【发布时间】：2020-05-02 19:15:16
【问题描述】：
我真的是 A-Frame 和 Ar.js 的新手，从字面上发现了这一点，并从今天开始着手研究。这是我正在做的一个项目，我正在使用本教程https://aframe.io/blog/arjs3/#creating-image-descriptors 我按照说明将“恐龙”图像上传到 NFT 创建者中。它说我会下载三个图像，我下载了，它们以 fset3、fset 和 iset 结尾。我尝试单击下载的图像并收到一条消息，说“没有应用程序设置来打开文档，并且看起来像图像链接。（顺便说一下，我使用的是 Mac）。代码如下：
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>Image based tracking AR.js demo</title>
<!-- import aframe and then ar.js with image tracking / location based features -->
<script src="https://aframe.io/releases/1.0.4/aframe.min.js"></script>
<script src="https://raw.githack.com/AR-js-org/AR.js/master/aframe/build/aframe-ar-nft.js"></script>
<!-- style for the loader -->
<style>
.arjs-loader {
height: 100%;
width: 100%;
position: absolute;
top: 0;
left: 0;
background-color: rgba(0, 0, 0, 0.8);
z-index: 9999;
display: flex;
justify-content: center;
align-items: center;
}
.arjs-loader div {
text-align: center;
font-size: 1.25em;
color: white;
}
</style>
</head>
<body style="margin : 0px; overflow: hidden;">
<!-- minimal loader shown until image descriptors are loaded. Loading may take a while according to the device computational power -->
<div class="arjs-loader">
<div>Loading, please wait...</div>
</div>
<!-- a-frame scene -->
<a-scene
vr-mode-ui="enabled: false;"
renderer="logarithmicDepthBuffer: true;"
embedded
arjs="trackingMethod: best; sourceType: webcam;debugUIEnabled: false;">
<!-- a-nft is the anchor that defines an Image Tracking entity -->
<!-- on 'url' use the path to the Image Descriptors created before. -->
<!-- the path should end with the name without the extension e.g. if file is trex.fset' the path should end with trex -->
<a-nft
type="nft"
url="<path-to-your-image-descriptors>"
smooth="true"
smoothCount="10"
smoothTolerance=".01"
smoothThreshold="5">
<!-- as a child of the a-nft entity, you can define the content to show. here's a GLTF model entity -->
<a-entity
gltf-model="https://arjs-cors-proxy.herokuapp.com/https://raw.githack.com/AR-js-org/AR.js/master/aframe/examples/image-tracking/nft/trex/scene.gltf"
scale="5 5 5"
position="100 100 0"
>
</a-entity>
</a-nft>
<!-- static camera that moves according to the device movemenents -->
<a-entity camera></a-entity>
</a-scene>
</body>
</html>```
I understand that I need to input the image descriptor in "url="<path-to-your-image-descriptors>" but I'm stuck on getting to that point.
【问题讨论】：
-
使用网络服务器提供您的文件。浏览器无权访问本地文件系统。 npmjs.com/package/http-server
标签： aframe descriptor ar.js