Raycaster找不到窗口第二个场景上的相交

Question

我是three.js的新手，并且在同一窗口中有2个场景。似乎光线投射器没有找到相交（仅在第一个场景而不在第二个场景）。我做错了什么？

我在每个场景中创建了一个新的心形。在每个场景中我都有一个射线发生器。我创建了一个新的JavaScript对象cvRenderer，它正在创建场景，并且还具有mousedown事件，该事件将触发raycaster正常工作。第一个场景一切正常，但光线投射器未在第二个场景中找到相交。

var cvRenderer = function () {
    this.scene = null,
    this.camera = null,
    this.renderer = null,
    this.controls = null,
    this.clock = null,
    this.stats = null,
    this.raycaster = null,
    this.INTERSECTED = null,
    this.mouse = null,

    this.init = function (container, width, height) { 
        this.raycaster = new THREE.Raycaster();
        this.mouse = new THREE.Vector2();

        // create main scene
        this.scene = new THREE.Scene();
        this.scene.background = new THREE.Color(0xf0f0f0);

        var SCREEN_WIDTH = width,
            SCREEN_HEIGHT = height;

        // prepare camera
        var VIEW_ANGLE = 45, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 1, FAR = 5000;
        this.camera = new THREE.PerspectiveCamera(VIEW_ANGLE, ASPECT, NEAR, FAR);
        this.scene.add(this.camera);
        //  this.camera.position.set(0, 100, 300);
        this.camera.position.set(0, 100, 1000);
        this.camera.lookAt(new THREE.Vector3(0, 0, 0));

        // prepare renderer
        this.renderer = new THREE.WebGLRenderer({ antialias: true });
        this.renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
        this.renderer.shadowMapEnabled = true;
        this.renderer.shadowMapSoft = true;

        // prepare container
        container.appendChild(this.renderer.domElement);

        // events
        container.addEventListener('mousedown', (event) => {

            event.preventDefault();
            this.setMouse(event.clientX, event.clientY );

            this.findIntersects(event.clientX, event.clientY);

        }, false);

        // prepare controls (OrbitControls)
        this.controls = new THREE.OrbitControls(this.camera, this.renderer.domElement);
        this.controls.target = new THREE.Vector3(0, 0, 0);
        this.controls.maxDistance = 5000;
        this.controls.enableRotate = false;

        // prepare clock
        this.clock = new THREE.Clock();

        var light = new THREE.PointLight(0xffffff, 0.8);
        this.scene.add(light);

        // load a model
        this.loadModel();
    },
    this.findIntersects = function (clientX, clientY) { 
        this.setMouse(clientX, clientY);

        this.raycaster.setFromCamera(this.mouse, this.camera);

        var intersects = this.raycaster.intersectObjects(this.scene.children, true);

        if (intersects.length > 0) {

            intersects[0].object.callback();

        }
    },
    this.setMouse = function (clientX, clientY) { 
        this.mouse.x = (clientX / this.renderer.domElement.clientWidth) * 2 - 1;
        this.mouse.y = - (clientY / this.renderer.domElement.clientHeight) * 2 + 1;
    },
    this.loadModel = function () {
        var extrudeSettings = { depth: 8, bevelEnabled: true, bevelSegments: 2, steps: 2, bevelSize: 1, bevelThickness: 1 };

        var heartShape = new THREE.Shape();
        var x = 0, y = 0;
        heartShape.moveTo(x + 25, y + 25);
        heartShape.bezierCurveTo(x + 25, y + 25, x + 20, y, x, y);
        heartShape.bezierCurveTo(x - 30, y, x - 30, y + 35, x - 30, y + 35);
        heartShape.bezierCurveTo(x - 30, y + 55, x - 10, y + 77, x + 25, y + 95);
        heartShape.bezierCurveTo(x + 60, y + 77, x + 80, y + 55, x + 80, y + 35);
        heartShape.bezierCurveTo(x + 80, y + 35, x + 80, y, x + 50, y);
        heartShape.bezierCurveTo(x + 35, y, x + 25, y + 25, x + 25, y + 25);


        var heartgeometry = new THREE.ExtrudeBufferGeometry(heartShape, extrudeSettings);
        var heartmesh = new THREE.Mesh(heartgeometry, new THREE.MeshPhongMaterial({ color: 0xff80f0 }));
        heartmesh.position.set(0, 100, -75);
        heartmesh.rotation.set(0, 0, Math.PI);
        heartmesh.scale.set(1, 1, 1);
        heartmesh.callback = function () {
            console.log("heart was clicked");
        }

        this.scene.add(heartmesh);
    }
};

     var rs = null;
     function animate() {
        requestAnimationFrame(animate);
        render(rs[0]);
        update(rs[0]);
        render(rs[1]);
        update(rs[1]);
    }

    // Update controls and stats
    function update(canvasRenderer) {
        canvasRenderer.controls.update(canvasRenderer.clock.getDelta());
    }

    // Render the scene
    function render(canvasRenderer) {
        if (canvasRenderer.renderer) {
            canvasRenderer.raycaster.setFromCamera(canvasRenderer.mouse, canvasRenderer.camera);
            var intersects = canvasRenderer.raycaster.intersectObjects(canvasRenderer.scene.children, true);
            if (intersects.length > 0) {
                if (canvasRenderer.INTERSECTED != intersects[0].object) {
                    if (canvasRenderer.INTERSECTED) canvasRenderer.INTERSECTED.material.emissive.setHex(canvasRenderer.INTERSECTED.currentHex);
                    canvasRenderer.INTERSECTED = intersects[0].object;
                    canvasRenderer.INTERSECTED.currentHex = canvasRenderer.INTERSECTED.material.emissive.getHex();
                    canvasRenderer.INTERSECTED.material.emissive.setHex(0xfff000);
                }
            } else {
                if (canvasRenderer.INTERSECTED) canvasRenderer.INTERSECTED.material.emissive.setHex(canvasRenderer.INTERSECTED.currentHex);
                canvasRenderer.INTERSECTED = null;
            }
            canvasRenderer.renderer.render(canvasRenderer.scene, canvasRenderer.camera);
        }
    }

    function initializeCanvas() {
        this.container = document.createElement('div');
        document.body.appendChild(this.container);
        var canvasRenderer1 = new cvRenderer();
        canvasRenderer1.init(container, 600, 400, false);


        this.container2 = document.createElement('div');
        document.body.appendChild(this.container2);
        var canvasRenderer2 = new cvRenderer();
        canvasRenderer2.init(container2, 600, 400, false);
        rs = [canvasRenderer1, canvasRenderer2]
        animate();
    }