How to use Vue and Canvas to create a visual display application for 3D models

How to use Vue and Canvas to create a visual display application for 3D models

In recent years, the application of data visualization has become more and more widespread, and the visual display of 3D models has attracted the attention of the majority of developers. As a flexible front-end framework, Vue combined with Canvas technology can realize the visual display of 3D models very well. This article will introduce how to use Vue and Canvas to create a simple 3D model visual display application, with code examples.

First, we need to prepare some basic knowledge. Vue is a progressive framework for building user interfaces, which is ideal for creating single-page applications. Canvas is an API provided by HTML5 for drawing graphics, through which 2D and 3D graphics can be drawn.

Next, we need to create a Vue project. First, make sure Node.js and npm are installed. Then, open the terminal and execute the following command to create a new Vue project:

$ npm install -g @vue/cli
$ vue create 3d-visualization

After completing the above steps, switch to the project directory in the terminal and execute the following command to install the required dependencies:

$ cd 3d-visualization
$ npm install three vue-threejs --save

Create a new file ThreeModel.vue in the project directory and paste the following code into the file:

<template>
  <div id="canvas-container"></div>
</template>

<script>
import { Scene, PerspectiveCamera, WebGLRenderer, BoxGeometry, MeshBasicMaterial, Mesh } from 'three'

export default {
  mounted () {
    const container = document.getElementById('canvas-container')

    // 创建场景
    const scene = new Scene()

    // 创建相机
    const camera = new PerspectiveCamera(75, container.offsetWidth / container.offsetHeight, 0.1, 1000)
    camera.position.z = 5

    // 创建渲染器
    const renderer = new WebGLRenderer()
    renderer.setSize(container.offsetWidth, container.offsetHeight)
    container.appendChild(renderer.domElement)

    // 创建立方体
    const geometry = new BoxGeometry()
    const material = new MeshBasicMaterial({ color: 0x00ff00 })
    const cube = new Mesh(geometry, material)
    scene.add(cube)

    // 渲染场景
    function animate () {
      requestAnimationFrame(animate)

      cube.rotation.x += 0.01
      cube.rotation.y += 0.01

      renderer.render(scene, camera)
    }
    animate()
  }
}
</script>

<style>
#canvas-container {
  width: 100%;
  height: 100%;
}
</style>

In the App.vue file Introduce the ThreeModel component in:

<template>
  <div id="app">
    <ThreeModel />
  </div>
</template>

<script>
import ThreeModel from './ThreeModel.vue'

export default {
  components: {
    ThreeModel
  }
}
</script>

Finally, execute the following command in the terminal to start the Vue development server:

$ npm run serve

Now, open the browser and visit http ://localhost:8080, you will see a simple 3D cube rotating on the page.

This code first obtains a container element canvas-container in the mounted life cycle hook, and then creates a scene, camera and renderer. Next, I created a cube using BoxGeometry and set its color through MeshBasicMaterial. Finally, in the animation function animate, the cube is rotated and the scene is re-rendered.

The above are the steps on how to use Vue and Canvas to create a visual display application of 3D models. By combining Vue's component development and Canvas' drawing capabilities, we can more easily create more complex 3D model visualization applications. Hope this article is helpful to you!

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