H100 Programs in GWBASIC/BASICA

Some of these programs were developed on the H100 in GWBASIC, then were modified for PC compatible BASICA, and then were re-edited to restore to GWBASIC compatibility. If you find any remaining SCREEN 12 statements (or any other BASICA statements) that are still enabled, they should be REMmed out for H100 use.

Programs

Programs that create graphics or generate graphics files

AUTORAND.BAS

Continuously generates random IFS variables and displays the associated fractal images. A second version of the program runs faster but has fewer features.  A third reads an .IFS file and generates its image.  This page also links to a brief overview of IFS fractal generation and to programs that convert from rectangular coordinates to polar and back.

 

BIFURCAT.BAS

Shows Robert May's logistic map bifurcation diagram, as described in Chaos: Making A New Science, by James Gleick.

 

DLA3.BAS

Simulates diffusion limited aggregation. Particle randomly wanders around the screen. When it collides with boundary, it sticks, creating tree or fern-like structures.

 

HENON.BAS

Produces graphic image of the strange attractor of Henon, regarding chaos.

 

CHAOSGAM.BAS

Uses a random walk to generate areas with fractal boundaries. A second program draws a donut shape.

 

ATTRACT.BAS

Strange attractor? Probably not, but a waveform appears on the screen.

 

NORMAL.BAS

Builds a normal distribution at the bottom of the screen (the dropped marbles also show their trails as they fall), but has the "sticky" routines from DLA, so it makes strange treelike formations at the screen bottom, instead, in a vaguely normal distribution.

 

PARABOLA.BAS

Graphic display of equation instability. The later iterations create a parabola shape.

 

Programs that transform or manipulate graphics files. 

AUDISPIC.BAS

Two programs to display .PIC files that were saved by AUTORAND.BAS or other programs. One displays a single file; the other automatically displays consecutively-numbered .PIC files.

 

Misc. other programs

AUTOHIRE.BAS

Plots points from data files to an on-screen graph in graphics mode, 640 x 225.

 

KOCHMATH.BAS

Does a calculation associated with the Koch curve (snowflake). All it really does it print some lines of numbers, but those numbers show that the fractional dimension of the curve is the limit towards which the increased area goes.

 

Print mailing labels

Two trivial BASIC programs to print mailing labels.