render thumbnails as masks

1 files changed, 23 insertions, 0 deletions

diff --git a/public/assets/javascripts/rectangles/models/rect.js b/public/assets/javascripts/rectangles/models/rect.js
index a08176a..00f2c55 100644
--- a/public/assets/javascripts/rectangles/models/rect.js
+++ b/public/assets/javascripts/rectangles/models/rect.js
@@ -141,6 +141,29 @@
 	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