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(function(){
var point
if ('window' in this) {
point = window.point
}
else {
point = require('./point')
}
var vec2 = function (x0,y0, x1,y1){
if (x0 instanceof point) {
this.a = x0
this.b = y0
}
else if (x1 === undefined) {
this.a = new point(x0,y0)
this.b = new point(x0,y0)
}
else {
this.a = new point(x0,y0)
this.b = new point(x1,y1)
}
}
vec2.prototype.clone = function(){
return new vec2( this.a.clone(), this.b.clone() )
}
vec2.prototype.delta = function(){ return new point( this.width(), this.height() ) }
vec2.prototype.width = function(){ return this.b.x - this.a.x }
vec2.prototype.height = function(){ return this.b.y - this.a.y }
vec2.prototype.toString = function(){
var s = "[" + this.a.toString() + " " + this.b.toString() + "] "
return s
}
vec2.prototype.exactString = function(){
var s = "[" + this.a.exactString() + " " + this.b.exactString() + "] "
return s
}
vec2.prototype.serialize = function(){
return { a: this.a.serialize(), b: this.b.serialize() }
}
vec2.prototype.quantize = function(n){
this.a.quantize(n)
this.b.quantize(n)
return this
}
if ('window' in this) {
window.vec2 = vec2
}
else {
module.exports = vec2
}
})()
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