canvas 绘制星星动图效果(慕课网练习)
创建 canvas 元素 → 绘制背景图 → 画一颗星星 → 画一堆星星 → 星星闪烁 → 星星移动 → 边界判定
- 星星闪烁:绘制序列帧
- 自己调节序列帧在
requestAmimationFrame()
回调函数中的循环时长 - 多个星星的绘制:构造函数(类)的应用
canvas 绘制星星动图效果
canvas 绘制星星动图效果(慕课网练习)
创建 canvas 元素 → 绘制背景图 → 画一颗星星 → 画一堆星星 → 星星闪烁 → 星星移动 → 边界判定
requestAmimationFrame()
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