#summary Importing an SVG into Hedgewars

= Introduction =

This is a quick and dirty description of converting an SVG into hedgewars HWMAP format.  It is not at all pretty. Hopefully someone will make a prettier process.  It currently makes use of Inkscape, vim, perl, g++ and a bit of manual labour.  It looks best in 0.9.18 which makes use of the variable brush size (the examples below use the smallest size, or 16px wide)

= Details =

Open Inkscape.

Go to File->Inkscape Preferences and make sure that

    * SVG Output->Allow relative coordinates is unchecked

    * Transforms->Store transformation  is set to Optimized

Open an SVG. Ideally one of simple line art, without too much use of fill or filters.

Also, some paths might be worth eliminating altogether.  In order to get a better idea of what it'll look like, try: View->Display Mode->Outline

8) Save and Quit again

9) Edit the file, and delete everything but the path data.  You should have a one-line file starting with something like  M1234.3 456.78L3298.3 9023.34 and so on.  The coordinates should now be rounded unless you plan to handle that yourself in some way.  Here is a vim one-liner to do it.

{{{:s/[0-9][0-9.]*/\=float2nr(floor(submatch(0)*1))/g}}}

If instead you have a format like M 1234.678,9875.323 2345.0,123.45  - you'll want to convert if you want to try the crude script in (10) - otherwise a smarter script would be needed.  Here's a Vim one-liner for that syntax {{{s/\(\d\) \(\d\)/\1 L\2/g}}}  and {{{s/,/ /g}}}

{{{

#!/usr/bin/perl

# just a one-line list of points. at least, it had better be one-line

open FILE, $ARGV[0];

while(<FILE>)

{

    chomp;

    s/([LM])(\d+) (\d+)\s*/point($1,$2,$3)/eg;

    print;

} 

sub point

{

    ($t, $x, $y) = @_;

    $x+=0;

    $y+=0; # just in case

    return;

}

}}}

{{{script pointdata > hwpointdata}}}

11) qCompress the data.

{{{g++ -I /usr/include/qt4 -I /usr/include/qt4/QtCore qcompress.cpp -lQtCore}}}

{{{

#include <QFile>

#include <QByteArray>

using namespace std;

int main(int argc, char **argv) 

{

    QFile fromFile(argv[1]);

    QFile toFile(argv[2]);

    if(fromFile.open(QIODevice::ReadOnly) && toFile.open(QIODevice::WriteOnly))

    {

        toFile.write(qCompress(fromFile.readAll()));

    }

}

}}}

{{{./a.out hwpointdata hwpointdata.Z}}}

12) Convert to base64 and you're done!

{{{base64 -w0 hwpointdata.Z > mynewhedgewars.hwmap}}}

Enjoy.

Here are some example hwmap files from the process above.  They look better in 0.9.18.

http://m8y.org/hw/drawn/