1 files changed, 31 insertions, 0 deletions
diff --git a/extlib/leaflet/src/geometry/Transformation.js b/extlib/leaflet/src/geometry/Transformation.js
new file mode 100644
index 00000000..37f40968
--- /dev/null
+++ b/extlib/leaflet/src/geometry/Transformation.js
@@ -0,0 +1,31 @@
+/*
+ * L.Transformation is an utility class to perform simple point transformations through a 2d-matrix. 
+ */
+
+L.Transformation = L.Class.extend({
+	initialize: function(/*Number*/ a, /*Number*/ b, /*Number*/ c, /*Number*/ d) {
+		this._a = a;
+		this._b = b;
+		this._c = c;
+		this._d = d;
+	},
+
+	transform: function(point, scale) {
+		return this._transform(point.clone(), scale);
+	},
+	
+	// destructive transform (faster)
+	_transform: function(/*Point*/ point, /*Number*/ scale) /*-> Point*/ {	
+		scale = scale || 1;
+		point.x = scale * (this._a * point.x + this._b); 
+		point.y = scale * (this._c * point.y + this._d);
+		return point;
+	},
+	
+	untransform: function(/*Point*/ point, /*Number*/ scale) /*-> Point*/ {
+		scale = scale || 1;
+		return new L.Point(
+			(point.x/scale - this._b) / this._a,
+			(point.y/scale - this._d) / this._c);
+	}
+});
+\ No newline at end of file