Hi eduarcor,
re:
> I thought that would be a way to load a step file, and then for example move the
> location of a hole, without disrupting the geo at all :)
There are some CAD programs that can do that, SpaceClaim is pretty good at that kind of editing. But it's a pretty complex operation, it involves managing trim boundaries and extending and intersecting surfaces. MoI isn't able to do that kind of editing yet, the focus in MoI is more on drawing a new object and not so much on editing imported objects.
It's not just moving a vertex around like in a poly modeler where the poly faces are totally defined just by a list of vertices. In CAD geometry the object structure has the concept of an "underlying surface" that then has trim boundaries on it which then make some areas of the face to be trimmed away. Then it's edges in the trim boundaries that connect together to glue faces to each other. That kind of structure does not lend itself to pulling points around but what it is good at is that when you do a boolean the "underlying surfaces" stay the same and only new trim boundaries are created so the surfaces don't fragment into more and more little triangle bits for every boolean operation. It's why CAD is much better at doing booleans than poly modelers.
- Michael
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