threejs_r132.加载fbx模型示例

web/JavaScript threejs_r132.加载fbx模型示例

[div id = "box" /]
[script type = "module"]

let box = document.getElementById("box");
    box.width = 700;
    box.height = 500;

    // FBXLoader用到。https://github.com/mrdoob/three.js/tree/master/examples/js/libs/fflate.min.js
    let fflate_script = document.createElement("script");
    fflate_script.src = "https://github.com/mrdoob/three.js/tree/master/examples/js/libs/fflate.min.js";

    let three_script = document.createElement("script");
    three_script.src = "https://github.com/mrdoob/three.js/tree/master/build/three_r132_min.js";

    let head = document.getElementsByTagName("head")[0];
    head.appendChild(fflate_script);
    head.appendChild(three_script);

    three_script.onload = function () {
        create3d();
    };

    class FbxActor {
        constructor(scene) {
            this.scene = scene;
            this.position_x = 0;
            this.position_y = -100;
            this.position_z = 0;

            // 地面。光光的平面
            let mesh = new THREE.Mesh(
                new THREE.PlaneGeometry(2000, 2000),
                new THREE.MeshPhongMaterial({color: 0x999999, depthWrite: false}));
            mesh.rotation.x = -Math.PI / 2;
            mesh.position.x = this.position_x;
            mesh.position.y = this.position_y;
            mesh.position.z = this.position_z;
            mesh.receiveShadow = true;
            this.scene.add(mesh);

            // 格子。位置附在地面，看起来像是地板砖
            let grid = new THREE.GridHelper(2000, 20, 0x000000, 0x000000);
            grid.material.opacity = 0.2;
            grid.material.transparent = true;
            grid.position.x = this.position_x;
            grid.position.y = this.position_y;
            grid.position.z = this.position_z;
            this.scene.add(grid);
        }

        /**
         * @param callback 加载模型比较耗时，加载完毕后的回调函数
         */
        intoScence(callback) {
            let that = this;
            new THREE.FBXLoader()  // https://github.com/mrdoob/three.js/tree/master/examples/models/fbx
                .load("https://github.com/mrdoob/three.js/tree/master/examples/models/fbx/Samba Dancing.fbx", function (fbx) {
                    fbx.traverse(function (child) {
                        if (child.isMesh) {
                            child.castShadow = true;
                            child.receiveShadow = true;
                        }
                    });
                    fbx.translateY(0);
                    fbx.position.x = that.position_x;
                    fbx.position.y = that.position_y;
                    fbx.position.z = that.position_z;
                    that.scene.add(fbx);

                    let mixer = new THREE.AnimationMixer(fbx);
                    let action = mixer.clipAction(fbx.animations[0]);
                    action.play();

                    callback(mixer);
                });
        }
    }

    class LightManager {
        constructor(scene) {
            this.scene = scene;
        }
        addAmbientLight(color, intensity = 1) {
            let ambient = new THREE.AmbientLight(color, intensity);
            this.scene.add(ambient);
        }
        addDirrectionalLight(x, y, z, color, intensity = 1) {
            let directionalLight = new THREE.DirectionalLight(color, intensity);
            directionalLight.position.set(x, y, z);// 设置光源的方向
            this.scene.add(directionalLight);
        }
    }

    class CameraManager {
        constructor(scene, x = 0, y = 0, z = 0) {
            this.camera = new THREE.PerspectiveCamera(60, box.width / box.height);
            this.camera.position.set(x, y, z);  // 相机位置
            this.camera.lookAt(scene.position); // 相机方向(指向的场景对象)
        }

        setPosition(x, y, z) {
            this.camera.position.set(x, y, z); // 相机位置
        }

        lookAt(x, y, z) {
            this.camera.lookAt(new Vector3(x, y, z)); // 相机方向
        }
    }

    class Cinema {
        constructor(scene, camera, width = box.width, height = box.height, bkg_color = 0x7c8577) {
            this.scene = scene;
            this.camera = camera;

            this.renderer = new THREE.WebGLRenderer();
            this.renderer.setSize(width, height);
            this.renderer.setClearColor(bkg_color);
            this.renderer.shadowMap.enabled = true;

            box.appendChild(this.renderer.domElement);

            this.mixer = null;
        }

        setMixer(mixer) {
            this.mixer = mixer;
            this.clock = new THREE.Clock();
        }

        play() {
            this.renderer.render(this.scene, this.camera);
            requestAnimationFrame(this.play.bind(this));

            if (null !== this.mixer) {
                this.mixer.update(this.clock.getDelta()); // 渲染模型的动画
            }
        }
    }

    function create3d() {

        var scene = new THREE.Scene();
        scene.background = new THREE.Color(0xafafa0);
        scene.fog = new THREE.Fog( // background和fog配合产生远处的雾效
            0xafafa0, // color
            10,       // near
            1000);   // far

        let lightManager = new LightManager(scene);
        lightManager.addAmbientLight(0xffffff);
        lightManager.addDirrectionalLight(100, 50, 50, 0xffffff);

        let cameraManager = new CameraManager(scene);
        cameraManager.setPosition(0, 40, 260);

        let cinema = new Cinema(scene, cameraManager.camera);
        cinema.play();

        let controls = new THREE.OrbitControls(cameraManager.camera, cinema.renderer.domElement);

        let fbxActor = new FbxActor(scene);
        fbxActor.intoScence(function (mixer) {
            cinema.setMixer(mixer); // fbx模型动画
        });
    }

[/scrip]

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[div id = "box" /]

[script type = "module"]

let box = document.getElementById("box");

box.width = 700;

box.height = 500;

// FBXLoader用到。https://github.com/mrdoob/three.js/tree/master/examples/js/libs/fflate.min.js

let fflate_script = document.createElement("script");

fflate_script.src = "https://github.com/mrdoob/three.js/tree/master/examples/js/libs/fflate.min.js";

let three_script = document.createElement("script");

three_script.src = "https://github.com/mrdoob/three.js/tree/master/build/three_r132_min.js";

let head = document.getElementsByTagName("head")[0];

head.appendChild(fflate_script);

head.appendChild(three_script);

three_script.onload = function () {

create3d();

};

class FbxActor {

constructor(scene) {

this.scene = scene;

this.position_x = 0;

this.position_y = -100;

this.position_z = 0;

// 地面。光光的平面

let mesh = new THREE.Mesh(

new THREE.PlaneGeometry(2000, 2000),

new THREE.MeshPhongMaterial({color: 0x999999, depthWrite: false}));

mesh.rotation.x = -Math.PI / 2;

mesh.position.x = this.position_x;

mesh.position.y = this.position_y;

mesh.position.z = this.position_z;

mesh.receiveShadow = true;

this.scene.add(mesh);

// 格子。位置附在地面，看起来像是地板砖

let grid = new THREE.GridHelper(2000, 20, 0x000000, 0x000000);

grid.material.opacity = 0.2;

grid.material.transparent = true;

grid.position.x = this.position_x;

grid.position.y = this.position_y;

grid.position.z = this.position_z;

this.scene.add(grid);

}

/**

* @param callback 加载模型比较耗时，加载完毕后的回调函数

intoScence(callback) {

let that = this;

new THREE.FBXLoader() // https://github.com/mrdoob/three.js/tree/master/examples/models/fbx

.load("https://github.com/mrdoob/three.js/tree/master/examples/models/fbx/Samba Dancing.fbx", function (fbx) {

fbx.traverse(function (child) {

if (child.isMesh) {

child.castShadow = true;

child.receiveShadow = true;

}

});

fbx.translateY(0);

fbx.position.x = that.position_x;

fbx.position.y = that.position_y;

fbx.position.z = that.position_z;

that.scene.add(fbx);

let mixer = new THREE.AnimationMixer(fbx);

let action = mixer.clipAction(fbx.animations[0]);

action.play();

callback(mixer);

});

}

class LightManager {

constructor(scene) {

this.scene = scene;

}

addAmbientLight(color, intensity = 1) {

let ambient = new THREE.AmbientLight(color, intensity);

this.scene.add(ambient);

}

addDirrectionalLight(x, y, z, color, intensity = 1) {

let directionalLight = new THREE.DirectionalLight(color, intensity);

directionalLight.position.set(x, y, z);// 设置光源的方向

this.scene.add(directionalLight);

}

class CameraManager {

constructor(scene, x = 0, y = 0, z = 0) {

this.camera = new THREE.PerspectiveCamera(60, box.width / box.height);

this.camera.position.set(x, y, z); // 相机位置

this.camera.lookAt(scene.position); // 相机方向(指向的场景对象)

}

setPosition(x, y, z) {

this.camera.position.set(x, y, z); // 相机位置

}

lookAt(x, y, z) {

this.camera.lookAt(new Vector3(x, y, z)); // 相机方向

}

class Cinema {

constructor(scene, camera, width = box.width, height = box.height, bkg_color = 0x7c8577) {

this.scene = scene;

this.camera = camera;

this.renderer = new THREE.WebGLRenderer();

this.renderer.setSize(width, height);

this.renderer.setClearColor(bkg_color);

this.renderer.shadowMap.enabled = true;

box.appendChild(this.renderer.domElement);

this.mixer = null;

}

setMixer(mixer) {

this.mixer = mixer;

this.clock = new THREE.Clock();

}

play() {

this.renderer.render(this.scene, this.camera);

requestAnimationFrame(this.play.bind(this));

if (null !== this.mixer) {

this.mixer.update(this.clock.getDelta()); // 渲染模型的动画

}

function create3d() {

var scene = new THREE.Scene();

scene.background = new THREE.Color(0xafafa0);

scene.fog = new THREE.Fog( // background和fog配合产生远处的雾效

0xafafa0, // color

10, // near

1000); // far

let lightManager = new LightManager(scene);

lightManager.addAmbientLight(0xffffff);

lightManager.addDirrectionalLight(100, 50, 50, 0xffffff);

let cameraManager = new CameraManager(scene);

cameraManager.setPosition(0, 40, 260);

let cinema = new Cinema(scene, cameraManager.camera);

cinema.play();

let controls = new THREE.OrbitControls(cameraManager.camera, cinema.renderer.domElement);

let fbxActor = new FbxActor(scene);

fbxActor.intoScence(function (mixer) {

cinema.setMixer(mixer); // fbx模型动画

});

}

[/scrip]

- end

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