I am trying to build the circle inside the triangle.
I obtain very strange results. When asking for a non-rational calculation, what I get seems to fit with what should be ok (see http://geometrie.foretnik.net/files/NURBS-en.swf ), but rational nurbs is not building the circle at all. I hope i haven’t forgotten anything in the definition of the nurbs. Does anyone has a clue?
You will find that openNURBS handles knots differently than your online test application. You might spend a moment reading through this technical article:
Below is how you could create a degree=2 circle using openNURBS in conjunction with the Rhino C++ SDK: