Increase Terrain Cache?

CesiumJS
1

1. A concise explanation of the problem you’re experiencing.

When rotating the camera around in the same location, with Cesium World Terrain activated, Cesium seems to re-load everything within view, instead of caching it on memory. Given it takes a few seconds to load the terrain, this significantly affects usability, as merely rotating the camera requires the user to wait a few seconds for the terrain to load.

Is there a way to increase the memory cache size, such that the local terrain does not have to be re-loaded as the camera is rotated?

2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.

Rotate camera around with mouse, notice that terrain is continuously re-loaded.

LINK

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

I want the user to have a smooth experience viewing the terrain (viewing a single location of the terrain, but turning the camera around); if it needs to be re-loaded as the camera turns around, this will significantly degrade user experience.

4. The Cesium version you’re using, your operating system and browser.

Latest Cesium, Chrome browser, Chromebook.

Thanks!

2

You can indeed control this! The easiest way is just to bump up the tileCacheSize (see https://cesium.com/docs/cesiumjs-ref-doc/Globe.html?classFilter=globe#tileCacheSize).

For your specific situation I think setting preloadSiblings to true would help a lot:

https://cesium.com/docs/cesiumjs-ref-doc/Globe.html?classFilter=globe#preloadSiblings

There’s also preloadAncestors which is on by default:

https://cesium.com/docs/cesiumjs-ref-doc/Globe.html?classFilter=globe#preloadAncestors

3

This worked, thank you very much sir!!

4

Glad to hear that!!

What kind of project are you working on?