139 lines
3.1 KiB
JavaScript
139 lines
3.1 KiB
JavaScript
import Feature from '../src/ol/Feature.js';
|
|
import Map from '../src/ol/Map.js';
|
|
import View from '../src/ol/View.js';
|
|
import Point from '../src/ol/geom/Point.js';
|
|
import VectorLayer from '../src/ol/layer/Vector.js';
|
|
import _ol_source_Vector_ from '../src/ol/source/Vector.js';
|
|
import _ol_style_Icon_ from '../src/ol/style/Icon.js';
|
|
import _ol_style_Style_ from '../src/ol/style/Style.js';
|
|
|
|
|
|
var iconInfo = [{
|
|
offset: [0, 0],
|
|
opacity: 1.0,
|
|
rotateWithView: true,
|
|
rotation: 0.0,
|
|
scale: 1.0,
|
|
size: [55, 55]
|
|
}, {
|
|
offset: [110, 86],
|
|
opacity: 0.75,
|
|
rotateWithView: false,
|
|
rotation: Math.PI / 2.0,
|
|
scale: 1.25,
|
|
size: [55, 55]
|
|
}, {
|
|
offset: [55, 0],
|
|
opacity: 0.5,
|
|
rotateWithView: true,
|
|
rotation: Math.PI / 3.0,
|
|
scale: 1.5,
|
|
size: [55, 86]
|
|
}, {
|
|
offset: [212, 0],
|
|
opacity: 1.0,
|
|
rotateWithView: true,
|
|
rotation: 0.0,
|
|
scale: 1.0,
|
|
size: [44, 44]
|
|
}];
|
|
|
|
var i;
|
|
|
|
var iconCount = iconInfo.length;
|
|
var icons = new Array(iconCount);
|
|
for (i = 0; i < iconCount; ++i) {
|
|
var info = iconInfo[i];
|
|
icons[i] = new _ol_style_Icon_({
|
|
offset: info.offset,
|
|
opacity: info.opacity,
|
|
rotateWithView: info.rotateWithView,
|
|
rotation: info.rotation,
|
|
scale: info.scale,
|
|
size: info.size,
|
|
crossOrigin: 'anonymous',
|
|
src: 'data/Butterfly.png'
|
|
});
|
|
}
|
|
|
|
var featureCount = 50000;
|
|
var features = new Array(featureCount);
|
|
var feature, geometry;
|
|
var e = 25000000;
|
|
for (i = 0; i < featureCount; ++i) {
|
|
geometry = new Point(
|
|
[2 * e * Math.random() - e, 2 * e * Math.random() - e]);
|
|
feature = new Feature(geometry);
|
|
feature.setStyle(
|
|
new _ol_style_Style_({
|
|
image: icons[i % (iconCount - 1)]
|
|
})
|
|
);
|
|
features[i] = feature;
|
|
}
|
|
|
|
var vectorSource = new _ol_source_Vector_({
|
|
features: features
|
|
});
|
|
var vector = new VectorLayer({
|
|
source: vectorSource
|
|
});
|
|
|
|
var map = new Map({
|
|
renderer: /** @type {Array<ol.renderer.Type>} */ (['webgl', 'canvas']),
|
|
layers: [vector],
|
|
target: document.getElementById('map'),
|
|
view: new View({
|
|
center: [0, 0],
|
|
zoom: 5
|
|
})
|
|
});
|
|
|
|
var overlayFeatures = [];
|
|
for (i = 0; i < featureCount; i += 30) {
|
|
var clone = features[i].clone();
|
|
clone.setStyle(null);
|
|
overlayFeatures.push(clone);
|
|
}
|
|
|
|
new VectorLayer({
|
|
map: map,
|
|
source: new _ol_source_Vector_({
|
|
features: overlayFeatures
|
|
}),
|
|
style: new _ol_style_Style_({
|
|
image: icons[iconCount - 1]
|
|
})
|
|
});
|
|
|
|
map.on('click', function(evt) {
|
|
var info = document.getElementById('info');
|
|
info.innerHTML =
|
|
'Hold on a second, while I catch those butterflies for you ...';
|
|
|
|
window.setTimeout(function() {
|
|
var features = [];
|
|
map.forEachFeatureAtPixel(evt.pixel, function(feature) {
|
|
features.push(feature);
|
|
return false;
|
|
});
|
|
|
|
if (features.length === 1) {
|
|
info.innerHTML = 'Got one butterfly';
|
|
} else if (features.length > 1) {
|
|
info.innerHTML = 'Got ' + features.length + ' butterflies';
|
|
} else {
|
|
info.innerHTML = 'Couldn\'t catch a single butterfly';
|
|
}
|
|
}, 1);
|
|
});
|
|
|
|
map.on('pointermove', function(evt) {
|
|
if (evt.dragging) {
|
|
return;
|
|
}
|
|
var pixel = map.getEventPixel(evt.originalEvent);
|
|
var hit = map.hasFeatureAtPixel(pixel);
|
|
map.getTarget().style.cursor = hit ? 'pointer' : '';
|
|
});
|