/* ----------------------------------------------- /* Author : Vincent Garreau - vincentgarreau.com /* MIT license: https://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(); } } else if ( /* on click event */ 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(" + 251 + "," + 195 + "," + 94 + "," + 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.html", 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%20pJS%20-%20No%20image.html"); 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.html", 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(); }; /* ----------------------------------------------- /* How to use? : Check the GitHub README /* ----------------------------------------------- */ /* To load a config file (particles.json) you need to host this demo (MAMP/WAMP/local)... */ /* particlesJS.load('particles-js', 'particles.json', function() { console.log('particles.js loaded - callback'); }); */ /* Otherwise just put the config content (json): */ particlesJS('particles-js', { "particles": { "number": { "value": 80, "density": { "enable": true, "value_area": 800 } }, "color": { "value": "#ffffff" }, "shape": { "type": "circle", "stroke": { "width": 0, "color": "#000000" }, "polygon": { "nb_sides": 5 }, "image": { "src": "assets/img/github.svg", "width": 100, "height": 100 } }, "opacity": { "value": 0.5, "random": false, "anim": { "enable": false, "speed": 1, "opacity_min": 0.1, "sync": false } }, "size": { "value": 5, "random": true, "anim": { "enable": false, "speed": 40, "size_min": 0.1, "sync": false } }, "line_linked": { "enable": true, "distance": 150, "color": "#ffffff", "opacity": 0.4, "width": 1 }, "move": { "enable": true, "speed": 6, "direction": "none", "random": false, "straight": false, "out_mode": "out", "attract": { "enable": false, "rotateX": 600, "rotateY": 1200 } } }, "interactivity": { "detect_on": "canvas", "events": { "onhover": { "enable": true, "mode": "repulse" }, "onclick": { "enable": true, "mode": "push" }, "resize": true }, "modes": { "grab": { "distance": 400, "line_linked": { "opacity": 1 } }, "bubble": { "distance": 400, "size": 40, "duration": 2, "opacity": 8, "speed": 3 }, "repulse": { "distance": 200 }, "push": { "particles_nb": 4 }, "remove": { "particles_nb": 2 } } }, "retina_detect": true, "config_demo": { "hide_card": false, "background_color": "#b61924", "background_image": "", "background_position": "50% 50%", "background_repeat": "no-repeat", "background_size": "cover" } } );