部分场景
image.png
image.png
体验地址
操作说明 视频
https://www.bilibili.com/video/BV1kY4y1v78z/
我做了哪些（功能）
- draco解析glb模型 同时处理部分纹理请求 减轻一次加载纹理压力
- 手动控制轨道控制器镜头动画
- 多音频拼接 控制
- 封装动画播放器 控制进度切换
- 动画进度控制器 同步音频 模拟视频体验
- useContext状态共享
- 自定义多级右键菜单 模拟原生菜单体验
- 空闲时间加载后续用到的模型
- 模型纹理&位置动态切换
- echart图表使用
- 浏览器自适应单位vw vmax使用(大面积使用)
- 兼容移动端手机浏览
- 模型的销毁和动画加载
- useRef暴露方法多方调用(大量使用)
- css-in-js 方案实践 css引擎styled-component
- 未完成请求避免产生影响
- 未执行计数器清理 字幕播放中 镜头切换动画执行中切换 后续的功能等
- 点击不同模型产生不同效果 点击的事件监听 鼠标hover的样式
- ...
局限
- 性能拉垮 考虑到诸多原因 未采用按需渲染在低配机上帧率大概只有30帧左右
- 模型做的不精细-第一次建模
- 在手机或者高刷设备上动画模型播放渲染速度与60帧设备不一致
源代码地址
https://gitee.com/honbingitee/kmyc
部分逻辑
按需渲染
controls.addEventListener('change', () => {
renderer.render(scene, camera);
});
模型加载
https://hongbin.blog.csdn.net/article/details/122594047
动画控制器
https://hongbin.blog.csdn.net/article/details/123662686
模型纹理条件切换
/**
* @description: 加载相册模型 返回相关操作回调
* @param {number} animationIndex 战役索引
* @param {THREE.TextureLoader} textureLoader 纹理加载器
* @return {XCBack} XCBack
*/
export async function loadXCModel(
animationIndex: number,
textureLoader: THREE.TextureLoader
): Promise<XCBack> {
const gltf = await window.gltfLoader.loadAsync(xcModel);
const [model] = gltf.scene.children;
const multiple = 5;
model.position.y = 1.8 * multiple;
if (animationIndex === 1) {
model.rotateY(-Math.PI / 2);
model.rotateX(-Math.PI / 10);
model.rotateZ(Math.PI / 10);
}
const setZero = (mash: typeof model) => {
mash.scale.x = 0;
mash.scale.y = 0;
mash.scale.z = 0;
};
setZero(model);
/**
* 设置不同的纹理 -- 切换图片
*/
const setMaterial = (mash: Object3D, url: string) => {
const texture = textureLoader.load(url);
texture.flipY = false;
texture.encoding = 3001;
//@ts-ignore
const mater = mash.material.clone(); //不能共用一个material 以为 instance.material 指向的都是同一个对象
mater.map = texture;
//@ts-ignore
mash.material = mater;
};
const pictures: XCBack["models"] = [];
for (let i = 0; i < 4; i++) {
const instance = model.clone();
//hover tip
instance.userData.type = ModelType["Picture"];
instance.userData.desc = XCDesc[animationIndex]
? XCDesc[animationIndex][i]
: "";
setMaterial(
instance,
`${process.env.REACT_APP_URL}xc/${animationIndex}-${i}-y.jpg`
);
if (animationIndex === 1) {
instance.position.x = (i - 1) * -5 * multiple;
instance.position.z = -14 * multiple;
} else if (animationIndex === 2) {
instance.position.x = -10 * multiple;
instance.position.z = (i - 2) * 5 * multiple;
} else {
instance.position.x = -10 * multiple;
instance.position.z = (i - 1) * 5 * multiple;
}
pictures.push(instance);
}
let timer1: number;
let count = 0;
const range = 30;
const show = () => {
if (count < range) {
pictures.forEach(item => {
item.scale.y += multiple / range;
item.scale.z += (multiple / range) * 1.8;
item.scale.x += multiple / range / 10;
});
count++;
timer1 = requestAnimationFrame(show);
}
};
const hide = () => {
pictures.forEach(setZero);
count = 0;
cancelAnimationFrame(timer1);
requestAnimationFrame(() => {
cancelAnimationFrame(timer1);
});
};
let prevIndex = animationIndex;
const toggle: XCBack["toggle"] = nextIndex => {
pictures.forEach((item, index) => {
/**
* hover 显示图片介绍
*/
item.userData.type = ModelType["Picture"];
item.userData.desc = XCDesc[nextIndex][index];
setMaterial(
item,
`${process.env.REACT_APP_URL}xc/${nextIndex}-${index}-y.jpg`
);
//旋转角度
if (nextIndex === 1) {
if (prevIndex !== 1) {
item.rotateY(-Math.PI / 2);
item.rotateX(-Math.PI / 10);
item.rotateZ(Math.PI / 10);
}
} else {
if (prevIndex === 1) {
item.rotateY(Math.PI / 2);
item.rotateX(Math.PI / 10);
item.rotateZ(Math.PI / 10);
}
}
//位置
if (nextIndex === 1) {
item.position.x = (index - 1) * -5 * multiple;
item.position.z = -14 * multiple;
} else if (nextIndex === 2) {
item.position.x = -10 * multiple;
item.position.z = (index - 2) * 5 * multiple;
} else {
item.position.x = -10 * multiple;
item.position.z = (index - 1) * 5 * multiple;
}
});
prevIndex = nextIndex;
};
return {
show,
hide,
models: pictures,
toggle,
};
}
模型加载同时请求部分纹理 生成进度条
//加载10个纹理
const loadTexture = () => {
const textureLoader = new TextureLoader();
for (let i = 0; i < 10; i++) {
const index = i.toString().padStart(2, "0");
const url = `${process.env.REACT_APP_URL}q/${i}.jpg`;
const texture = textureLoader.load(
url,
_ => {
setProgress(timeCheck(5));
},
undefined,
err => {
console.error("load texture fail:", err);
setProgress(timeCheck(5));
}
);
texture.flipY = false;
texture.encoding = sRGBEncoding;
addTexture(index, texture);
}
};
//draco解析模型
const dracoLoader = () => {
let prevModel = 0;
const manager = new LoadingManager();
manager.onProgress = (_, loaded, total) => {
const progress = Math.floor((loaded / total) * 100);
if (progress === 100) return setProgress(timeCheck(50 - prevModel));
prevModel += progress / 4;
setProgress(timeCheck(progress / 4));
};
//设置错误信息
manager.onError = setIsLoadFail;
//创建draco解析器
const dracoLoader = new DRACOLoader(manager);
dracoLoader.setDecoderConfig({ type: "js" });
dracoLoader.setDecoderPath(process.env.REACT_APP_URL as string);
// gltf 加载器
const gltfLoader = new GLTFLoader(manager);
gltfLoader.setDRACOLoader(dracoLoader);
gltfLoader.load(mapModel, setMap);
//不带LoadingManager的加载器 如果使用gltfLoader会触发事件改变progress状态造成内存泄漏
const normalGltfLoader = new GLTFLoader();
normalGltfLoader.setDRACOLoader(dracoLoader);
window.gltfLoader = normalGltfLoader;
};
/**
* 进度增长检测
* @param {number} increase 增长的数值
* @param {number} prev state原本数值
* @return {number} newValue
*/
const timeCheck = (increase: number) => (prev: number) => {
if (increase + prev < 100) return prev + increase;
// >= 100 检测时间
if (Date.now() - enterTime > maxLoadTime) return 100;
//time < maxLoadTime
timer = setTimeout(() => {
setProgress(100);
}, maxLoadTime - (Date.now() - enterTime));
//显示跳过按钮
setIsCanJump(true);
return prev;
};
模型缩放小动画
let timer: number;
let i = 0;
const r = () => {
if (i < 15) {
timer = requestAnimationFrame(r);
}
for (const item of iconScene.children) {
item.scale.x += 0.03;
item.scale.y += 0.03;
item.scale.z += 0.03;
}
i++;
};
r();
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