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Merge pull request #7543 from ahocevar/interiorpoint-donut

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Donut polygon labels do not get a chance to get rendered
This commit is contained in:
Andreas Hocevar
2017-12-06 21:28:12 +01:00
committed by GitHub
parent 88fac957af 046d827784
commit e7bb4373ca
2 changed files with 24 additions and 11 deletions
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24
src/ol/geom/flat/interiorpoint.js
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@@ -24,18 +24,20 @@ ol.geom.flat.interiorpoint.linearRings = function(flatCoordinates, offset,
/** @type {Array.<number>} */
var intersections = [];
// Calculate intersections with the horizontal line
var end = ends[0];
x1 = flatCoordinates[end - stride];
y1 = flatCoordinates[end - stride + 1];
for (i = offset; i < end; i += stride) {
x2 = flatCoordinates[i];
y2 = flatCoordinates[i + 1];
if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {
x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;
intersections.push(x);
for (var r = 0, rr = ends.length; r < rr; ++r) {
var end = ends[r];
x1 = flatCoordinates[end - stride];
y1 = flatCoordinates[end - stride + 1];
for (i = offset; i < end; i += stride) {
x2 = flatCoordinates[i];
y2 = flatCoordinates[i + 1];
if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {
x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;
intersections.push(x);
}
x1 = x2;
y1 = y2;
}
x1 = x2;
y1 = y2;
}
// Find the longest segment of the horizontal line that has its center point
// inside the linear ring.

11
test/spec/ol/geom/polygon.test.js
View File

@@ -550,6 +550,17 @@ describe('ol.geom.Polygon', function() {
expect(interiorPoint.layout).to.be('XYM');
expect(interiorPoint.getCoordinates()).to.eql([0.5, 0.5, 1]);
});
it('returns XYM point for donut polygons', function() {
var geom = new ol.geom.Polygon([
[[0.5, 0.5], [0.5, 2.5], [2.5, 2.5], [2.5, 0.5], [0.5, 0.5]],
[[1, 1], [2, 1], [2, 2], [1, 2], [1, 1]]
]);
var interiorPoint = geom.getInteriorPoint();
expect(interiorPoint.getType()).to.be('Point');
expect(interiorPoint.layout).to.be('XYM');
expect(interiorPoint.getCoordinates()).to.eql([0.75, 1.5, 0.5]);
});
});
describe('ol.geom.Polygon.fromExtent', function() {