效果图
页面预览链接(服务器配置比较低，加载视频会比较慢，请耐心等候)：https://static-8f957b23-c692-...
相关链接整理
需要实现的功能点
1. 使用blender3d建模导出一个展馆模型，人物模型。
2. 使用threejs技术导入展馆模型、把视频贴在模型的集合上显示。
3. 导入人物模型，监听键盘事件让人物行动起来。
4. 碰撞检测。
blender导出模型
具体怎么使用blender制作3d模型可以看我的b站链接详细教学：https://www.bilibili.com/video/BV18K41127yq/?vd_source=1f95e9c4449f30df3c017d0e5a4cdd66
threejs创建场景、光线、相机、渲染器
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.01, 200);
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.shadowMap.enabled = true;
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
camera.position.set(5, 10, 25);
scene.background = new THREE.Color(0.2, 0.2, 0.2);
const ambientLight = new THREE.AmbientLight(0xffffff, 0.1);
scene.add(ambientLight);//环境光没有方向
const directionLight = new THREE.DirectionalLight(0xffffff, 0.2);
scene.add(directionLight);threejs导入视频并在场馆集合贴图
new GLTFLoader().load('../resources/models/zg.glb', (gltf) => {
// console.log(gltf);
scene.add(gltf.scene);
const video02 = document.createElement('video');
video02.src = "./resources/video02.mp4" ;
video02.muted = true;
video02.autoplay = "autoplay";
video02.loop = true;
video02.play();
gltf.scene.traverse((child) => {
// console.log(child.name);
child.castShadow = true;
child.receiveShadow = true;
if (child.name === '2023') {
const video = document.createElement('video');
video.src = "./resources/yanhua.mp4";
video.muted = true;
video.autoplay = "autoplay";
video.loop = true;
video.play();
const videoTexture = new THREE.VideoTexture(video);
const videoMaterial = new THREE.MeshBasicMaterial({ map: videoTexture });
child.material = videoMaterial;
}
if (child.name === '大屏幕01' ) {
const video = document.createElement('video');
video.src = "./resources/video01.mp4";
video.muted = true;
video.autoplay = "autoplay";
video.loop = true;
video.play();
const videoTexture = new THREE.VideoTexture(video);
const videoMaterial = new THREE.MeshBasicMaterial({ map: videoTexture });
child.material = videoMaterial;
}
if (child.name === '曲面屏幕01'||child.name === '曲面屏幕02'||child.name === '操作台') {
const videoTexture = new THREE.VideoTexture(video02);
const videoMaterial = new THREE.MeshBasicMaterial({ map: videoTexture });
child.material = videoMaterial;
}
})
mixer = new THREE.AnimationMixer(gltf.scene);
const clips = gltf.animations; // 播放所有动画
clips.forEach(function (clip) {
const action = mixer.clipAction(clip);
action.loop = THREE.LoopOnce;
// 停在最后一帧
action.clampWhenFinished = true;
action.play();
});
})threejs导入人物模型，监听键盘事件控制人物的行动，碰撞检测
new THREE.Raycaster（）是射线碰撞检测的对象，当人物面向的方向有物体的时候，collisionResultsFrontObjs 的数组就为空。
let playerMesh;
let actionWalk, actionIdle;
const lookTarget = new THREE.Vector3(0, 2, 0);
new GLTFLoader().load('../resources/models/player.glb', (gltf) => {
playerMesh = gltf.scene;
scene.add(gltf.scene);
playerMesh.traverse((child)=>{
child.receiveShadow = true;
child.castShadow = true;
})
playerMesh.position.set(0, 0, 11.5);
playerMesh.rotateY(Math.PI);
playerMesh.add(camera);
camera.position.set(0, 2, -5);
camera.lookAt(lookTarget);
const pointLight = new THREE.PointLight(0xffffff, 1.5);
playerMesh.add(pointLight);
pointLight.position.set(0, 1.8, -1);
playerMixer = new THREE.AnimationMixer(gltf.scene);
const clipWalk = THREE.AnimationUtils.subclip(gltf.animations[0], 'walk', 0, 30);
actionWalk = playerMixer.clipAction(clipWalk);
// actionWalk.play();
const clipIdle = THREE.AnimationUtils.subclip(gltf.animations[0], 'idle', 31, 281);
actionIdle = playerMixer.clipAction(clipIdle);
actionIdle.play();
// const clips = gltf.animations; // 播放所有动画
// clips.forEach(function (clip) {
// const action = mixer.clipAction(clip);
// action.loop = THREE.LoopOnce;
// // 停在最后一帧
// action.clampWhenFinished = true;
// action.play();
// });
});
let isWalk = false;
const playerHalfHeight = new THREE.Vector3(0, 0.8, 0);
window.addEventListener('keydown', (e) => {
if (e.key === 'w') {
// playerMesh.translateZ(0.1);
const curPos = playerMesh.position.clone();
playerMesh.translateZ(1);
const frontPos = playerMesh.position.clone();
playerMesh.translateZ(-1);
const frontVector3 = frontPos.sub(curPos).normalize()
const raycasterFront = new THREE.Raycaster(playerMesh.position.clone().add(playerHalfHeight), frontVector3);
const collisionResultsFrontObjs = raycasterFront.intersectObjects(scene.children);
console.log(collisionResultsFrontObjs);
if (collisionResultsFrontObjs && collisionResultsFrontObjs[0] && collisionResultsFrontObjs[0].distance > 1) {
playerMesh.translateZ(1);
}
if (!isWalk) {
crossPlay(actionIdle, actionWalk);
isWalk = true;
}
}
if (e.key === 's') {
// const curPos = playerMesh.position.clone();
playerMesh.translateZ(-1);
// const frontPos = playerMesh.position.clone();
// playerMesh.translateZ(1);
// const frontVector3 = frontPos.sub(curPos).normalize()
// const raycasterFront = new THREE.Raycaster(playerMesh.position.clone().add(playerHalfHeight), frontVector3);
// const collisionResultsFrontObjs = raycasterFront.intersectObjects(scene.children);
// console.log(collisionResultsFrontObjs);
// if (collisionResultsFrontObjs && collisionResultsFrontObjs[0] && collisionResultsFrontObjs[0].distance > 1) {
// playerMesh.translateZ(-1);
// }
if (!isWalk) {
crossPlay(actionIdle, actionWalk);
isWalk = true;
}
}
})
window.addEventListener('keyup', (e) => {
if (e.key === 'w'||e.key === 's') {
crossPlay(actionWalk, actionIdle);
isWalk = false;
}
});
let preClientX;
window.addEventListener('mousemove', (e) => {
if (preClientX && playerMesh) {
playerMesh.rotateY(-(e.clientX - preClientX) * 0.01);
}
preClientX = e.clientX;
});总结
这次通过学习项目后，我对blender建模、threejs有了初步的认识，基本可以自己手撸一个展厅平台。
最后推荐下大帅老师，确实很厉害，干货多多； 在公众号里搜 大帅老猿，他做技术外包很靠谱，感兴趣的可以加入猿创营 (v:dashuailaoyuan)，一起交流学习。