Using tween.js with the THREE.AnimationMixer
Video Lecture
Description
In this lesson, I will demonstrate using a mixture of the concepts demonstrated in the previous lessons GLTF Animations, Raycaster, tween.js and SpotLight Shadow
I will import a GLTF model, import several animations clips, add the RayCaster and tween the location of the GLTF model to the clicked mouse coordinates so that the model animates to the new location.
Start Code
./src/server/server.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | import express from "express" import path from "path" import http from "http" const port: number = 3000 class App { private server: http.Server private port: number constructor(port: number) { this.port = port const app = express() app.use(express.static(path.join(__dirname, '../client'))) app.use('/build/three.module.js', express.static(path.join(__dirname, '../../node_modules/three/build/three.module.js'))) app.use('/jsm/controls/OrbitControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/OrbitControls.js'))) app.use('/jsm/loaders/GLTFLoader', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/loaders/GLTFLoader.js'))) app.use('/jsm/libs/stats.module', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/stats.module.js'))) app.use('/jsm/libs/dat.gui.module', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/dat.gui.module.js'))) app.use('/jsm/libs/tween.module.min', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/tween.module.min.js'))) this.server = new http.Server(app); } public Start() { this.server.listen(this.port, () => { console.log( `Server listening on port ${this.port}.` ) }) } } new App(port).Start() |
./src/client/client.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 | import * as THREE from '/build/three.module.js' import { OrbitControls } from '/jsm/controls/OrbitControls' import { GLTFLoader } from '/jsm/loaders/GLTFLoader' import Stats from '/jsm/libs/stats.module' import { GUI } from '/jsm/libs/dat.gui.module' import { TWEEN } from '/jsm/libs/tween.module.min' const scene: THREE.Scene = new THREE.Scene() const axesHelper = new THREE.AxesHelper(5) scene.add(axesHelper) var light1 = new THREE.PointLight(); //new THREE.SpotLight(); light1.position.set(2.5, 5, 2.5) // light1.angle = Math.PI / 8 // light1.penumbra = 0.5 // light1.castShadow = true; // light1.shadow.mapSize.width = 1024; // light1.shadow.mapSize.height = 1024; // light1.shadow.camera.near = 0.5; // light1.shadow.camera.far = 20 scene.add(light1); var light2 = new THREE.PointLight(); //new THREE.SpotLight(); light2.position.set(-2.5, 5, 2.5) // light2.angle = Math.PI / 8 // light2.penumbra = 0.5 // light2.castShadow = true; // light2.shadow.mapSize.width = 1024; // light2.shadow.mapSize.height = 1024; // light2.shadow.camera.near = 0.5; // light2.shadow.camera.far = 20 scene.add(light2); const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.01, 1000) camera.position.set(0.8, 1.4, 1.0) const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer() renderer.setSize(window.innerWidth, window.innerHeight) //renderer.shadowMap.enabled = true document.body.appendChild(renderer.domElement) const controls = new OrbitControls(camera, renderer.domElement) controls.screenSpacePanning = true controls.target.set(0, 1, 0) // let sceneMeshes = new Array() // const planeGeometry: THREE.PlaneGeometry = new THREE.PlaneGeometry(25, 25) // const texture = new THREE.TextureLoader().load("img/grid.png") // const plane: THREE.Mesh = new THREE.Mesh(planeGeometry, new THREE.MeshPhongMaterial({ map: texture })) // plane.rotateX(-Math.PI / 2) // plane.receiveShadow = true // scene.add(plane) // sceneMeshes.push(plane) let mixer: THREE.AnimationMixer let modelReady = false //let modelMesh: THREE.Object3D let animationActions: THREE.AnimationAction[] = new Array() let activeAction: THREE.AnimationAction let lastAction: THREE.AnimationAction const gltfLoader: GLTFLoader = new GLTFLoader(); gltfLoader.load( 'models/vanguard.glb', (gltf) => { // gltf.scene.traverse(function (child) { // if ((<THREE.Mesh>child).isMesh) { // let m = <THREE.Mesh>child // m.castShadow = true // //m.frustumCulled = false; // //m.geometry.computeVertexNormals() // } // }) mixer = new THREE.AnimationMixer(gltf.scene) let animationAction = mixer.clipAction((gltf as any).animations[0]) animationActions.push(animationAction) animationsFolder.add(animations, "default") activeAction = animationActions[0] scene.add(gltf.scene); //modelMesh = gltf.scene //add an animation from another file gltfLoader.load('models/vanguard@samba.glb', (gltf) => { console.log("loaded samba") let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "samba") //add an animation from another file gltfLoader.load('models/vanguard@bellydance.glb', (gltf) => { console.log("loaded bellydance") let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "bellydance") //add an animation from another file gltfLoader.load('models/vanguard@goofyrunning.glb', (gltf) => { console.log("loaded goofyrunning"); (gltf as any).animations[0].tracks.shift() //delete the specific track that moves the object forward while running let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "goofyrunning") modelReady = true }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) window.addEventListener('resize', onWindowResize, false) function onWindowResize() { camera.aspect = window.innerWidth / window.innerHeight camera.updateProjectionMatrix() renderer.setSize(window.innerWidth, window.innerHeight) render() } // const raycaster = new THREE.Raycaster(); // //const targetQuaternion = new THREE.Quaternion() // renderer.domElement.addEventListener('dblclick', onDoubleClick, false); // function onDoubleClick(event) { // const mouse = { // x: (event.clientX / renderer.domElement.clientWidth) * 2 - 1, // y: -(event.clientY / renderer.domElement.clientHeight) * 2 + 1 // } // raycaster.setFromCamera(mouse, camera); // const intersects = raycaster.intersectObjects(sceneMeshes, false); // if (intersects.length > 0) { // const p = intersects[0].point // //const distance = modelMesh.position.distanceTo(p); // // const rotationMatrix = new THREE.Matrix4(); // // rotationMatrix.lookAt(p, modelMesh.position, modelMesh.up); // // targetQuaternion.setFromRotationMatrix(rotationMatrix); // // setAction(animationActions[3]) // //TWEEN.removeAll() // new TWEEN.Tween(modelMesh.position) // .to({ // x: p.x, // y: p.y, // z: p.z // }, 1000 ) /// 2 * distance) //walks 2 meters a second * the distance // // .onUpdate(() => { // // controls.target.set( // // modelMesh.position.x, // // modelMesh.position.y + 1, // // modelMesh.position.z) // // light1.target = modelMesh; // // light2.target = modelMesh; // // }) // .start() // //.onComplete(() => setAction(animationActions[2])) // } // } const stats = Stats() document.body.appendChild(stats.dom) var animations = { default: function () { setAction(animationActions[0]) }, samba: function () { setAction(animationActions[1]) }, bellydance: function () { setAction(animationActions[2]) }, goofyrunning: function () { setAction(animationActions[3]) }, } const setAction = (toAction: THREE.AnimationAction) => { if (toAction != activeAction) { lastAction = activeAction activeAction = toAction //lastAction.stop() lastAction.fadeOut(.2) activeAction.reset() activeAction.fadeIn(.2) activeAction.play() } } const gui = new GUI() const animationsFolder = gui.addFolder("Animations") animationsFolder.open() const clock: THREE.Clock = new THREE.Clock() var animate = function () { requestAnimationFrame(animate) controls.update() if (modelReady) { mixer.update(clock.getDelta()); // if (!modelMesh.quaternion.equals(targetQuaternion)) { // modelMesh.quaternion.rotateTowards(targetQuaternion, clock.getDelta() * 1000); // } } TWEEN.update(); render() stats.update() }; function render() { renderer.render(scene, camera) } animate(); |
Final Script
./src/client/client.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 | import * as THREE from '/build/three.module.js' import { OrbitControls } from '/jsm/controls/OrbitControls' import { GLTFLoader } from '/jsm/loaders/GLTFLoader' import Stats from '/jsm/libs/stats.module' import { GUI } from '/jsm/libs/dat.gui.module' import { TWEEN } from '/jsm/libs/tween.module.min' const scene: THREE.Scene = new THREE.Scene() const axesHelper = new THREE.AxesHelper(5) scene.add(axesHelper) var light1 = new THREE.SpotLight(); light1.position.set(2.5, 5, 2.5) light1.angle = Math.PI / 8 light1.penumbra = 0.5 light1.castShadow = true; light1.shadow.mapSize.width = 1024; light1.shadow.mapSize.height = 1024; light1.shadow.camera.near = 0.5; light1.shadow.camera.far = 20 scene.add(light1); var light2 = new THREE.SpotLight(); light2.position.set(-2.5, 5, 2.5) light2.angle = Math.PI / 8 light2.penumbra = 0.5 light2.castShadow = true; light2.shadow.mapSize.width = 1024; light2.shadow.mapSize.height = 1024; light2.shadow.camera.near = 0.5; light2.shadow.camera.far = 20 scene.add(light2); const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.01, 1000) camera.position.set(0.8, 1.4, 1.0) const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer() renderer.setSize(window.innerWidth, window.innerHeight) renderer.shadowMap.enabled = true document.body.appendChild(renderer.domElement) const controls = new OrbitControls(camera, renderer.domElement) controls.screenSpacePanning = true controls.target.set(0, 1, 0) let sceneMeshes = new Array() const planeGeometry: THREE.PlaneGeometry = new THREE.PlaneGeometry(25, 25) const texture = new THREE.TextureLoader().load("img/grid.png") const plane: THREE.Mesh = new THREE.Mesh(planeGeometry, new THREE.MeshPhongMaterial({ map: texture })) plane.rotateX(-Math.PI / 2) plane.receiveShadow = true scene.add(plane) sceneMeshes.push(plane) let mixer: THREE.AnimationMixer let modelReady = false let modelMesh: THREE.Object3D let animationActions: THREE.AnimationAction[] = new Array() let activeAction: THREE.AnimationAction let lastAction: THREE.AnimationAction const gltfLoader: GLTFLoader = new GLTFLoader(); gltfLoader.load( 'models/vanguard.glb', (gltf) => { gltf.scene.traverse(function (child) { if ((<THREE.Mesh>child).isMesh) { let m = <THREE.Mesh>child m.castShadow = true m.frustumCulled = false; m.geometry.computeVertexNormals() } }) mixer = new THREE.AnimationMixer(gltf.scene) let animationAction = mixer.clipAction((gltf as any).animations[0]) animationActions.push(animationAction) animationsFolder.add(animations, "default") activeAction = animationActions[0] scene.add(gltf.scene); modelMesh = gltf.scene //add an animation from another file gltfLoader.load('models/vanguard@samba.glb', (gltf) => { console.log("loaded samba") let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "samba") //add an animation from another file gltfLoader.load('models/vanguard@bellydance.glb', (gltf) => { console.log("loaded bellydance") let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "bellydance") //add an animation from another file gltfLoader.load('models/vanguard@goofyrunning.glb', (gltf) => { console.log("loaded goofyrunning"); (gltf as any).animations[0].tracks.shift() //delete the specific track that moves the object forward while running let animationAction = mixer.clipAction((gltf as any).animations[0]); animationActions.push(animationAction) animationsFolder.add(animations, "goofyrunning") modelReady = true }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) }, (xhr) => { console.log((xhr.loaded / xhr.total * 100) + '% loaded') }, (error) => { console.log(error); } ) window.addEventListener('resize', onWindowResize, false) function onWindowResize() { camera.aspect = window.innerWidth / window.innerHeight camera.updateProjectionMatrix() renderer.setSize(window.innerWidth, window.innerHeight) render() } const raycaster = new THREE.Raycaster(); const targetQuaternion = new THREE.Quaternion() renderer.domElement.addEventListener('dblclick', onDoubleClick, false); function onDoubleClick(event) { const mouse = { x: (event.clientX / renderer.domElement.clientWidth) * 2 - 1, y: -(event.clientY / renderer.domElement.clientHeight) * 2 + 1 } raycaster.setFromCamera(mouse, camera); const intersects = raycaster.intersectObjects(sceneMeshes, false); if (intersects.length > 0) { const p = intersects[0].point const distance = modelMesh.position.distanceTo(p); //modelMesh.lookAt(p) const rotationMatrix = new THREE.Matrix4(); rotationMatrix.lookAt(p, modelMesh.position, modelMesh.up); targetQuaternion.setFromRotationMatrix(rotationMatrix); setAction(animationActions[3]) TWEEN.removeAll() new TWEEN.Tween(modelMesh.position) .to({ x: p.x, y: p.y, z: p.z }, 1000 / 2.2 * distance) //walks 2 meters a second * the distance .onUpdate(() => { controls.target.set( modelMesh.position.x, modelMesh.position.y + 1, modelMesh.position.z) light1.target = modelMesh; light2.target = modelMesh; }) .start() .onComplete(() => { setAction(animationActions[2]) activeAction.clampWhenFinished = true; activeAction.loop = THREE.LoopOnce }) } } const stats = Stats() document.body.appendChild(stats.dom) var animations = { default: function () { setAction(animationActions[0]) }, samba: function () { setAction(animationActions[1]) }, bellydance: function () { setAction(animationActions[2]) }, goofyrunning: function () { setAction(animationActions[3]) }, } const setAction = (toAction: THREE.AnimationAction) => { if (toAction != activeAction) { lastAction = activeAction activeAction = toAction //lastAction.stop() lastAction.fadeOut(.2) activeAction.reset() activeAction.fadeIn(.2) activeAction.play() } } const gui = new GUI() const animationsFolder = gui.addFolder("Animations") animationsFolder.open() const clock: THREE.Clock = new THREE.Clock() var animate = function () { requestAnimationFrame(animate) controls.update() const delta = clock.getDelta() if (modelReady) { mixer.update(delta); if (!modelMesh.quaternion.equals(targetQuaternion)) { modelMesh.quaternion.rotateTowards(targetQuaternion, delta * 10); } } TWEEN.update(); render() stats.update() }; function render() { renderer.render(scene, camera) } animate(); |