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Accurate hit detection

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With this change, hit detection for lines and points gets very
accurate, because the vector renderer instance keeps track of
line widths and point symbol sizes. After doing a bbox query in
the RTree, returned lines and points are evaluated against the
thresholds of their line width or symbol size. The KML example
with its different symbolizers now has getFeatureInfo too to
show this in action.
This commit is contained in:
ahocevar
2013-05-15 23:44:22 +02:00
parent 32ea32521d
commit 037e44e084
5 changed files with 136 additions and 26 deletions
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20
src/ol/extent.js
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@@ -57,16 +57,26 @@ ol.extent.boundingExtentXYs_ = function(xs, ys, opt_extent) {
/**
* Checks if the passed coordinate is contained or on the edge
* Checks if (one of) the passed coordinate(s) is contained or on the edge
* of the extent.
*
* @param {ol.Extent} extent Extent.
* @param {ol.Coordinate} coordinate Coordinate.
* @param {ol.Coordinate|Array.<ol.Coordinate>} coordinates Coordinate(s).
* @return {boolean} Contains.
*/
ol.extent.containsCoordinate = function(extent, coordinate) {
return extent[0] <= coordinate[0] && coordinate[0] <= extent[1] &&
extent[2] <= coordinate[1] && coordinate[1] <= extent[3];
ol.extent.containsCoordinate = function(extent, coordinates) {
coordinates = goog.isArray(coordinates[0]) ? coordinates : [coordinates];
var contains = false,
coordinate, i;
for (i = coordinates.length - 1; i >= 0; --i) {
coordinate = coordinates[i];
if (extent[0] <= coordinate[0] && coordinate[0] <= extent[1] &&
extent[2] <= coordinate[1] && coordinate[1] <= extent[3]) {
contains = true;
break;
}
}
return contains;
};