susam / fxyt Goto Github PK

If white space (space or newlines) was allowed (and ignored), it would be easier to structure the programs.

On top of that if one could add a comment which would ignore all the text until a new line, one could produce more readable programs.

N0N0XN100>[Y]R

yields a weird error message:

ERROR: (0, 0): 14: ‘R’ found 2 values on stack; needs 2

If we had sqrt (square root) if would be easier to draw circles of given radius.

Hi, I love your language! I'm writing an implementation of it over at https://github.com/mademast/fxyt and I noticed two areas where the spec leaves behaviour undefined: using M to increment the mode more than twice and using F to set different frame intervals for different spatial coordinates. From looking at your reference implementation, it looks like overincrementing the mode is an error, and the only frame interval that matters is the final pixel (all others are ignored). I may have misread, though.

I agree with the first behaviour, but maybe having F set different values based on the grid coordinates should be an error? Otherwise different implementations could behave differently depending on what order they render the image in. Each pixel could also set its own frame interval (could be visually interesting!), but that would significantly increase the complexity of a FXYT interpreter and introduce the issue of synchronization.

It would work to let F set different values based on the T coordinate; that makes intuitive sense to me.

(maybe setting the frame interval to a negative value should also be an error?)

Thanks for making this project! It's been a lot of fun throwing together a simple parser and interpreter for it.

It would be nice to see some more examples - maybe you could make a gallery of them?

This would be my submission - a very low res mandlebrot set plotter. It can only look to depth 7 otherwise it uses more than 1000 iterations.

NNNN7[SDD*N1024/RDD*N1024/R+N4096<[RN1+RR]SDD*N1024/RDD*N1024/R+N4096<![PPN4000N4000]SDD*N1024/RDD*N1024/RS-XN128-N12*N512-+RR*N512/YN128-N12*+]PPN30*

https://susam.net/fxyt.html#NNNN7bSDDpN1024qRDDpN1024qRsN4096lbRN1sRRcSDDpN1024qRDDpN1024qRsN4096libPPN4000N4000cSDDpN1024qRDDpN1024qRSdXN128dN12pN512dsRRpN512qYN128dN12pscPPN30p

That was a fun diversion for a Saturday afternoon - thank you!

I think it would work great if it came with support for polar coordinates, thus making the pictures more "circular".