var Box3 = require('./Box3'); 
var Class = require('../../utils/Class'); 
var Vector3 = require('../../math/Vector3'); 
var tempBox3 = new Box3(); 
var tempVec3 = new Vector3(); 
var Sphere = new Class({ 
initialize: function Sphere(center, radius){ 
if (center === undefined) { 
center = new Vector3(); 
} 
if (radius === undefined) { 
radius = 0; 
} 
this.center = center; 
this.radius = radius; 
} 
,
set: function (center, radius){ 
this.center.copy(center); 
this.radius = radius; 
return this; 
} 
,
setFromArray: function (array, gap){ 
if (gap === undefined) { 
gap = 3; 
} 
var center = this.center; 
tempBox3.setFromArray(array, gap).getCenter(center); 
var maxRadiusSq = 0; 
for (var i = 0; 
i < (_AN_Read_length('length', array)); i += gap){ 
tempVec3.fromArray(array, i); 
maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(tempVec3)); 
} 
this.radius = Math.sqrt(maxRadiusSq); 
return this; 
} 
,
applyMatrix4: function (matrix){ 
this.center.applyMatrix4(matrix); 
this.radius = this.radius * matrix.getMaxScaleOnAxis(); 
return this; 
} 
,
getBoundingBox: function (target){ 
if (target === undefined) { 
target = new Box3(); 
} 
target.set(this.center, this.center); 
target.expandByScalar(this.radius); 
return target; 
} 
,
copy: function (sphere){ 
this.center.copy(sphere.center); 
this.radius = sphere.radius; 
return this; 
} 
,
clone: function (){ 
return new Sphere().copy(this); 
} 
}
); 
module.exports = Sphere;