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Add ol.Extent.getForView2DAndSize

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This commit is contained in:
Tom Payne
2013-03-10 14:57:42 +01:00
parent e8b4a29254
commit ed787ba79c
2 changed files with 77 additions and 0 deletions
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26
src/ol/extent.js
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@@ -45,6 +45,32 @@ ol.Extent.boundingExtent = function(var_args) {
};
/**
* @param {ol.Coordinate} center Center.
* @param {number} resolution Resolution.
* @param {number} rotation Rotation.
* @param {ol.Size} size Size.
* @return {ol.Extent} Extent.
*/
ol.Extent.getForView2DAndSize = function(center, resolution, rotation, size) {
var x = resolution * size.width / 2;
var y = resolution * size.height / 2;
var corners = [
new ol.Coordinate(-x, -y),
new ol.Coordinate(-x, y),
new ol.Coordinate(x, -y),
new ol.Coordinate(x, y)
];
var corner;
for (i = 0; i < 4; ++i) {
corner = corners[i];
corner.rotate(rotation);
corner.add(center);
}
return ol.Extent.boundingExtent.apply(null, corners);
};
/**
* Checks if the passed coordinate is contained or on the edge
* of the extent.