[ft-devel] version 3 of the spline flattening patch

[Graham Asher]

Here is a third and I hope final version of the spline flattening patch, incorporating the latest version of David Bevan's cubic spline flattening routine.

Notes:

1. As with the previous versions, it solves the bug in flattening s-shaped curves (cubic with control points on both sides of the chord).

2. I have incorporated David's latest code as is. However, I have expanded his comments, most importantly (i) by giving the reference to Hain's paper in full rather than as a tinyurl, so as to make it easier to find elsewhere if it is moved or if the tinyurl service is discontinued, and (ii) by incorporating a detailed explanation he provided of the calculation of L.

3. It may be thought advisable to split the patch into two: one for cubics, which is essential because it fixes a bug, and one for conics, which is not essential but gives some speed improvement and simpler code. I leave that up to Werner.


Graham

spline-flattening-3.patch
Description: Text document