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The Recipe File
The `tiles.dat' file is the recipe file for generating the tiles.
It is a plain-text file, where each line begins with a tile id,
followed by an image specification.
The image specification consists of one or more image layers separated
by the pipe character (|). The layers are drawn in the order specified.
A layer is a file name (excluding the .png extension), optionally followed
by @X,Y,W,H, where X,Y specify the upper-left corner of the rectangle to
draw, and W,H specify the width and height of the rectangle to draw.
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Generating the composite image
To build a new tiles.png file, do the following:
1. Open a command-prompt, and cd to the graphics subdirectory.
2. Compile the helper program by typing the following command:
javac MakeTiles.java
3. Build the new tiles.png file by typing this command:
java MakeTiles tiles.dat tiles.png
(This will create tiles.png in the current directory.
Copying it into the ../resources/ directory and rebuilding
Micropolis using Ant is left as an exercise for the reader.)
