How to do virtual reality and augmented reality in PHP?-PHP Tutorial-php.cn

How to do virtual reality and augmented reality in PHP?

王林

Release： 2023-05-21 10:26:01

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With the continuous development of virtual reality (VR) and augmented reality (AR) technologies, more and more developers are beginning to explore how to use these technologies in web development. As a commonly used web development language, PHP is also gradually developing its VR and AR toolkits, which greatly enriches PHP's ability to build highly interactive and high-experience web applications. In this article, we’ll cover how to implement virtual reality and augmented reality development in PHP.

1. What is Virtual Reality and Augmented Reality

Virtual Reality (VR) refers to the use of computer science and technology to provide users with an "immersive experience" by introducing a simulation environment. "Environment" feeling. Users can interact through VR technology, intuitively feel things in the virtual environment and interact with them sensoryly. For example, with the help of VR technology, users can feel as if they are in a work of art, feel the breath of the work, or interact with other players in the virtual game world.

Augmented Reality (AR) refers to the use of computer vision technology to enhance real scenes in the real world, providing users with applications that are more interactive and user-experienced. For example, with the help of AR technology, users can interact with things in real-life scenarios and obtain in-depth information. For example, when we use mobile applications to view scenic spots, AR technology can display more scene information in front of the camera lens, such as historical introductions, architectural landmarks, merchant activities, etc.

2. PHP VR and AR Development Kit

Generally speaking, Web VR and AR development require the use of multiple technologies at the same time: 3D modeling, virtual environment construction, physics engine, plane marking identification etc. However, in PHP, we can leverage existing VR and AR development toolkits to greatly simplify the coding and development process.

A-Frame

A-Frame is a web framework for building virtual reality applications, based on Three.js and WebVR technology. A-Frame supports converting HTML elements into 3D objects and embedding business logic in them, making it very easy to use and learn. A-Frame also supports Unity3D model import, and the loading and use of MixedReality, so it can provide more scalability and customization options for Web VR professionals.

AR.js

AR.js is a cross-browser supported open source framework called "Argon" for creating Web AR applications. AR.js allows users to explore the real world containing virtual objects with realistic rotations, twists and tilts by identifying specific QR codes or flat markers in the user's camera input and mapping them into the AR system. AR.js also supports augmented reality of text, images, and videos, and can be expanded by accessing third-party image/model libraries.

3. Building WebVR and AR Applications

Once you are familiar with the VR and AR development kits, you can try creating your own VR and AR applications in PHP. Here are some common application scenarios.

Add interactive elements in VR

Using the toolkit, we can add interactivity to the virtual environment by converting HTML elements in web applications into 3D objects element.

<html> 
  <head> 
    <script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script> 
  </head> 
  <body> 
    <a-scene> 
      <a-box color="blue" position="-1 0.5 -3" rotation="0 45 0" scale="1 1 1"></a-box> 
      <a-sphere color="green" position="0 1.25 -5" radius="1.25"></a-sphere> 
      <a-cylinder color="red" position="1 0.75 -3" radius="0.5" height="1.5"></a-cylinder> 
      <a-plane color="grey" position="0 0 -4" rotation="-90 0 0" width="4" height="4"></a-plane> 
      <a-sky color="#ECECEC"></a-sky>
    </a-scene> 
  </body> 
</html>

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In the above code, we define four different 3D objects and combine them to display in the VR environment. You can change the position, color, size and other attributes of each object as needed to achieve interaction in the virtual environment.

Add symbol elements in AR

Using the AR.js framework, we can easily integrate flat markers with web applications to achieve interactive functions of augmented reality.

<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script> 
<script src="https://jeromeetienne.github.io/AR.js/aframe/build/aframe-ar.js"></script> 
 
<body style='margin : 0px; overflow: hidden;'> 
  <a-scene embedded arjs> 
    <a-marker preset='hiro'> 
      <a-entity 
        position='0 0 0' 
        geometry='primitive: box' 
        material='color: yellow; opacity: 0.5;' 
      ></a-entity> 
    </a-marker> 
  </a-scene> 
</body>

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In the above code, we define the AR tag "hiro" and add a yellow box inside the tag. By capturing an image with a camera, the AR.js system will instantly recognize and recognize your symbol marker and then add your 3D object in the marked location.

4. The future of virtual reality and augmented reality

The development of virtual reality and augmented reality technology is an irreversible trend, which can bring considerable contributions to the development of many fields and penetrate into laboratories. , factories, games and videos, etc., it has changed the way we work and live. With the popularity of VR and AR technologies, more and more web developers have begun to be attracted by these technologies and join them. In the future, virtual reality and augmented reality will become an indispensable part of web development, supporting more highly interactive and highly immersive web applications, improving user experience and satisfaction while also increasing the market value of applications.

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