*' LibreCAD has basic support for B-spline and quadratic splines, but many interesting features are still missing. For example, methods for trimming, offsetting, hatching, tangential directions,*etc.'' are required to allow extensive usage of splines in LibreCAD. A rather comprehensive collection of spline mathematics can be found at A Primer on Bézier Curves Examples of spline features to implement:

• Trimming
• Hatching
• Arc length
• Area enclosed within a contour

• C++, math

• A Primer on Bézier Curves