CheatSheetForConvertingto2geom

Cheat Sheet For Converting to 2geom

If you are just starting I suggest you pick a header file and convert just one function at a time. That will give you a feel for the process as you get more comfortable do more at one time.

ItemsThat you Can Switch NR:: for Geom::

NR::Point

NR::Matrix

NR::Rect

NR::Dim2

NR::L2

NR::Y

NR::X

NR::identify

NR::Coord

Things that need small adjustments or Complete replacement

Error looks like	NR Function or Code	2geom Replacement
	NR::scale	Geom::Scale (note the capital letter S)
	NR::translate
	nrrect.extent(NR::X)	geomrect.dimensions()[Geom::X] OR geomRect[X].extent()
	height= r->extent(NR::Y);	height= r->dimensions()[Geom::Y];
	NR::expansion(nrmatrix)	geommatrix.descrim()
desktop.cpp:754: error: 'expand' is not a member of 'Geom'	NR::Rect const viewbox = NR::expand(canvas->getViewbox(), border);	Geom::Rect viewbox = canvas->getViewbox(); viewbox.expandBy(border);
desktop.cpp:162: error: 'class Geom::Matrix' has no member named 'set_identity'	Mymatrix = set_identity (Nrmatrix)	identity(Nrmatrix) OR matrix.setIdentity()
desktop.cpp: In member function 'bool SPDesktop::isWithinViewport(SPItem*) const': desktop.cpp:532: error: conversion from 'boost::optional<NR::Rect>' to non-scalar type 'boost::optional<Geom::D2<Geom::Interval> >' requested	boost::optional<NR::Rect>	boost::optional<Geom::Rect>
desktop.cpp:1004: error: no matching function for call to 'Geom::D2<Geom::Interval>::isEmpty(double)' ./2geom/rect.h:105: note: candidates are: bool Geom::D2<Geom::Interval>::isEmpty() const	if ( !d || d->isEmpty(0.1) ) { return; }	if ( !d || d->width() < 0.1 || d->height() < 0.1 ) { return; }
	NR:: matrix.test_identity()	local.isIdentity()
selection-chemistry.cpp:1424: error: no match for ‘operator[]’ in ‘center[X]’ center is a boost::optional<Geom::Point>		you're missing the *
Geom::Rotate doesn't seem have a operator/ what is the trick for turning division in to multiplication, again	r1/r2	r1 * r2.inverse()
	NR::Rect's can be changed to Geom::Rect But it is better not to do this.	geomrect = to_2geom(nrrect)
	NR::union_bounds()	Geom::unify()