javascript - Three.js Raycaster is offset when scollt the page -


if scene not show on page , can sroll , raycaster stops working , offset have scrolled .

srollt side 20 pixels down , have 20 pixels below object click , object raycaster recognizes correctly .

how fix problem?

would grateful help

use 

var rect = renderer.domelement.getboundingclientrect(); mouse.x = ( ( event.clientx - rect.left ) / ( rect.width - rect.left ) ) * 2 - 1; mouse.y = - ( ( event.clienty - rect.top ) / ( rect.bottom - rect.top) ) * 2 + 1;

will works you. here demo, scroll bottom click cube.

<!doctype html>  <html>  <head>  <script src="http://threejs.org/build/three.min.js"></script>        <link rel="stylesheet" href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" />      <style>  body {      font-family: monospace;      background-color: #fff;      margin: 0px;  }    #canvas {      background-color: #000;      width: 200px;      height: 200px;      border: 1px solid black;      margin: 10px;      padding: 0px;      top: 10px;      left: 100px;  }    .border {      padding:10px;       margin:10px;  	height:3000px;  	overflow:scroll;  }    </style>  </head>  <body>  <div class="border">    <div style="min-height:1000px;"></div>  	<div class="border">  		<div id="canvas"></div>  	</div>  </div>  <script>  // three.js ray.intersects offset canvas    var container, camera, scene, renderer, mesh,        objects = [],            count = 0,        canvas_width = 200,      canvas_height = 200;    // info  info = document.createelement( 'div' );  info.style.position = 'absolute';  info.style.top = '30px';  info.style.width = '100%';  info.style.textalign = 'center';  info.style.color = '#f00';  info.style.backgroundcolor = 'transparent';  info.style.zindex = '1';  info.style.fontfamily = 'monospace';  info.innerhtml = 'intersect count: ' + count;  info.style.userselect = "none";  info.style.webkituserselect = "none";  info.style.mozuserselect = "none";  document.body.appendchild( info );    container = document.getelementbyid( 'canvas' );    renderer = new three.webglrenderer();  renderer.setsize( canvas_width, canvas_height );  container.appendchild( renderer.domelement );    scene = new three.scene();    camera = new three.perspectivecamera( 45, canvas_width / canvas_height, 1, 1000 );  camera.position.y = 250;  camera.position.z = 500;  camera.lookat( scene.position );  scene.add( camera );    scene.add( new three.ambientlight( 0x222222 ) );    var light = new three.pointlight( 0xffffff, 1 );  camera.add( light );    mesh = new three.mesh(   	new three.boxgeometry( 200, 200, 200, 1, 1, 1 ),   	new three.meshphongmaterial( { color : 0x0080ff }   ) );  scene.add( mesh );  objects.push( mesh );    // find intersections  var raycaster = new three.raycaster();  var mouse = new three.vector2();    // mouse listener  document.addeventlistener( 'mousedown', function( event ) {         var rect = renderer.domelement.getboundingclientrect();  mouse.x = ( ( event.clientx - rect.left ) / ( rect.width - rect.left ) ) * 2 - 1;  mouse.y = - ( ( event.clienty - rect.top ) / ( rect.bottom - rect.top) ) * 2 + 1;      	raycaster.setfromcamera( mouse, camera );        intersects = raycaster.intersectobjects( objects );        if ( intersects.length > 0 ) {                    info.innerhtml = 'intersect count: ' + ++count;                }    }, false );    function render() {        mesh.rotation.y += 0.01;            renderer.render( scene, camera );    }    (function animate() {        requestanimationframe( animate );        render();    })();    </script>  </body>  </html>


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