Values: 0: fully transparent, 255: fully opaque.
Note that this doesn't yield the expected color blending just
yet, due to libgd messing it up. (Seemingly, the libgd arc
drawing function draws some pixels repeatedly, resulting in a
more opaque circle than desired)
(empty map blocks are blocks that have no associated block data
in the database (which should probably not happen), or that are
not in the database at all, but that are still queried for some
reason (which is unlikely))
The colors.txt file can now be located:
- in the directory of the world being mapped
- in the user's private minetest directory ($HOME/.minetest)
- in the current directory as a last resort
The location can also be specified using a command-line option
When requesting, for instance, a 75x85 map, the mapper will
now create a 75x85 map, instead of an 80x96 (or even 96x108)
map as it did before.
This new behavior is the default when using one of the options
--centergeometry or --cornergeometry.
In addition, both of these options will no longer shrink the
map, to remove rows or columns of empty blocks at the edges.
Previously, this behavior was enabled with --forcegeometry.
An option --geometrymode has been added as well, to tune
the interpretation of the geometry. It supports 4 flags:
- pixel: the requested geometry is interpreted with pixel
granularity. The map is not enlarged to include
entire map blocks.
- block: the requested geometry is interpreted with block
granularity. The map is enlarged with at most 15
nodes at each of the four edges, so that it
includes entire map blocks only.
- fixed: a map of the requested geometry is created (after
adjustmens for 'block' mode). Empty rows or
columns at the edges are not removed.
- shrink: Empty rows and columns at the map edges are
removed to generate the smallest picture possible.
Lastly, a new geometry syntax has been added, which is more
compatible with known syntax (i.e. X-Windows), and which
allows the offset to be optional. If the offset is omitted,
the picture defaults to be centered around 0,0.
`<width>x<height>[+|-<xoffset>+|-<yoffset>]`
For compatibility, the behavior of the option --geometry
was not changed. If (and only if) used before --geometrymode,
it enables block granularity and shrink.
The old option --forcegeometry is no longer documented,
but still recognised for compatibility.
Color mixing using alpha channel now spans map blocks.
So for instance, water is partly translucent to great depths.
Water (or other translucent material) now also becomes darker
with depth.
This is necessary, because libgd may fail, or print some
unintelligible message when these limits are reached.
Known limitations:
- libgd refuses to create images larger than approx INT_MAX (2^31-1)
pixels (a little over 46300x46300), even on 64-bit systems.
- on a 32-bit system, in practise, the largest size that can be
generated is a little over 24100x24100 pixels.
The colors file is now parsed line by line, which means
that parse failures on one line will not carry over to the next line.
When a line fails to parse, the rest of the file is no longer silently
ignored, but the error is reported, and just the failed line is ignored.
Rogier
Rogier-5
ShadowNinja
Sfan5