How to hide an object when the camera is far enough away?

Rhino Developer
1

For example, I want to hide the PointCloud that will only be displayed when it is close enough

2

Hi -
There is no out-of-the-box function in Rhino to automatically hide or show objects based on proximity to the camera.
-wim

3

Is there any low-level API that can be implemented? Or is there a plan to make it happen?

4

Hi @ken_zhang,

You should be able to do this using a custom DisplayConduit.

Something like this perhaps:

protected override void PreDrawObject(DrawObjectEventArgs e)
{
  base.PreDrawObject(e);
  if (null != e && null != e.RhinoObject)
  {
    if (IsObjectTooFarFromCamera(e.RhinoObject))
      e.DrawObject = false;
  }
}

– Dale