DisplayConduit class and clipping issue

I use OpenGL to generate a model and insert it into the Rhino scene, but the scale is very large (see image1 for an example). I want that when loading the model, it automatically aligns to all types of Top, Front, Right and Perspective (see image2). I reviewed many articles on this subject and I came across this article => (https://developer.rhino3d.com/guides/rhinocommon/display-conduits/) and I was interested in the overridden CalculateBoundingBox of the DisplayConduit class. I wanted to align the object’s Bounding box with the Bounding box of the view, but so far nothing has worked)). I overridden the CalculateBoundingBox method, but it does not give anything. Below is the code I made to test this method. Please tell me if anyone has any ideas on this. This is very important to me. Thank you in advance))

RhinoCommandDebugCommand.cs (3.3 KB)

Hi @leusd100

I don’t understand what you mean by align? Does mean you want to zoom to the extents in each viewport?

– Dale

Sorry, I just recently encountered the Rhino API. Yes you are right. For example, I created a sphere (image1) in the first message, in the end I need to get the result shown on image2 in the first message. I tried to solve this problem by overriding the CalculateBoudingBox method in the DisplayConduit class. I passed the BoundingBox of the sphere to the IncludeBoundingBox () method, but this did not produce the desired result. Thank you in advance))

Hi @leusd100,

In the image, technically, the object isn’t clipped. Portions just fall outside the view-able area.

For an example of zooming a view, see the following sample.


– Dale

Thank you very much, Dale for the example, this is what I need. But I need to apply the ZoomExtents () method for each view (top, front, right and perspectice). I tried to do this through the redefined methods of the DisplayConduit class to refer to each view, but it only works for the current view. I don’t know how to get views collection and use the ZoomExtents () method for everyone.

Best regards, Dmitry

Maybe just loop over all views like so: (I admit, I haven’t tested this)

foreach (var view in e.RhinoDoc.Views)


Thanks a lot))