FBX Animations

Video Lecture

FBX Animations FBX Animations

Description

In this exercise, we import a different FBX model, and we also import several animation clips for the model. We then create buttons to smoothly transition the model between each animation clip.

Note

For this exercise, you should download the model "Vanguard By T. Choonyung" from Mixamo and save it into your ./dist/client/models folder. Save it using the options FBX(.fbx) and T-Pose.

Also download the animations, rename them and save them into your ./dist/client/models folder. Save them using the options FBX(.fbx) and Without Skin.

  • Samba Dancing (In Place Version) --> Save as vanguard@samba.fbx
  • Belly Dancing --> Save as vanguard@bellydance.fbx
  • Goofy Running --> Save as vanguard@goofyrunning.fbx

Start Code

./src/server/server.ts

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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/FBXLoader', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/loaders/FBXLoader.js')))
        app.use('/jsm/libs/inflate.module.min.js', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/inflate.module.min.js')))
        app.use('/jsm/curves/NURBSCurve.js', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/curves/NURBSCurve.js')))
        app.use('/jsm/curves/NURBSUtils.js', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/curves/NURBSUtils.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')))

        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

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import * as THREE from '/build/three.module.js'
import { OrbitControls } from '/jsm/controls/OrbitControls'
import { FBXLoader } from '/jsm/loaders/FBXLoader'
import Stats from '/jsm/libs/stats.module'
import { GUI } from '/jsm/libs/dat.gui.module'

const scene: THREE.Scene = new THREE.Scene()
const axesHelper = new THREE.AxesHelper(5)
scene.add(axesHelper)

var light = new THREE.PointLight();
light.position.set(2.5, 7.5, 15)
scene.add(light);

const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000)
camera.position.set(0.8, 1.4, 1.0)

const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

const controls = new OrbitControls(camera, renderer.domElement)
controls.screenSpacePanning = true
controls.target.set(0, 1, 0)

let mixer: THREE.AnimationMixer
let modelReady = false;
let animationActions: THREE.AnimationAction[] = []
let activeAction: THREE.AnimationAction
let lastAction: THREE.AnimationAction
const fbxLoader: FBXLoader = new FBXLoader();

fbxLoader.load(
    'models/vanguard_t_choonyung.fbx',
    (object) => {
        object.scale.set(.01, .01, .01)
        mixer = new THREE.AnimationMixer(object);

        let animationAction = mixer.clipAction((object as any).animations[0]);
        animationActions.push(animationAction)
        animationsFolder.add(animations, "default")
        activeAction = animationActions[0]

        scene.add(object);

        //add an animation from another file
        // fbxLoader.load('models/vanguard@samba.fbx',
        //     (object) => {
        //         console.log("loaded samba")

        //         let animationAction = mixer.clipAction((object as any).animations[0]);
        //         animationActions.push(animationAction)         
        //         animationsFolder.add(animations, "samba")

        //         //add an animation from another file
        //         fbxLoader.load('models/vanguard@bellydance.fbx',
        //             (object) => {
        //                 console.log("loaded bellydance")
        //                 let animationAction = mixer.clipAction((object as any).animations[0]);
        //                 animationActions.push(animationAction)
        //                 animationsFolder.add(animations, "bellydance")

        //                 //add an animation from another file
        //                 fbxLoader.load('models/vanguard@goofyrunning.fbx',
        //                     (object) => {
        //                         console.log("loaded goofyrunning");
        //                         (object as any).animations[0].tracks.shift() //delete the specific track that moves the object forward while running
        //                         //console.dir((object as any).animations[0])
        //                         let animationAction = mixer.clipAction((object 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 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(1)
        activeAction.reset()
        //activeAction.fadeIn(1)
        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());

    render()

    stats.update()
};

function render() {
    renderer.render(scene, camera)
}
animate();

Final Code

./src/client/client.ts

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import * as THREE from '/build/three.module.js'
import { OrbitControls } from '/jsm/controls/OrbitControls'
import { FBXLoader } from '/jsm/loaders/FBXLoader'
import Stats from '/jsm/libs/stats.module'
import { GUI } from '/jsm/libs/dat.gui.module'

const scene: THREE.Scene = new THREE.Scene()
const axesHelper = new THREE.AxesHelper(5)
scene.add(axesHelper)

var light = new THREE.PointLight();
light.position.set(2.5, 7.5, 15)
scene.add(light);

const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000)
camera.position.set(0.8, 1.4, 1.0)

const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

const controls = new OrbitControls(camera, renderer.domElement)
controls.screenSpacePanning = true
controls.target.set(0, 1, 0)

let mixer: THREE.AnimationMixer
let modelReady = false;
let animationActions: THREE.AnimationAction[] = []
let activeAction: THREE.AnimationAction
let lastAction: THREE.AnimationAction
const fbxLoader: FBXLoader = new FBXLoader();

fbxLoader.load(
    'models/vanguard_t_choonyung.fbx',
    (object) => {
        object.scale.set(.01, .01, .01)
        mixer = new THREE.AnimationMixer(object);

        let animationAction = mixer.clipAction((object as any).animations[0]);
        animationActions.push(animationAction)
        animationsFolder.add(animations, "default")
        activeAction = animationActions[0]

        scene.add(object);

        //add an animation from another file
        fbxLoader.load('models/vanguard@samba.fbx',
            (object) => {
                console.log("loaded samba")

                let animationAction = mixer.clipAction((object as any).animations[0]);
                animationActions.push(animationAction)         
                animationsFolder.add(animations, "samba")

                //add an animation from another file
                fbxLoader.load('models/vanguard@bellydance.fbx',
                    (object) => {
                        console.log("loaded bellydance")
                        let animationAction = mixer.clipAction((object as any).animations[0]);
                        animationActions.push(animationAction)
                        animationsFolder.add(animations, "bellydance")

                        //add an animation from another file
                        fbxLoader.load('models/vanguard@goofyrunning.fbx',
                            (object) => {
                                console.log("loaded goofyrunning");
                                (object as any).animations[0].tracks.shift()
                                //console.dir((object as any).animations[0])
                                let animationAction = mixer.clipAction((object as any).animations[0]);
                                animationActions.push(animationAction)
                                animationsFolder.add(animations, "goofyrunning")
                                //console.dir(animationAction)

                                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 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(1)
        activeAction.reset()
        activeAction.fadeIn(1)
        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());

    render()

    stats.update()
};

function render() {
    renderer.render(scene, camera)
}
animate();

Mixamo

https://threejs.org/docs/#api/en/animation/AnimationMixer

https://threejs.org/docs/#api/en/animation/KeyframeTrack