David,

I was mousing around the DOS fractint formula screen and found an interesting listing which appears to have an error.

I don't know enough to be sure but here is what I have noticed:

Formulas <chip>, <hopalong>, <quadruptwo>, & <threeply> are all never init'ed. The information page (F2 with the formula highlighted) states setting z(0)=y(0)=0: with a colon at the end of the line for initialization. All of the above formulas on the <z screen> show a semi-colon at the end of the line. Does this make a difference?

Since I run DOS I don't have all the fancy cut and paste stuff to rewrite and test so I haven't done that yet to find out if there is a difference. Just noticed it when playing around, and thought I'd ask the programers.

It sounds like you are looking at fractal types on the 'T' screen, so that, in both cases, all you are seeing is a description of the algorithm. The actual code that gets executed is not displayed. If you were looking at a 'formula' fractal type ('T', then 'formula'), then there would be a problem. However, these types are orbit types, and cannot currently be implemented using the formula parser. You'll notice if you look at the mandel fractal type, it also has a semicolon after the initializations on the 'Z' screen. It's just a description. Jonathan