[TOC] > [github](https://github.com/shrekshrek/css3d-engine) ## 概述 `threejs`等3d引擎太强大了，这些引擎的代码量都有大几百K，在今天的网速下显得无所谓，但在几年前我接到需求时仍然是重要的考量因素。既然我们只用到3D引擎的一点点功能，那么能否找到一个更加轻量的3D引擎呢。 ## 实例 ``` window.onload=initCSS3D; function initCSS3D(){ var s = new C3D.Stage(); s.size(window.innerWidth, window.innerHeight).update(); document.getElementById('container').appendChild(s.el); var box = new C3D.Skybox(); box.size(954).position(0, 0, 0).material({ front: {image: "images/scene_front.jpeg"}, back: {image: "images/scene_back.jpeg"}, left: {image: "images/scene_right.jpeg"}, right: {image: "images/scene_left.jpeg"}, up: {image: "images/scene_top.jpeg"}, down: {image: "images/scene_bottom.jpeg"}, }).update(); s.addChild(box); function loop() { angleX += (curMouseX - lastMouseX + lastAngleX - angleX) * 0.3; angleY += (curMouseY - lastMouseY + lastAngleY - angleY) * 0.3; s.camera.rotation(angleY, -angleX, 0).updateT(); requestAnimationFrame(loop); } loop(); var lastMouseX = 0; var lastMouseY = 0; var curMouseX = 0; var curMouseY = 0; var lastAngleX = 0; var lastAngleY = 0; var angleX = 0; var angleY = 0; document.addEventListener("mousedown", mouseDownHandler); document.addEventListener("mouseup", mouseUpHandler); function mouseDownHandler(evt) { lastMouseX = curMouseX = evt.pageX; lastMouseY = curMouseY = evt.pageY; lastAngleX = angleX; lastAngleY = angleY; document.addEventListener("mousemove", mouseMoveHandler); } function mouseMoveHandler(evt) { curMouseX = evt.pageX; curMouseY = evt.pageY; } function mouseUpHandler(evt) { curMouseX = evt.pageX; curMouseY = evt.pageY; document.removeEventListener("mousemove", mouseMoveHandler); } } ```