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# XR7: EarthStrike
# www.xandis.com
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1. tilemaps\ directory

Tilemaps are data files that contain rows and columns
of integer values. These integers represent a reference to
a tile in a bitmap (usually stored in the sprites\ directory).

These files are used in presenting the non-static backgrounds
in levels 2,3,4 and 5. For levels 2-4 the background is just
permanently repeating moving stars so the same tilemap, more or
less, is used. Level 5 though is the Xevious-like level where
the background imagery is that of an actual planet so there is
several minutes of unique scrolling background information.

The game itself has a _very_ simple tilemap editor built into it
and it was that editor that created the large level 5 tilemap.
The cheat key needs to be turned on in order to access the editor.

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