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threejs-basic-2020-05-07.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,user-scalable=no,minimum-scale=1.0,maximum-scale=1.0">
<meta name=description
content="Real-time interactive 3D graphics in your browser using the WebGL and the Three.js JavaScript library">
<meta name=keywords content="Three.js,WebGL,JavaScript,GitHub,FOSS,3D,STEM">
<meta name=version content="2020-03-03">
<title></title>
<style>
/* Copyright 2020 Theo Armour. MIT License */
:root { font: 100% monospace; }
* { box-sizing: border-box; }
body { margin: 0; overflow: hidden; }
a { color: crimson; text-decoration: none; }
a:hover, a:focus, a:active { background-color: yellow; color: #aaa; text-decoration: underline; }
button { background-color: #ddd; border: none; border-radius: 2px; color: #322;cursor: pointer; padding: 3px 5px; }
button:hover { background: #ccc; color: #fff }
input[ type=range ] { -webkit-appearance: none; -moz-appearance: none; background-color: #ddd; border-radius: 2px; height: 1.7ch; width: 100%; }
input[ type=range ]::-moz-range-thumb { background-color: #888; border-radius: 2; width: 10px; }
input[ type=range ]::-webkit-slider-thumb { -webkit-appearance: none; background-color: #888; height: 18px; width: 10px; }
.info { float: right }
.info:hover>.infotooltip { display: block; }
.infotooltip { border: 0.8ch double #888; background: white; display: none;
font: 100% monospace; font-size: 1rem; font-weight: normal; /* unset summary settings */
margin-left: -28ch; padding: 10px; position: absolute; z-index: 1000; }
.navText { background-color: white; margin: 1ch 0; padding: 1ch; }
#navMenu { margin: 0 20px; max-width: 15rem; position: absolute; }
</style>
</head>
<body>
<script src="https://cdn.jsdelivr.net/gh/mrdoob/three.js@r116/build/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/mrdoob/three.js@r116/examples/js/controls/TrackballControls.js"></script>
<nav id="navMenu" >
<header id="hdrTitle" >
<h2>
<a id=aSource target=_top title="Source code on GitHub" >◯</a>
<a href="" title="Click to reload this page" >
<span id=sTitle ></span>
<span id=sVersion ></span>
</a>
<span class="info" >ⓘ<span id=divDescription class="infotooltip" ></span></span>
</h2>
</header>
<p>
<button onclick="addMeshes()">add meshes</button>
</p>
<p>
<button onclick=controls.reset() >reset view</button>
<button onclick="sceneRotation = sceneRotation === 1 ? 0 : 1;">rotation</button>
</p>
<p>
<output id=outSpeed>50</output>
<input type="range" id="inpSpeed" onclick="sceneRotation=0.05 * this.value;outSpeed.innerHTML=this.value;" />
</p>
<p
title="View the number of objects that need rendering and the total number of triangles used to create the objects">
<button onclick="setStats()">setStats</button>
</p>
<div id="divLog"></div>
</nav>
<script>
aSource.href = "https://github.com/zzzzz/xxxxx.html";
svgOcticon = `<svg height="18" class="octicon" viewBox="0 0 16 16" version="1.1" width="18" aria-hidden="true"><path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"></path></svg>`;
aSource.innerHTML = svgOcticon;
sTitle.innerHTML= document.title ? document.title : location.href.split( '/' ).pop().slice( 0, - 5 ).replace( /-/g, ' ' );
const version = document.head.querySelector( "[ name=version ]" );
sVersion.innerHTML = version ? version.content : "";
divDescription.innerHTML = document.head.querySelector( "[ name=description ]" ).content;
let mesh, group, axesHelper, lightDirectional, cameraHelper;
let sceneRotation = 1;
let renderer, camera, controls, scene;
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( - 100, - 100, 100 );
camera.up.set( 0, 0, 1 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xcce0ff );
//scene.fog = new THREE.Fog( 0xcce0ff, 550, 800 );
scene.add( camera )
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
renderer.outputEncoding = THREE.sRGBEncoding;
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
controls = new THREE.TrackballControls( camera, renderer.domElement );
controls.maxDistance = 500;
controls.rotateSpeed = 5;
//controls.maxPolarAngle = Math.PI * 0.5;
window.addEventListener( 'resize', onWindowResize, false );
window.addEventListener( 'orientationchange', onWindowResize, false );
window.addEventListener( 'keyup', () => sceneRotation = 0, false );
renderer.domElement.addEventListener( 'click', () => sceneRotation = 0, false );
addLights();
axesHelper = new THREE.AxesHelper( 100 );
scene.add( axesHelper );
addGround();
addMesh();
//addMeshes();
zoomObjectBoundingSphere();
}
function addMesh( size = 20 ) {
// CylinderGeometry( radiusTop, radiusBottom, height, radiusSegments, heightSegments, openEnded )
// SphereGeometry( radius, segmentsWidth, segmentsHeight, phiStart, phiLength, thetaStart, thetaLength )
// TorusGeometry( radius, tube, radialSegments, tubularSegments, arc )
const geometry = new THREE.BoxGeometry( size, size, size );
geometry.applyMatrix4( new THREE.Matrix4().makeRotationX( -0.5 * Math.PI ) );
geometry.applyMatrix4( new THREE.Matrix4().makeScale( 1, 1, 1 ) );
geometry.applyMatrix4( new THREE.Matrix4().makeTranslation( 0, 0, 0 ) );
//const material = new THREE.MeshNormalMaterial();
const material = new THREE.MeshPhongMaterial( { color: 0xffffff * Math.random(), specular: 0xffffff } );
mesh = new THREE.Mesh( geometry, material );
mesh.receiveShadow = true;
mesh.castShadow = true;
scene.add( mesh );
return mesh;
}
function addMeshes( count = 100 ) {
scene.remove( group );
group = new THREE.Group();
for ( let i = 0; i < count; i++ ) { group.add( addMesh() ) };
group.children.forEach( mesh => {
mesh.position.set( Math.random() * 100 - 50, Math.random() * 100 - 50, Math.random() * 100 - 50 )
mesh.rotation.set( 0.2 * Math.random(), 0.2 * Math.random(), 0.2 * Math.random() )
} );
scene.add( group );
zoomObjectBoundingSphere( group );
}
function addLights() {
//scene.add( new THREE.AmbientLight( 0x404040 ) );
scene.add( new THREE.AmbientLight( 0x666666 ) );
const pointLight = new THREE.PointLight( 0xffffff, 0.2 );
pointLight.position.copy( camera.position );
camera.add( pointLight );
lightDirectional = new THREE.DirectionalLight( 0xdffffff, 0.5 );
lightDirectional.position.set( -50, -200, 100 );
lightDirectional.castShadow = true;
lightDirectional.shadow.mapSize.width = 1024;
lightDirectional.shadow.mapSize.height = 1024;
var d = 100;
lightDirectional.shadow.camera.left = - d;
lightDirectional.shadow.camera.right = d;
lightDirectional.shadow.camera.top = d;
lightDirectional.shadow.camera.bottom = - d;
lightDirectional.shadow.camera.far = 500;
scene.add( lightDirectional );
scene.add( new THREE.CameraHelper( lightDirectional.shadow.camera ) );
}
function addGround() {
const geometry = new THREE.PlaneBufferGeometry( 2000, 2000 );
const material = new THREE.MeshPhongMaterial( { color: 0xaaaaaa, depthWrite: false, side: 2 } );
const mesh = new THREE.Mesh( geometry, material );
mesh.position.z = -50;
mesh.receiveShadow = true;
scene.add( mesh );
}
function zoomObjectBoundingSphere( obj = group ) {
//console.log( "obj", obj );
center = new THREE.Vector3( 0, 0, 0 );
radius= 50;
const bbox = new THREE.Box3().setFromObject( obj );
//console.log( 'bbox', bbox );
if ( bbox.max.x !== Infinity ) {
const sphere = bbox.getBoundingSphere( new THREE.Sphere() );
center = sphere.center;
radius = sphere.radius;
//console.log( "sphere", sphere )
}
controls.target.copy( center ); // needed because model may be far from origin
controls.maxDistance = 50 * radius;
delta = camera.position.clone().sub( controls.target ).normalize();
//console.log( 'delta', delta );
position = controls.target.clone().add( delta.multiplyScalar( 2 * radius ) );
//console.log( 'position', position );
distance = controls.target.distanceTo( camera.position );
//camera.zoom = distance / ( * radius ) ;
camera.position.copy( center.clone().add( new THREE.Vector3( -2 * radius, 2 * radius, 1.0 * radius ) ) );
camera.near = 0.001 * radius; //2 * camera.position.length();
camera.far = 50 * radius; //2 * camera.position.length();
camera.updateProjectionMatrix();
axesHelper.position.copy( center );
if ( lightDirectional ) {
lightDirectional.position.copy( center.clone().add( new THREE.Vector3( -1.5 * radius, 1.5 * radius, 1.5 * radius ) ) );
lightDirectional.shadow.camera.scale.set( 0.02 * radius, 0.02 * radius, 0.2 * radius );
//targetObject.position.copy( center );
scene.remove( cameraHelper );
cameraHelper = new THREE.CameraHelper( lightDirectional.shadow.camera );
scene.add( cameraHelper );
}
let event = new Event( "onresetthree", {"bubbles": true, "cancelable": false, detail: true } );
//window.addEventListener( "onrresetthree", doThings, false );
// listening: or-object-rotation-xx.js
// listening: dss-display-scene-settings-xx.js
window.dispatchEvent( event );
};
function requestFile( url, callback ) {
const xhr = new XMLHttpRequest();
xhr.open( 'GET', url, true );
xhr.onerror = ( xhr ) => console.log( 'error:', xhr );
//xhr.onprogress = ( xhr ) => console.log( 'bytes loaded:', xhr.loaded );
xhr.onload = ( xhr ) => callback( xhr.target.response );
xhr.send( null );
}
function setStats () {
const script = document.head.appendChild( document.createElement( "script" ) );
script.onload = () => {
const stats = new Stats();
const sts = document.body.appendChild( stats.dom );
sts.style.left = "";
sts.style.right = "0px";
requestAnimationFrame( function loop () {
stats.update(); requestAnimationFrame( loop );
} );
};
script.src = "https://raw.githack.com/mrdoob/stats.js/master/build/stats.min.js";
const render = renderer.info.render;
const divRendererInfo = navMenu.appendChild( document.createElement( "div" ) );
divRendererInfo.innerHTML = `
Renderer Info<br>
Calls: ${render.calls }<br>
Lines: ${ render.lines }<br>
Triangles: ${render.triangles.toLocaleString() }<br>
`;
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
controls.handleResize();
//console.log( 'onWindowResize window.innerWidth', window.innerWidth );
}
function animate() {
requestAnimationFrame( animate );
renderer.render( scene, camera );
controls.update();
group.rotation.z += sceneRotation / 1000;
}
</script>
</body>
</html>