Working with 2Geom FAQ

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Revision as of 00:45, 31 October 2007 by Mgsloan (talk | contribs) (→‎Questions)
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Introduction

Questions that arise during coding with 2geom are put here. To see other 2geom related questions go to the general lib2geom FAQ.

Questions

How to create a straight line (for types: Path, pwd2, d2pw)?

   Path p;
   p.appendNew<LineSegment>(a, b);
   Piecewise<D2<SBasis> > pwd2 = Piecewise<D2<SBasis> >(D2<SBasis>(Linear(a[X], b[X]), Linear(a[Y], b[Y])));

How to convert from Path to pwd2 to d2pw to path and back?

   D2<Piecewise<SBasis> > y = make_cuts_independant(x);
   x = sectionize(y);

How do I calculate the bounding box of a path?

   Rect r = path.boundsFast(); 

or

   Rect r = path.boundsExact();

How do I convert 2geom to svgd and back?

inkscape has code for this somewhere :p (Johan knows this)

What does "compose" do?

(i keep forgetting)