Simplify arcs with less control points

Hi,
we use Rhyno 8 for the 3D model flattening and exporting into DWG format. Exported drawing with curved lines creates a lot of dots on the curves. Is there any possibility to export the flattened surfaces, so that when the dwg format is opened, the points on the curves will be as minimal as possible without geometry changes? Hope my issue is clear.

Hi -

It’s not clear if you are exporting surfaces or curves.
If you have curves, you can use the SimplifyCrv command to simplify those.
-wim

This sounds/looks like you are tessellating your curves on export into polylines. Check your DXF settings. Uncheck all of those below… Better?

Hi, we are exporting surfaces

What is your option for exporting surfaces set to?

Mine is the same as in the picture.

OK, that means the surface edges are being exported as curves. In which case my previous post information applies - your free-form edges are most likely being tessellated into polylines, causing all those points you see.

ok, I see if I export curves as spline it reduce the points but I need to have it in polylines and then it doesn’t work.

Well the problem is that free-form curves can only be approximated by polylines to within a certain tolerance (given that polylines are just line segments). If you allow a greater deviation from the original curve, you can have fewer points, but the result may not be accurate enough for you.

You might want to try duplicating the surface edges before exporting, using Convert with the Output=Arcs setting and play with the tolerances to see if your surface edges can be approximated with fewer arc segments instead of dense polylines. Then export the resulting joined arc curves instead of the surfaces directly.