Start on a svgutils unit test file

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@1856 eee81c28-f429-11dd-99c0-75d572ba1ddd

editor/math.js

@@ -213,4 +213,22 @@ svgedit.math.snapToAngle = function(x1,y1,x2,y2) {
 	return {x:x, y:y, a:snapangle};
 };
 
+
+// Function: rectsIntersect
+// Check if two rectangles (BBoxes objects) intersect each other
+//
+// Paramaters:
+// r1 - The first BBox-like object
+// r2 - The second BBox-like object
+//
+// Returns:
+// Boolean that's true if rectangles intersect
+svgedit.math.rectsIntersect = function(r1, r2) {
+	return r2.x < (r1.x+r1.width) && 
+		(r2.x+r2.width) > r1.x &&
+		r2.y < (r1.y+r1.height) &&
+		(r2.y+r2.height) > r1.y;
+};
+
+
 })();