You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
171 lines
4.7 KiB
171 lines
4.7 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - morph targets</title>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
||
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body>
|
||
|
|
<div id="container"></div>
|
||
|
|
<div id="info">
|
||
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - morph targets<br/>
|
||
|
|
by <a href="https://discoverthreejs.com/" target="_blank" rel="noopener">Discover three.js</a>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../build/three.module.js",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
||
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
||
|
|
|
||
|
|
let container, camera, scene, renderer, mesh;
|
||
|
|
|
||
|
|
init();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
container = document.getElementById( 'container' );
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
scene.background = new THREE.Color( 0x8FBCD4 );
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 20 );
|
||
|
|
camera.position.z = 10;
|
||
|
|
scene.add( camera );
|
||
|
|
|
||
|
|
scene.add( new THREE.AmbientLight( 0x8FBCD4, 0.4 ) );
|
||
|
|
|
||
|
|
const pointLight = new THREE.PointLight( 0xffffff, 1 );
|
||
|
|
camera.add( pointLight );
|
||
|
|
|
||
|
|
const geometry = createGeometry();
|
||
|
|
|
||
|
|
const material = new THREE.MeshPhongMaterial( {
|
||
|
|
color: 0xff0000,
|
||
|
|
flatShading: true
|
||
|
|
} );
|
||
|
|
|
||
|
|
mesh = new THREE.Mesh( geometry, material );
|
||
|
|
scene.add( mesh );
|
||
|
|
|
||
|
|
initGUI();
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
renderer.setAnimationLoop( function () {
|
||
|
|
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
} );
|
||
|
|
container.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
const controls = new OrbitControls( camera, renderer.domElement );
|
||
|
|
controls.enableZoom = false;
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function createGeometry() {
|
||
|
|
|
||
|
|
const geometry = new THREE.BoxGeometry( 2, 2, 2, 32, 32, 32 );
|
||
|
|
|
||
|
|
// create an empty array to hold targets for the attribute we want to morph
|
||
|
|
// morphing positions and normals is supported
|
||
|
|
geometry.morphAttributes.position = [];
|
||
|
|
|
||
|
|
// the original positions of the cube's vertices
|
||
|
|
const positionAttribute = geometry.attributes.position;
|
||
|
|
|
||
|
|
// for the first morph target we'll move the cube's vertices onto the surface of a sphere
|
||
|
|
const spherePositions = [];
|
||
|
|
|
||
|
|
// for the second morph target, we'll twist the cubes vertices
|
||
|
|
const twistPositions = [];
|
||
|
|
const direction = new THREE.Vector3( 1, 0, 0 );
|
||
|
|
const vertex = new THREE.Vector3();
|
||
|
|
|
||
|
|
for ( let i = 0; i < positionAttribute.count; i ++ ) {
|
||
|
|
|
||
|
|
const x = positionAttribute.getX( i );
|
||
|
|
const y = positionAttribute.getY( i );
|
||
|
|
const z = positionAttribute.getZ( i );
|
||
|
|
|
||
|
|
spherePositions.push(
|
||
|
|
|
||
|
|
x * Math.sqrt( 1 - ( y * y / 2 ) - ( z * z / 2 ) + ( y * y * z * z / 3 ) ),
|
||
|
|
y * Math.sqrt( 1 - ( z * z / 2 ) - ( x * x / 2 ) + ( z * z * x * x / 3 ) ),
|
||
|
|
z * Math.sqrt( 1 - ( x * x / 2 ) - ( y * y / 2 ) + ( x * x * y * y / 3 ) )
|
||
|
|
|
||
|
|
);
|
||
|
|
|
||
|
|
// stretch along the x-axis so we can see the twist better
|
||
|
|
vertex.set( x * 2, y, z );
|
||
|
|
|
||
|
|
vertex.applyAxisAngle( direction, Math.PI * x / 2 ).toArray( twistPositions, twistPositions.length );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// add the spherical positions as the first morph target
|
||
|
|
geometry.morphAttributes.position[ 0 ] = new THREE.Float32BufferAttribute( spherePositions, 3 );
|
||
|
|
|
||
|
|
// add the twisted positions as the second morph target
|
||
|
|
geometry.morphAttributes.position[ 1 ] = new THREE.Float32BufferAttribute( twistPositions, 3 );
|
||
|
|
|
||
|
|
return geometry;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function initGUI() {
|
||
|
|
|
||
|
|
// Set up dat.GUI to control targets
|
||
|
|
const params = {
|
||
|
|
Spherify: 0,
|
||
|
|
Twist: 0,
|
||
|
|
};
|
||
|
|
const gui = new GUI( { title: 'Morph Targets' } );
|
||
|
|
|
||
|
|
gui.add( params, 'Spherify', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
|
||
|
|
|
||
|
|
mesh.morphTargetInfluences[ 0 ] = value;
|
||
|
|
|
||
|
|
} );
|
||
|
|
gui.add( params, 'Twist', 0, 1 ).step( 0.01 ).onChange( function ( value ) {
|
||
|
|
|
||
|
|
mesh.morphTargetInfluences[ 1 ] = value;
|
||
|
|
|
||
|
|
} );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onWindowResize() {
|
||
|
|
|
||
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|