MediaWiki:Particles.js

/* --- /* Author : Vincent Garreau - vincentgarreau.com /* MIT license: http://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;

};