History Repeating

马黑黑 · 发表于 2025-7-1 20:21

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马黑黑 · 发表于 2025-7-1 20:21

帖子代码

<style>
#papa { margin: 30px 0; left: calc(50% - 81px); transform: translateX(-50%); width: clamp(600px, 90vw, 1400px); height: auto; aspect-ratio: 16/9; background: snow url('https://638183.freep.cn/638183/t24/w4/galaxy.webp') no-repeat center/cover; box-shadow: 2px 2px 8px #000; display: grid; place-items: center; z-index: 1; position: relative; }
#btnFs { bottom: 30px; color: cyan; border-color: cyan !important; }
#player { position: absolute; width: 10vw; height: 10vw; border-radius: 50%; filter: drop-shadow(0 0 80px #000) opacity(0.5); cursor: pointer; z-index: 2; animation: rot 8s linear infinite var(--state); }
#vid {position: absolute; width: 100%; height: 100%; object-fit: cover; mask: radial-gradient(transparent 20%, red); -webkit-mask: radial-gradient(transparent 20%, red); opacity: .6; pointer-events: none; }
@keyframes rot { to { transform: rotate(360deg); } }
</style>
<div id="papa">
<audio id="aud" src="https://music.163.com/song/media/outer/url?id=1971315292" autoplay loop></audio>
<video id="vid" src="https://bpic.588ku.com/video_listen/588ku_video/25/03/24/13/59/29/video67e0f4c17e4d2.mp4" autoplay loop muted></video>
<img id="player" src="https://638183.freep.cn/638183/small/2025/b3.webp" title="播放/暂停" alt="" />
</div>
<script type="module">
import { THREE, scene, camera, renderer, clock, basic3 } from 'https://638183.freep.cn/638183/3dev/3/3basic.js?v=1.0';
import TWEEN from 'https://638183.freep.cn/638183/3dev/examples/jsm/libs/tween.module.js';
import { FS } from 'https://638183.freep.cn/638183/web/ku/FS.js';
basic3(papa, aud.paused);
const texture = new THREE.TextureLoader().load(`data:image/svg+xml;charset=utf-8, <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 32 32"><circle cx="16" cy="16" r="14" fill="white"/></svg>`);
texture.colorSpace = THREE.SRGBColorSpace;
texture.center.set(0.5,0.5);
const geometry1 = new THREE.SphereGeometry(0.5, 32, 32); // 几何体1
geometry1.translate(-1.5, -1, 0);
geometry1.rotateX(Math.PI / 6);
const geometry2 = new THREE.SphereGeometry(0.5, 32, 32); // 几何体2
geometry2.translate(1.5, 1, 1);
geometry2.rotateX(-Math.PI / 6);
const startPositions = geometry1.attributes.position;
const endPositions = geometry2.attributes.position;
const pointsGeometry = new THREE.BufferGeometry();
pointsGeometry.setAttribute('position', startPositions);
const pointsMaterial = new THREE.PointsMaterial({ map: texture, size: 0.1, transparent: true });
const points = new THREE.Points(pointsGeometry, pointsMaterial);
scene.add(points);
const total = startPositions.count;
for(let i = 0; i < total; i++) {
const tween = new TWEEN.Tween(startPositions.array)
.to({
[i * 3]: endPositions.array[(total - i - 1) * 3],
[i * 3 + 1]: endPositions.array[(total -i - 1) * 3 + 1],
[i * 3 + 2]: endPositions.array[(total -i - 1) * 3 + 2]
}, 5000 * Math.random() + 5000)
.delay(2000)
.easing(TWEEN.Easing.Exponential.Out)
.onUpdate(() => startPositions.needsUpdate = true)
.repeat(Infinity)
.repeatDelay(1500)
.yoyo(3000)
.start();
}
const animate = () => {
TWEEN.update();
const delta = clock.getDelta();
points.rotation.z += delta / 5;
points.rotation.y += delta / 5;
renderer.render(scene, camera);
requestAnimationFrame(animate);
};
const tweens = TWEEN.getAll();
aud.onplaying = aud.onpause = () => {
tweens.forEach(tween => aud.paused ? tween.pause() : tween.resume());
aud.paused ? clock.stop() : clock.start();
};
animate();
FS(papa, player);
</script>

复制代码

马黑黑 · 发表于 2025-7-1 20:21

本帖最后由马黑黑于 2025-7-1 20:35 编辑

历史是今天对昨天的重复，但不是简单的重复。

帖子也差不多：总有一点点变革。

本帖：

一、使用了SVG做粒子的纹理贴图。很简单，在SVG里画一个圆，然后将SVG弄成 base64 编码数据的图片，然后加载为纹理；

二、为了能让几何体加载纹理摆脱矩形模样，得创建一个缓冲几何体 Buffergeometry，并将从ThreeJS内置几何体之一获得的顶点数据赋予它，酱紫点云材质就具备了纹理的圆形形状；

三、缓冲几何体+点云材质构建的图像在 z、y 轴上的旋转，点云的点做tween运动，运动形式华丽丽；

四、播放器回归HTML元素，它设置一定的透明度，酱紫，点云粒子好像穿过它而在两地间交换。