How to only render the entities in camera view?

[Lukey]

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

How to only render the entities in camera view? 

I know cesium does this automatically with a 3D tileset.json, is there a quick way to do this with entities? 

Only show the entities when camera is in view of them?

I've been looking at the cesium occluder but it's a bit confusing as I don't know what an occluder is or looks like, google hasn't helped.

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

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

Optimisation purposes

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

1.48

[Omar Shehata]

The Cesium engine already does something like this, see here:

https://github.com/AnalyticalGraphicsInc/cesium/blob/master/Source/Scene/Scene.js#L1703

Note that it's not as straightforward as it sounds because:

1. There isn't a 1 to 1 correspondence between entities and primitives, since the Entity API is optimized in various ways, sometimes 1 primitive renders multiple entities to reduce draw calls.
2. Cesium uses a multi-frustum system 

Notice how the engine uses the bounding volume to check whether something is visible:

https://github.com/AnalyticalGraphicsInc/cesium/blob/master/Source/Scene/Scene.js#L1695

[Lukey .]

Thank you for the reply :) 

--
You received this message because you are subscribed to the Google Groups "cesium-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cesium-dev+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.