4/20/99: Uses improved QSort
This is an implementation of Ken Clarkson's algorithm. Zip file includes an example script that calls it.
9/15/00
These utilities allow users to convert numbers to binary representations and vice versa to facilitate bit manipulation. Includes an example of toggling file attributes.
9/28/98
Despite what ArcView's online help says, Polygon.ReturnCenter does NOT
return the true centroid. This routine is adapted from O'Rourke,
Computational Geometry in C. Click HERE for an example script that
calls it. For a more comprehensive version that creates a centroid
shapefile from an active polygon theme and supports multipart polygons,
see the EDTOOLS extension, under "Views".
3/15/98
The vertices of an external ring are clockwise; those of an internal
(island) ring are counter-clockwise. In general, it is not necessary to
know in ArcView whether a ring is clockwise or not, because the
Polygon.Make request automatically processes the input rings as needed.
Nonetheless, it may be useful to employ this script as a test of whether
a ring is internal or external. Click HERE for an example script that
calls it.
1/5/99
This bundle of scripts enables the execution of most of Idrisi's
commands through ArcView. Functions include launching Idrisi, setting
the working directory, executing a macro command, and closing Idrisi.
Includes a sample session script. For more information on Idrisi's API
and how to install it, click HERE.
Not compatible with Idrisi32. Click HERE for more
info.
4/20/99: Improved/faster code
An implementation of the quick sort algorithm, QSort can sort a list of
ANY objects for which a comparison routine may be devised. Click
HERE for an example of
sorting the polygons of an FTab. This version is based on the algorithm
at Larry Ogren's
web site: of several tested (including one from Microsoft!), it was
by far the best.
9/15/00
Randomizer.dll implements seven pseudo random number generation
algorithms. Includes source code, example scripts, and an Avenue
implementation of the Mother of All algorithm. For documentation, click
HERE.
10/2/00: Implemented as DLL
This is an adaptation of Seidel's polygon triangulation algorithm.
Includes an example script and icon. Now implemented as a DLL for FAST
run time. Does not work for polygons with redundant vertices (i.e.
whose rings touch).
CLOCKWISE.AVE (1.0K) -- Clockwise Test Script
IDRAV.ZIP (3.3K) -- Idrisi API Scripts
QSORT.AVE (1.6K) -- Object Sort
RANDOMIZER.ZIP (135 K) -- Random Number Generator Library
TRIANG.ZIP (58.8K) -- Polygon Triangulation Extension
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