Op 16/02/2024 om 17:54 schreef kurtz le pirate:
> On 09/02/2024 08:20, Thomas de Groot wrote:
> 
>> Before I go further in reading: This is a very welcome exercise you have
>> started here, Bill! I am a very regular user of the macro and I confess
>> that I have had a lot of misunderstandings about its working in the past.
> 
> bonjour,
> 
> 
> Following your comment, I made this page about rotations in 3d space.
> Could this kind of literature be useful for POV user or no one is
> interested or even be annoying ?
> 
> 
> <http://louisbel.free.fr/scenes/scene036.shtml>
> It's on my website and in English ;)
> 

Note: Contrary To Bald Eagle, the animations played correctly on my 
system (Win11) not black.

I think these kind of simple and clear visual explanations can be very 
useful, certainly for starting (POV-Ray) modellers, but also for old 
hands who have temporarily lost their way in confusion and need a little 
reminder. :-) I am certainly one of those from time to time.

I would suggest that you label the x-, y-, z-axis in the first 
animation, and/or add the usual red, green, and blue colours to them.

Well done and keep on!

-- 
Thomas

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