1 files changed, 81 insertions, 0 deletions
diff --git a/assets/javascripts/rectangles/models/vec2.js b/assets/javascripts/rectangles/models/vec2.js
new file mode 100644
index 0000000..4e2ad36
--- /dev/null
+++ b/assets/javascripts/rectangles/models/vec2.js
@@ -0,0 +1,81 @@
+function vec2(a,b){
+	this.a = a
+	this.b = b
+}
+vec2.prototype.magnitude = function(){
+	return this.b-this.a
+}
+vec2.prototype.length = function(){
+	return abs(this.b-this.a)
+}
+vec2.prototype.clone = function(){
+	return new vec2(this.a, this.b)
+}
+vec2.prototype.abs = function(){
+	if (this.b < this.a) {
+		this.a = this.a ^ this.b
+		this.b = this.a ^ this.b
+		this.a = this.a ^ this.b
+	}
+	return this
+}
+vec2.prototype.midpoint = function(){
+	return lerp(0.5, this.a, this.b)
+}
+vec2.prototype.eq = function(v){
+	return this.a == v.a && this.b == v.b
+}
+vec2.prototype.add = function(n){
+	this.a += n
+	this.b += n
+}
+vec2.prototype.sub = function(n){
+	this.a -= n
+	this.b -= n
+}
+vec2.prototype.mul = function(n){
+	this.a *= n
+	this.b *= n
+}
+vec2.prototype.div = function(n){
+	this.a /= n
+	this.b /= n
+}
+vec2.normalize = function(){
+	var dim = max(this.a, this.b)
+	this.a = this.a/dim
+	this.b = this.b/dim
+}
+vec2.prototype.contains = function(n){
+	return this.a <= n && n <= this.b
+}
+vec2.prototype.intersects = function(v){
+	if (this.a < v.a) {
+		return (v.a < this.b && this.b <= v.b) || (this.a < v.b && v.b <= this.b)
+	}
+	else if (this.a == v.a) {
+		return true
+	}
+	else if (this.a > v.a) {
+		return (this.a < v.b && v.b <= this.b) || (v.a < this.b && this.b <= v.b)
+	}
+}
+vec2.prototype.union = function(v){
+	if (this.intersects(v)) {
+	  return new vec2( min(this.a,v.a), max(this.b, v.b) )
+	}
+}
+vec2.prototype.intersection = function(v){
+	if (this.intersects(v)) {
+	  return new vec2( max(this.a,v.a), min(this.b, v.b) )
+	}
+}
+vec2.prototype.toString = function(){
+	return "[" + this.a + " " + this.b + "]"
+}
+vec2.prototype.quantize = function(n){
+	n = n || 10
+	this.a = quantize(this.a, n)
+	this.b = quantize(this.b, n)
+}
+