SVGImport.wiki
author sheepyluva@gmail.com
Fri, 05 Dec 2014 14:20:18 +0000
changeset 450 2dce97d0a8fd
parent 385 6f4ad8faeaff
child 749 db0eeafa0cdf
permissions -rw-r--r--
updated flakes
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     1
#summary Importing an SVG into Hedgewars
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     2
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     3
= Introduction =
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     4
376
c840baf439ec Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 375
diff changeset
     5
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 second smallest size, 16px wide)
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     6
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     7
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     8
= Details =
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
     9
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    10
Open Inkscape.
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    11
Go to File->Inkscape Preferences and make sure that
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    12
    * SVG Output->Allow relative coordinates is unchecked
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    13
    * Transforms->Store transformation  is set to Optimized
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    14
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    15
Open an SVG. Ideally one of simple line art, without too much use of fill or filters.
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    16
231
b5780c560285 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 230
diff changeset
    17
1) Select all in the image and choose ungroup, then combine all paths in the drawing (select them, then choose Path->Combine). 
334
612048d0890b Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 331
diff changeset
    18
Note. I had some difficulty doing that with some images even after repeated use of ungroup. I ended up just going into the SVG file and deleting all the groups.  This usually happens if there are filters in place. Removing all the g tags but keeping the paths inside the groups in the SVG in a text editor might be faster than cleaning up in Inkscape.
234
88f4f75b381c Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 233
diff changeset
    19
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.  To simulate occluding, you can try combining individual paths first, and using union to combine into larger groups. This takes a bit more work.  If it still doesn't look right, you're going to have to go in and delete nodes, and generally rework the shape to simulate occlusion.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    20
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    21
2) Go to File->Document Properties and specify 4096 for W and 2048 for H.  You may want to then reposition the art to be more centred vertically or horizontally.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    22
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    23
3) Click on the path, and choose dimensions for W and H that would look good in the game (no more than 4096 for W and 2048 for H).  The Lock button may be helpful here.  Generally resize it and reposition it using the document white area as a guide to how it will look on the in-game drawing area, then save and quit.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    24
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    25
4) Open in a text editor and verify there is one path. Change sodipodi:namedview's ID attribute to id="base" - this is to work around a bug in the current stable Inkscape (0.48.3.1) extensions tool which was crashing it.  This is probably fixed in 0.48.4. Note that I haven't tested this workaround. su_v says this is the correct way to do it because apparently id="base" is a reserved name for namedview in sodipodi - which seems like a rather common and collision-likely name.  I had misread him and changed the path's id to base, and that seemed to work fine.  If changing namedview doesn't work, try renaming the path instead.
236
51ce3b455ad7 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 235
diff changeset
    26
Make sure all those groups are removed.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    27
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    28
5) Open the file in Inkscape again, Click on the path again, then go to Extensions->Modify Path->Flatten Beziers and flatten out the curves to your taste. Default of 10 seems fine most of the time, but for small curved objects you might want something like 5.  Keep in mind, the more the approximation, the more points that Hedgewars has to draw, which can be rough on the engine and network communication, then save and quit.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    29
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    30
6) 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.
240
85ea0e6d423d Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 239
diff changeset
    31
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 some Vim commands for that syntax {{{s/\(\d\) \(\d\)/\1 L\2/g}}}  and {{{s/,/ /g}}} and {{{s/\([LM]\)\s*/\1/g}}}
238
d7b867f80284 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 237
diff changeset
    32
334
612048d0890b Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 331
diff changeset
    33
The coordinates should now be rounded for use by the crude script in (10) unless you plan to handle that yourself in some way.  Here is a vim one-liner to do it.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    34
{{{:s/[0-9][0-9.]*/\=float2nr(floor(submatch(0)*1))/g}}}
238
d7b867f80284 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 237
diff changeset
    35
375
b1b18eeea04e Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 374
diff changeset
    36
Also, it is probably a good idea to remove duplicate points.  Here's a regex for that. {{{s/\(L\d\+ \d\+ \)\1/\1/g}}}  - you should run that a couple of times, then {{{s/M\(\d\+ \d\+ \)L\1/M\1/g}}}.  That just cuts down on a bit of redundancy.  If these regexes match anything, you probably should rerun them.
b1b18eeea04e Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 374
diff changeset
    37
Since this page is a mass of hacks, here's one more redundancy reducer, in bash this time.
b1b18eeea04e Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 374
diff changeset
    38
{{{rm dupes.txt;PREVXY=(99999 99999);sed 's/\([LM]\)/\n\1/g' inputfile | while read f;do read -a XY <<< "${f:1}";if [ "${f:0:1}" != "M" ];then if((${XY[0]}-${PREVXY[0]}<3&&${XY[0]}-${PREVXY[0]}>-3&&${XY[1]}-${PREVXY[1]}<3&&${XY[1]}-${PREVXY[1]}>-3));then echo "$f" >> dupes.txt;else echo $f;fi;else echo $f;fi;PREVXY[0]=${XY[0]};PREVXY[1]=${XY[1]};done | xargs > inputfile.dedupe}}}
b1b18eeea04e Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 374
diff changeset
    39
If dupes.txt has anything in it, you probably should run it again.  Anyway, running these reduced a complex test trace from ~8800 points down to ~6500.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    40
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    41
7) Convert the path data.  Here is a crude script to do that.  Note this one uses a line size of 1 (that's the 0x01 business).
363
c6e60247e9d4 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 334
diff changeset
    42
If you want larger lines you can pick anything between 0x00 and 0x3F.  That's 6-636.  See the [DrawnMapFormat] wiki page.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    43
{{{
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    44
#!/usr/bin/perl
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    45
# just a one-line list of points. at least, it had better be one-line
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    46
open FILE, $ARGV[0];
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    47
while(<FILE>)
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    48
{
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    49
    chomp;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    50
    s/([LM])(\d+) (\d+)\s*/point($1,$2,$3)/eg;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    51
    print;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    52
} 
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    53
sub point
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    54
{
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    55
    ($t, $x, $y) = @_;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    56
    $x+=0;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    57
    $y+=0; # just in case
239
91b2ea70aff4 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 238
diff changeset
    58
    printf("%c%c%c%c%c",$x>>8,$x&0xff,$y>>8,$y&0xff,($t=~m/M/)?(0x80|0x01):0x00);
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    59
    return;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    60
}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    61
}}}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    62
{{{script pointdata > hwpointdata}}}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    63
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    64
8) qCompress the data.
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    65
{{{g++ -I /usr/include/qt4 -I /usr/include/qt4/QtCore qcompress.cpp -lQtCore}}}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    66
{{{
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    67
#include <QFile>
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    68
#include <QByteArray>
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    69
using namespace std;
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    70
int main(int argc, char **argv) 
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    71
{
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    72
    QFile fromFile(argv[1]);
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    73
    QFile toFile(argv[2]);
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    74
    if(fromFile.open(QIODevice::ReadOnly) && toFile.open(QIODevice::WriteOnly))
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    75
    {
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    76
        toFile.write(qCompress(fromFile.readAll()));
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    77
    }
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    78
}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    79
}}}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    80
{{{./a.out hwpointdata hwpointdata.Z}}}
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    81
385
6f4ad8faeaff Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 376
diff changeset
    82
9) Convert to base64 and you're done! (whew)
227
c7897b5d10c5 Created wiki page through web user interface.
kyberneticist@gmail.com
parents:
diff changeset
    83
228
13f07e078365 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 227
diff changeset
    84
{{{base64 -w0 hwpointdata.Z > mynewhedgewars.hwmap}}}
13f07e078365 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 227
diff changeset
    85
13f07e078365 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 227
diff changeset
    86
Enjoy.
13f07e078365 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 227
diff changeset
    87
331
8a16017f175f 0.9.18+
kyberneticist@gmail.com
parents: 240
diff changeset
    88
Here are some example hwmap files from the process above.  They look better in 0.9.18+ due to the added size support, allowing thinner lines.
228
13f07e078365 Edited wiki page SVGImport through web user interface.
kyberneticist@gmail.com
parents: 227
diff changeset
    89
http://m8y.org/hw/drawn/