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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.x = x0
this.y = y0
}
else if (x1 === undefined) {
this.x = new point(x0,x0)
this.y = new point(y0,y0)
}
else {
this.x = new point(x0,x1)
this.y = new point(y0,y1)
}
}
vec2.prototype.clone = function(){
return new vec2( this.x.clone(), this.y.clone() )
}
vec2.prototype.assign = function(r) {
this.x.assign(r.x)
this.y.assign(r.y)
return this
}
vec2.prototype.center = function(){
return new point(this.x.midpoint(), this.y.midpoint())
}
vec2.prototype.area = function(){
return this.x.length() * this.y.length()
}
vec2.prototype.magnitude = function(){
return dist(this.x.a, this.y.a, this.x.b, this.y.b)
}
vec2.prototype.maxDimension = function(){
return abs(this.width) > abs(this.height) ? this.width : this.height
}
vec2.prototype.mul = function(n){
this.x.mul(n)
this.y.mul(n)
return this
}
vec2.prototype.div = function(n){
this.x.div(n)
this.y.div(n)
return this
}
vec2.prototype.translate = function(translation){
var translation = translation || this.translation
this.x.abs().add(translation.a)
this.y.abs().add(translation.b)
this.translation.a = this.translation.b = 0
return this
}
vec2.prototype.contains = function(x,y){
return this.x.contains(x) && this.y.contains(y)
}
vec2.prototype.contains_point = function(p){
return this.x.contains(p.x) && this.y.contains(p.y)
}
vec2.prototype.containsDisc = function(x,y,r){
return this.x.containsDisc(x,r) && this.y.containsDisc(y,r)
}
vec2.prototype.overlaps = function(rect){
return this.x.overlaps(rect.x) && this.y.overlaps(rect.y)
}
vec2.prototype.intersects = function(r){
var corner_intersect = (this.x.b === r.x.a && this.y.b === r.y.a)
return this.x.intersects(r.x) && this.y.intersects(r.y) && ! corner_intersect
}
vec2.prototype.adjacent = function(r){
return this.x.adjacent(r.x) && this.y.adjacent(r.y)
}
vec2.prototype.eq = function(r){
return this.x.eq(r.x) && this.y.eq(r.y)
}
vec2.prototype.fits = function(v){
return this.x.length() >= v.a && this.y.length() >= v.b
}
vec2.prototype.zero = function(){
this.a.zero()
this.b.zero()
}
// vec2.prototype.nearEdge = function (x, y, r) {
// var edges = 0
// if (x < this.x.a+r) {
// edges |= LEFT
// }
// else if (x > this.x.b-r) {
// edges |= RIGHT
// }
// if (y < this.y.a+r) {
// edges |= FRONT
// }
// else if (y > this.y.b-r) {
// edges |= BACK
// }
// return edges
// }
vec2.prototype.width = function(){ return this.x.length() }
vec2.prototype.height = function(){ return this.y.length() }
vec2.prototype.delta = function(){ return new point( this.x.magnitude(), this.y.magnitude() ) }
vec2.prototype.expand = function(rect){
this.x.a = Math.min( this.x.a, rect.x.a )
this.x.b = Math.max( this.x.b, rect.x.b )
this.y.a = Math.min( this.y.a, rect.y.a )
this.y.b = Math.max( this.y.b, rect.y.b )
return this
}
vec2.prototype.square = function(){
var width = this.x.length()
var height = this.y.length()
var diff
if (width < height) {
diff = (height - width) / 2
this.x.a -= diff
this.x.b += diff
}
else {
diff = (width - height) / 2
this.y.a -= diff
this.y.b += diff
}
return this
}
vec2.prototype.toString = function(){
var s = "[" + this.x.toString() + " " + this.y.toString() + "] "
return s
}
vec2.prototype.exactString = function(){
var s = "[" + this.x.exactString() + " " + this.y.exactString() + "] "
return s
}
vec2.prototype.serialize = function(){
return { x: this.x.serialize(), y: this.y.serialize() }
}
vec2.prototype.quantize = function(n){
this.x.quantize(n)
this.y.quantize(n)
return this
}
if ('window' in this) {
window.vec2 = vec2
}
else {
module.exports = vec2
}
})()
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