27

【canvas】箭头跟随鼠标移动的动画原理

 4 years ago
source link: https://juejin.im/post/5e0c5cee6fb9a0482806d98b
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
neoserver,ios ssh client
先来看动画效果: 这个动画看起来有点难,但其实要比想象中的简单。 它只是平移和旋转的简单合成,下面大体分析一下。 1. 鼠标位置 要跟随鼠标移动,首先就要获取鼠标的位置。 可以给画布绑定mousemove事件,这样拿到鼠标相对于页面的绝对位置(pageX,p

About Joyk


Aggregate valuable and interesting links.
Joyk means Joy of geeK