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map documentation refinement

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Add minor detail to recently added map description in doc/window.txt:
origin is in upper left and positive y goes downward, so not typical
Cartesian x,y coordinate plane.
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2022-10-23 15:31:12 -07:00
parent b40ef88e1e
commit 027cf3bf4d
1 changed files with 3 additions and 2 deletions
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doc/window.txt
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@@ -58,8 +58,9 @@ files are all formatted accordingly.
NHW_MAP is a persistent window which uses tty-style character cell NHW_MAP is a persistent window which uses tty-style character cell
column and row as x,y coordinates (even for tiled map). The y or row column and row as x,y coordinates (even for tiled map). The y or row
coordinate runs from 0 through ROWNO-1 inclusive. The x or column coordinate runs from 0 through ROWNO-1 inclusive, with 0 at the top
coordinate runs from _1_ through COLNO-1; column 0 is used by the core and +(ROWNO-1) at the bottom. The x or column coordinate runs from
_1_ through COLNO-1, left to right. Column 0 is used by the core
for internal bookkeeping and not drawn on the screen. Most levels for internal bookkeeping and not drawn on the screen. Most levels
leave some rows and/or columns unused but the core still passes data leave some rows and/or columns unused but the core still passes data
(typically 'unexplored' or 'solid stone') for them and those should (typically 'unexplored' or 'solid stone') for them and those should