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Add more extent functions

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This commit is contained in:
Tom Payne
2013-11-06 19:08:34 +01:00
parent a49e169622
commit 3368576505
1 changed files with 90 additions and 0 deletions
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90
src/ol/extent.js
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@@ -134,6 +134,50 @@ ol.extent.createOrUpdate = function(minX, minY, maxX, maxY, opt_extent) {
};
/**
* @param {ol.Extent=} opt_extent Extent.
* @return {ol.Extent} Extent.
*/
ol.extent.createOrUpdateEmpty = function(opt_extent) {
return ol.extent.createOrUpdate(
Infinity, Infinity, -Infinity, -Infinity, opt_extent);
};
/**
* @param {ol.Coordinate} coordinate Coordinate.
* @param {ol.Extent=} opt_extent Extent.
* @return {ol.Extent} Extent.
*/
ol.extent.createOrUpdateFromCoordinate = function(coordinate, opt_extent) {
var x = coordinate[0];
var y = coordinate[1];
return ol.extent.createOrUpdate(x, y, x, y, opt_extent);
};
/**
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @param {ol.Extent=} opt_extent Extent.
* @return {ol.Extent} Extent.
*/
ol.extent.createOrUpdateFromCoordinates = function(coordinates, opt_extent) {
var extent = ol.extent.createOrUpdateEmpty(opt_extent);
return ol.extent.extendCoordinates(extent, coordinates);
};
/**
* @param {Array.<Array.<ol.Coordinate>>} rings Rings.
* @param {ol.Extent=} opt_extent Extent.
* @return {ol.Extent} Extent.
*/
ol.extent.createOrUpdateFromRings = function(rings, opt_extent) {
var extent = ol.extent.createOrUpdateEmpty(opt_extent);
return ol.extent.extendRings(extent, rings);
};
/**
* Empties extent in place.
* @param {ol.Extent} extent Extent.
@@ -201,6 +245,34 @@ ol.extent.extendCoordinate = function(extent, coordinate) {
};
/**
* @param {ol.Extent} extent Extent.
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @return {ol.Extent} Extent.
*/
ol.extent.extendCoordinates = function(extent, coordinates) {
var i, ii;
for (i = 0, ii = coordinates.length; i < ii; ++i) {
ol.extent.extendCoordinate(extent, coordinates[i]);
}
return extent;
};
/**
* @param {ol.Extent} extent Extent.
* @param {Array.<Array.<ol.Coordinate>>} rings Rings.
* @return {ol.Extent} Extent.
*/
ol.extent.extendRings = function(extent, rings) {
var i, ii;
for (i = 0, ii = rings.length; i < ii; ++i) {
ol.extent.extendCoordinates(extent, rings[i]);
}
return extent;
};
/**
* @param {ol.Extent} extent Extent.
* @param {number} x X.
@@ -362,6 +434,24 @@ ol.extent.normalize = function(extent, coordinate) {
};
/**
* @param {ol.Extent} extent Extent.
* @param {ol.Extent=} opt_extent Extent.
* @return {ol.Extent} Extent.
*/
ol.extent.returnOrUpdate = function(extent, opt_extent) {
if (goog.isDef(opt_extent)) {
opt_extent[0] = extent[0];
opt_extent[1] = extent[1];
opt_extent[2] = extent[2];
opt_extent[3] = extent[3];
return opt_extent;
} else {
return extent;
}
};
/**
* @param {ol.Extent} extent Extent.
* @param {number} value Value.