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概述

本文将介绍如何在vue3项目中使用Live2D。

Live2D 介绍

Live2D 是什么

Live2D 是一种用于将二维图像转化为可动画三维模型的技术，主要应用于游戏、虚拟角色和互动应用中。它允许开发者通过对静态图像进行分层和建模，使角色在不同角度下能够进行流畅的动作和表情变化。

Live2D 主要特点

• 动态表现：Live2D 可以让角色在不改变原始图像的情况下，实现多种动作和表情，例如眨眼、微笑、转头等。

• 用户交互：它可以与用户的输入进行互动，比如鼠标移动或触摸屏幕时，角色会作出相应的反馈。

• 应用广泛：被广泛应用于手机游戏、动画、虚拟直播、社交软件等领域。

• 易于使用：通过 Live2D 提供的工具（如 Live2D Cubism），艺术家可以方便地创建和编辑模型，无需深入的编程知识。

Live2D 效果

vue3 中使用 Live2D

如果前端项目是用vite搭建，则需要在index.html中引入live2d.min.js库，因为在 vue 组件中引入会报错。

封装 Live 组件

template

template部分如下:

<template><div:class="{'vue-live2d': true,'vue-live2d-on-left': true,// 'vue-live2d-on-right': direction === 'right',}":style="{width: `300px`,height: `300px`,position: 'absolute',left: '10px',bottom: '20px',}"@mouseover="openLive2dTool"@mouseout="closeLive2dTool"><divv-show="true"v-html="data.tipText":class="{'vue-live2d-tip': true,'vue-live2d-tip-on-top': true,// 'vue-live2d-tip-on-bottom': tipPosition === 'bottom',}"></div><canvas:id="customId"v-show="mainShow":class="{'vue-live2d-main': true,'vue-live2d-main-on-left': true,// 'vue-live2d-main-on-right': direction === 'right',}"width="300"height="300"></canvas><div v-show="toolShow" class="vue-live2d-tool"><spanv-for="(tool, index) in tools":key="index":class="tool.className"v-html="tool.svg"@click="tool.click"/></div><divv-show="toggleShow"@click="openLive2dMain":class="{'vue-live2d-toggle': true,'vue-live2d-toggle-on-left': true,// 'vue-live2d-toggle-on-right': direction === 'right',}"><span>Kanban girl</span></div></div>
</template>

template部分主要是定义 UI 部分，以及绑定界面点击和hove的事件，Live2d的模型是在 canvas 中绘制的。

核心逻辑
核心逻辑主要就是加载Live2D的模型以及定义事件，其实现如下：

<script setup>
import { onMounted, nextTick, ref, computed } from "vue";import tips from "./options/tips";// const model = ["Potion-Maker/Pio", "school-2017-costume-yellow"];
const model = ["ShizukuTalk/shizuku-48", "default"];const apiPath = "https://evgo2017.com/api/live2d-static-api/indexes";let [modelPath, modelTexturesId] = model;const customId = "vue-live2d-main";let messageTimer = null;const data = ref({containerDisplay: {tip: false,main: true,tool: false,toggle: false,},tipText: "vue-live2d Kanban girl",modelTexturesId: modelTexturesId,
});const changeLive2dSize = () => {document.querySelector(`#${customId}`).outerHTML = `<canvas id=${customId} width="300" height="300" class="vue-live2d-main"></canvas>`;loadModel();
};const loadModel = () => {window.loadlive2d(customId,`${apiPath}/${modelPath}/${data.value.modelTexturesId}.json`);console.log(`Live2D 模型 ${modelPath}，服装 ${data.value.modelTexturesId} 加载完成`);
};const loadRandModel = () => {http({url: `${apiPath}/models.json`,success: (data) => {const models = data.filter(({ modelPath: i }) => i !== modelPath);const { modelPath: j, modelIntroduce } =models[Math.floor(Math.random() * models.length)];modelPath = j;showMessage(`${modelIntroduce}`, 4000);loadRandTextures(true);},});
};const loadRandTextures = (isAfterRandModel = false) => {http({url: `${apiPath}/${modelPath}/textures.json`,success: (resp) => {const modelTexturesIds = resp.filter((modelTexturesId) => modelTexturesId !== data.value.modelTexturesId);data.value.modelTexturesId =modelTexturesIds[Math.floor(Math.random() * modelTexturesIds.length)];loadModel();if (!isAfterRandModel) {showMessage("我的新衣服好看嘛？", 4000);}},});
};const showMessage = (msg = "", timeout = 6000) => {if (messageTimer) {clearTimeout(messageTimer);messageTimer = null;} else {data.value.containerDisplay.tip = true;}data.value.tipText = msg;messageTimer = setTimeout(() => {data.value.containerDisplay.tip = false;messageTimer = null;}, timeout);
};const takePhoto = () => {showMessage("照好了嘛，留个纪念吖~");window.Live2D.captureName = "photo.png";window.Live2D.captureFrame = true;
};const showHitokoto = () => {http({url: "https://v1.hitokoto.cn",success: ({ hitokoto, id, creator, from }) => {showMessage(`${hitokoto} <br> - by <a href="https://hitokoto.cn?id=${id}">${creator}</a> from 《${from} 》`);},});
};const closeLive2dMain = () => {data.value.containerDisplay.main = false;
};const openLive2dMain = () => {data.value.containerDisplay.main = true;
};
const closeLive2dTool = () => {data.value.containerDisplay.tool = false;
};
const openLive2dTool = () => {data.value.containerDisplay.tool = true;
};
const loadEvent = () => {for (const event in tips) {for (const { selector, texts } of tips[event]) {const dom =selector === "document" ? document : document.querySelector(selector);if (dom == null) {continue;}dom.addEventListener(event, () => {const msg = texts[Math.floor(Math.random() * texts.length)];showMessage(msg, 2000);});}}
};
const http = ({ url, success }) => {const xhr = new XMLHttpRequest();xhr.onreadystatechange = function () {if (xhr.readyState === 4) {if (xhr.status >= 200 || xhr.status < 300 || xhr.status === 304) {success && xhr.response && success(JSON.parse(xhr.response));} else {console.error(xhr);}}};xhr.open("GET", url);xhr.send(null);
};nextTick(() => {loadEvent();
});
onMounted(() => {loadModel();
});defineProps({tips: {default: () => tips,type: Object,},width: {default: 0,type: Number,},height: {default: 0,type: Number,},size: {default: 255,type: Number,},
});const tipShow = computed(() => {return mainShow && data.value.containerDisplay.tip;
});const mainShow = computed(() => {return data.value.containerDisplay.main;
});const toolShow = computed(() => {return mainShow && data.value.containerDisplay.tool;
});const toggleShow = computed(() => {return !mainShow;
});const tools = ref([{className: "custom-fa-comment",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M256 32C114.6 32 0 125.1 0 240c0 49.6 21.4 95 57 130.7C44.5 421.1 2.7 466 2.2 466.5c-2.2 2.3-2.8 5.7-1.5 8.7S4.8 480 8 480c66.3 0 116-31.8 140.6-51.4 32.7 12.3 69 19.4 107.4 19.4 141.4 0 256-93.1 256-208S397.4 32 256 32z"/></svg>',click: showHitokoto,},{className: "custom-fa-user-circle",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M248 8C111 8 0 119 0 256s111 248 248 248 248-111 248-248S385 8 248 8zm0 96c48.6 0 88 39.4 88 88s-39.4 88-88 88-88-39.4-88-88 39.4-88 88-88zm0 344c-58.7 0-111.3-26.6-146.5-68.2 18.8-35.4 55.6-59.8 98.5-59.8 2.4 0 4.8.4 7.1 1.1 13 4.2 26.6 6.9 40.9 6.9 14.3 0 28-2.7 40.9-6.9 2.3-.7 4.7-1.1 7.1-1.1 42.9 0 79.7 24.4 98.5 59.8C359.3 421.4 306.7 448 248 448z"/></svg>',click: loadRandModel,},{className: "custom-fa-street-view",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M367.9 329.76c-4.62 5.3-9.78 10.1-15.9 13.65v22.94c66.52 9.34 112 28.05 112 49.65 0 30.93-93.12 56-208 56S48 446.93 48 416c0-21.6 45.48-40.3 112-49.65v-22.94c-6.12-3.55-11.28-8.35-15.9-13.65C58.87 345.34 0 378.05 0 416c0 53.02 114.62 96 256 96s256-42.98 256-96c0-37.95-58.87-70.66-144.1-86.24zM256 128c35.35 0 64-28.65 64-64S291.35 0 256 0s-64 28.65-64 64 28.65 64 64 64zm-64 192v96c0 17.67 14.33 32 32 32h64c17.67 0 32-14.33 32-32v-96c17.67 0 32-14.33 32-32v-96c0-26.51-21.49-48-48-48h-11.8c-11.07 5.03-23.26 8-36.2 8s-25.13-2.97-36.2-8H208c-26.51 0-48 21.49-48 48v96c0 17.67 14.33 32 32 32z"/></svg>',click: loadRandTextures,},{className: "custom-fa-camera-retro",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M48 32C21.5 32 0 53.5 0 80v352c0 26.5 21.5 48 48 48h416c26.5 0 48-21.5 48-48V80c0-26.5-21.5-48-48-48H48zm0 32h106c3.3 0 6 2.7 6 6v20c0 3.3-2.7 6-6 6H38c-3.3 0-6-2.7-6-6V80c0-8.8 7.2-16 16-16zm426 96H38c-3.3 0-6-2.7-6-6v-36c0-3.3 2.7-6 6-6h138l30.2-45.3c1.1-1.7 3-2.7 5-2.7H464c8.8 0 16 7.2 16 16v74c0 3.3-2.7 6-6 6zM256 424c-66.2 0-120-53.8-120-120s53.8-120 120-120 120 53.8 120 120-53.8 120-120 120zm0-208c-48.5 0-88 39.5-88 88s39.5 88 88 88 88-39.5 88-88-39.5-88-88-88zm-48 104c-8.8 0-16-7.2-16-16 0-35.3 28.7-64 64-64 8.8 0 16 7.2 16 16s-7.2 16-16 16c-17.6 0-32 14.4-32 32 0 8.8-7.2 16-16 16z"/></svg>',click: takePhoto,},{className: "custom-fa-info-circle",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z"/></svg>',click: () => {},},{className: "custom-fa-times",svg: '<svg xmlns="http://www.w3.org/2000/svg" viewBox="-40 -40 432 592" fill="currentColor" height="20px" width="20px"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M242.72 256l100.07-100.07c12.28-12.28 12.28-32.19 0-44.48l-22.24-22.24c-12.28-12.28-32.19-12.28-44.48 0L176 189.28 75.93 89.21c-12.28-12.28-32.19-12.28-44.48 0L9.21 111.45c-12.28 12.28-12.28 32.19 0 44.48L109.28 256 9.21 356.07c-12.28 12.28-12.28 32.19 0 44.48l22.24 22.24c12.28 12.28 32.2 12.28 44.48 0L176 322.72l100.07 100.07c12.28 12.28 32.2 12.28 44.48 0l22.24-22.24c12.28-12.28 12.28-32.19 0-44.48L242.72 256z"/></svg>',click: closeLive2dMain,},
]);
</script>

Demo地址

Demo地址和具体示例可参考：https://github.com/Jinuss/maps