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- Brownian, a freely redistributable program by:
- John M. Olsen, 1547 Jamestown Drive, Salt Lake City, UT 84121-2051
-
- Brownian is loosely based on both fractal theory and brownian motion.
-
- A conventional way to use this technique is to start with a flat plane,
- then pick a line on it and raise everything on one side, and lower
- everything on the other side. This is repeated until you have what looks
- like a patch of a fractal mountainside.
-
- These fractals can be tailored to match a specific general design by putting
- constraints on where the lines are to appear. To get a mountain range, you
- just need all the lines to point approximately the same direction.
-
- My approach was tailored to the Amiga by my using triangles instead of
- fault lines. I alternate between raising and lowering the color values
- within a random triangular area, then toss in color cycling just for fun.
- I directly use the blitter to do plane by plane addition to modify the
- color values within the triangle.
-
- The program is run by either selecting the brownian icon, or by typing
- "brownian" at the CLI prompt with no parameters.
-