纯JS制作的窗户雨滴效果
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function?demo() {var?engine =?new?RainyDay('canvas','demo1', window.innerWidth, window.innerHeight);engine.gravity = engine.GRAVITY_NON_LINEAR;engine.trail = engine.TRAIL_DROPS;engine.rain([engine.preset(0, 2, 500)]);engine.rain([engine.preset(3, 3, 0.88),engine.preset(5, 5, 0.9),engine.preset(6, 2, 1),], 100);?}?
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