Hello what would the process be to place the curves I have drawn so they lay directly onto the contours of the surface, this a pattern made with curves and a contoured surface I drew the curves above the surface but want the curves to run along the top contours of the surface, I hope that makes sense, the surface is a piece of wood we have cncd the curves are some pattern lines that we will vcarve onto the wood any help would be appreciated cheers Jimi
Project or Pull the curves onto the surfaces.
Project moves the curves in a fixed direction, which can selected when the command is executed until they intersect (or miss) the surface…
Pull moves each point on the curve in the direction perpendicular to the surface which is effectively the closest point on the surface
Another alternative is FlowAlongSrf which requires a base surface that the curves initially lie on.
not having much luck David could you have a look at my file please
flow on surface.3dm (489.0 KB)
hi David thankyou o my 3rd attempt it worked with pull
one prob missing an outside line - 
each shape needs to be enclosed
you have to rebuild the target surface. you could duplicate the boundary of it then use RebuildCrvNonUniform on each side with 0.01 tolerance which should be within whatever you might need it for with max 20 points then Sweep2 or EdgeSrf, then FlowAlongSrf. the resulting curves lay exactly on the new surface.
Thankyou I’ll try that