【babylonjs】babylonjs实践（一）--入门背景使用场景是无人车中的显示，比如特斯拉屏幕中的展示和apo

背景

使用场景是无人车中的显示，比如特斯拉屏幕中的展示和apollo中的dreamview。目前还做的比较简单，效果如下，

从今天开始我会抛开业务逻辑，从理论基础开始介绍babylonjs。系统的介绍。结合中英文文档。www.babylonjs.com/

入门

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html" charset="utf-8"/>
    <title>Babylon - Getting Started</title>
    <!--- Link to the last version of BabylonJS --->
    <script src="https://cdn.babylonjs.com/babylon.js"></script>
    <style>
        html, body {
            overflow: hidden;
            width   : 100%;
            height  : 100%;
            margin  : 0;
            padding : 0;
        }

        #renderCanvas {
            width   : 100%;
            height  : 100%;
            touch-action: none;
        }
    </style>
</head>
<body>
    <canvas id="renderCanvas"></canvas>
    <script>
        window.addEventListener('DOMContentLoaded', function(){
            // get the canvas DOM element
            var canvas = document.getElementById('renderCanvas');

            // load the 3D engine
            var engine = new BABYLON.Engine(canvas, true);

            // createScene function that creates and return the scene
            var createScene = function(){
                // create a basic BJS Scene object
                var scene = new BABYLON.Scene(engine);

                // create a FreeCamera, and set its position to (x:0, y:5, z:-10)
                var camera = new BABYLON.FreeCamera('camera1', new BABYLON.Vector3(0, 5,-10), scene);

                // target the camera to scene origin
                camera.setTarget(BABYLON.Vector3.Zero());

                // attach the camera to the canvas
                camera.attachControl(canvas, false);

                // create a basic light, aiming 0,1,0 - meaning, to the sky
                var light = new BABYLON.HemisphericLight('light1', new BABYLON.Vector3(0,1,0), scene);

                // create a built-in "sphere" shape; its constructor takes 6 params: name, segment, diameter, scene, updatable, sideOrientation 
                var sphere = BABYLON.Mesh.CreateSphere('sphere1', 16, 2, scene);

                // move the sphere upward 1/2 of its height
                sphere.position.y = 1;

                // create a built-in "ground" shape;
                var ground = BABYLON.Mesh.CreateGround('ground1', 7, 6, 2, scene);

                // return the created scene
                return scene;
            }

            // call the createScene function
            var scene = createScene();

            // run the render loop
            engine.runRenderLoop(function(){
                scene.render();
            });

            // the canvas/window resize event handler
            window.addEventListener('resize', function(){
                engine.resize();
            });
        });
    </script>
</body>
</html>

可以直接拿来跑
先create scene，
然后放置camera， camera设定朝向，增加控制
然后增加灯光，
放置一个ground
放置一个球

完成，得到效果图。这里面把最重要的几个概念都讲了，相机、灯光、物体，后面将详细展开。