万马奔腾

马黑黑 · 发表于 2025-5-5 09:51

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马黑黑 · 发表于 2025-5-5 09:58

帖子代码：

<style>
#tz { --state: running; margin: 30px 0; left: calc(50% - 81px); transform: translateX(-50%); width: clamp(600px, 90vw, 1400px); min-height: 80vh; aspect-ratio: 16/9; background: #99ddff; box-shadow: 2px 2px 10px rgba(0,0,0,.65); z-index: 1; position: relative; }
#player { position: absolute; left: 20px; top: 20px; z-index: 9; clip-path: circle(45%); transition: filter .7s; cursor: pointer; transform-origin: 50% 100%; animation: swear 1s infinite alternate linear var(--state); }
#player:hover { filter: hue-rotate(120deg); }
#btnFs { right: 30px; top: 30px; color: #eee; }
#btnFs:hover { color: red; }
@keyframes swear {
30% { transform: rotate(-6deg); }
80% { transform: rotate(6deg); }
}
</style>
<div id="tz">
<audio id="aud" src="https://music.163.com/song/media/outer/url?id=534750252" autoplay loop></audio>
<img id="player" src="https://638183.freep.cn/638183/small/260.webp" width="10%" title="播放/暂停" />
</div>
<script type="importmap">
{
"imports": {
"three": "https://esm.sh/three@0.176.0?target=es2022",
"three/addons/": "https://esm.sh/three@0.176.0/addons/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { FS } from 'https://638183.freep.cn/638183/web/ku/fscreen.js';
let camera, scene, renderer, mesh, mixer, dummy;
const offset = 5000;
const timeOffsets = new Float32Array( 1024 );
for (let x = 0; x < 1024; x ++) {
timeOffsets[x] = Math.random() * 3;
}
const clock = new THREE.Clock(true);
init();
function init() {
camera = new THREE.PerspectiveCamera(60, tz.offsetWidth / tz.offsetHeight, 100, 10000);
scene = new THREE.Scene();
scene.background = new THREE.Color(0x99DDFF);
scene.fog = new THREE.Fog(0x99DDFF, 5000, 10000);
const light = new THREE.DirectionalLight(0xffffff, 1);
light.position.set(200, 1000, 50);
light.castShadow = true;
light.shadow.camera.left = - 5000;
light.shadow.camera.right = 5000;
light.shadow.camera.top = 5000;
light.shadow.camera.bottom = - 5000;
light.shadow.camera.far = 2000;
light.shadow.bias = - 0.01;
light.shadow.camera.updateProjectionMatrix();
scene.add(light);
const hemi = new THREE.HemisphereLight(0x99DDFF, 0x669933, 1 / 3);
scene.add(hemi);
const ground = new THREE.Mesh(
new THREE.PlaneGeometry(1000000, 1000000),
new THREE.MeshStandardMaterial({color: 0x669933, depthWrite: true})
);
ground.rotation.x = - Math.PI / 2;
ground.receiveShadow = true;
scene.add(ground);
const loader = new GLTFLoader();
loader.load('https://638183.freep.cn/638183/web/3models/Horse.glb', function (glb) {
dummy = glb.scene.children[0];
mesh = new THREE.InstancedMesh(dummy.geometry, dummy.material, 1024);
mesh.castShadow = true;
for (let x = 0, i = 0; x < 32; x ++) {
for (let y = 0; y < 32; y ++) {
dummy.position.set(offset - 300 * x + 200 * Math.random(), 0, offset - 300 * y);
dummy.updateMatrix();
mesh.setMatrixAt(i, dummy.matrix);
mesh.setColorAt(i, new THREE.Color( `hsl(${Math.random() * 360}, 50%, 66%)`));
i ++;
}
}
scene.add(mesh);
mixer = new THREE.AnimationMixer(glb.scene);
const action = mixer.clipAction(glb.animations[0]);
action.play();
tz.onclick = () => action.paused = aud.paused; //马停
});
renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(tz.offsetWidth, tz.offsetHeight);
renderer.setAnimationLoop(animate);
tz.appendChild(renderer.domElement);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.VSMShadowMap;
window.addEventListener('resize', onWindowResize);
}
function onWindowResize() {
camera.aspect = tz.offsetWidth / tz.offsetHeight;
camera.updateProjectionMatrix();
renderer.setSize(tz.offsetWidth, tz.offsetHeight);
}
function animate() {
//if (aud.paused) return; //动画停
render();
}
function render() {
const time = clock.getElapsedTime();
const r = 3000;
camera.position.set(Math.sin(time / 10) * r, 1500 + 1000 * Math.cos(time / 5), Math.cos(time / 10) * r);
camera.lookAt(0, 0, 0);
if (mesh) {
for (let x = 0; x < 1024; x ++) {
mixer.setTime(time + timeOffsets[x]);
mesh.setMorphAt(x, dummy);
}
mesh.morphTexture.needsUpdate = true;
}
renderer.render(scene, camera);
}
FS(tz, player);
</script>

复制代码

动态效果源自 three.js 的一个示例，马匹建模是 three.js 官方开源的数据。JS资源借用 esm.sh 上的部署。

我在代码中加入马匹奔跑、暂停的机制。若需要整个动画都可以暂停、继续，可以解开下面代码的注释：

//if (aud.paused) return; //动画停

同时，将马匹暂停、继续的代码注释掉：

tz.onclick = () => action.paused = aud.paused; //马停

整个动画暂停/继续机制不是很理想，表现在继续的时候，由于动画渲染的速度太快，衔接有点突兀。