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不久前，我開始在巴比倫，我正在尋找一些方法來查找鼠標在畫布上點擊時的座標。我能夠很容易地找到一個給定的對象，但不是現場本身（！？）我不知道什麼可能是錯的，它似乎很愚蠢，但我還沒有找到解決方案...如何在Babylon.js場景中找到點擊的座標？
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>