質問編集履歴
3
追加情報
test
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test
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@@ -25,3 +25,263 @@
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なお、開発はrailsで行なっており、現在はhtml.erbのファイルにsketch.jsを読み込ませて、上記サイトのhtmlファイルに記述されているscriptをコピペしている状態です。
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追記
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現在、railsで開発をしていて、index.html.erbは下記のようになっております。
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```script
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<canvas id="canvas"></canvas>
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<section id="body">
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// 中身
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</section>
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<script src="../js/sketch.js"></script>
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<script>
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// ---------------------------------------- Particle ----------------------------------------
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function Particle(x, y, radius) {
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this.init(x, y, radius);
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}
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Particle.prototype = {
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init: function (x, y, radius) {
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this.alive = true;
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this.radius = radius || 10;
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this.wander = 0.15;
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this.theta = random(TWO_PI);
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this.drag = 0.92;
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this.color = '#fff';
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this.x = x || 0.0;
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this.y = y || 0.0;
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this.vx = 0.0;
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this.vy = 0.0;
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},
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move: function () {
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this.x += this.vx;
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this.y += this.vy;
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this.vx *= this.drag;
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this.vy *= this.drag;
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this.theta += random(-0.5, 0.5) * this.wander;
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this.vx += sin(this.theta) * 0.1;
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this.vy += cos(this.theta) * 0.1;
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this.radius *= 0.96;
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this.alive = this.radius > 0.5;
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},
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draw: function (ctx) {
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ctx.beginPath();
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ctx.arc(this.x, this.y, this.radius, 0, TWO_PI);
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ctx.fillStyle = this.color;
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ctx.fill();
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}
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};
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// ---------------------------------------- Example ----------------------------------------
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var MAX_PARTICLES = 280;
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var COLOURS = [
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'#69D2E7',
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'#A7DBD8',
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'#E0E4CC',
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'#F38630',
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'#FA6900',
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'#FF4E50',
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'#F9D423'
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];
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var particles = [];
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var pool = [];
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var demo = Sketch.create({container: document.getElementById('canvas'), retina: 'auto'});
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demo.setup = function () {
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// Set off some initial particles.
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var i,
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x,
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y;
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for (i = 0; i < 20; i++) {
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x = (demo.width * 0.5) + random(-100, 100);
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y = (demo.height * 0.5) + random(-100, 100);
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demo.spawn(x, y);
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}
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};
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demo.spawn = function (x, y) {
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var particle,
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theta,
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force;
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if (particles.length >= MAX_PARTICLES)
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pool.push(particles.shift());
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particle = pool.length
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? pool.pop()
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: new Particle();
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particle.init(x, y, random(5, 40));
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particle.wander = random(0.5, 2.0);
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particle.color = random(COLOURS);
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particle.drag = random(0.9, 0.99);
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theta = random(TWO_PI);
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force = random(2, 8);
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particle.vx = sin(theta) * force;
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particle.vy = cos(theta) * force;
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particles.push(particle);
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};
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demo.update = function () {
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var i,
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particle;
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for (i = particles.length - 1; i >= 0; i--) {
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particle = particles[i];
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if (particle.alive)
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particle.move();
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else
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pool.push(particles.splice(i, 1)[0]);
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}
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};
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demo.draw = function () {
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demo.globalCompositeOperation = 'lighter';
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for (var i = particles.length - 1; i >= 0; i--) {
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particles[i].draw(demo);
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}
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};
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demo.mousemove = function () {
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var particle,
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theta,
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force,
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touch,
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max,
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i,
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j,
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n;
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for (i = 0, n = demo.touches.length; i < n; i++) {
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touch = demo.touches[i],
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max = random(1, 4);
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for (j = 0; j < max; j++) {
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demo.spawn(touch.x, touch.y);
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}
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}
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};
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</script>
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```
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ですがスケッチが背景に指定されません。どなたか回答お願いします。
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2
誤字修正
test
CHANGED
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@@ -1 +1 @@
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1
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-
S
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1
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Sketch.jsのパーティクルの実装をbackroundに指定したい
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test
CHANGED
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File without changes
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1
誤字修正
test
CHANGED
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File without changes
|
test
CHANGED
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@@ -1,4 +1,4 @@
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1
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-
現在以下のサイトを見てs
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1
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現在以下のサイトを見てsketch.jsのparticleの実装を行なっています。
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2
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3
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http://soulwire.github.io/sketch.js/examples/particles.html
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@@ -24,4 +24,4 @@
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27
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-
なお、開発はrailsで行なっており、現在はhtml.erbのファイルにs
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|
27
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+
なお、開発はrailsで行なっており、現在はhtml.erbのファイルにsketch.jsを読み込ませて、上記サイトのhtmlファイルに記述されているscriptをコピペしている状態です。
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