[mkgmap-dev] r3784 produces large img files than r3773

Tue Feb 7 16:44:32 GMT 2017

Hi Ticker,

I'd prefer to get a patch for MultipolygonCutter ;-)
I guess the problems are similar to those in the split algo.
Pseudo-Code for an alternative solution is also welcomed.

FYI: I am implementing an index that allows to quickly find nearby
way segments , I will use that to find intersections in mp-rels
in the same way as I've implemented it with some patches for JOSM.
The index might be useful for my cut algo as well.

Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Dienstag, 7. Februar 2017 14:34:36
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] r3784 produces large img files than r3773

Hi Gerd

orderByDecreasingArea only has a param declaration and single use in
MapSplitter and its value transforms to MapArea.splitPolygonsIntoArea
so I think it is better as it is.

I had some thoughts on a simple/efficient algo for MultiPolygonRelation
hole cutting - It won't produce the optimized cuts that yours is aiming
for. If you are interested, I'll formulate some pseudo-code.

Merge the branch whenever is best for you.

Ticker

On Tue, 2017-02-07 at 13:12 +0000, Gerd Petermann wrote:
> Hi Ticker,
>
> thanks, I am still working a new algos to replace parts of the
> existing code in MultipolygonRelation,
> esp. that for createContainsMatrix(). I hope to finish the first
> patch tomorrow.
> If that takes much longer I plan to merge the branch into trunk
> first.
> Reg. refactoring: What do you think about adding
> orderByDecreasingArea as a (final) field in MapSplitter?
>
> Gerd
>
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> Gesendet: Dienstag, 7. Februar 2017 13:45:25
> An: mkgmap-dev at lists.mkgmap.org.uk
> Betreff: Re: [mkgmap-dev] r3784 produces large img files than r3773
>
> Done
>
> On Tue, 2017-02-07 at 12:17 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> >
> > that's what I expected. Most shapes do not have too many  points
> > after line simplification.
> > If I got that right most of the code in PolygonSplitterFilter is
> > now
> > obsolete. I think it would be
> > better to move the functionality of PolygonSplitIfNeededFilter into
> > it so that the history is kept.
> >
> > Gerd
>
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