midpoint, center

1 files changed, 6 insertions, 0 deletions

diff --git a/rectangles.html b/rectangles.html
index 086ce27..8878985 100644
--- a/rectangles.html
+++ b/rectangles.html
@@ -40,6 +40,9 @@ vec2.prototype.normalize = function(){
 	}
 	return this
 }
+vec2.prototype.midpoint = function(){
+	return lerp(0.5, this.a, this.b)
+}
 vec2.prototype.add = function(n){
 	this.a += n
 	this.b += n
@@ -92,6 +95,9 @@ function rect (x0,y0,x1,y1){
 rect.prototype.clone = function(){
 	return new rect( this.x.clone(), this.y.clone() )
 }
+rect.prototype.center = function(){
+	return new vec2(this.x.midpoint(), this.y.midpoint())
+}
 rect.prototype.normalize = function(){
 	this.x.normalize().add(this.translation.a)
 	this.y.normalize().add(this.translation.b)