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Store number of resolutions in member variable

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This commit is contained in:
Tom Payne
2012-07-07 13:27:59 +02:00
committed by Tom Payne
parent ff34400d96
commit 9a89814896
1 changed files with 9 additions and 4 deletions
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13
src/ol/tilegrid.js
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@@ -29,6 +29,12 @@ ol.TileGrid = function(resolutions, extent, corner, origin, opt_tileSize) {
return -goog.array.defaultCompare(a, b);
}, true));
/**
* @private
* @type {number}
*/
this.numResolutions_ = this.resolutions_.length;
/**
* @private
* @type {ol.Extent}
@@ -56,7 +62,7 @@ ol.TileGrid = function(resolutions, extent, corner, origin, opt_tileSize) {
if (origin instanceof goog.math.Coordinate) {
this.origin_ = origin;
} else if (goog.isArray(origin)) {
goog.asserts.assert(origin.length == this.resolutions_.length);
goog.asserts.assert(origin.length == this.numResolutions_);
this.origins_ = origin;
} else {
goog.asserts.assert(false);
@@ -116,7 +122,7 @@ ol.TileGrid.prototype.getOrigin = function(z) {
* @return {number} Resolution.
*/
ol.TileGrid.prototype.getResolution = function(z) {
goog.asserts.assert(0 <= z && z < this.resolutions_.length);
goog.asserts.assert(0 <= z && z < this.numResolutions_);
return this.resolutions_[z];
};
@@ -224,8 +230,7 @@ ol.TileGrid.prototype.getTileSize = function() {
* @return {number} Tile resolution.
*/
ol.TileGrid.prototype.getTileResolution = function(tileCoord) {
goog.asserts.assert(
0 <= tileCoord.z && tileCoord.z < this.resolutions_.length);
goog.asserts.assert(0 <= tileCoord.z && tileCoord.z < this.numResolutions_);
return this.resolutions_[tileCoord.z];
};