html5的canvas实现3d雪花飘舞效果

复制代码代码如下:var SCREEN_WIDTH = window.innerWidth; var SCREEN_HEIGHT = window.innerHeight;</p> <p> var container;</p> <p> var particle;</p> <p> var camera; var scene; var renderer;</p> <p> var mouseX = 0; var mouseY = 0;</p> <p> var windowHalfX = window.innerWidth / 2; var windowHalf