Javascript threejs多场景和鼠标事件

Question

我正在使用Threejs进行集装箱货物装载互动计划。由于我的货物装载计划是一层一层的容器。所以我想将浏览器划分为多个场景。每个场景代表一个图层。每层都有自己的货箱布置，操作员可以进行一些调整。并且所有货箱都是立方体形状。

我的代码基于示例webgl_interactive_cubes_ortho.html（r82），我在示例中没有那么多立方体，因此我稍微修改了代码示例。

示例代码有效，但只有一个场景具有Viewport。由于我想垂直划分浏览器，所以我开始将高度划分为2个场景。然后我甚至将Viewport划分为2，在脚本中查看Render方法，然后我无法捕获鼠标按下事件中选择的对象。

我认为是因为鼠标点击和3D场景变换计算。无论如何，在我的情况下，我只想选择对象并拖放。任何人都可以帮助我选择对象并进行拖放操作？

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//var height = renderer.domElement.height/2; //only want to divide into two layers

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			var container, stats;
			var camera, scene, scene2, raycaster, renderer;
			var cameras =[];
			var mouse = new THREE.Vector2(), INTERSECTED,SELECTED;
			var radius = 500, theta = 0;
			var offset = new THREE.Vector3();
			var frustumSize = 1000;
			var cubesL0=[], cubesL1=[];
            var plane = new THREE.Plane();
            var intersection = new THREE.Vector3(); 
            var scenes =[];
            var aspect = window.innerWidth / window.innerHeight;
			
			init();
			animate();
			function init() {
				container = document.createElement( 'div' );
				document.body.appendChild( container );
				var info = document.createElement( 'div' );
				info.style.position = 'absolute';
				info.style.top = '10px';
				info.style.width = '100%';
				info.style.textAlign = 'center';
				info.innerHTML = '<a href="http://threejs.org" target="_blank">three.js</a> webgl - interactive cubes';
				container.appendChild( info );
				
				camera = new THREE.OrthographicCamera( frustumSize * aspect / - 2, frustumSize * aspect / 2, frustumSize /2 ,  frustumSize / -2, 1, 1000 );
				
				scene = new THREE.Scene();
				scene2 = new THREE.Scene();
				
				var geometry = new THREE.BoxBufferGeometry( 150, 150, 150 );
				for ( var i = 0; i < 2; i ++ ) {
					var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: 0x000fff } ) );
					if(i==0){
						object.position.x = - 100;
						object.position.y = - 100;
						object.position.z = - 100;
				    }else{
				    	object.position.x = 200;
						object.position.y = -359;
						object.position.z = -50;
				    }
					scene.add( object );
					scenes.push(scene);
					cubesL0.push(object);
				}

				
				raycaster = new THREE.Raycaster();
				renderer = new THREE.WebGLRenderer();
				renderer.setClearColor( 0xf0f0f0 );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.sortObjects = false;
				container.appendChild(renderer.domElement);

				stats = new Stats();
				container.appendChild( stats.dom );

				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'mousedown', onDocumentMouseDown, false );
                document.addEventListener( 'mouseup', onDocumentMouseUp, false );
				//
				window.addEventListener( 'resize', onWindowResize, false );
			}
			function onWindowResize() {
				var aspect = window.innerWidth / window.innerHeight;
				camera.left   = - frustumSize * aspect / 2;
				camera.right  =   frustumSize * aspect / 2;
				camera.top    =   frustumSize / 2;
				camera.bottom = - frustumSize / 2;
		
				camera.updateProjectionMatrix();
				renderer.setSize( window.innerWidth, window.innerHeight );
			}
			
			function onDocumentMouseMove( event ) {
				event.preventDefault();

				mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
				mouse.y = (- ( event.clientY / window.innerHeight) * 2 + 1);							
                console.log("mouse x:"+mouse.x+", mouse y:"+mouse.y);

				raycaster.setFromCamera( mouse, camera );
 				if ( SELECTED ) {
					if ( raycaster.ray.intersectPlane( plane, intersection ) ) {
						SELECTED.position.copy( intersection.sub( offset ) );
					}
					return;
				}
 
				var intersects = raycaster.intersectObjects( cubesL0 );
				if ( intersects.length > 0 ) {
					console.log(" there is object going to move");
					if ( INTERSECTED != intersects[ 0 ].object ) {
						if ( INTERSECTED ) INTERSECTED.material.color.setHex( INTERSECTED.currentHex );
						INTERSECTED = intersects[ 0 ].object;
						INTERSECTED.currentHex = INTERSECTED.material.color.getHex();

						plane.setFromNormalAndCoplanarPoint(
							camera.getWorldDirection( plane.normal ),
							INTERSECTED.position );
					}
					container.style.cursor = 'pointer';
				} else {
					if ( INTERSECTED ) INTERSECTED.material.color.setHex( INTERSECTED.currentHex );
					INTERSECTED = null;
					container.style.cursor = 'auto';
				}
			}

		
			function onDocumentMouseDown( event ) {
				event.preventDefault();

				raycaster.setFromCamera( mouse, camera );
				var intersects = raycaster.intersectObjects( cubesL0 );
        
                var getTarget = true;
				if ( intersects.length > 0 ) {
				    SELECTED = intersects[ 0 ].object;
					if ( raycaster.ray.intersectPlane( plane, intersection ) ) {
						offset.copy( intersection ).sub( SELECTED.position );
					}
					container.style.cursor = 'move';
				}
		    }


			function onDocumentMouseUp( event ) {
				event.preventDefault();	           
				console.log(" in mouse up event ");
				if ( INTERSECTED ) {
					SELECTED = null;
				}
				container.style.cursor = 'auto';
			}

			//
			function animate() {
				requestAnimationFrame( animate );
				render();
				stats.update();
			}

			function render() {		
                
                var width  = renderer.domElement.width;
				var height = renderer.domElement.height;   
				//var height = renderer.domElement.height/2; //only want to divide into two layers
				var left   = 0;
				var bottom = 0;
				renderer.setViewport( left, bottom, width, height );
				renderer.setScissor( left, bottom, width, height );
				renderer.render( scene, camera );
			}
		</script>

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<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - interactive cubes</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				font-family: Monospace;
				background-color: #f0f0f0;
				margin: 0px;
				overflow: hidden;
			}
		</style>
	</head>
	<body>

<script src="http://threejs.org/build/three.min.js"></script>
<script src="http://threejs.org/examples/js/libs/stats.min.js"></script>


	</body>
</html>

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