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webgl_animation_skinning_ik.html
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webgl_animation_skinning_ik.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - animation - skinning - ik</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<meta name="author" content="Antoine BERNIER (abernier)" />
<link type="text/css" rel="stylesheet" href="main.css">
<style>
body {color:white;}
#info a {
color:#4d6675;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl - inverse kinematics<br />
Character model by <a href="https://assetstore.unity.com/packages/3d/characters/humanoids/humans/kira-lowpoly-character-100303" target="_blank" rel="noopener">Aki</a>, furnitures from <a href="https://poly.pizza" target="_blank" rel="noopener">poly.pizza</a>, scene by <a href="https://abernier.name/three.js/examples/webgl_esher.html" target="_blank" rel="noopener">abernier</a>. CC0.
</div>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { TransformControls } from 'three/addons/controls/TransformControls.js';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
import { CCDIKSolver, CCDIKHelper } from './jsm/animation/CCDIKSolver.js';
import Stats from 'three/addons/libs/stats.module.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
let scene, camera, renderer, orbitControls, transformControls;
let mirrorSphereCamera;
const OOI = {};
let IKSolver;
let stats, gui, conf;
const v0 = new THREE.Vector3();
init();
async function init() {
conf = {
followSphere: false,
turnHead: true,
ik_solver: true,
update: updateIK
};
scene = new THREE.Scene();
scene.fog = new THREE.FogExp2( 0xffffff, .17 );
scene.background = new THREE.Color( 0xffffff );
camera = new THREE.PerspectiveCamera( 55, window.innerWidth / window.innerHeight, 0.001, 5000 );
camera.position.set( 0.9728517749133652, 1.1044765132727201, 0.7316689528482836 );
camera.lookAt( scene.position );
const ambientLight = new THREE.AmbientLight( 0xffffff, 8 ); // soft white light
scene.add( ambientLight );
const dracoLoader = new DRACOLoader();
dracoLoader.setDecoderPath( 'jsm/libs/draco/' );
const gltfLoader = new GLTFLoader();
gltfLoader.setDRACOLoader( dracoLoader );
const gltf = await gltfLoader.loadAsync( 'models/gltf/kira.glb' );
gltf.scene.traverse( n => {
if ( n.name === 'head' ) OOI.head = n;
if ( n.name === 'lowerarm_l' ) OOI.lowerarm_l = n;
if ( n.name === 'Upperarm_l' ) OOI.Upperarm_l = n;
if ( n.name === 'hand_l' ) OOI.hand_l = n;
if ( n.name === 'target_hand_l' ) OOI.target_hand_l = n;
if ( n.name === 'boule' ) OOI.sphere = n;
if ( n.name === 'Kira_Shirt_left' ) OOI.kira = n;
} );
scene.add( gltf.scene );
const targetPosition = OOI.sphere.position.clone(); // for orbit controls
OOI.hand_l.attach( OOI.sphere );
// mirror sphere cube-camera
const cubeRenderTarget = new THREE.WebGLCubeRenderTarget( 1024 );
mirrorSphereCamera = new THREE.CubeCamera( 0.05, 50, cubeRenderTarget );
scene.add( mirrorSphereCamera );
const mirrorSphereMaterial = new THREE.MeshBasicMaterial( { envMap: cubeRenderTarget.texture } );
OOI.sphere.material = mirrorSphereMaterial;
OOI.kira.add( OOI.kira.skeleton.bones[ 0 ] );
const iks = [
{
target: 22, // "target_hand_l"
effector: 6, // "hand_l"
links: [
{
index: 5, // "lowerarm_l"
rotationMin: new THREE.Vector3( 1.2, - 1.8, - .4 ),
rotationMax: new THREE.Vector3( 1.7, - 1.1, .3 )
},
{
index: 4, // "Upperarm_l"
rotationMin: new THREE.Vector3( 0.1, - 0.7, - 1.8 ),
rotationMax: new THREE.Vector3( 1.1, 0, - 1.4 )
},
],
}
];
IKSolver = new CCDIKSolver( OOI.kira, iks );
const ccdikhelper = new CCDIKHelper( OOI.kira, iks, 0.01 );
scene.add( ccdikhelper );
gui = new GUI();
gui.add( conf, 'followSphere' ).name( 'follow sphere' );
gui.add( conf, 'turnHead' ).name( 'turn head' );
gui.add( conf, 'ik_solver' ).name( 'IK auto update' );
gui.add( conf, 'update' ).name( 'IK manual update()' );
gui.open();
//
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setAnimationLoop( animate );
document.body.appendChild( renderer.domElement );
//
orbitControls = new OrbitControls( camera, renderer.domElement );
orbitControls.minDistance = 0.2;
orbitControls.maxDistance = 1.5;
orbitControls.enableDamping = true;
orbitControls.target.copy( targetPosition );
transformControls = new TransformControls( camera, renderer.domElement );
transformControls.size = 0.75;
transformControls.showX = false;
transformControls.space = 'world';
transformControls.attach( OOI.target_hand_l );
scene.add( transformControls );
// disable orbitControls while using transformControls
transformControls.addEventListener( 'mouseDown', () => orbitControls.enabled = false );
transformControls.addEventListener( 'mouseUp', () => orbitControls.enabled = true );
//
stats = new Stats();
document.body.appendChild( stats.dom );
window.addEventListener( 'resize', onWindowResize, false );
}
function animate( ) {
if ( OOI.sphere && mirrorSphereCamera ) {
OOI.sphere.visible = false;
OOI.sphere.getWorldPosition( mirrorSphereCamera.position );
mirrorSphereCamera.update( renderer, scene );
OOI.sphere.visible = true;
}
if ( OOI.sphere && conf.followSphere ) {
// orbitControls follows the sphere
OOI.sphere.getWorldPosition( v0 );
orbitControls.target.lerp( v0, 0.1 );
}
if ( OOI.head && OOI.sphere && conf.turnHead ) {
// turn head
OOI.sphere.getWorldPosition( v0 );
OOI.head.lookAt( v0 );
OOI.head.rotation.set( OOI.head.rotation.x, OOI.head.rotation.y + Math.PI, OOI.head.rotation.z );
}
if ( conf.ik_solver ) {
updateIK();
}
orbitControls.update();
renderer.render( scene, camera );
stats.update(); // fps stats
}
function updateIK() {
if ( IKSolver ) IKSolver.update();
scene.traverse( function ( object ) {
if ( object.isSkinnedMesh ) object.computeBoundingSphere();
} );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
</script>
</body>
</html>