问题描述
我正在开发一个涉及ar.js的项目，该项目显示3d对象和文本，以在移动设备和笔记本电脑上教孩子们学习字母表.我试图添加一个事件监听器作为额外的功能，以使孩子们更多地进行互动.我的目标是单击/触摸显示的模型，它将放大或更改颜色或旋转.附件中找到我的代码.希望你能解决我的问题.
I am developing a project which involves ar.js that is displaying 3d objects and text to teach children the alphabet on both mobile devices and laptops. I was trying to add an event listener as an extra to make the children interact more. My target is to click/touch on the model displayed and it will enlarge or change color or rotation. Attached find my code. Hopefully you could solve my issue.
HTML代码
<!DOCTYPE html>
<html>
<head>
<script src = "https://aframe.io/releases/1.0.3/aframe.min.js"></script>
<script src = "https://cdn.rawgit.com/jeromeetienne/AR.js/1.6.0/aframe/build/aframe-ar.js"></script>
<script src = "event.js"></script>
<script src="https://rawgit.com/donmccurdy/aframe-extras/master/dist/aframe-extras.loaders.min.js"></script>
</head>
<body>
<a-scene embedded arjs = 'sourceType: webcam; debugUIEnabled:false;'>
<a-assets>
<a-asset-item id = "apple" src = "apple/scene.gltf"></a-asset-item>
</a-assets>
<a-marker id = "appleM" type = "pattern" url = "Asset/pattern-apple.patt"
markerhandler emitevents = "true" cursor="rayOrigin: mouse">
<a-entity id = "animatedApple" gltf-model = "#apple" position = "0 -1 0" scale = ".05, .05, .05"></a-entity>
<a-text value="A for Apple" color = "purple" position = "-1.3 1 0" scale = '2, 2, 2'></a-text>
</a-marker>
<a-entity camera></a-entity>
</a-scene>
</body>
</html>
event.js(事件处理程序的文件)
event.js (file for the event handlers)
init: function() {
const animatedMarker = document.querySelector('#appleM');
const aEntity = document.querySelector('#animatedApple');
// every click, we make our model grow in size :)
animatedMarker.addEventListener('click', function(ev, target){
const intersectedElement = ev && ev.detail && ev.detail.intersectedEl;
if (aEntity && intersectedElement === aEntity) {
const scale = aEntity.getAttribute('scale');
Object.keys(scale).forEach((key) => scale[key] = scale[key] + 1);
aEntity.setAttribute('scale', scale);
}
});
}});
推荐答案
我认为主要问题是 a-frame版本1.0.X 的问题.出于某些原因，如果我使用 addEventListerner('click')无效.
I think the main issue is something with a-frame version 1.0.X. For some reason the addEventListerner('click') won't work if I use that.
下面是我的代码，单击您的模型，它应该增加比例.注意:存在有关点击事件不在预期位置的问题.
Below is my code, you click your model and it should increase the scale. Note: there is issue about the click event not at the expected spot.
<!DOCTYPE html>
<html>
<head>
<script src="https://aframe.io/releases/0.9.2/aframe.min.js"></script>
<script src="https://cdn.rawgit.com/jeromeetienne/AR.js/1.7.2/aframe/build/aframe-ar.js"></script>
<!-- IDK Why If I Use This, The addEventListener('click') won't work-->
<!-- <script src = "https://aframe.io/releases/1.0.3/aframe.min.js"></script> -->
<!-- <script src = "https://cdn.rawgit.com/jeromeetienne/AR.js/1.6.0/aframe/build/aframe-ar.js"></script> -->
<script>
AFRAME.registerComponent('button', {
init: function() {
const gltf = document.querySelector('#animatedApple');
var x = gltf.getAttribute('scale').x;
var y = gltf.getAttribute('scale').y;
var z = gltf.getAttribute('scale').z;
// every click, we make our model grow in size :)
gltf.addEventListener('click', function(ev, target){
console.log(gltf.getAttribute('scale'));
gltf.setAttribute('scale', x + " " + y + " "+ z);
x += 0.1;
y += 0.1;
z += 0.1;
});
}
});
</script>
<script src="https://rawgit.com/donmccurdy/aframe-extras/master/dist/aframe-extras.loaders.min.js"></script>
</head>
<body>
<a-scene embedded arjs = 'sourceType: webcam; debugUIEnabled:false;'>
<a-assets>
<a-asset-item id = "apple" src = "apple/scene.gltf"></a-asset-item> <!-- change to your assets -->
</a-assets>
<a-marker id = "appleM" preset="hiro" emitevents="true" button> <!-- change to your marker, i use default hiro.jpg -->
<a-entity cursor="rayOrigin: mouse" raycaster="objects: .clickable; useWorldCoordinates: true;"></a-entity> <!-- important for addEventListener('click'). Notice the '.clickable'-->
<a-entity class="clickable" id ="animatedApple" gltf-model = "#apple" position = "0 0 0" rotation="270 0 0" scale = "0.5 0.5 0.5"></a-entity> <!-- Notice the '.clickable'-->
<a-text id="aText" value="A for Apple" color = "purple" position = "0 0 0" rotation="270 0 0" scale = "2 2 2"></a-text>
</a-marker>
<a-entity camera></a-entity>
</a-scene>
</body>
</html>
这篇关于ar.js中的事件监听器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！