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(function(){
var vec2
if ('window' in this) {
vec2 = window.vec2
}
else {
vec2 = require('./vec2')
FRONT = 0x1, BACK = 0x2, LEFT = 0x4, RIGHT = 0x8, FLOOR = 0x10, CEILING = 0x20
TOP = CEILING, BOTTOM = FLOOR
function sidesToString(sides){
var s = ""
if (sides & FRONT) s += "front "
if (sides & BACK) s += "back "
if (sides & LEFT) s += "left "
if (sides & RIGHT) s += "right "
if (sides & TOP) s += "top "
if (sides & BOTTOM) s += "bottom "
return s
}
}
var Rect = function (x0,y0,x1,y1){
if (x0 instanceof vec2) {
this.x = x0
this.y = y0
}
else if (x1 === undefined) {
this.x = new vec2(x0,x0)
this.y = new vec2(y0,y0)
}
else {
this.x = new vec2(x0,x1)
this.y = new vec2(y0,y1)
}
this.translation = new vec2(0,0)
this.sides = FRONT | BACK | LEFT | RIGHT
}
Rect.prototype.clone = function(){
return new Rect( this.x.clone(), this.y.clone() )
}
Rect.prototype.assign = function(r) {
this.x.assign(r.x)
this.y.assign(r.y)
return this
}
Rect.prototype.center = function(){
return new vec2(this.x.midpoint(), this.y.midpoint())
}
Rect.prototype.area = function(){
return this.x.length() * this.y.length()
}
Rect.prototype.magnitude = function(){
return dist(this.x.a, this.y.a, this.x.b, this.y.b)
}
Rect.prototype.maxDimension = function(){
return abs(this.width) > abs(this.height) ? this.width : this.height
}
Rect.prototype.mul = function(n){
this.x.mul(n)
this.y.mul(n)
return this
}
Rect.prototype.div = function(n){
this.x.div(n)
this.y.div(n)
return this
}
Rect.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
}
Rect.prototype.resize = function(translation, sides){
var translation = translation || this.translation
sides = sides || translation.sides
if (sides & LEFT) {
this.x.a += translation.a
}
if (sides & RIGHT) {
this.x.b += translation.a
}
if (sides & FRONT) {
this.y.a += translation.b
}
if (sides & BACK) {
this.y.b += translation.b
}
this.translation.a = this.translation.b = 0
}
Rect.prototype.contains = function(x,y){
return this.x.contains(x) && this.y.contains(y)
}
Rect.prototype.contains_point = function(p){
return this.x.contains(p.x) && this.y.contains(p.y)
}
Rect.prototype.containsDisc = function(x,y,r){
return this.x.containsDisc(x,r) && this.y.containsDisc(y,r)
}
Rect.prototype.overlaps = function(rect){
return this.x.overlaps(rect.x) && this.y.overlaps(rect.y)
}
Rect.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
}
Rect.prototype.adjacent = function(r){
return this.x.adjacent(r.x) && this.y.adjacent(r.y)
}
Rect.prototype.eq = function(r){
return this.x.eq(r.x) && this.y.eq(r.y)
}
Rect.prototype.fits = function(v){
return this.x.length() >= v.a && this.y.length() >= v.b
}
Rect.prototype.zero = function(){
this.a.zero()
this.b.zero()
}
Rect.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
}
Rect.prototype.width = function(){ return this.x.length() }
Rect.prototype.height = function(){ return this.y.length() }
Rect.prototype.delta = function(){ return new vec2( this.x.magnitude(), this.y.magnitude() ) }
Rect.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
}
Rect.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
}
Rect.prototype.toString = function(){
var sides = sidesToString(this.sides)
var s = "[" + this.x.toString() + " " + this.y.toString() + "] " + sides
return s
}
Rect.prototype.exactString = function(){
var sides = sidesToString(this.sides)
var s = "[" + this.x.exactString() + " " + this.y.exactString() + "] " + sides
return s
}
Rect.prototype.serialize = function(){
return { x: this.x.serialize(), y: this.y.serialize() }
}
Rect.prototype.quantize = function(n){
this.x.quantize(n)
this.y.quantize(n)
return this
}
Rect.prototype.split = function(r){
var rz = this
var splits = []
var sides = this.sides
// bisect (or trisect) two overlapping rectangles
var x_intervals = this.x.split( r.x, LEFT, RIGHT )
var y_intervals = this.y.split( r.y, FRONT, BACK )
// generate rectangular regions by crossing the two sets of vectors
x_intervals.forEach(function(x, i){
y_intervals.forEach(function(y, i){
var rn = new Rect(x[0], y[0])
rn.id = rz.id
rn.sides = ((x[1] | y[1]) & sides)
rn.focused = rz.focused
splits.push(rn)
// cull extra walls from overlapping regions
if (r.x.contains(rn.x.a) && r.x.contains(rn.x.b)) {
if (rz.y.a == rn.y.a && r.y.containsCenter(rn.y.a)) { // top edges
rn.sides &= ~ FRONT
}
if (rz.y.b == rn.y.b && r.y.containsCenter(rn.y.b)) { // bottom edges
rn.sides &= ~ BACK
}
}
if (r.y.contains(rn.y.a) && r.y.contains(rn.y.b)) {
if (rz.x.a == rn.x.a && r.x.containsCenter(rn.x.a)) { // left edges
rn.sides &= ~ LEFT
}
if (rz.x.b == rn.x.b && r.x.containsCenter(rn.x.b) ) { // right edges
rn.sides &= ~ RIGHT
}
}
})
})
return splits
}
if ('window' in this) {
window.Rect = Rect
}
else {
module.exports = Rect
}
})()
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