首先让我说我对 3D 图形非常缺乏经验。
问题
我正在使用 Three.js。我有两个球体（故意）在我的 WebGL 模型中发生碰撞。当我的球体非常大时，重叠的球体在它们相交的地方看起来“破碎”，但较小的球体渲染得非常好。
我对某些对象使用如此大的单位有一个非常具体的原因，并且缩小对象并不是一个真正的选择。
例子
这是更大领域的小提琴：http : //jsfiddle.net/YSX7h/
对于较小的：http : //jsfiddle.net/7Lca2/
代码
var radiusUnits = 1790; // 179000000
var container;
var camera, scene, renderer;
var clock = new THREE.Clock();
var cross;
var plane;
var controls;
var cube;
var cubeMaterial = new THREE.MeshBasicMaterial( { color: 0xffffff, vertexColors: THREE.VertexColors } );
init();
animate();
function init() {
camera = new THREE.PerspectiveCamera(100, window.innerWidth / window.innerHeight, 0.1, 3500000);
controls = new THREE.OrbitControls(camera);
camera.position.set(2000, 2000, 2000);
camera.position.z = 500;
scene = new THREE.Scene();
var texture = THREE.ImageUtils.loadTexture('http://i.imgur.com/qDAEVoo.jpg');
var material = new THREE.MeshBasicMaterial({
color: 0xFFFFFF,
map: texture,
opacity:1
});
var material1 = new THREE.MeshBasicMaterial({ color: 0xFF0000, wireframe: true, opacity:1 });
var geometry = new THREE.SphereGeometry(radiusUnits, 32, 32);
var geometry1 = new THREE.SphereGeometry(radiusUnits, 32, 32);
var mesh = new THREE.Mesh(geometry, material);
var mesh1 = new THREE.Mesh(geometry1, material1);
mesh1.position.set(0, 1000, 0);
mesh.position.set(0, -1000, 0);
scene.add(mesh);
scene.add(mesh1);
renderer = new THREE.WebGLRenderer( { antialias: true, alpha: true } );
document.body.appendChild(renderer.domElement);
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onWindowResize() {
renderer.setSize( window.innerWidth, window.innerHeight );
render();
}
function animate() {
controls.update();
requestAnimationFrame( animate );
}
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
(function animloop(){
requestAnimFrame(animloop);
render();
})();
function render() {
var delta = clock.getDelta();
renderer.render( scene, camera );
}
为什么会发生这种情况？除了缩小这些对象之外，我还能做些什么来解决这个问题？
提前致谢。