Head Up Display

by KUO YOU-TING

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>
<div id="info">Static Title
    <br/> 
    <a href="javascript:count(0);">Count UP</a>
    <a href="javascript:count(1);">Count DOWN</a>
</div>
<div id="dataShow"></div>

CSS

#info {
    position: absolute;
    top: 0px;
    width: 100%;
    padding: 15px;
    text-align: center;
    color: #ffff00;
}
a {
    color: white;
}
#dataShow {
    position: absolute;
    bottom: 20px;
    width: 100%;
    padding:5px;
    text-align: center;
    color: #00ffff;
}
body {
    margin: 0px;
    overflow:hidden;
}

JavaScript

var clock = new THREE.Clock();
var scene, renderer, camera;
var cube;
/////// for HUD //////////////////////////////////////
var angleShow;
var counter = 0;

init();
animate();

// remember to change 'onLoad' to 'No wrap - in <body>'
function count(option) {
    if (option === 0) {
        ++counter;
    } else {
        --counter;
    }
    angleShow.innerHTML = counter;
}

function init() {
    var width = window.innerWidth;
    var height = window.innerHeight;

    renderer = new THREE.WebGLRenderer({
        antialias: true
    });
    renderer.setClearColor(new THREE.Color(0x888888));

    ////////////////////////////////////////////////////////////
    angleShow = document.getElementById("dataShow");

    renderer.setSize(width, height);
    document.body.appendChild(renderer.domElement);

    scene = new THREE.Scene();

    var cubeGeometry = new THREE.BoxGeometry(10, 10, 10);
    var cubeMaterial = new THREE.MeshLambertMaterial({
        color: 0x1ec876
    });
    //cubeMaterial = new THREE.MeshBasicMaterial ({color: 0xff0000, vertexColors: THREE.VertexColor});
    cube = new THREE.Mesh(cubeGeometry, cubeMaterial);

    cube.position.set(50, 0, 0);
    scene.add(cube);

    camera = new THREE.PerspectiveCamera(45, width / height, 0.1, 10000);
    camera.position.y = 160;
    camera.position.z = 400;
    camera.lookAt(new THREE.Vector3(0, 0, 0));

    var gridXZ = new THREE.GridHelper(100, 10);
    gridXZ.setColors(new THREE.Color(0xff0000), new THREE.Color(0xffffff));
    scene.add(gridXZ);

    var pointLight = new THREE.PointLight(0xffffff);
    pointLight.position.set(0, 300, 200);
    scene.add(pointLight);

    window.addEventListener('resize', onWindowResize, false);
}

function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
}

function animate() {
    requestAnimationFrame(animate);
    render();
}

function render() {
...