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Add ol.source.Tile support for wrapping around the x-axis

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This commit is contained in:
Andreas Hocevar
2015-03-22 14:27:19 +01:00
parent c707c5e9db
commit 3e18b85206
15 changed files with 260 additions and 42 deletions
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35
src/ol/tilecoord.js
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@@ -3,6 +3,7 @@ goog.provide('ol.tilecoord');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.math');
/**
@@ -137,3 +138,37 @@ ol.tilecoord.quadKey = function(tileCoord) {
ol.tilecoord.toString = function(tileCoord) {
return ol.tilecoord.getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);
};
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {ol.tilegrid.TileGrid} tilegrid Tile grid.
* @param {ol.Extent} extent Extent.
* @return {ol.TileCoord} Tile coordinate.
*/
ol.tilecoord.wrapX = (function() {
var tmpTileCoord = [0, 0, 0];
return function(tileCoord, tileGrid, extent) {
var z = tileCoord[0];
var x = tileCoord[1];
var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);
if (x < tileRange.minX || x > tileRange.maxX) {
x = goog.math.modulo(x, tileRange.getWidth());
return ol.tilecoord.createOrUpdate(z, x, tileCoord[2], tmpTileCoord);
}
return tileCoord;
};
})();
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {ol.tilegrid.TileGrid} tileGrid Tile grid.
* @param {ol.Extent} extent Extent.
* @return {ol.TileCoord} Tile coordinate.
*/
ol.tilecoord.clipX = function(tileCoord, tileGrid, extent) {
var x = tileCoord[1];
var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, tileCoord[0]);
return (x < tileRange.minX || x > tileRange.maxX) ? null : tileCoord;
};