Minetestmapper rewritten into C++

[mireq]

Removed hardcoded size of image and added --geometry x:y+w+h option. New sources and binary are on github (https://github.com/mireq/minetest-mapper-cpp).

[LazyJ]

Ok, some more kitchen-testing with the latest version from Github (as of 2012_11_27 morning), Minetest v 0.4.3 and Ubuntu 12.04, 4gig ram

I played around with the "--geometry" option and here are some of the results:

--geometry -30000:-30000+100+100
Result: "Segmentation fault (core dumped)". Yes, there are some buildings out at -30,000x,-30,000y.

--geometry -20000:-20000+100+100
Result: About 15 to 20 minutes to produce a 33 byte (yup, 3-3-b-y-t-e) file that wouldn't load into Eye-of-Gnome (eog) nor GIMP.

--geometry -2000:-2000+4000+4000
Result: A 6.7mb file covering a 4000 x 4000 area starting in the lower left corner at -2000x, -2000y

--geometry -10000:-10000+20000+20000
Results: A 20.2mb file covering a 20,000 x 20,000 area staring in the lower left corner at -10,000x, -10,000y

I've noticed that the minetestmapper's "y" is different than Minetest's coordinates "y". In Minetest, the "y" is the vertical (heaven to hell, up and down) where in the minetestmapper, the "y" is the north and south, forward and reverse (like they taught me in geometry class).

The file size seems quite large for a flat, 2D map. I see that each node is already reduced to 1 pixel each. If rendering the full 60,000x60,000 map becomes possible, what other options could be exercised to reduce the file size? Greyscale instead of RGB? Lower resolution? Output format *.jpg instead of *.png? What about splitting the image into sections that could later be knitted together in a photo editor?

I hope this information is usefull in the further develpment of this nifty program.

[VanessaE]

Program bugs and memory usage aside, about all you can to do shrink the file size further without losing important information is to use 8-bit color instead of 24-bit, assuming it doesn't already do that, use fewer color transitions (e.g. lose the shadows that give hills and tall objects some definition), don't save any metadata, and use maximum PNG compression on the file. You could also try cutting out all parts of the map that haven't been built on, fill those areas with solid white similar to how unexplored regions are drawn. That'll cut the size down some. Large swaths of solid colors compress better than regular map details.

You could indeed try converting such a map to JPG, which will probably cut the file size considerably, but it'll likely suffer horrible quality loss even at high quality settings.

You could also try scaling the map down 2:1 or maybe 3:1, but of course that will result in blurred details.

The best solution is probably to only export the portions of the map that have been built up, and stitch them together on a web page with thumbnails to make a clickable, zoomable map similar to the one ruberwardy maintains for redcrab's server.

Some of this has already been tried as you already know, and the results weren't necessarily all that great.

[Iqualfragile]

is ruberwardys script avivable to the public?

and try using optipng, it can reduce the filesize to one third

[davidpace]

I dunno.........

is ruberwardys script avivable to the public?

and try using optipng, it can reduce the filesize to one third

[VanessaE]

One thing I've noticed with this mapper is that it leaves lots of big holes all over my map image. By holes, I don't mean white spots, but rather little circular or square stone depressions in the land all over the place. Each of those spots has nodes that the mapper isn't familiar with, such as a conifer tree from cisoun's Conifers mod, white fencing from my Colored Woods mod, lighting blocks from my Home Decor mod, or most of the plants in my Plantlife modpack. One would assume nodes without a colors.txt entry would just be treated as air... :-)

Python version, as of minetest git commit 40dac4cd[...]:


C++ version, as of mapper commit 7d15dbf4[...]:


Don't mind the difference in colors, I've got an expanded colors.txt that I use with the python mapper.

[Casimir]

Can someone make a tutorial on how to use this?
Please.

[VanessaE]

I was playing around with this again today and also noticed that it does not load the entire colors.txt file - many entries therein are skipped. Maybe it's due to the sheer number of entries are in mine, I dunno. This colors.txt is what I use with the python mapper.

[jojoa1997]

I was wondering if someone could make a version that i don't have to compile. Like a build or pre compiled version.

[PilzAdam]

I was wondering if someone could make a version that i don't have to compile. Like a build or pre compiled version.

You have to tell us wich OS you are using.

[jojoa1997]

Windows 7

[Casimir]

Windows 7

Me too. Please?

[Jordach]

Windows 7

Me too. Please?

Already is: https://github.com/mireq/minetest-mapper-cpp/downloads

Usage:

http://forum.minetest.net/viewtopic.php ... 321#p40321

[RAPHAEL]

The map generates but am curious as to why it says this:

Code: Select all

Unknown nodes:
christmas:ligs
conifers:leaves
conifers:leaves_special
conifers:sapling
conifers:trunk
darkage:chalk
darkage:desert_stone_with_iron
darkage:mud
...
wool:black
wool:grey
wool:white
workbench:4x4

Edited by sfan5: Maybe use Pastebin for that?

[VanessaE]

Download and copy this colors.txt file in place of the default one. It supports many different mods:

http://digitalaudioconcepts.com/vanessa ... colors.txt

Those nodes that are unrecognized just means that the mapper is supposed to ignore them (this doesn't work properly in the C++ mapper).

[Jordach]

The map generates but am curious as to why it says this:

Code: Select all

Unknown nodes:
christmas:ligs
conifers:leaves
conifers:leaves_special
conifers:sapling
conifers:trunk
darkage:chalk
darkage:desert_stone_with_iron
darkage:mud
...
wool:black
wool:grey
wool:white
workbench:4x4

Edited by sfan5: Maybe use Pastebin for that?

It probably tells you what nodes it does not recognise.

[RAPHAEL]

Download and copy this colors.txt file in place of the default one. It supports many different mods:

http://digitalaudioconcepts.com/vanessa ... colors.txt

Those nodes that are unrecognized just means that the mapper is supposed to ignore them (this doesn't work properly in the C++ mapper).

Thank you VanessaE.. here is my contribution to it (for now)

snow:snow 255 255 255
snow:snow_block 255 255 255
snow:ice 116 187 251
snow:dirt_with_snow 255 255 255

traps:cage 107 134 51

jail:jailwall 108 123 139

industrial:cement 108 123 139
industrial:asphalt 0 0 0
industrial:white_brick 255 255 255

stairs:slab_asphalt 0 0 0
stairs:slab_cement 108 123 139
stairs:stair_cement 108 123 139
stairs:stair_asphalt 0 0 0

lightsplus:light_on 255 255 255
lightsplus:slab_light 255 255 255
lightsplus:slab_light_on 255 255 255
lightsplus:slab_light_wall 255 255 255
lightsplus:slab_light_wall_on 255 255 255

maptools:glass 183 183 222
maptools:stone 128 128 128

more_fences:fence_cobble 123 123 123
more_fences:fence_iron 108 123 139
more_fences:fence_stone 128 128 128

various:lawngrass 107 134 51

scaffolding:scaffolding 104 78 42

EDIT: updated colors

[VanessaE]

Thanks, Raphael. I've added your edited settings and updated the downloadable file.

[Casimir]

Windows 7

Me too. Please?

Already is: https://github.com/mireq/minetest-mapper-cpp/downloads

Usage:

http://forum.minetest.net/viewtopic.php ... 321#p40321

It works! I love it!

[jojoa1997]

Can anyone make a windows build for it?

[Casimir]

See one post above.

[jojoa1997]

See one post above.

I mean a pre-compiled version

[Casimir]

It is.
Download the file, download the colors.txt. Put both into the same folder. Press shift and rightclick into that folder (not on the files). Click "Open command window here" (or something similar). Then you type the line you see in the post linked by Jordach. That should work.
When you get an error make sure you have the right path, and try it with and without the \ at the end.

[VanessaE]

New revision to my colors.txt today to accommodate the latest moreblocks+stairsplus as well as adding a bunch of blocks on my server that weren't being covered before.

Get it from the same download location as mentioned above.

[LazyJ]

Thanks, Vanessa!