Parametric Modeling can be described as the relationship between different parts of a 3D model. For example, in a Revit building model, everything has a relationship with each other. If you delete a wall in a model, everything that is on the wall such as windows and doors, will also be deleted. This is so there aren’t random building parts floating around in space. I can see how that could be helpful because if the windows just stayed there, they could be forgotten about and could throw off the model. But with parametric modeling, you have to be careful what you delete. Deleting “just a line” will delete the entire wall or floor or whatever that line is a part of.
The article discusses major differences between Revit and CAD. I have never used CAD before but I can understand the differences after reading about it. In CAD, you have to manually make each floorplan, section, elevation, and schedule. Whereas with BIM in Revit, all these drawings are automatically made just by making one model. This can be extremely helpful and time saving. Though I haven’t used CAD, I have used Rhino to do modeling, which the author also discusses. I feel like Rhino may be in between CAD and Revit, as far as intelligence goes. Changing something in the Rhino digital model automatically updates or deletes something in the other drawings. Rhino just isn’t as smart as Revit as far as drafting, since it seems to be more geared towards 3D modeling of objects rather than buildings. Overall, Revit is much more interactive and intelligent and I look forward to becoming proficient in the program.
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