When sending Revit columns to Rhino, it seems that it is sending the “Analytical Column” baseline rather than the BIM baseline? If there are structural walls with analytical model in Revit turned on, Revit automatically shifts the wall and column baselines to line up.
When sending the Revit to Rhino, the column baselines are all offset accordingly, but I thought it should be the BIM element baseline being sent rather than the analytical model baseline? We can fix it by turning off the analytical model for the adjacent walls which is fine for this instance but may not be ok in other cases.
just wanted to write the exact same as the original author of this thread…
I am a bit confused as to why Speckle would send the analytical model (the base line) of a Structural Column if you are not specifically deciding to send the Analytical Column (category)? Is there a reason for this decision?
Usually there shouldn´t be much of a difference, but there might be due to not paying attention or bad modelling practice… I think it should be at least an option to send the BIM base line!
I will build up on this one, as we stumbled upon it too. If one wants to analyze the baselines, for example, to deconstruct geometry or to evaluate those lines, the results would not be right. We have implied on our side too, that the baseline of Speckle is according to the baseline of Revit.
Would be interesting to know the background of it. It would really help us, if it would be the actual Revit baseline.
Sorry for no response as we had to push on with our workaround to meet deadlines etc, but it seems there are many users interested in the topic.
Our specific use case: We are sending the revit model to rhino to build the structural analysis model. The structural model generally does not perfectly match the BIM model / structural layout by necessity of simplification / assumptions etc.
We’d prefer to have control over the rationalisation of the BIM model into a structural model rather than adopting the logic chosen by autodesk in their ‘analytical model’ by being able to send the BIM baseline. It would also benefit parties that wish to send the actual BIM model to grasshopper for other design activities/post-processing/whatever. As mentioned our workaround was to turn off the ‘analytical model’ in Revit to avoid speckle choosing the autodesk-defined structure model from being exported to Rhino
It would be beneficial if Speckle could send both a) the actual BIM baseline of elements or b) the revit analytical model baselines so that users can choose which item they actually need.