引入js文件

<script src='js/three.min.js'></script>
<script src='js/CopyShader.js'></script>
<script src='js/EffectComposer.js'></script>
<script src='js/FilmPass.js'></script>
<script src='js/FilmShader.js'></script>
<script src='js/ShaderPass.js'></script>
<script src='js/RenderPass.js'></script>
<script src="js/index.js"></script>