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Add pixel to/from coordinate transforms

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This commit is contained in:
Tom Payne
2012-07-14 19:54:41 +02:00
parent caba3814f7
commit b30d0c314b
1 changed files with 34 additions and 0 deletions
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34
src/ol/map.js
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@@ -128,6 +128,23 @@ ol.Map.prototype.getCenter = function() {
};
/**
* @param {goog.math.Coordinate} pixel Pixel.
* @return {goog.math.Coordinate} Coordinate.
*/
ol.Map.prototype.getCoordinateFromPixel = function(pixel) {
var center = this.getCenter();
goog.asserts.assert(goog.isDef(center));
var resolution = this.getResolution();
goog.asserts.assert(goog.isDef(resolution));
var size = this.getSize();
goog.asserts.assert(goog.isDef(size));
var x = center.x + resolution * (pixel.x - size.width / 2);
var y = center.y - resolution * (pixel.y - size.height / 2);
return new goog.math.Coordinate(x, y);
};
/**
* @return {ol.Extent|undefined} Extent.
*/
@@ -144,6 +161,23 @@ ol.Map.prototype.getLayers = function() {
};
/**
* @param {goog.math.Coordinate} coordinate Coordinate.
* @return {goog.math.Coordinate} Pixel.
*/
ol.Map.prototype.getPixelFromCoordinate = function(coordinate) {
var center = this.getCenter();
goog.asserts.assert(goog.isDef(center));
var resolution = this.getResolution();
goog.asserts.assert(goog.isDef(resolution));
var size = this.getSize();
goog.asserts.assert(goog.isDef(size));
var x = (coordinate.x - center.x) / resolution + size.width / 2;
var y = (center.y - coordinate.y) / resolution + size.height / 2;
return new goog.math.Coordinate(x, y);
};
/**
* @return {ol.Projection} Projection.
*/