HTML5 web background bubble rising
HTML5 web background bubble rising
代碼片段：
? ? ? run(now) {
? ? ? ? var bubble, j, len, ref;
? ? ? ? this.update(now);
? ? ? ? this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
? ? ? ? ref = this.bubbles;
? ? ? ? for (j = 0, len = ref.length; j < len; j++) {
? ? ? ? ? bubble = ref[j];
? ? ? ? ? this.ctx.moveTo(bubble.x, bubble.y);
? ? ? ? ? this.ctx.beginPath();
? ? ? ? ? this.ctx.arc(bubble.x, bubble.y, bubble.r, 0, 2 * Math.PI);
? ? ? ? ? this.ctx.fill();
? ? ? ? }
? ? ? ? return requestAnimationFrame(() => {
? ? ? ? ? return this.run(new Date().getTime());
? ? ? ? });
? ? ? }
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