add geometry.intersects method for all geometry types (closes #1072)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@5458 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
178
examples/intersects.html
Normal file
178
examples/intersects.html
Normal file
@@ -0,0 +1,178 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||||
<head>
|
||||
<title>Geometry Intersections</title>
|
||||
<style type="text/css">
|
||||
html, body {
|
||||
margin: 0;
|
||||
padding: 1em;
|
||||
font: 0.9em Verdana, Arial, sans serif;
|
||||
}
|
||||
input, select, textarea {
|
||||
font: 0.9em Verdana, Arial, sans-serif;
|
||||
}
|
||||
h2 {
|
||||
margin-top: 0.75em;
|
||||
font-size: 1.6em;
|
||||
}
|
||||
#leftcol {
|
||||
position: absolute;
|
||||
top: 0;
|
||||
left: 1em;
|
||||
padding: 0;
|
||||
width: 455px;
|
||||
}
|
||||
#map {
|
||||
width: 450px;
|
||||
height: 225px;
|
||||
border: 1px solid #ccc;
|
||||
}
|
||||
#input {
|
||||
width: 450px;
|
||||
}
|
||||
#text {
|
||||
font-size: 0.85em;
|
||||
margin: 1em 0 1em 0;
|
||||
width: 100%;
|
||||
height: 10em;
|
||||
}
|
||||
#info {
|
||||
position: relative;
|
||||
padding: 2em 0;
|
||||
margin-left: 470px;
|
||||
}
|
||||
#features {
|
||||
font-size: 0.8em;
|
||||
width: 100%;
|
||||
height: 200px;
|
||||
}
|
||||
#intersections {
|
||||
font-size: 0.8em;
|
||||
width: 100%;
|
||||
height: 200px;
|
||||
}
|
||||
p {
|
||||
margin: 0;
|
||||
padding: 0.75em 0 0.75em 0;
|
||||
}
|
||||
</style>
|
||||
<script src="../lib/Firebug/firebug.js"></script>
|
||||
<script src="../lib/OpenLayers.js"></script>
|
||||
<script type="text/javascript">
|
||||
var map, vectors, geojson;
|
||||
function init(){
|
||||
map = new OpenLayers.Map('map');
|
||||
vectors = new OpenLayers.Layer.Vector(
|
||||
"Vector Layer",
|
||||
{isBaseLayer: true}
|
||||
);
|
||||
|
||||
map.addLayers([vectors]);
|
||||
map.addControl(new OpenLayers.Control.MousePosition());
|
||||
|
||||
var panel = new OpenLayers.Control.EditingToolbar(vectors);
|
||||
map.addControl(panel);
|
||||
|
||||
geojson = new OpenLayers.Format.GeoJSON();
|
||||
|
||||
map.setCenter(new OpenLayers.LonLat(0, 0), 1);
|
||||
}
|
||||
|
||||
function serialize() {
|
||||
var str = geojson.write(vectors.features, true);
|
||||
document.getElementById('features').value = str;
|
||||
}
|
||||
|
||||
function deserialize() {
|
||||
var element = document.getElementById('text');
|
||||
var features = geojson.read(element.value);
|
||||
var bounds;
|
||||
if(features) {
|
||||
if(features.constructor != Array) {
|
||||
features = [features];
|
||||
}
|
||||
for(var i=0; i<features.length; ++i) {
|
||||
if (!bounds) {
|
||||
bounds = features[i].geometry.getBounds();
|
||||
} else {
|
||||
bounds.extend(features[i].geometry.getBounds());
|
||||
}
|
||||
|
||||
}
|
||||
vectors.addFeatures(features);
|
||||
map.zoomToExtent(bounds);
|
||||
var plural = (features.length > 1) ? 's' : '';
|
||||
element.value = features.length + ' feature' + plural + ' added'
|
||||
} else {
|
||||
element.value = 'Bad input';
|
||||
}
|
||||
}
|
||||
|
||||
function intersect() {
|
||||
var features = vectors.features;
|
||||
var feat1, feat2, intersects12, intersects21;
|
||||
var parts = [];
|
||||
// reset attributes
|
||||
for(var i=0; i<features.length; ++i) {
|
||||
features[i].attributes.intersectsWith = [];
|
||||
}
|
||||
for(var i=0; i<features.length-1; ++i) {
|
||||
feat1 = features[i];
|
||||
for(var j=i+1; j<features.length; ++j) {
|
||||
feat2 = features[j];
|
||||
intersects12 = feat1.geometry.intersects(feat2.geometry);
|
||||
if(intersects12) {
|
||||
feat1.attributes.intersectsWith.push("f" + j);
|
||||
parts.push("f" + i + " intersects f" + j + "\n");
|
||||
}
|
||||
intersects21 = feat2.geometry.intersects(feat1.geometry);
|
||||
if(intersects21) {
|
||||
feat2.attributes.intersectsWith.push("f" + i);
|
||||
parts.push("f" + j + " intersects f" + i + "\n");
|
||||
}
|
||||
if(intersects12 != intersects21) {
|
||||
parts.push("trouble with " + i + " and " + j + "\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
if(parts.length > 0) {
|
||||
document.getElementById("intersections").value = parts.join("");
|
||||
} else {
|
||||
document.getElementById("intersections").value = "no intersections";
|
||||
}
|
||||
}
|
||||
|
||||
// preload images
|
||||
(function() {
|
||||
var roots = ["draw_point", "draw_line", "draw_polygon", "pan"];
|
||||
var onImages = [];
|
||||
var offImages = [];
|
||||
for(var i=0; i<roots.length; ++i) {
|
||||
onImages[i] = new Image();
|
||||
onImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
|
||||
offImages[i] = new Image();
|
||||
offImages[i].src = "../theme/default/img/" + roots[i] + "_on.png";
|
||||
}
|
||||
})();
|
||||
|
||||
</script>
|
||||
</head>
|
||||
<body onload="init()">
|
||||
<div id="leftcol">
|
||||
<h2>OpenLayers Geometry Intersection Example</h2>
|
||||
<div id="map"></div>
|
||||
<div id="input">
|
||||
<textarea id="text"></textarea>
|
||||
<input type="button" value="add feature" onclick="deserialize();" />
|
||||
<span id="selected"></span>
|
||||
</div>
|
||||
</div>
|
||||
<div id="info">
|
||||
Features
|
||||
<input type="button" value="refresh" onclick="serialize();" /><br />
|
||||
<textarea id="features"></textarea>
|
||||
Intersections
|
||||
<input type="button" value="intersect all" onclick="intersect();" /><br />
|
||||
<textarea id="intersections"></textarea>
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user