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| author | Aditi <aditi.iitr@gmail.com> | 2013-06-21 23:09:22 +0530 |
|---|---|---|
| committer | Aditi <aditi.iitr@gmail.com> | 2013-06-21 23:09:22 +0530 |
| commit | 2719d546a57c2332e36cc056ac80ec5d79672c1a (patch) | |
| tree | 1f62ab8f761026d4faa5442032df133fc90d47f2 /extlib/leaflet/src/geometry/Transformation.js | |
| parent | 1a6f065419290b3f4234ce4a89bb2c46b13e8a12 (diff) | |
| parent | 92b22e7deac547835f69168f97012b52e87b6de4 (diff) | |
| download | mediagoblin-2719d546a57c2332e36cc056ac80ec5d79672c1a.tar.lz mediagoblin-2719d546a57c2332e36cc056ac80ec5d79672c1a.tar.xz mediagoblin-2719d546a57c2332e36cc056ac80ec5d79672c1a.zip | |
Merge remote-tracking branch 'cweb/master'
Diffstat (limited to 'extlib/leaflet/src/geometry/Transformation.js')
| -rw-r--r-- | extlib/leaflet/src/geometry/Transformation.js | 31 |
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 |