我的问题如下：即使鼠标不在立方体上方，鼠标悬停动作也适用于立方体，如果它位于场景之外的立方体上方或下方的 Y 轴上，它也可以工作。有人可以解释一下为什么以及如何解决它吗？
<!DOCTYPE html>
<html lang="fr" xml:lang="fr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js" type="text/javascript"></script>
<script src="lib/Three.js" type="text/javascript"></script>
<script src="lib/Detector.js"></script>
<script src="lib/stats.min.js" type="text/javascript"></script>
<script src="lib/THREEx/THREEx.WindowResize.js"></script>
<script src="lib/THREEx/THREEx.FUllScreen.js"></script>
<script src="lib/TrackballControls.js"></script>
<style type="text/css">
body
{
color: #ffffff;
text-align:center;
background-color: gray;
margin: 0px;
}
#center
{
color: #fff;
position: absolute;
top: 50px; width: 100%;
padding: 5px;
z-index:100;
}
#center h1
{
font-size:60px;
}
#container
{
position:absolute;
bottom:0;
}
</style>
</head>
<body>
<br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/>
<div id="container"></div>
</body>
<script>
// MAIN
console.log("Main.js");
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
// global variables
var container, scene, camera, renderer, stats, controls;
// custom variables
var t = THREE;
var cube;
// to keep track of the mouse position
var projector, INTERSECTED, mouse = { x: 0, y: 0 },
// an array to store our particles in
particles = [];
init();
animate();
function init()
{
// scene
scene = new THREE.Scene();
// camera
var SCREEN_WIDTH = window.innerWidth, SCREEN_HEIGHT = window.innerHeight;
var VIEW_ANGLE = 45, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 0.1, FAR = 20000;
camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR);
scene.add(camera);
camera.position.set(0,0,800);
camera.lookAt(scene.position);
// renderer
renderer = new THREE.CanvasRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
// container
container = document.getElementById('container');
container.appendChild( renderer.domElement );
// stats
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.bottom = '0px';
stats.domElement.style.zIndex = 100;
container.appendChild( stats.domElement );
// events
THREEx.WindowResize(renderer, camera);
THREEx.FullScreen.bindKey({ charCode : 'm'.charCodeAt(0) });
// initialize object to perform world/screen calculations
projector = new THREE.Projector();
// CUSTOM
// Cubes
x = window.innerWidth / 5;
y = window.innerHeight / 10;
console.log(window.innerWidth);
console.log(window.innerHeight);
var geometry = new t.CubeGeometry(125,125,125);
var material = new t.MeshBasicMaterial({color:0xCCCCCC});
cube = new t.Mesh(geometry, material);
cube.name = "cube";
scene.add(cube);
cube.position.set(-x,-y,0);
x = window.innerWidth;
y = window.innerHeight / 10;
var geometry2 = new t.CubeGeometry(125,125,125);
var material2 = new t.MeshBasicMaterial({color:0xCCCCCC});
cube2 = new t.Mesh(geometry2, material2);
scene.add(cube2);
cube2.name = "cube2";
cube2.position.set(0,-y,0);
x = window.innerWidth / 5;
y = window.innerHeight / 10;
var geometry3 = new t.CubeGeometry(125,125,125);
var material3 = new t.MeshBasicMaterial({color:0xCCCCCC});
cube3 = new t.Mesh(geometry3, material3);
cube3.name = "cube3";
scene.add(cube3);
cube3.position.set(x,-y,0);
// particles
makeParticles();
// Mouse events
document.addEventListener( 'mousemove', onMouseMove, false );
document.addEventListener( 'mousedown', onMouseDown, false );
}
// called when the mouse moves
function onMouseMove( event )
{
// store the mouseX and mouseY position
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
}
function onMouseDown( event )
{
event.preventDefault();
var vector = new THREE.Vector3( mouse.x, mouse.y, 1 );
projector.unprojectVector( vector, camera );
var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );
var intersects = ray.intersectObjects( scene.children );
if ( intersects.length > 0 )
{
console.log(INTERSECTED.name);
if(INTERSECTED.name == "cube")
{
page("real");
}
}
}
function animate()
{
cube.rotation.y +=0.005;
cube.rotation.x -=0.005;
cube2.rotation.y +=0.005;
cube2.rotation.x -=0.005;
cube3.rotation.y +=0.005;
cube3.rotation.x -=0.005;
//textMesh.rotation.y +=0.005;
requestAnimationFrame( animate );
render();
update();
}
// creates a random field of Particle objects
function makeParticles()
{
var particle, material;
// we're gonna move from z position -1000 (far away)
// to 1000 (where the camera is) and add a random particle at every pos.
for ( var zpos= -1000; zpos < 1000; zpos+=20 )
{
// we make a particle material and pass through the
// colour and custom particle render function we defined.
material = new THREE.ParticleCanvasMaterial( { program: particleRender } );
// make the particle
particle = new THREE.Particle(material);
// give it a random x and y position between -500 and 500
particle.position.x = Math.random() * 1000 - 500;
particle.position.y = Math.random() * 1000 - 500;
// set its z position
particle.position.z = zpos;
// scale it up a bit
particle.scale.x = particle.scale.y = 10;
// add it to the scene
scene.add( particle );
// and to the array of particles.
particles.push(particle);
}
}
// there isn't a built in circle particle renderer
// so we have to define our own.
function particleRender( context )
{
// we get passed a reference to the canvas context
context.beginPath();
// and we just have to draw our shape at 0,0 - in this
// case an arc from 0 to 2Pi radians or 360º - a full circle!
context.arc( 0, 0, 0.2, 2, Math.PI * 4, true );
context.fillStyle = "white";
context.fill();
};
// moves all the particles dependent on mouse position
function updateParticles()
{
// iterate through every particle
for(var i=0; i<particles.length; i++)
{
particle = particles[i];
// and move it forward dependent on the mouseY position.
particle.position.z += 250 * 0.02;
// if the particle is too close move it to the back
if(particle.position.z>1000) particle.position.z-=2000;
}
}
function render()
{
renderer.render( scene, camera );
}
function update()
{
updateParticles();
stats.update();
// find intersections
// create a Ray with origin at the mouse position
// and direction into the scene (camera direction)
var vector = new THREE.Vector3( mouse.x, mouse.y, 1 );
projector.unprojectVector( vector, camera );
var ray = new THREE.Ray( camera.position, vector.subSelf( camera.position ).normalize() );
// create an array containing all objects in the scene with which the ray intersects
var intersects = ray.intersectObjects( scene.children );
// INTERSECTED = the object in the scene currently closest to the camera
// and intersected by the Ray projected from the mouse position
// if there is one (or more) intersections
if ( intersects.length > 0 )
{
// if the closest object intersected is not the currently stored intersection object
if ( intersects[ 0 ].object != INTERSECTED)
{
// restore previous intersection object (if it exists) to its original scale
if ( INTERSECTED )
{
INTERSECTED.scale.x = INTERSECTED.currentscale.x;
INTERSECTED.scale.y = INTERSECTED.currentscale.y;
INTERSECTED.scale.z = INTERSECTED.currentscale.z;
}
// store reference to closest object as current intersection object
INTERSECTED = intersects[ 0 ].object;
// store scale of closest object (for later restoration)
scalex = INTERSECTED.scale.x;
scaley = INTERSECTED.scale.y;
scalez = INTERSECTED.scale.z;
INTERSECTED.currentscale = { x : scalex , y : scaley, z : scalez };
// set a new scale for closest object
INTERSECTED.scale.x = INTERSECTED.scale.y = INTERSECTED.scale.z = 1.5;
}
}
else // there are no intersections
{
// restore previous intersection object (if it exists) to its original scale
if ( INTERSECTED )
{
INTERSECTED.scale.x = INTERSECTED.currentscale.x;
INTERSECTED.scale.y = INTERSECTED.currentscale.y;
INTERSECTED.scale.z = INTERSECTED.currentscale.z;
}
// remove previous intersection object reference
// by setting current intersection object to "nothing"
INTERSECTED = null;
}
}
// Pour charger une page dynamiquement
function page(page){
$("body").animate({opacity:0},1000, function(){
$("body").empty();
$("body").load(page +'.html');
$("body").animate({opacity:1},1000, function(){
});
});
}
</script>
</html>