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| author | Joar Wandborg <git@wandborg.com> | 2012-01-28 18:47:01 +0100 |
|---|---|---|
| committer | Joar Wandborg <git@wandborg.com> | 2012-01-28 18:47:01 +0100 |
| commit | 3d0d3bc97270095fae5f9a2508068631c46a5e61 (patch) | |
| tree | 76778fcacaae35fc5662f276dab512a07bcee186 /extlib/leaflet/src/geometry/Transformation.js | |
| parent | d7bec8577ea1b4d83df097f586324445fed1ef50 (diff) | |
| parent | 9542a2ba076b7e00e79d7adb1a4e90a095427645 (diff) | |
| download | mediagoblin-3d0d3bc97270095fae5f9a2508068631c46a5e61.tar.lz mediagoblin-3d0d3bc97270095fae5f9a2508068631c46a5e61.tar.xz mediagoblin-3d0d3bc97270095fae5f9a2508068631c46a5e61.zip | |
Merge remote-tracking branch 'joar/exif-rebase'
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 |