I encountered the problem of creation surface from curves where should be some minimum point somewhere there on surface (for example red cross, see attachment). The minimum should be in lower position then minimum points on the curves. Is such a the thing possible? How can I create such a surface, please.
to me it looks like your curves resemble some duplicated trimmed boarder of an existing surface. at least it could be so, to rebuild that from the other direction is not so easy, at least one would have to find the tendency of each surface heading towards the cross.
all of your proposals are right. Great, thank you. Pascal is closest to the proper shape of the surface. Because my homework is create a two surfaces from curves with same minimum point as on the picture in attachment and space between the surfaces is empty instead of minimum point in the middle of the surfaces & minimum and maximum points on the edges of the curves. Well…and my goal have to be to learn how to do it.
I suppose that Pasca created curves with same point (minimum point) and then created simple surfaces from each of the four areas. Am I right?
In case of the second surface could be used same procedure, right?
Correct - two InterpCrv curves through that minimum point, then split at that point as inputs to simple surfaces. Then some MatchSrf, for Tangency, with Average across the seams, then MatchSrf again for Position to the perimeter curves.
That is it what I want to find. But what am I doing wrong (attachment). I created surfaces first time. Then I matched it to position & then I merged it in twice but from this step is not possible to merged it together because of gap between them.
is the problem - see how the singularity is at the junction of the four surfaces - that will not merge nicely. Make that surface have the singularity down at the sharp angle on the outer curves, like so:
I am trying again and again but I really do not know, how to do my isocurves in same shape as on your picture. When I create surface, the isocurves are created automaticly. I have no influence on their shape. I tryed move minimum point a little bit up and I adjusted centre cross curves a little bit straight but no success.