.canvas.ctx.lineTo(p2.x, p2.y);
      pJS.canvas.ctx.stroke();
      pJS.canvas.ctx.closePath();

    }

  }

};

pJS.fn.interact.attractParticles  = function(p1, p2){

  /* condensed particles */
  var dx = p1.x - p2.x,
      dy = p1.y - p2.y,
      dist = Math.sqrt(dx*dx + dy*dy);

  if(dist <= pJS.particles.line_linked.distance){

    var ax = dx/(pJS.particles.move.attract.rotateX*1000),
        ay = dy/(pJS.particles.move.attract.rotateY*1000);

    p1.vx -= ax;
    p1.vy -= ay;

    p2.vx += ax;
    p2.vy += ay;

  }

}

pJS.fn.interact.bounceParticles = function(p1, p2){

  var dx = p1.x - p2.x,
      dy = p1.y - p2.y,
      dist = Math.sqrt(dx*dx + dy*dy),
      dist_p = p1.radius+p2.radius;

  if(dist <= dist_p){
    p1.vx = -p1.vx;
    p1.vy = -p1.vy;

    p2.vx = -p2.vx;
    p2.vy = -p2.vy;
  }

}

/* ---------- pJS functions - modes events ------------ */

pJS.fn.modes.pushParticles = function(nb, pos){

  pJS.tmp.pushing = true;

  for(var i = 0; i < nb; i++){
    pJS.particles.array.push(
      new pJS.fn.particle(
        pJS.particles.color,
        pJS.particles.opacity.value,
        {
          'x': pos ? pos.pos_x : Math.random() * pJS.canvas.w,
          'y': pos ? pos.pos_y : Math.random() * pJS.canvas.h
        }
      )
    )
    if(i == nb-1){
      if(!pJS.particles.move.enable){
        pJS.fn.particlesDraw();
      }
      pJS.tmp.pushing = false;
    }
  }

};

pJS.fn.modes.removeParticles = function(nb){

  pJS.particles.array.splice(0, nb);
  if(!pJS.particles.move.enable){
    pJS.fn.particlesDraw();
  }

};

pJS.fn.modes.bubbleParticle = function(p){

  /* on hover event */
  if(pJS.interactivity.events.onhover.enable && isInArray('bubble', pJS.interactivity.events.onhover.mode)){

    var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
        dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
        dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse),
        ratio = 1 - dist_mouse / pJS.interactivity.modes.bubble.distance;

    function init(){
      p.opacity_bubble = p.opacity;
      p.radius_bubble = p.radius;
    }

    /* mousemove - check ratio */
    if(dist_mouse <= pJS.interactivity.modes.bubble.distance){

      if(ratio >= 0 && pJS.interactivity.status == 'mousemove'){

        /* size */
        if(pJS.interactivity.modes.bubble.size != pJS.particles.size.value){

          if(pJS.interactivity.modes.bubble.size > pJS.particles.size.value){
            var size = p.radius + (pJS.interactivity.modes.bubble.size*ratio);
            if(size >= 0){
              p.radius_bubble = size;
            }
          }else{
            var dif = p.radius - pJS.interactivity.modes.bubble.size,
                size = p.radius - (dif*ratio);
            if(size > 0){
              p.radius_bubble = size;
            }else{
              p.radius_bubble = 0;
            }
          }

        }

        /* opacity */
        if(pJS.interactivity.modes.bubble.opacity != pJS.particles.opacity.value){

          if(pJS.interactivity.modes.bubble.opacity > pJS.particles.opacity.value){
            var opacity = pJS.interactivity.modes.bubble.opacity*ratio;
            if(opacity > p.opacity && opacity <= pJS.interactivity.modes.bubble.opacity){
              p.opacity_bubble = opacity;
            }
          }else{
            var opacity = p.opacity - (pJS.particles.opacity.value-pJS.interactivity.modes.bubble.opacity)*ratio;
            if(opacity < p.opacity && opacity >= pJS.interactivity.modes.bubble.opacity){
              p.opacity_bubble = opacity;
            }
          }

        }

      }

    }else{
      init();
    }

    /* mouseleave */
    if(pJS.interactivity.status == 'mouseleave'){
      init();
    }

  }

  /* on click event */
  else if(pJS.interactivity.events.onclick.enable && isInArray('bubble', pJS.interactivity.events.onclick.mode)){

    if(pJS.tmp.bubble_clicking){
      var dx_mouse = p.x - pJS.interactivity.mouse.click_pos_x,
          dy_mouse = p.y - pJS.interactivity.mouse.click_pos_y,
          dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse),
          time_spent = (new Date().getTime() - pJS.interactivity.mouse.click_time)/1000;

      if(time_spent > pJS.interactivity.modes.bubble.duration){
        pJS.tmp.bubble_duration_end = true;
      }

      if(time_spent > pJS.interactivity.modes.bubble.duration*2){
        pJS.tmp.bubble_clicking = false;
        pJS.tmp.bubble_duration_end = false;
      }
    }

    function process(bubble_param, particles_param, p_obj_bubble, p_obj, id){

      if(bubble_param != particles_param){

        if(!pJS.tmp.bubble_duration_end){
          if(dist_mouse <= pJS.interactivity.modes.bubble.distance){
            if(p_obj_bubble != undefined) var obj = p_obj_bubble;
            else var obj = p_obj;
            if(obj != bubble_param){
              var value = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration);
              if(id == 'size') p.radius_bubble = value;
              if(id == 'opacity') p.opacity_bubble = value;
            }
          }else{
            if(id == 'size') p.radius_bubble = undefined;
            if(id == 'opacity') p.opacity_bubble = undefined;
          }
        }else{
          if(p_obj_bubble != undefined){
            var value_tmp = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration),
                dif = bubble_param - value_tmp;
                value = bubble_param + dif;
            if(id == 'size') p.radius_bubble = value;
            if(id == 'opacity') p.opacity_bubble = value;
          }
        }

      }

    }

    if(pJS.tmp.bubble_clicking){
      /* size */
      process(pJS.interactivity.modes.bubble.size, pJS.particles.size.value, p.radius_bubble, p.radius, 'size');
      /* opacity */
      process(pJS.interactivity.modes.bubble.opacity, pJS.particles.opacity.value, p.opacity_bubble, p.opacity, 'opacity');
    }

  }

};

pJS.fn.modes.repulseParticle = function(p){

  if(pJS.interactivity.events.onhover.enable && isInArray('repulse', pJS.interactivity.events.onhover.mode) && pJS.interactivity.status == 'mousemove') {

    var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
        dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
        dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse);

    var normVec = {x: dx_mouse/dist_mouse, y: dy_mouse/dist_mouse},
        repulseRadius = pJS.interactivity.modes.repulse.distance,
        velocity = 100,
        repulseFactor = clamp((1/repulseRadius)*(-1*Math.pow(dist_mouse/repulseRadius,2)+1)*repulseRadius*velocity, 0, 50);

    var pos = {
      x: p.x + normVec.x * repulseFactor,
      y: p.y + normVec.y * repulseFactor
    }

    if(pJS.particles.move.out_mode == 'bounce'){
      if(pos.x - p.radius > 0 && pos.x + p.radius < pJS.canvas.w) p.x = pos.x;
      if(pos.y - p.radius > 0 && pos.y + p.radius < pJS.canvas.h) p.y = pos.y;
    }else{
      p.x = pos.x;
      p.y = pos.y;
    }

  }

  else if(pJS.interactivity.events.onclick.enable && isInArray('repulse', pJS.interactivity.events.onclick.mode)) {

    if(!pJS.tmp.repulse_finish){
      pJS.tmp.repulse_count++;
      if(pJS.tmp.repulse_count == pJS.particles.array.length){
        pJS.tmp.repulse_finish = true;
      }
    }

    if(pJS.tmp.repulse_clicking){

      var repulseRadius = Math.pow(pJS.interactivity.modes.repulse.distance/6, 3);

      var dx = pJS.interactivity.mouse.click_pos_x - p.x,
          dy = pJS.interactivity.mouse.click_pos_y - p.y,
          d = dx*dx + dy*dy;

      var force = -repulseRadius / d * 1;

      function process(){

        var f = Math.atan2(dy,dx);
        p.vx = force * Math.cos(f);
        p.vy = force * Math.sin(f);

        if(pJS.particles.move.out_mode == 'bounce'){
          var pos = {
            x: p.x + p.vx,
            y: p.y + p.vy
          }
          if (pos.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
          else if (pos.x - p.radius < 0) p.vx = -p.vx;
          if (pos.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
          else if (pos.y - p.radius < 0) p.vy = -p.vy;
        }

      }

      // default
      if(d <= repulseRadius){
        process();
      }

      // bang - slow motion mode
      // if(!pJS.tmp.repulse_finish){
      //   if(d <= repulseRadius){
      //     process();
      //   }
      // }else{
      //   process();
      // }

    }else{

      if(pJS.tmp.repulse_clicking == false){

        p.vx = p.vx_i;
        p.vy = p.vy_i;

      }

    }

  }

}

pJS.fn.modes.grabParticle = function(p){

  if(pJS.interactivity.events.onhover.enable && pJS.interactivity.status == 'mousemove'){

    var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
        dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
        dist_mouse = Math.sqrt(dx_mouse*dx_mouse + dy_mouse*dy_mouse);

    /* draw a line between the cursor and the particle if the distance between them is under the config distance */
    if(dist_mouse <= pJS.interactivity.modes.grab.distance){

      var opacity_line = pJS.interactivity.modes.grab.line_linked.opacity - (dist_mouse / (1/pJS.interactivity.modes.grab.line_linked.opacity)) / pJS.interactivity.modes.grab.distance;

      if(opacity_line > 0){

        /* style */
        var color_line = pJS.particles.line_linked.color_rgb_line;
        pJS.canvas.ctx.strokeStyle = 'rgba('+color_line.r+','+color_line.g+','+color_line.b+','+opacity_line+')';
        pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
        //pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

        /* path */
        pJS.canvas.ctx.beginPath();
        pJS.canvas.ctx.moveTo(p.x, p.y);
        pJS.canvas.ctx.lineTo(pJS.interactivity.mouse.pos_x, pJS.interactivity.mouse.pos_y);
        pJS.canvas.ctx.stroke();
        pJS.canvas.ctx.closePath();

      }

    }

  }

};

/* ---------- pJS functions - vendors ------------ */

pJS.fn.vendors.eventsListeners = function(){

  /* events target element */
  if(pJS.interactivity.detect_on == 'window'){
    pJS.interactivity.el = window;
  }else{
    pJS.interactivity.el = pJS.canvas.el;
  }

  /* detect mouse pos - on hover / click event */
  if(pJS.interactivity.events.onhover.enable || pJS.interactivity.events.onclick.enable){

    /* el on mousemove */
    pJS.interactivity.el.addEventListener('mousemove', function(e){

      if(pJS.interactivity.el == window){
        var pos_x = e.clientX,
            pos_y = e.clientY;
      }
      else{
        var pos_x = e.offsetX || e.clientX,
            pos_y = e.offsetY || e.clientY;
      }

      pJS.interactivity.mouse.pos_x = pos_x;
      pJS.interactivity.mouse.pos_y = pos_y;

      if(pJS.tmp.retina){
        pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio;
        pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio;
      }

      pJS.interactivity.status = 'mousemove';

    });

    /* el on onmouseleave */
    pJS.interactivity.el.addEventListener('mouseleave', function(e){

      pJS.interactivity.mouse.pos_x = null;
      pJS.interactivity.mouse.pos_y = null;
      pJS.interactivity.status = 'mouseleave';

    });

  }

  /* on click event */
  if(pJS.interactivity.events.onclick.enable){

    pJS.interactivity.el.addEventListener('click', function(){

      pJS.interactivity.mouse.click_pos_x = pJS.interactivity.mouse.pos_x;
      pJS.interactivity.mouse.click_pos_y = pJS.interactivity.mouse.pos_y;
      pJS.interactivity.mouse.click_time = new Date().getTime();

      if(pJS.interactivity.events.onclick.enable){

        switch(pJS.interactivity.events.onclick.mode){

          case 'push':
            if(pJS.particles.move.enable){
              pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
            }else{
              if(pJS.interactivity.modes.push.particles_nb == 1){
                pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
              }
              else if(pJS.interactivity.modes.push.particles_nb > 1){
                pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb);
              }
            }
          break;

          case 'remove':
            pJS.fn.modes.removeParticles(pJS.interactivity.modes.remove.particles_nb);
          break;

          case 'bubble':
            pJS.tmp.bubble_clicking = true;
          break;

          case 'repulse':
            pJS.tmp.repulse_clicking = true;
            pJS.tmp.repulse_count = 0;
            pJS.tmp.repulse_finish = false;
            setTimeout(function(){
              pJS.tmp.repulse_clicking = false;
            }, pJS.interactivity.modes.repulse.duration*1000)
          break;

        }

      }

    });

  }

};

pJS.fn.vendors.densityAutoParticles = function(){

  if(pJS.particles.number.density.enable){

    /* calc area */
    var area = pJS.canvas.el.width * pJS.canvas.el.height / 1000;
    if(pJS.tmp.retina){
      area = area/(pJS.canvas.pxratio*2);
    }

    /* calc number of particles based on density area */
    var nb_particles = area * pJS.particles.number.value / pJS.particles.number.density.value_area;

    /* add or remove X particles */
    var missing_particles = pJS.particles.array.length - nb_particles;
    if(missing_particles < 0) pJS.fn.modes.pushParticles(Math.abs(missing_particles));
    else pJS.fn.modes.removeParticles(missing_particles);

  }

};

pJS.fn.vendors.checkOverlap = function(p1, position){
  for(var i = 0; i < pJS.particles.array.length; i++){
    var p2 = pJS.particles.array[i];

    var dx = p1.x - p2.x,
        dy = p1.y - p2.y,
        dist = Math.sqrt(dx*dx + dy*dy);

    if(dist <= p1.radius + p2.radius){
      p1.x = position ? position.x : Math.random() * pJS.canvas.w;
      p1.y = position ? position.y : Math.random() * pJS.canvas.h;
      pJS.fn.vendors.checkOverlap(p1);
    }
  }
};

pJS.fn.vendors.createSvgImg = function(p){

  /* set color to svg element */
  var svgXml = pJS.tmp.source_svg,
      rgbHex = /#([0-9A-F]{3,6})/gi,
      coloredSvgXml = svgXml.replace(rgbHex, function (m, r, g, b) {
        if(p.color.rgb){
          var color_value = 'rgba('+p.color.rgb.r+','+p.color.rgb.g+','+p.color.rgb.b+','+p.opacity+')';
        }else{
          var color_value = 'hsla('+p.color.hsl.h+','+p.color.hsl.s+'%,'+p.color.hsl.l+'%,'+p.opacity+')';
        }
        return color_value;
      });

  /* prepare to create img with colored svg */
  var svg = new Blob([coloredSvgXml], {type: 'image/svg+xml;charset=utf-8'}),
      DOMURL = window.URL || window.webkitURL || window,
      url = DOMURL.createObjectURL(svg);

  /* create particle img obj */
  var img = new Image();
  img.addEventListener('load', function(){
    p.img.obj = img;
    p.img.loaded = true;
    DOMURL.revokeObjectURL(url);
    pJS.tmp.count_svg++;
  });
  img.src = url;

};

pJS.fn.vendors.destroypJS = function(){
  cancelAnimationFrame(pJS.fn.drawAnimFrame);
  canvas_el.remove();
  pJSDom = null;
};

pJS.fn.vendors.drawShape = function(c, startX, startY, sideLength, sideCountNumerator, sideCountDenominator){

  // By Programming Thomas - https://programmingthomas.wordpress.com/2013/04/03/n-sided-shapes/
  var sideCount = sideCountNumerator * sideCountDenominator;
  var decimalSides = sideCountNumerator / sideCountDenominator;
  var interiorAngleDegrees = (180 * (decimalSides - 2)) / decimalSides;
  var interiorAngle = Math.PI - Math.PI * interiorAngleDegrees / 180; // convert to radians
  c.save();
  c.beginPath();
  c.translate(startX, startY);
  c.moveTo(0,0);
  for (var i = 0; i < sideCount; i++) {
    c.lineTo(sideLength,0);
    c.translate(sideLength,0);
    c.rotate(interiorAngle);
  }
  //c.stroke();
  c.fill();
  c.restore();

};

pJS.fn.vendors.exportImg = function(){
  window.open(pJS.canvas.el.toDataURL('image/png'), '_blank');
};

pJS.fn.vendors.loadImg = function(type){

  pJS.tmp.img_error = undefined;

  if(pJS.particles.shape.image.src != ''){

    if(type == 'svg'){

      var xhr = new XMLHttpRequest();
      xhr.open('GET', pJS.particles.shape.image.src);
      xhr.onreadystatechange = function (data) {
        if(xhr.readyState == 4){
          if(xhr.status == 200){
            pJS.tmp.source_svg = data.currentTarget.response;
            pJS.fn.vendors.checkBeforeDraw();
          }else{
            console.log('Error pJS - Image not found');
            pJS.tmp.img_error = true;
          }
        }
      }
      xhr.send();

    }else{

      var img = new Image();
      img.addEventListener('load', function(){
        pJS.tmp.img_obj = img;
        pJS.fn.vendors.checkBeforeDraw();
      });
      img.src = pJS.particles.shape.image.src;

    }

  }else{
    console.log('Error pJS - No image.src');
    pJS.tmp.img_error = true;
  }

};

pJS.fn.vendors.draw = function(){

  if(pJS.particles.shape.type == 'image'){

    if(pJS.tmp.img_type == 'svg'){

      if(pJS.tmp.count_svg >= pJS.particles.number.value){
        pJS.fn.particlesDraw();
        if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
        else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
      }else{
        //console.log('still loading...');
        if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
      }

    }else{

      if(pJS.tmp.img_obj != undefined){
        pJS.fn.particlesDraw();
        if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
        else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
      }else{
        if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
      }

    }

  }else{
    pJS.fn.particlesDraw();
    if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
    else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
  }

};

pJS.fn.vendors.checkBeforeDraw = function(){

  // if shape is image
  if(pJS.particles.shape.type == 'image'){

    if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg == undefined){
      pJS.tmp.checkAnimFrame = requestAnimFrame(check);
    }else{
      //console.log('images loaded! cancel check');
      cancelRequestAnimFrame(pJS.tmp.checkAnimFrame);
      if(!pJS.tmp.img_error){
        pJS.fn.vendors.init();
        pJS.fn.vendors.draw();
      }

    }

  }else{
    pJS.fn.vendors.init();
    pJS.fn.vendors.draw();
  }

};

pJS.fn.vendors.init = function(){

  /* init canvas + particles */
  pJS.fn.retinaInit();
  pJS.fn.canvasInit();
  pJS.fn.canvasSize();
  pJS.fn.canvasPaint();
  pJS.fn.particlesCreate();
  pJS.fn.vendors.densityAutoParticles();

  /* particles.line_linked - convert hex colors to rgb */
  pJS.particles.line_linked.color_rgb_line = hexToRgb(pJS.particles.line_linked.color);

};

pJS.fn.vendors.start = function(){

  if(isInArray('image', pJS.particles.shape.type)){
    pJS.tmp.img_type = pJS.particles.shape.image.src.substr(pJS.particles.shape.image.src.length - 3);
    pJS.fn.vendors.loadImg(pJS.tmp.img_type);
  }else{
    pJS.fn.vendors.checkBeforeDraw();
  }

};

/* ---------- pJS - start ------------ */

pJS.fn.vendors.eventsListeners();

pJS.fn.vendors.start();

};

/* ———- global functions - vendors ———— */

Object.deepExtend = function(destination, source) {

for (var property in source) {
  if (source[property] && source[property].constructor &&
   source[property].constructor === Object) {
    destination[property] = destination[property] || {};
    arguments.callee(destination[property], source[property]);
  } else {
    destination[property] = source[property];
  }
}
return destination;

};

window.requestAnimFrame = (function(){

return  window.requestAnimationFrame ||
  window.webkitRequestAnimationFrame ||
  window.mozRequestAnimationFrame    ||
  window.oRequestAnimationFrame      ||
  window.msRequestAnimationFrame     ||
  function(callback){
    window.setTimeout(callback, 1000 / 60);
  };

})();

window.cancelRequestAnimFrame = ( function() {

return window.cancelAnimationFrame         ||
  window.webkitCancelRequestAnimationFrame ||
  window.mozCancelRequestAnimationFrame    ||
  window.oCancelRequestAnimationFrame      ||
  window.msCancelRequestAnimationFrame     ||
  clearTimeout

} )();

function hexToRgb(hex){

// By Tim Down - http://stackoverflow.com/a/5624139/3493650
// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
hex = hex.replace(shorthandRegex, function(m, r, g, b) {
   return r + r + g + g + b + b;
});
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
    r: parseInt(result[1], 16),
    g: parseInt(result[2], 16),
    b: parseInt(result[3], 16)
} : null;

};

function clamp(number, min, max) {

return Math.min(Math.max(number, min), max);

};

function isInArray(value, array) {

return array.indexOf(value) > -1;

}

/* ———- particles.js functions - start ———— */

window.pJSDom = [];

window.particlesJS = function(tag_id, params){

//console.log(params);

/* no string id? so it's object params, and set the id with default id */
if(typeof(tag_id) != 'string'){
  params = tag_id;
  tag_id = 'particles-js';
}

/* no id? set the id to default id */
if(!tag_id){
  tag_id = 'particles-js';
}

/* pJS elements */
var pJS_tag = document.getElementById(tag_id),
    pJS_canvas_class = 'particles-js-canvas-el',
    exist_canvas = pJS_tag.getElementsByClassName(pJS_canvas_class);

/* remove canvas if exists into the pJS target tag */
if(exist_canvas.length){
  while(exist_canvas.length > 0){
    pJS_tag.removeChild(exist_canvas[0]);
  }
}

/* create canvas element */
var canvas_el = document.createElement('canvas');
canvas_el.className = pJS_canvas_class;

/* set size canvas */
canvas_el.style.width = "100%";
canvas_el.style.height = "100%";

/* append canvas */
var canvas = document.getElementById(tag_id).appendChild(canvas_el);

/* launch particle.js */
if(canvas != null){
  pJSDom.push(new pJS(tag_id, params));
}

};

window.particlesJS.load = function(tag_id, path_config_json, callback){

/* load json config */
var xhr = new XMLHttpRequest();
xhr.open('GET', path_config_json);
xhr.onreadystatechange = function (data) {
  if(xhr.readyState == 4){
    if(xhr.status == 200){
      var params = JSON.parse(data.currentTarget.response);
      window.particlesJS(tag_id, params);
      if(callback) callback();
    }else{
      console.log('Error pJS - XMLHttpRequest status: '+xhr.status);
      console.log('Error pJS - File config not found');
    }
  }
};
xhr.send();

};