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+--- Thread: partial torus prims (/thread-28522.html)
partial torus prims - Rene Rechthaler - 2024-11-30
Hello, as stated here:
t04i8000-075.dat
we may need an addon for new torus prim variants...
as of now, there are only full or quarter (inside/outside) torus prims.
But sometimes we may need cut tori.
https://en.wikipedia.org/wiki/Toroidal_and_poloidal_coordinates
toroidal is bigringwise (the rotation path), poloidal is smallringwise (the rotated profile)
my suggestion would be a suffix (like the -075)
and the number is the percentage of the full quarter inside/outside torus and the + or - is the direction
(from the inner/outer border or from the center line)
but you are free to discuss
(do we even need this? which way should it be done? 075 or 750? where does +/- start? and more...)
René
RE: partial torus prims - Willy Tschager - 2025-01-31
(2024-11-30, 15:41)Rene Rechthaler Wrote: Hello, as stated here:
t04i8000-075.dat
we may need an addon for new torus prim variants...
as of now, there are only full or quarter (inside/outside) torus prims.
But sometimes we may need cut tori.
https://en.wikipedia.org/wiki/Toroidal_and_poloidal_coordinates
toroidal is bigringwise (the rotation path), poloidal is smallringwise (the rotated profile)
my suggestion would be a suffix (like the -075)
and the number is the percentage of the full quarter inside/outside torus and the + or - is the direction
(from the inner/outer border or from the center line)
but you are free to discuss
(do we even need this? which way should it be done? 075 or 750? where does +/- start? and more...)
René
I'm not against it. We have tndis so why not this. Could you please make some renders as it has been done for:
https://forums.ldraw.org/thread-24731-post-41927.html#pid41927
to get people a clear idea what we are talking about?
w.
RE: partial torus prims - Rene Rechthaler - 2025-01-31
something like this? (screenshot from LDPE edited with paint)
the addition itself:
t08o800 like the existing syntax
the +/- indicates from where to start
the number states how far to go (+100 would be the same as a -100, a full quarter, no suffix needed then)
usage:
could be useful for chamfers or partially prints
if a torus gets cut somewhere
-> could still apply to prim subst