VueJS

Awesome 3D experience with VueJS and TresJS: a beginner's guide

Published Jun 12, 2024

Updated Jun 12, 2024

3 min read

Awesome 3D experience with VueJS and TresJS: a beginner's guide

Vue.js developers are renowned for raving about the ease, flexibility, and speed of development their framework offers. Tres.js builds on this love for Vue by becoming the missing piece for seamless 3D integration. As a Vue layer for Three.js, Tres.js allows you to leverage the power of Three.js, a popular 3D library, within the familiar and beloved world of Vue components. This means you can create stunning 3D graphics and animations directly within your Vue applications, all while maintaining the clean and efficient workflow you've come to expect.

TresJS is a library specifically designed to make incorporating WebGL (the web's 3D graphics API) into your Vue.js projects a breeze. It boasts several key features that make 3D development with Vue a joy:

Declarative Approach: Build your 3D scenes like you would any other Vue component, leveraging the power and familiarity of Vue's syntax. This makes it intuitive and easy to reason about your 3D elements.
Powered by Vite: Experience blazing-fast development cycles with Vite's Hot Module Replacement (HMR) that keeps your scenes updated in real-time, even as your code changes.
Up-to-date Features: Tres.js stays on top of the latest Three.js releases, ensuring you have immediate access to the newest features and functionality.
Thriving Ecosystem: The Tres.js ecosystem offers many resources to enhance your development experience. This includes:
- Cientos: A collection of pre-built components and helpers that extend the capabilities of Tres.js, allowing you to focus on building your scene's functionality rather than reinventing the wheel (https://cientos.tresjs.org/).
- TresLeches: A powerful state management solution specifically designed for 3D applications built with Tres.js (https://tresleches.tresjs.org/).

You can try TresJS online using their official Playground or on their StackBlitz starter.

But now, let's dive into a quick code example to showcase the simplicity of creating a 3D scene with TresJS.

Setup

First, install the package:

npm install @tresjs/core three

And then, if you are using Typescript, be sure to install the types:

npm install @types/three -D

If you are using Vite, now you need to modify your vite.config.ts file in this way to make the template compiler work with the custom renderer:

import { templateCompilerOptions } from '@tresjs/core'

export default defineConfig({
  plugins: [
    vue({
      // Other config
      ...templateCompilerOptions
    }),
  ],
})

Create our Scene

Imagine a 3D scene as a virtual stage. To bring this stage to life, we need a few key players working together:

Scene: Think of this as the container that holds everything in your 3D world. It acts as the canvas where all the objects, lights, and the camera reside, defining the overall environment.
Renderer: This is the magician behind the curtain, responsible for taking all the elements in your scene and translating them into what you see on the screen. It performs the complex calculations needed to transform your 3D scene into 2D pixels displayed on your browser.
Camera: Like a real camera, this virtual camera defines the perspective from which you view your scene. You can position and adjust the camera to zoom in, zoom out, or explore different angles within your 3D world.
- To make our camera dynamic and allow canvas exploration, we are going to leverage the client's OrbitControls component. Below are our examples. You will see that we just include the component in our canvas, and it just works.
Objects: These actors bring your scene to life. They can be anything from simple geometric shapes like spheres and cubes to complex models like characters or buildings. You create the visual elements that tell your story by manipulating and animating these objects.

Starting from the beginning: to create our Scene with TresJS we just need to use our component TresCanvas in our Vue component's template:

<script lang="ts" setup>  
import { TresCanvas } from '@tresjs/core'  
</script>  
<template>  
	<TresCanvas window-size>  
	<!-- Your scene goes here -->  
	</TresCanvas>  
</template>

The TresCanvas component is going to do some setup work behind the scenes:

It creates a WebGLRenderer that automatically updates every frame.
It sets the render loop to be called on every frame based on the browser refresh rate.

Using the window-size property, we force the canvas to take the width and height of our full window.

So with TresCanvas component we have created our Renderer and our Scene.

Let's move to the Camera:

<script lang="ts" setup>  
import { TresCanvas } from '@tresjs/core'  
</script>  
<template>  
	<TresCanvas window-size>  
		<TresPerspectiveCamera /> 
	</TresCanvas>  
</template>

We just have to add the TresPerspectiveCamera component to our scene.

NOTE: It's important that all scene-related components live between the TresCanvas component.

Now, only the main actor is missing, let's add some styles and our object inside the scene. Our Vue component will now look like:

<script  setup  lang="ts">
import  { TresCanvas }  from  '@tresjs/core';
import { OrbitControls } from ‘@tresjs/cientos’;
</script>

<template>
<TresCanvas clearColor='midnightblue' window-size>
	<OrbitControls/>
	<TresPerspectiveCamera />
	<TresMesh>
		<TresBoxGeometry  :args="[1,  1,  1]" />
	</TresMesh>
</TresCanvas>
</template>

And our scene will be:

A Mesh is a basic scene object in three.js, and it's used to hold the geometry and the material needed to represent a shape in 3D space.

As we can see, we can achieve the same with TresJS using the TresMesh component, and between the default slots, we are just passing our object (a Box in our example).

One interesting thing to notice is that we don't need to import anything. That's because TresJS automatically generates a Vue Component based on the three objects you want to use in PascalCase with a Tres prefix.

Now, if we want to add some color to our object the Three.js Material class comes to help us. We need to add:

<script  setup  lang="ts">
import  { TresCanvas }  from  '@tresjs/core';
import { OrbitControls } from ‘@tresjs/cientos’;
</script>

<template>
<TresCanvas clearColor='midnightblue' window-size>
<OrbitControls/>
	<TresPerspectiveCamera />
	<TresMesh>
		<TresBoxGeometry  :args="[1,  1,  1]" />
		<TresMeshBasicMaterial  :color="'#DC143C'"  :transparent="true"  :opacity="0.25" />
	</TresMesh>
</TresCanvas>
</template>

Conclusion

Tres.js not only supercharges Vue.js applications with stunning 3D graphics, but it also integrates seamlessly with Nuxt.js, enabling you to harness the performance benefits of server-side rendering (SSR) for your 3D creations. This opens the door to building exceptional web experiences that are both interactive and performant.

With Tres.js, Vue.js developers can leverage a declarative approach, cutting-edge features, and a vast ecosystem to bring their immersive web visions to life. If you want to elevate your Vue.js projects with a new dimension, Tres.js is an excellent choice to explore.

This Dot is a consultancy dedicated to guiding companies through their modernization and digital transformation journeys. Specializing in replatforming, modernizing, and launching new initiatives, we stand out by taking true ownership of your engineering projects.

We love helping teams with projects that have missed their deadlines or helping keep your strategic digital initiatives on course. Check out our case studies and our clients that trust us with their engineering.

About the author(s)

Mattia Magi

Getting started with Vitepress

Getting started with Vitepress to create your blog site Have you heard about Vitepress, but you have not checked it out at it yet? Well, in this article, we are going to cover the basic setup and share what all the fuss about this new fantastic static site generator. If you are looking for something that would allow you to quickly create a static site with Markdown support, search, Light/Dark theme, advertisement, navigation, and much more, then Vitepress is what you are looking for. Suppose you want some proof of Vitepress's power without having to invest any further time, I suggest you head over to the main Vitepress site (vitepress.dev) and experience what Vitepress can do, as the official site is built on Vitepress! What is Vitepress Vitepress is a powerful Static Site Generator powered by Vite mainly used for Documentation and Blogs with the default theme, and open to customization to be used for anything you may need it to with custom themes and theme overrides.. Vitepress power comes from its low learning curve, powerful configuration settings, and the ability to easily customize it. For example, internationalization is built-in, Theme toggling is built-in and even full-site searches require a single line in the config to be set up. What makes Vitepress so powerful is its extensive configuration and the fact that it can be customized by overriding the existing theme, creating your theme, or simply enhancing pages with custom Vue code. Prerequisites To successfully run the following demo, you will need: - Node.js version 18 or higher. - Terminal for accessing VitePress via its command line interface (CLI). - Text Editor with Markdown syntax support. - VSCode is recommended, along with the official Vue extension. Create your project To create the project, we will follow the steps shown in the official Getting Started guide. If you want to set up a Vitepress project quickly, run the following steps: - Create a new folder mkdir vitepress-tutorial - Access the folder cd vitepress-tutorial - Install Vitepress npm add -D vitepress - Run the Wizard npx vitepress init - Answer the questions: - Where should VitePress initialize the config? - Site title - Site Description - Theme - Do you want Typescript support? - run npm run docs:dev - Enjoy your site. After you run the above steps, your Vitepress will be ready and running as shown below What is available out of the box The site comes fully set up with enough to get you started. Let's see what features are available within the software: - Navbar: The site comes with a Navbar that already includes links to our blog pages - Light/Dark theme: Out of the box theming - Home page: Basic Homepage layout - Blogs: Two different blog posts with sidebar navigation All of the above is available with just 4 files! Let's move forward and see how to customize our app. Overriding the homepage It is time to modify our site by accessing its folders. What you will probably notice when opening the site, is that Vitepress follows a very simple file structure, in fact, a new installation just includes 4 extra files on top of the expected package.json and node_modules. Let's update our homepage to make it more unique. Because Vitepress follows a "file-system based router" we can find this file within the root of the project within a file called index.md. This file will be accessible at "/" or "/index.html" of your site. The content of the file is the following: ` As you can see, the file has no code in it, and it is just driven by configuration, or more specifically in this case Markdown frontmatter, that is a set of configurations accepted by markdown files that help you set up your options such as title, description, og:image. We will describe frontmatter in more detail later in the article. Before we jump into modifying the configuration of the file, you should know that Vitepress has a very extensive and well-detailed documentation site where you can find help if you are stuck or would like to learn more. In this case, we are overriding the "home" page, so the documentation can be found here: Home Page Default Theme configuration. If you read the current file within the homepage, you will notice that it defines a "layout" of "home". This layout displays a main header with CTAs and a set of feature blocks. There are three different layouts available in the Default theme: "home", "doc" and "page". The title and description have already been set from the information we provided from the installation wizard. But the rest is just a basic boiler template. Let's see what we can change: 1) Add a hero image. This image can either be externally sourced or saved within the repository. ` 2) Update the action buttons. ` As shown above, Action buttons have two themes "brand" or "alt" and can accept internal or external links. Vitepress is clever enough to set the external links to open in a new tab and set the rel="noreferrer". 3) Change the feature blocks: Features blocks are great for engaging with the user and telling them what makes your site special. This accepts an icon and some text, so let's change ours with the following: ` The homepage is now completed and updated and it should look like this: Please note that what we did on the homepage is just changing the markdown front matter of the "home" layout. What this means is that if you want to, you can easily customise the page further by either adding more blocks to the layout file or actually by writing and styling the rest of the page as normal. Site configuration In this step, we are going learn about the main site configuration and how we can use it to customize our site. The configuration file can be found in the .vitepress folder under the name of "config.mjs". Just like the homepage layout, the configuration used in the preset file is self-explanatory: ` This file is very important and you are probably going to have it open at all times as it is going to be responsible for the layout of the sidebar navigations of your site. In this section, we are going to learn how to use the Vitepress configuration file to achieve the following: - Modify the sidebar navigation - Enable Search - Add Favicon to your site Modify the sidebar navigation The sidebar is the component displayed on the left-hand side of the blog pages. This is not automatically generated, but it is manually set in this file. You can have more than one navigation, so, for example, you could specify sidebar navigation that shows in pages that have "/blog/" within their path and another one for all markdown pages that have "/tutorials/". Let's see how to implement this: ` With the above code, there will be 2 different sidebars. One will just show if the URL includes "/blog" and the other will be displayed if the path includes "tutorials". Clicking on the above items will give a 404 error as we do not have any pages in that specific location. Still, we can easily fix the issue by creating the two folders "blog" and "tutorial" and creating the required files within these folders in our case are "index.md" and "one.md" for the blog and "index.md" and "two.md" for tutorials. The sidebar has further settings like the ability to create a nested tree or create collapsable menus. You can learn more by checking out the the official documentation on default theme sidebar. Enable Search No documentation or blog site is complete until a search is fully implemented on it. Luckily for us, enabling a site-wide search is extremely simple with Vitepress. Vitepress supports two different search types: a full-text search using minisearch and Algolia based search. In this tutorial, we are going to enable the full-text search. This is fully built-in and requires no external accounts. To enable search, we need to add a "Search" parameter within our themeConfig and set the provider to "local". We can add this right below the socialLinks. ` With just a simple config change, our site will now have a full site search working as shown below: The official search documentation has further information about the look and functionality of the search. Add Favicon to your site Even if the site configuration is very extensive, there are times when you will need to add something within the site-wise page that is not available. In this section we are going to learn how to add specific attributes to the of our site, and specifically how to add a favicon. To add custom values to the head, we are going to use the "head" properties available with the Vitepress configuration. The "head" configuration is an array that accepts an array with the element type (eg. link, script, meta), and an object including all the attributes for that specific element. So for example to replicate the following HTML: ` we would define the following head config: ` We can use this technique to set up metadata and even load fonts or Google Analytics. More info in the site-config head Writing your post In the last section of this article, we are going to learn how to actually write a blog post and also learn how to customize the pages with JS and styles. Writing your first page In the previous section, we created a couple of markdown files, but they are currently empty. Let's see how to create beautiful documentation using the built-in feature of Vitepress. In this section, we are going to work on the file stored in /blog/index.md. This file can be accessed in your browser by accessing "http://localhost:5174/blog/index.html". Blog Frontmatter Every file needs to have a frontmatter defined. This is used to define basic information on the page, such as the title, description, and more. For best SEO results, it is best practice to always define a title and description for a new page. We can do this by adding the following code at the top of our file: ` Frontmatter in Markdown files are delimited by the "---". In the above code, we set our title and description. Vitepress frontmatter supports further config like lastUpdates, sidebar, outline, and more. You can find info on the frontmatter-config documentation. Frontmatter has some global configuration, such as title and description, but also "layout specific" settings that are just available on specific layouts. This is clearly explained in the documentation. Blog Markdown Now that our post frontmatter is set, it is time to write the content of it. This is done using a very extensive markdown engine. Let's start with the basics and write a heading with some text and a link as shown below: ` After saving, our development environment will show the following results: Let's add a couple of headings and a table of contents to our document using [[toc]] to the top of our page: ` The above will produce an unordered list with all our links. The last feature that I want to share about the Vitepress markdown engine is the code editors. The markdown engine used in Vitepress offers extensive features when it comes to code rendering. Features available are "code highlight", "code focus", external snippets loading and much more. The full list of features can be found in the markdown docs. Let's implement a simple code snippet with a line of code focused. This can be achieved by adding "// [!code focus]" at the end of our row. Let's give it a try: ` The output of this will be: Customize your blog with Vue In this last section, we will learn how to customize our code by adding js logic, style, and external components. Before we begin, it is important to understand that when you use the default template of Vitepress, your pages are going to be rendered with Vue. This means that we can expand the individual page's functionality by rendering other vue components and/or writing logic and styles directly on the page. To better explain this concept, we are going to create a team page. Create a file called team.md within the root of our repository. This file will be accessible on "http://localhost:5174/team.html" and will be just a simple Markdown file. First, we set up the frontmatter as before. In this case, we have to specify an additional config called "layout". This will ensure the page has no style or components loaded such as sidebar or aside. ` Then we will have to create our team variable, just like a normal Vue component; we can do so by defining a script setup tag and defining the constant there. ` In the above code, we have imported the VPTeamMembers component from the vitepress/theme and defined an array of members. The values used in the members array are hardcoded, but as you may expect, you can load this information directly from an API. We now have to use the "members" variable within our file. We can do so by writing normal JavaScript. The markdown file will evaluate the JavaScript and render it, so in the following example it will render a specific component. ` Before we move forward we need to define some style as the page is unstyled since we have loaded the layout of "page". 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3 VueJS Component Libraries Perfect for Beginners

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Dec 18, 2024

4 mins

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Awesome 3D experience with VueJS and TresJS: a beginner's guide

Awesome 3D experience with VueJS and TresJS: a beginner's guide

Setup

Create our Scene

Conclusion

Mattia Magi

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