Am 01.09.2015 um 13:25 schrieb Norbert Kern:
> Hi,
> here is minimal code for the famous burning ship fractal.
> It renders fine as long as I don't include functions.inc (in another context I
> need functions.inc).
> Does anybody know the reason?

Yes: POV-Ray doesn't officially support recursive functions.

It works in /some/ cases, but has some quite severe limitations; my
personal recommendation would be to create one function for each level
of recursion; that shouldn't be too difficult using a #for loop and the
Parse_String() macro from strings.inc.

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scott <sco### [at] scottcom> wrote:
> >> declaring *any* function before your IterFn causes the crash.
> >

> >
> > Thanks very much
>
> You can get around the problem by unrolling the iteration into 300
> different functions in an array:

Wouldn't it use less memory to have only two functions that you #declare and
#undef within the loop?
http://news.povray.org/povray.binaries.scene-files/thread/%3C4ddda4d9%40news.povray.org%3E/

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"Samuel Benge" <stb### [at] hotmailcom> wrote:
> scott <sco### [at] scottcom> wrote:
> > You can get around the problem by unrolling the iteration into 300
> > different functions in an array:
>
> Wouldn't it use less memory to have only two functions that you #declare and
> #undef within the loop?

Nevermind, I'm pretty sure using only two doesn't save memory :/

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Am 02.09.2015 um 18:06 schrieb Samuel Benge:
> "Samuel Benge" <stb### [at] hotmailcom> wrote:
>> scott <sco### [at] scottcom> wrote:
>>> You can get around the problem by unrolling the iteration into 300
>>> different functions in an array:
>>
>> Wouldn't it use less memory to have only two functions that you #declare and
>> #undef within the loop?
> 
> Nevermind, I'm pretty sure using only two doesn't save memory :/

... and you're pretty right ;)

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