Is there any way to constrain extent?

CesiumJS
1

Hello,
I was looking for an option that constrain extent.
I want to limit the view. So the camera can move only in a certain boundary.
Please give me a clue.

2

hello , if your app code is open source please share the github repo or send .zip files on my gmail hrachyaralyan1998@gmail.com

3

There seems to be no specific way to do this, perhaps you can add a camera movement event, get the camera position every time the camera moves, and then compare it to your extent.

4

Sorry…the code cannot be opened to the public for security reasons.

5

Okay, I’ll try.
If there is a sample code you know, please share with me.
Thanks.

6 
var viewer = new Cesium.Viewer('cesiumContainer');
var camera = viewer.camera;

// extent
var minLon = -90;
var maxLon = 90;
var minLat = -45;
var maxLat = 45;

camera.changed.addEventListener(function() {
  var position = camera.positionCartographic;
  var lon = Cesium.Math.toDegrees(position.longitude);
  var lat = Cesium.Math.toDegrees(position.latitude);

  // check extent
  if (lon < minLon || lon > maxLon || lat < minLat || lat > maxLat) {
    // do something ...
  }
});
1 Like
7

Hi there,

This is an ongoing feature request documented in Camera boundry · Issue #4802 · CesiumGS/cesium · GitHub. I’ll add this request to that thread.

Thanks!