0
不久前，我开始在巴比伦，我正在寻找一些方法来查找鼠标在画布上点击时的坐标。我能够很容易地找到一个给定的对象，但不是现场本身（！？）我不知道什么可能是错的，它似乎很愚蠢，但我还没有找到解决方案...如何在Babylon.js场景中找到点击的坐标？
window.addEventListener('DOMContentLoaded', function() {
var canvas = document.getElementById('canvas');
var engine = new BABYLON.Engine(canvas, true);
var createScene = function() {
var scene = new BABYLON.Scene(engine);
scene.clearColor = new BABYLON.Color3.White();
var box = BABYLON.Mesh.CreateBox("Box",4.0,scene);
var camera = new BABYLON.ArcRotateCamera("arcCam",
BABYLON.Tools.ToRadians(45),
BABYLON.Tools.ToRadians(45),
10.0,box.position,scene);
camera.attachControl(canvas,true);
var light = new BABYLON.PointLight("pointLight",new BABYLON.Vector3(
0,10,0),scene);
light.diffuse = new BABYLON.Color3(1,1,1);
var onpickAction = new BABYLON.ExecuteCodeAction(
BABYLON.ActionManager.OnPickTrigger,
function(evt) {
console.log("(",evt.pointerX,",",evt.pointerY,")");
});
//doesn't work (???)
scene.actionManager = new BABYLON.ActionManager(scene);
scene.actionManager.registerAction(onpickAction);
//works fine
box.actionManager = new BABYLON.ActionManager(scene);
box.actionManager.registerAction(onpickAction);
return scene;
}
var scene = createScene();
engine.runRenderLoop(function() {
scene.render();
});
});<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babylonjs/2.5.0/babylon.js"></script>
<style>
#canvas {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
</body>
</html>