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.

Items That you Can Switch NR:: for Geom::

• 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	Geom::Translate (capital)
	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; }	<nowiki> if ( !d || d->width() < 0.1 || d->height() < 0.1) { return; }
display/nr-arena-item.cpp:734: error: ‘const class Geom::Matrix’ has no member named ‘test_identity’	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()
sp-item.cpp:814: error: ‘expansionX’ is not a member of ‘Geom’	dy0 *= NR::expansionY(i2d); dx0 *= NR::expansionX(i2d);	dy0 *= i2d.expansionY(); dx0 *= i2d.expansionX();
sp-item.cpp:1447: error: ‘const class Geom::Matrix’ has no member named ‘is_translation’	!(!transform.is_translation() && SP_OBJECT_STYLE(item) && SP_OBJECT_STYLE(item)->getFilter())	!(!transform.isTranslation() && SP_OBJECT_STYLE(item) && SP_OBJECT_STYLE(item)->getFilter())
text-context.cpp:1610: error: no matching function for call to ‘to_2geom(boost::optional<Geom::D2<Geom::Interval> >)’	boost::optional<Geom::Rect> frame_bbox = to_2geom(sp_item_bbox_desktop(frame));	boost::optional<Geom::Rect> frame_bbox = sp_item_bbox_desktop(frame);