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EncodedPolyline: Extracted universal decode(encoded, dims) method

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This commit is contained in:
Tobias Bieniek
2012-12-27 23:07:31 +01:00
parent 2c5d4c75d4
commit c118d9884d
2 changed files with 70 additions and 17 deletions
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57
lib/OpenLayers/Format/EncodedPolyline.js
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@@ -61,11 +61,50 @@ OpenLayers.Format.EncodedPolyline = OpenLayers.Class(OpenLayers.Format, {
else if (this.geometryType != "polygon")
return null;
var points = this.decode(encoded, 2);
var pointGeometries = new Array();
for (i in points) {
var point = points[i];
pointGeometries.push(
new OpenLayers.Geometry.Point(point[1] * 1e-5, point[0] * 1e-5)
);
}
if (this.geometryType == "polygon")
return new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon([
new OpenLayers.Geometry.LinearRing(pointGeometries)
])
);
return new OpenLayers.Feature.Vector(
new geomType(pointGeometries)
);
},
/**
* Method: decode
* Deserialize an encoded string and return an array of n-dimensional
* points.
*
* Parameters:
* encoded - {String} An encoded string
* dims - {int} The dimension of the points that are returned
*
* Returns:
* {Array(Array(int))} An array containing n-dimensional arrays of
* coordinates.
*/
decode: function(encoded, dims) {
var points = new Array();
var point = new Array(0, 0);
var point = new Array(dims);
// Reset the point array
for (var i = 0; i < point.length; ++i)
point[i] = 0;
for (var i = 0; i < encoded.length;) {
for (var dim = 0; dim < 2; ++dim) {
for (var dim = 0; dim < dims; ++dim) {
var result = 0;
var shift = 0;
@@ -79,20 +118,10 @@ OpenLayers.Format.EncodedPolyline = OpenLayers.Class(OpenLayers.Format, {
point[dim] += ((result & 1) ? ~(result >> 1) : (result >> 1));
}
points.push(new OpenLayers.Geometry.Point(point[1] * 1e-5,
point[0] * 1e-5));
points.push(point.slice(0));
}
if (this.geometryType == "polygon")
return new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon([
new OpenLayers.Geometry.LinearRing(points)
])
);
return new OpenLayers.Feature.Vector(
new geomType(points)
);
return points;
},
CLASS_NAME: "OpenLayers.Format.EncodedPolyline"