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Vue3 + threeJs 定义六种banner轮播图切换动画效果：百叶窗、手风琴、拼图、渐变、菱形波次、圆形扩展

news 2025/6/7 14:27:50

最近写了一个案例。用来丰富banner图的切换效果，css不是特别完美，所以采用的事threeJs的方式：
vue3 + threeJS
动画效果有：百叶窗、手风琴、拼图、渐变、菱形波次、圆形扩展动画:
以下是动画效果视频：

threeJS写banner切换效果（六个动画效果）

代码中已经做好了优化：
（1）窗口大小调整时更新渲染器和相机；
（2）浏览器切换到其他网页时，关闭定时器；浏览器切换回当前网页时，重新开始轮播。
（3）切换路由或组件卸载时调用，确保轮播定时器被清理。
（4）渲染采用ShaderMaterial材质：可以用于全屏显示图片，适用于轮播图、背景等场景，显示效果非常锐利、高清
（5）代码中注释清晰

整体逻辑：
1. 初始化场景、相机、渲染器。
1. 加载三张图片纹理，并设置纹理参数。
1. 定义六种动画效果：百叶窗、手风琴、拼图、渐变、菱形波次、圆形扩展。
1. 使用 setTimeout 控制每个效果的切换时间。
1. 使用 effectIndex 来控制当前使用的特效。
1. 使用 currentIndex 来控制当前显示的图片索引。
1. 使用 isFirstLoad 来判断是否是第一次加载，如果是，则直接显示第一张图片。
1. 每次切换效果时，先加载下一张图片的纹理，然后根据当前效果索引调用对应的动画函数。
1. 每个效果动画完成后，更新 currentFullMesh，并在最后一个效果后延时8000毫秒再开始下一轮。
1. 使用 requestAnimationFrame 实现渲染循环。
1. 使用 THREE.js 的 PlaneGeometry 和 ShaderMaterial 实现全屏高清效果。
1. 使用 THREE.js 的 TextureLoader 加载图片纹理，并设置纹理的编码、包裹方式和过滤方式。
1. 使用 THREE.js 的 PerspectiveCamera 实现透视相机。
1. 使用 THREE.js 的 WebGLRenderer 实现渲染器，并设置输出编码和色调映射。

以下是完整代码：

<template><div><div class="banner_box" ref="bannerBox"></div></div>
</template><script setup>
import { ref, onMounted, onUnmounted } from "vue";
import * as THREE from "three";
import bannerImage1 from "../src/assets/img/banner1.png";
import bannerImage2 from "../src/assets/img/banner2.png";
import bannerImage3 from "../src/assets/img/banner3.png";const bannerBox = ref(null);/*** 工具函数：全屏高清ShaderMaterial，支持透明度渐变：* * 创建一个全屏的ShaderMaterial，用于显示纹理。* * 该材质支持透明度渐变，可以通过 uniforms 控制纹理和透明度。* * 使用 THREE.js 的 PlaneGeometry 实现全屏效果。* * 使用顶点着色器和片段着色器实现纹理的显示和透明度控制。
ShaderMaterial 默认会用纹理的原始分辨率和采样方式，且不会自动做 mipmap 或滤波降级，显示效果非常锐利、高清。
相较于MeshBasicMaterial，ShaderMaterial 提供了更高的灵活性和控制力，
MeshBasicMaterial会出现模糊或锯齿现象，尤其是在全屏显示时。* * 该ShaderMaterial材质可以用于全屏显示图片，适用于轮播图、背景等场景。* */
function createFullScreenShaderMaterial(texture, opacity = 1.0) {return new THREE.ShaderMaterial({uniforms: {uTexture: { value: texture },uOpacity: { value: opacity },},vertexShader: `varying vec2 vUv;void main() {vUv = uv;gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1.0);}`,fragmentShader: `uniform sampler2D uTexture;uniform float uOpacity;varying vec2 vUv;void main() {vec4 color = texture2D(uTexture, vUv);color.a *= uOpacity;gl_FragColor = color;}`,transparent: true,});
}
// 定义轮播相关变量
let slideshowTimeout = null;
let animationFrameId = null;
onMounted(() => {/*** 整体逻辑：* 1. 初始化场景、相机、渲染器。* 2. 加载三张图片纹理，并设置纹理参数。* 3. 定义六种动画效果：百叶窗、手风琴、拼图、渐变、菱形波次、圆形扩展。* 4. 使用 setTimeout 控制每个效果的切换时间。* 5. 使用 effectIndex 来控制当前使用的特效。* 6. 使用 currentIndex 来控制当前显示的图片索引。* 7. 使用 isFirstLoad 来判断是否是第一次加载，如果是，则直接显示第一张图片。* 8. 每次切换效果时，先加载下一张图片的纹理，然后根据当前效果索引调用对应的动画函数。* 9. 每个效果动画完成后，更新 currentFullMesh，并在最后一个效果后延时8000毫秒再开始下一轮。* 10. 使用 requestAnimationFrame 实现渲染循环。* 11. 使用 THREE.js 的 PlaneGeometry 和 ShaderMaterial 实现全屏高清效果。* 12. 使用 THREE.js 的 TextureLoader 加载图片纹理，并设置纹理的编码、包裹方式和过滤方式。* 13. 使用 THREE.js 的 PerspectiveCamera 实现透视相机。* 14. 使用 THREE.js 的 WebGLRenderer 实现渲染器，并设置输出编码和色调映射。* */// 初始化场景、相机、渲染器const scene = new THREE.Scene();// 获取 bannerBox 的宽高const bannerWidth = bannerBox.value.clientWidth;const bannerHeight = bannerBox.value.clientHeight;// 初始化相机// 使用透视相机，视野角度为75度，宽高比为 bannerWidth / bannerHeight，近裁剪面为0.1，远裁剪面为1000const camera = new THREE.PerspectiveCamera(75,bannerWidth / bannerHeight,0.1,1000);// 设置相机位置，使其能够完整看到整个 banner// 相机位置设置为 bannerHeight / (2 * Math.tan((camera.fov * Math.PI) / 360))camera.position.z =bannerHeight / (2 * Math.tan((camera.fov * Math.PI) / 360));// 设置渲染器const renderer = new THREE.WebGLRenderer();renderer.setSize(bannerWidth, bannerHeight);renderer.outputEncoding = THREE.sRGBEncoding;renderer.toneMapping = THREE.ACESFilmicToneMapping;renderer.toneMappingExposure = 0.9;bannerBox.value.appendChild(renderer.domElement);// 加载图片纹理const textureLoader = new THREE.TextureLoader();const textures = [textureLoader.load(bannerImage1),textureLoader.load(bannerImage2),textureLoader.load(bannerImage3),];textures.forEach((texture) => {texture.encoding = THREE.sRGBEncoding;texture.wrapS = THREE.ClampToEdgeWrapping;texture.wrapT = THREE.ClampToEdgeWrapping;texture.minFilter = THREE.LinearFilter;});let currentFullMesh = null;/*** 百叶窗动画:* 效果：将整个纹理分割成 5 个水平的百叶窗片段，* 每个片段从上到下依次展开，形成百叶窗效果。* */function animateBlinds(nextTexture, onComplete) {const blinds = [];const blindsCount = 5;const blindHeight = bannerHeight / blindsCount;for (let i = 0; i < blindsCount; i++) {const geometry = new THREE.PlaneGeometry(bannerWidth, blindHeight);const material = createFullScreenShaderMaterial(textures[currentIndex],0);material.transparent = true;// 设置材质的 uniformsconst uvOffsetY = 1 - (i + 1) / blindsCount;const uvOffsetHeight = 1 / blindsCount;const uvArray = geometry.attributes.uv.array;uvArray[1] = uvOffsetY + uvOffsetHeight;uvArray[3] = uvOffsetY + uvOffsetHeight;uvArray[5] = uvOffsetY;uvArray[7] = uvOffsetY;geometry.attributes.uv.needsUpdate = true;// 创建材质const mesh = new THREE.Mesh(geometry, material);mesh.position.y = bannerHeight / 2 - blindHeight / 2 - i * blindHeight;scene.add(mesh);blinds.push(mesh);}// 设置每个百叶窗片段的纹理和透明度blinds.forEach((blind, index) => {setTimeout(() => {blind.material.uniforms.uTexture.value = nextTexture;blind.material.needsUpdate = true;let progress = 0;const duration = 500;function fadeIn() {progress += 16;const t = Math.min(progress / duration, 1);blind.material.uniforms.uOpacity.value = t;if (t < 1) {requestAnimationFrame(fadeIn);}}fadeIn();}, index * 300);});// 所有百叶窗片段动画完成后，移除它们并显示下一张图片setTimeout(() => {blinds.forEach((mesh) => scene.remove(mesh));if (currentFullMesh) scene.remove(currentFullMesh);const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material = createFullScreenShaderMaterial(nextTexture, 1);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;}, blindsCount * 300 + 1000);}/*** 拼图碎片动画:* 效果：将整个纹理分割成 5x5 的拼图碎片，动画整体实现从左上角到右下角的拼图效果，* */function createPuzzleEffect(nextTexture) {const rows = 5;const cols = 5;const pieceWidth = bannerWidth / cols;const pieceHeight = bannerHeight / rows;const pieces = [];const tempGroup = new THREE.Group();scene.add(tempGroup);for (let col = 0; col < cols; col++) {for (let row = 0; row < rows; row++) {// 创建每个拼图碎片的几何体和材质// 使用 PlaneGeometry 创建平面几何体const geometry = new THREE.PlaneGeometry(pieceWidth, pieceHeight);const material = createFullScreenShaderMaterial(nextTexture, 0);// 设置材质的 uniformsconst uvOffsetX = col / cols;const uvOffsetY = 1 - (row + 1) / rows;const uvOffsetWidth = 1 / cols;const uvOffsetHeight = 1 / rows;const uvArray = geometry.attributes.uv.array;uvArray[0] = uvOffsetX;uvArray[1] = uvOffsetY + uvOffsetHeight;uvArray[2] = uvOffsetX + uvOffsetWidth;uvArray[3] = uvOffsetY + uvOffsetHeight;uvArray[4] = uvOffsetX;uvArray[5] = uvOffsetY;uvArray[6] = uvOffsetX + uvOffsetWidth;uvArray[7] = uvOffsetY;geometry.attributes.uv.needsUpdate = true;// 创建每个拼图碎片的网格const mesh = new THREE.Mesh(geometry, material);mesh.position.x = col * pieceWidth - bannerWidth / 2 + pieceWidth / 2;mesh.position.y =bannerHeight / 2 - row * pieceHeight - pieceHeight / 2;tempGroup.add(mesh);pieces.push({ mesh, col, row });}}// 计算最大对角线长度const maxDiagonal = rows + cols - 1;for (let d = 0; d < maxDiagonal; d++) {setTimeout(() => {pieces.forEach(({ mesh, col, row }) => {if (col + row === d) {let progress = 0;const duration = 500;function fadeIn() {progress += 16;const t = Math.min(progress / duration, 1);mesh.material.uniforms.uOpacity.value = t;if (t < 1) {requestAnimationFrame(fadeIn);}}fadeIn();}});}, d * 300);}// 所有拼图碎片动画完成后，移除它们并显示下一张图片setTimeout(() => {scene.remove(tempGroup);if (currentFullMesh) scene.remove(currentFullMesh);const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material = createFullScreenShaderMaterial(nextTexture, 1);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;}, maxDiagonal * 300 + 1000);}/*** 手风琴动画:* 效果：动画整体实现从右到左的手风琴效果，，每一个手风琴片段从下到上展开。* */function createAccordionEffect(nextTexture) {const accordionCount = 5;const accordionWidth = bannerWidth / accordionCount;const accordionHeight = bannerHeight;const accordions = [];for (let i = 0; i < accordionCount; i++) {const geometry = new THREE.PlaneGeometry(accordionWidth, accordionHeight);const uStart = i / accordionCount;const uEnd = (i + 1) / accordionCount;const uvArray = geometry.attributes.uv.array;uvArray[0] = uStart;uvArray[1] = 1;uvArray[2] = uEnd;uvArray[3] = 1;uvArray[4] = uStart;uvArray[5] = 0;uvArray[6] = uEnd;uvArray[7] = 0;geometry.attributes.uv.needsUpdate = true;// 创建每个手风琴片段的材质const material = createFullScreenShaderMaterial(nextTexture, 1);const mesh = new THREE.Mesh(geometry, material);// 设置每个手风琴片段的位置mesh.position.x =i * accordionWidth - bannerWidth / 2 + accordionWidth / 2;mesh.position.y = 0;mesh.scale.y = 0;scene.add(mesh);accordions.push(mesh);}// 动画效果：每个手风琴片段从下到上展开accordions.forEach((accordion, index) => {setTimeout(() => {let progress = 0;const duration = 1200;// 使用 requestAnimationFrame 实现动画function animatePiece() {progress += 16;const t = Math.min(progress / duration, 1);accordion.scale.y = t;accordion.position.y = (t - 1) * (bannerHeight / 2);if (t < 1) {requestAnimationFrame(animatePiece);}}animatePiece();}, (accordionCount - 1 - index) * 300);});// 所有手风琴片段动画完成后，移除它们并显示下一张图片setTimeout(() => {accordions.forEach((mesh) => scene.remove(mesh));if (currentFullMesh) scene.remove(currentFullMesh);const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material = createFullScreenShaderMaterial(nextTexture, 1);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;}, accordionCount * 300 + 1000);}/*** 渐变动画：* 效果：将整个纹理渐变显示，同时实现缩放动画，* */
function createGradientEffect(nextTexture) {const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material = createFullScreenShaderMaterial(nextTexture, 0);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;let progress = 0;const duration = 2000;const startScale = 1.2; // 初始放大倍数const endScale = 1.0;   // 结束时为正常大小function animateGradient() {progress += 16;const t = Math.min(progress / duration, 1);mesh.material.uniforms.uOpacity.value = t;// 图片缩放动画：从 startScale 到 endScaleconst scale = startScale + (endScale - startScale) * t;mesh.scale.set(scale, scale, 1);if (t < 1) {requestAnimationFrame(animateGradient);} else {// 动画结束，重置为正常大小mesh.scale.set(1, 1, 1);if (currentFullMesh) scene.remove(currentFullMesh);const newGeometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const newMaterial = createFullScreenShaderMaterial(nextTexture, 1);const newMesh = new THREE.Mesh(newGeometry, newMaterial);scene.add(newMesh);currentFullMesh = newMesh;}}animateGradient();
}/*** 菱形波次效果：* 效果：动画整体实现从中心向外扩散的菱形波次效果，* 每个菱形片段从中心向外扩散，形成菱形波次效果。* */function createDiamondGradientEffect(nextTexture) {const rows = 7;const cols = 5;const pieceWidth = bannerWidth / cols;const pieceHeight = bannerHeight / rows;const pieces = [];const tempGroup = new THREE.Group();scene.add(tempGroup);const centerRow = Math.floor(rows / 2);const centerCol = Math.floor(cols / 2);for (let col = 0; col < cols; col++) {for (let row = 0; row < rows; row++) {const geometry = new THREE.PlaneGeometry(pieceWidth, pieceHeight);const material = createFullScreenShaderMaterial(nextTexture, 0);// 设置材质的 uniformsconst uvOffsetX = col / cols;const uvOffsetY = 1 - (row + 1) / rows;const uvOffsetWidth = 1 / cols;const uvOffsetHeight = 1 / rows;const uvArray = geometry.attributes.uv.array;uvArray[0] = uvOffsetX;uvArray[1] = uvOffsetY + uvOffsetHeight;uvArray[2] = uvOffsetX + uvOffsetWidth;uvArray[3] = uvOffsetY + uvOffsetHeight;uvArray[4] = uvOffsetX;uvArray[5] = uvOffsetY;uvArray[6] = uvOffsetX + uvOffsetWidth;uvArray[7] = uvOffsetY;geometry.attributes.uv.needsUpdate = true;const mesh = new THREE.Mesh(geometry, material);mesh.position.x = col * pieceWidth - bannerWidth / 2 + pieceWidth / 2;mesh.position.y =bannerHeight / 2 - row * pieceHeight - pieceHeight / 2;tempGroup.add(mesh);const distance = Math.abs(row - centerRow) + Math.abs(col - centerCol);pieces.push({ mesh, distance });}}// 计算最大距离const maxDistance = Math.max(...pieces.map((p) => p.distance));// 使用 setTimeout 控制每个菱形片段的动画for (let d = 0; d <= maxDistance; d++) {setTimeout(() => {pieces.forEach(({ mesh, distance }) => {if (distance === d) {let progress = 0;const duration = 400;function fadeIn() {progress += 16;const t = Math.min(progress / duration, 1);mesh.material.uniforms.uOpacity.value = t;if (t < 1) {requestAnimationFrame(fadeIn);}}fadeIn();}});}, d * 200);}// 所有菱形片段动画完成后，移除它们并显示下一张图片setTimeout(() => {scene.remove(tempGroup);if (currentFullMesh) scene.remove(currentFullMesh);const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material = createFullScreenShaderMaterial(nextTexture, 1);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;}, (maxDistance + 1) * 200 + 800);}/*** 圆形扩展动画：* 效果：圆形从左上角开始扩展，直到覆盖整个纹理，* */function revealPixels(nextTexture) {const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);// 创建 uniformsconst uniforms = {uTexture: { value: nextTexture },uResolution: { value: new THREE.Vector2(bannerWidth, bannerHeight) },uRadius: { value: 0.0 },};// 创建 ShaderMaterialconst material = new THREE.ShaderMaterial({uniforms,transparent: true,vertexShader: `varying vec2 vUv;void main() {vUv = uv;gl_Position = projectionMatrix * modelViewMatrix * vec4(position,1.0);}`,fragmentShader: `uniform sampler2D uTexture;uniform vec2 uResolution;uniform float uRadius;varying vec2 vUv;void main() {vec2 uv = vUv;vec2 pixelPos = uv * uResolution;float dist = length(pixelPos - vec2(0.0, uResolution.y));float alpha = smoothstep(uRadius - 10.0, uRadius, dist);vec4 color = texture2D(uTexture, uv);color.a *= 1.0 - alpha;gl_FragColor = color;}`,});// 创建网格并添加到场景const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);// 设置当前全屏网格let progress = 0;const duration = 2000;const maxRadius = Math.sqrt(bannerWidth * bannerWidth + bannerHeight * bannerHeight);// 动画函数：使用 requestAnimationFrame 实现圆形扩展动画function animateReveal() {progress += 16;const t = Math.min(progress / duration, 1);uniforms.uRadius.value = t * maxRadius;if (t < 1) {requestAnimationFrame(animateReveal);} else {if (currentFullMesh) scene.remove(currentFullMesh);scene.remove(mesh);const geometry2 = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const material2 = createFullScreenShaderMaterial(nextTexture, 1);const mesh2 = new THREE.Mesh(geometry2, material2);scene.add(mesh2);currentFullMesh = mesh2;}}animateReveal();}/*** 轮播逻辑：动画效果有：百叶窗、手风琴、拼图、渐变、菱形波次、圆形扩展动画。* 每次切换效果时，先加载下一张图片的纹理，* 如果是第一次加载，则直接显示第一张图片。* 然后根据当前效果索引调用对应的动画函数。* 每个效果动画完成后，更新 currentFullMesh，* 并在最后一个效果后延时8000毫秒再开始下一轮。* 使用 setTimeout 控制每个效果的切换时间。* 使用 effectIndex 来控制当前使用的特效。* 使用 currentIndex 来控制当前显示的图片索引。* 使用 isFirstLoad 来判断是否是第一次加载，* */let currentIndex = 0;let effectIndex = 0;let isFirstLoad = true;// 开始轮播function startSlideshow() {const nextIndex = (currentIndex + 1) % textures.length;if (isFirstLoad) {const material = createFullScreenShaderMaterial(textures[currentIndex],1);const geometry = new THREE.PlaneGeometry(bannerWidth, bannerHeight);const mesh = new THREE.Mesh(geometry, material);scene.add(mesh);currentFullMesh = mesh;isFirstLoad = false;setTimeout(startSlideshow, 2000);return;}if (effectIndex === 0) {animateBlinds(textures[nextIndex]);} else if (effectIndex === 1) {createAccordionEffect(textures[nextIndex]);} else if (effectIndex === 2) {createPuzzleEffect(textures[nextIndex]);} else if (effectIndex === 3) {createGradientEffect(textures[nextIndex]);} else if (effectIndex === 4) {createDiamondGradientEffect(textures[nextIndex]);} else if (effectIndex === 5) {revealPixels(textures[nextIndex]);}effectIndex = (effectIndex + 1) % 6;// 更新 currentIndexcurrentIndex = nextIndex;slideshowTimeout = setTimeout(startSlideshow, 5000);}function animate() {animationFrameId = requestAnimationFrame(animate);renderer.render(scene, camera);}startSlideshow();animate();// 窗口大小调整时更新渲染器和相机window.addEventListener("resize", () => {const newWidth = bannerBox.value.clientWidth;const newHeight = bannerBox.value.clientHeight;camera.aspect = newWidth / newHeight;camera.updateProjectionMatrix();renderer.setSize(newWidth, newHeight);// 更新平面几何体的宽高if (currentFullMesh) {currentFullMesh.geometry.dispose(); // 销毁旧几何体const newGeometry = new THREE.PlaneGeometry(newWidth, newHeight);currentFullMesh.geometry = newGeometry; // 替换为新几何体}});// 浏览器切换到其他网页时，关闭定时器window.addEventListener("blur", () => {console.log("浏览器失去焦点，清理定时器");stopSlideshow();});// 浏览器切换回当前网页时，重新开始轮播window.addEventListener("focus", () => {console.log("浏览器获得焦点，重新开始轮播");if (!slideshowTimeout) {startSlideshow();}});
});
// 轮播定时器控制函数
// stopSlideshow 函数可在任何需要时调用，确保定时器被清理。
function stopSlideshow() {if (slideshowTimeout) {clearTimeout(slideshowTimeout);slideshowTimeout = null;}
}// onUnmounted：切换路由或组件卸载时调用，确保轮播定时器被清理。
// 这样可以保证组件卸载时动画和定时器被正确清理，回来时动画不会乱。
onUnmounted(() => {console.log("组件卸载，清理定时器和动画帧");stopSlideshow(); // 停止轮播定时器if (animationFrameId) {cancelAnimationFrame(animationFrameId);animationFrameId = null;}
});
</script><style scoped>
.banner_box {width: 1100px;margin: 0 auto;height: 750px;position: relative;overflow: hidden;
}
</style>

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