Historical tileset limitations

[treeswift]

Historical tileset limitations:

• no inlets, narrow straits, "tongues" of desert, i.e. the following sea and desert configurations are forbidden:

  ::::::
  ::..::
  ::..::

  Solution:

• [x] expand water masses with erosion

• no "ship"-shaped mountain or forest configurations, e.g. the following is forbidden:

  AAAA@@
  AAAAAA
  ::AAAA

Solution:

• [x] spread mountains only in principal directions — allow woods to "steal" plain cells (it's impossible to destroy passability by stealing a corner tile)
• [x] -- measure effectiveness here --
• [x] chop through "ship"-like configurations of woods (last resort).

Reshuffle map (uber-last resort). (effort tracked elsewhere — #8 )

[treeswift]

Close when verified.

[treeswift]

• [ ] Correct narrow straits. Close the issue when this is done.