Re: [Lib2geom-devel] Path translations

[Johan E. <jbc...@sw...>]

On 13-11-2013 17:57, Krzysztof Kosiński wrote:
> 2013/11/13 Johan Engelen <jbc...@sw...>:
>> This is not possible. Because curves are not closed under Affine transform,
>> there is no operator*=(Affine). If you want to transform a Curve, you have
>> to call
>>      Curve* Curve::transformed(Affine const&)
>>
>> I'll clean up the work and commit my changes, so you can see.
> Oops, I forgot about HLineSegment / VLineSegment.
>
> I wonder whether keeping these as separate classes is worth breaking
> the assumption that curves are closed under arbitrary affines, not
> only translation and scaling.

Wow, I didn't realize that it's only the HL and VL curve types.
Not being able to transform Curves without creating a new copy is a very 
high price to pay for HL and VL...

What shall we do?
I thought Inkscape wants HLineSegment / VLineSegment to be able to fully 
round-trip SVG-d, but when I manually enter H or V in the XML-editor, it 
is immediately converted to normal line segments...

regards,
   Johan