How do Bounds work in OpenLayers 3?

Question

Does the concept of OpenLayers.Bounds from OpenLayers 2.x still exist in OpenLayers 3? How has it changed, and what is its new name?

Answer 1

UPDATE: OL4: https://openlayers.org/en/latest/apidoc/ol.html#.Extent

It seems that the new word for 'bounds' or 'bounding box' (BBOX) is 'extent'. See:

• http://openlayers.org/en/v3.20.1/apidoc/ol.extent.html
• http://openlayers.org/en/v3.20.1/apidoc/ol.View.html#fitExtent
• http://openlayers.org/en/v3.20.1/apidoc/ol.source.Vector.html#getExtent

One way to find out things at the moment is to run searches in the OL3 repo, for example: https://github.com/openlayers/ol3/search?p=3&q=BBOX&type=Code

Answer 2

Did'nt found any documentation about this feature but Extent seems to work :

var vectorSources = new ol.source.Vector();
var map = new ol.Map({
  target: map_id,
  layers: [
    new ol.layer.Tile({
      source: ol.source.OSM()
    }),
    new ol.layer.Vector({
      source: vectorSources
    })
  ],
  view: new ol.View({
    center: [0, 0],
    zoom: 12
  })
});

var feature1 = new ol.Feature({
  geometry: new ol.geom.Point(coords)
});
vectorSources.addFeature(feature1);
var feature2 = new ol.Feature({
  geometry: new ol.geom.Point(coords)
});
vectorSources.addFeature(feature2);
map.getView().fitExtent(vectorSources.getExtent(), map.getSize());

The method vectorSources.getExtent() can also be replaced by any Extent object, like this :

map.getView().fitExtent([1,43,8,45], map.getSize());

Since OpenLayer 3.9, the method has changed :

map.getView().fit(vectorSources.getExtent(), map.getSize());