blob: 37f4096897680909124337e77b9532f0c9f022b4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
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);
}
});
|
