Crash when attenuation is enabled for point clouds

[laurenfrederick]

What happened?

Forum Post: https://community.cesium.com/t/camera-main-access-at-cesiumforpointcloudrenderer/46110
Category: Cesium for Unity
Reported by: @MYavuzSelim

Description

Issue 1 in the forum post

Cesium crashes when we enable attenuation for point clouds.

This seems to be about Camera.main access here.

Camera.main is null for us. We use CesiumCameraManager.additionalCameras functionality to define the camera to be used by Cesium.

As a quick test, I used the following function for camera access, and it seems to work:

private Camera GetCamera()
{
    CesiumCameraManager camManager = GetComponentInParent<CesiumCameraManager>();
    if (camManager == null || camManager.useMainCamera)
        return Camera.main;
    return camManager.additionalCameras[0];
}

Environment

Cesium for Unity version:
Unity Editor Version:
Operating System:

Reproduction steps

...

Supporting evidence

No response

[laurenfrederick]

Related to #687 and #688