Greetings MOI experts : )
Can I please seek your assistance on a 'simple' solids construction matter.
Please see attached file.

Three profiles - top, side and front. The front / cross section profile should be consistent along the length of the object apart from scaling to a point at the front and scaling in line with the curves at the rear. Note that there is a 'slice' at the rear when viewed from the right, so the side and top profile curves don't meet.

I can't boolean this out of a block as the last bool fails. Understandably as the curves on which ever profile is cut last ends up co-planar with an existing flat surface.
I've tried a sweep, but couldn't quite get the result I wanted.

Any advice would be appreciated!

Hi Viewbyte, you can't really use booleans alone to build something like this, you can do it with just 2 profile views like this:





But your intent for the "third profile" looks like you want it to control the cross sectional shape of the result and not just to remove material outside of its boundary. Just using straight extrusion shapes and boolean operations alone won't have that kind of effect.

So yeah you need to use surface construction tools like sweep or network to form your shape, it isn't going to happen just with some automagic single push-button thing.

Probably it would be best to have your initial curve structure a bit more simplified, you've got things like this slanted back end and fillet pieces incorporated into your profile curves already:





Trying to include these details in the initial construction isn't good, you want the initial construction to be a simplified larger uniform shape and then something like the slanted end you cut off from the main body block with a boolean with a line and the rounded pieces are fillets that you apply at the end rather than have in the initial profiles.

So try to simplify it, make sharp corners and uniform shaping to start with and then with the simplified starting block apply cuts and then apply edge rounding.

- Michael

Hi Viewbyte, the closest that you can get to a "do it all in one step" thing would be to have curves arranged as in the attached version and then select them all and run Construct > Network.

But it's not going to be shaped well at the ends because of having too many details like the back planar slant cut and fillets baked into the profile curves instead of having those applied to a uniform starting block shape.

So the main thing is to identify the sort of "underlying block" extended shape before any fillets or cuts have been applied and focus on constructing that to start with.

- Michael

Thanks Michael, all noted.

EDIT: Once I got the network curves sorted at the back - removing that 'slice', network delivered a perfect result. : )