DXF POLYLINE SPLINE-FIT

I'm writing a routine to convert dxf entity to another format. Are the spline B-Spline? If Yes then in a polyline with a spline-fit i've got
a list of vertex with flag set to 8 or 16. What are the control points? And the knots vector?
Thanks in advance Paolo
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.