Andreas Hocevar
38 lines
1.0 KiB
JavaScript
38 lines
1.0 KiB
JavaScript
goog.provide('ol.geom.flat.flip');
|
|
|
|
goog.require('goog.asserts');
|
|
|
|
|
|
/**
|
|
* @param {Array.<number>} flatCoordinates Flat coordinates.
|
|
* @param {number} offset Offset.
|
|
* @param {number} end End.
|
|
* @param {number} stride Stride.
|
|
* @param {Array.<number>=} opt_dest Destination.
|
|
* @param {number=} opt_destOffset Destination offset.
|
|
* @return {Array.<number>} Flat coordinates.
|
|
*/
|
|
ol.geom.flat.flip.flipXY =
|
|
function(flatCoordinates, offset, end, stride, opt_dest, opt_destOffset) {
|
|
var dest, destOffset;
|
|
if (goog.isDef(opt_dest)) {
|
|
dest = opt_dest;
|
|
destOffset = goog.isDef(opt_destOffset) ? opt_destOffset : 0;
|
|
} else {
|
|
goog.asserts.assert(!goog.isDef(opt_destOffset));
|
|
dest = [];
|
|
destOffset = 0;
|
|
}
|
|
var j, k;
|
|
for (j = offset; j < end; ) {
|
|
var x = flatCoordinates[j++];
|
|
dest[destOffset++] = flatCoordinates[j++];
|
|
dest[destOffset++] = x;
|
|
for (k = 2; k < stride; ++k) {
|
|
dest[destOffset++] = flatCoordinates[j++];
|
|
}
|
|
}
|
|
dest.length = destOffset;
|
|
return dest;
|
|
};
|