Anyone ever written a Fractal-program for 2600 ?

[Lord-Chaos]

Anyone ever made such a program - just as a demo ?

 

The math behind the standard fractal is very simple (the formula is f(x)=x*x+c) and you´d need only +/- and *.

 

I think it should be possible to use the "colorview" technique to create some sort of "bitmap".

 

The only real problem is that this is not possible with 128 Bytes memory , because the computer/the VCS has to generate the fractal and the data must be saved somewhere.

 

With 128 bytes it would be only possible to create a very small fractal ...

 

But it would be a nice demo ...

 

Thimo

[Thomas Jentzsch]

Anyone ever made such a program - just as a demo ?

Memory is the biggest problem here. I'm sure something is possible, but the results won't be very inspireing. I made something like that for the C64 back in the 80ties using some self-written floating-point multiplications based on square-tables. So the 6502 is not the problem.

 

With 128 bytes it would be only possible to create a very small fractal ...

Very small. If you are using B/W graphics and only 1 bit/pixel you can store max. 1024 pixel. That results in 32x32 pixel. IMO that's not worth it.

 

But maybe by using the SuperCharger you get better results.

[IBP]

Before I knew what fractals were I was investigating just how random the random number generator on the BBC computer was, so I wrote a very small program which drew a short line in one of four randomly chosen directions, North, South, East or West. The next line was drawn from the end point of the first, etc

 

What I found made me think that the numbers wern't really random because I always got a fairly impressive picture on the screen.

 

Looking into it further I found that, actually, then numbers wern't random, but they were near enough (a shallow Normal curve), but that what I was drawing was a sort of fractal. Sort of.

 

Memory would be the only problem on the atari, I don't know how much memeory it takes to store the position of single colur pixel, but I would guess it to be less than to store the product of the fractal equations. Maybe.

[ZylonBane]

What I found made me think that the numbers wern't really random because I always got a fairly impressive picture on the screen.

Someone along these lines that's pretty cool-- Write a program that defines three points on the screen, arranged in a triangle. Now set up an infinite loop that randomly picks one of those points and moves a fourth point halfway towards it. Plot a pixel where it lands. Repeat. Believe it or not the pattern that emerges is not at all random. It's pretty cool to run and watch the pattern form over time.

[+-^CrossBow^-]

isn't that the one I have for my TI-83 programmed that after about 10 mintues of running...finally looks like the Tri-Force pieces from Zelda?! hehehe..