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Accept a destination array for transforms

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This allows in-place transforms.
This commit is contained in:
Tim Schaub
2013-03-03 20:24:14 +01:00
parent 7a5e6a06d8
commit 40bde4056b
6 changed files with 67 additions and 37 deletions
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19
test/spec/ol/projection.test.js
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@@ -215,6 +215,21 @@ describe('ol.projection', function() {
expect(output[5]).toRoughlyEqual(52.4827802220782, 1e-9);
});
it('accepts an optional destination array', function() {
var transform = ol.projection.getTransformFromCodes(
'EPSG:3857', 'EPSG:4326');
var input = [-12000000, 5000000];
var output = [];
var got = transform(input, output);
expect(got).toBe(output);
expect(output[0]).toRoughlyEqual(-107.79783409434258, 1e-9);
expect(output[1]).toRoughlyEqual(40.91627447067577, 1e-9);
expect(input).toEqual([-12000000, 5000000]);
});
it('accepts a dimension', function() {
var transform = ol.projection.getTransformFromCodes(
'GOOGLE', 'EPSG:4326');
@@ -225,7 +240,7 @@ describe('ol.projection', function() {
-626172.13571216376, 6887893.4928337997, 100,
-12000000, 5000000, 200,
-626172.13571216376, 6887893.4928337997, 300
], dimension);
], undefined, dimension);
expect(output[0]).toRoughlyEqual(-5.625, 1e-9);
expect(output[1]).toRoughlyEqual(52.4827802220782, 1e-9);
@@ -247,7 +262,7 @@ describe('ol.projection', function() {
it('removes functions cached by addTransform', function() {
var foo = new ol.Projection('foo', units, extent);
var bar = new ol.Projection('bar', units, extent);
var transform = function(intput, dimension) {return input};
var transform = function(input, output, dimension) {return input};
ol.projection.addTransform(foo, bar, transform);
expect(ol.projection.transforms_).not.toBeUndefined();
expect(ol.projection.transforms_.foo).not.toBeUndefined();