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Merge pull request #338 from twpayne/snap-center-to-pixel2

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Snap center to pixel
This commit is contained in:
Tom Payne
2013-03-11 08:41:28 -07:00
parent 837aa7512b 505c607ccb
commit 8b5194da38
7 changed files with 140 additions and 33 deletions
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test/spec/ol/extent.test.js
+51
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@@ -97,8 +97,59 @@ describe('ol.Extent', function() {
});
});
describe('getForView2DAndSize', function() {
it('works for a unit square', function() {
var extent = ol.Extent.getForView2DAndSize(
new ol.Coordinate(0, 0), 1, 0, new ol.Size(1, 1));
expect(extent.minX).toBe(-0.5);
expect(extent.minY).toBe(-0.5);
expect(extent.maxX).toBe(0.5);
expect(extent.maxY).toBe(0.5);
});
it('works for center', function() {
var extent = ol.Extent.getForView2DAndSize(
new ol.Coordinate(5, 10), 1, 0, new ol.Size(1, 1));
expect(extent.minX).toBe(4.5);
expect(extent.minY).toBe(9.5);
expect(extent.maxX).toBe(5.5);
expect(extent.maxY).toBe(10.5);
});
it('works for rotation', function() {
var extent = ol.Extent.getForView2DAndSize(
new ol.Coordinate(0, 0), 1, Math.PI / 4, new ol.Size(1, 1));
expect(extent.minX).toRoughlyEqual(-Math.sqrt(0.5), 1e-9);
expect(extent.minY).toRoughlyEqual(-Math.sqrt(0.5), 1e-9);
expect(extent.maxX).toRoughlyEqual(Math.sqrt(0.5), 1e-9);
expect(extent.maxY).toRoughlyEqual(Math.sqrt(0.5), 1e-9);
});
it('works for resolution', function() {
var extent = ol.Extent.getForView2DAndSize(
new ol.Coordinate(0, 0), 2, 0, new ol.Size(1, 1));
expect(extent.minX).toBe(-1);
expect(extent.minY).toBe(-1);
expect(extent.maxX).toBe(1);
expect(extent.maxY).toBe(1);
});
it('works for size', function() {
var extent = ol.Extent.getForView2DAndSize(
new ol.Coordinate(0, 0), 1, 0, new ol.Size(10, 5));
expect(extent.minX).toBe(-5);
expect(extent.minY).toBe(-2.5);
expect(extent.maxX).toBe(5);
expect(extent.maxY).toBe(2.5);
});
});
});
goog.require('ol.Coordinate');
goog.require('ol.Extent');
goog.require('ol.Size');
goog.require('ol.projection');