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Add ol.geom.flat.transform.translate

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This commit is contained in:
Éric Lemoine
2014-12-15 17:30:57 +01:00
parent 4a311e66d7
commit 374f916b3a
2 changed files with 46 additions and 1 deletions
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31
src/ol/geom/flat/transformflatgeom.js
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@@ -22,7 +22,7 @@ ol.geom.flat.transform.transform2D =
var m13 = goog.vec.Mat4.getElement(transform, 1, 3);
var dest = goog.isDef(opt_dest) ? opt_dest : [];
var i = 0;
var j, jj;
var j;
for (j = offset; j < end; j += stride) {
var x = flatCoordinates[j];
var y = flatCoordinates[j + 1];
@@ -34,3 +34,32 @@ ol.geom.flat.transform.transform2D =
}
return dest;
};
/**
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @param {number} offset Offset.
* @param {number} end End.
* @param {number} stride Stride.
* @param {number} deltaX Delta X.
* @param {number} deltaY Delta Y.
* @param {Array.<number>=} opt_dest Destination.
* @return {Array.<number>} Transformed coordinates.
*/
ol.geom.flat.transform.translate =
function(flatCoordinates, offset, end, stride, deltaX, deltaY, opt_dest) {
var dest = goog.isDef(opt_dest) ? opt_dest : [];
var i = 0;
var j, k;
for (j = offset; j < end; j += stride) {
dest[i++] = flatCoordinates[j] + deltaX;
dest[i++] = flatCoordinates[j + 1] + deltaY;
for (k = j + 2; k < j + stride; ++k) {
dest[i++] = flatCoordinates[k];
}
}
if (goog.isDef(opt_dest) && dest.length != i) {
dest.length = i;
}
return dest;
};

16
test/spec/ol/geom/flat/transformflatgeom.js → test/spec/ol/geom/flat/transformflatgeom.test.js
View File

@@ -62,6 +62,22 @@ describe('ol.geom.flat.transform', function() {
});
describe('ol.geom.flat.transform.translate', function() {
it('translates the coordinates array', function() {
var multiPolygon = new ol.geom.MultiPolygon([
[[[0, 0, 2], [0, 1, 2], [1, 1, 2], [1, 0, 2], [0, 0, 2]]],
[[[2, 2, 3], [2, 3, 3], [3, 3, 3], [3, 2, 3], [2, 2, 3]]]]);
var flatCoordinates = multiPolygon.getFlatCoordinates();
var deltaX = 1;
var deltaY = 2;
ol.geom.flat.transform.translate(flatCoordinates, 0,
flatCoordinates.length, multiPolygon.getStride(),
deltaX, deltaY, flatCoordinates);
expect(flatCoordinates).to.eql([
1, 2, 2, 1, 3, 2, 2, 3, 2, 2, 2, 2, 1, 2, 2,
3, 4, 3, 3, 5, 3, 4, 5, 3, 4, 4, 3, 3, 4, 3]);
});
});
});