wok annotate libspiro/description.txt @ rev 22351

umfpack: hide metis-4.0 missing
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Nov 18 16:07:36 2019 +0100 (4 months ago)
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al@17914 1 Spiro is the creation of Raph Levien. It simplifies the drawing of beautiful
al@17914 2 curves.
al@17914 3
al@17914 4 Using bézier splines an artist can easily draw curves with the same slope on
al@17914 5 either side of an on-curve point. Spiros, on the other hand, are based on
al@17914 6 clothoid splines which make it easy to maintain constant curvature as well as
al@17914 7 constant slope. Such curves will simply look nicer.
al@17914 8
al@17914 9 Raph Levien's spiro splines only use on-curve points and so are easier to use
al@17914 10 and more intuitive to the artist.
al@17914 11
al@17914 12 This library will take an array of spiro control points and convert them into
al@17914 13 a series of bézier splines which can then be used in the myriad of ways the
al@17914 14 world has come to use béziers.