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"stbenge" <myu### [at] hotmail com> schreef in bericht
news:4c3ff1fb@news.povray.org...
> Darren New wrote:
>> stbenge wrote:
>>> method for 3D line/plane intersection,
>>
>> I thought a cheat-sheet kind of thing for this sort of basic geometric
>> equations would be handy. A book that goes into the basics of the
>> geometric math in a way that's easy to look things up, for (say)
>> inside/outside calcs, intersections of various simple shapes, calculating
>> angles in various situations, and so on.
>
> That would be nice. I'm making sure to chronicle certain discoveries for
> future reference. This last problem involved placing an arc of the right
> radius and angle into an Isosceles triangle so that both the end points of
> the arc and points B and C of the triangle would meet. Simple math wasn't
> cutting it, and I ended up sketching out a diagram to find a way to arrive
> at the correct solution.
>
Not sure if this will help you, but have you tried Friedrich Lohmueller's
insert menu add-ons? You can find them (with other goodies) at:
http://www.f-lohmueller.de/pov_tut/pov__eng.htm
Thomas
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Thomas de Groot wrote:
> "stbenge" <myu### [at] hotmailcom> schreef in bericht
> news:4c3ff1fb@news.povray.org...
>> Darren New wrote:
>>> stbenge wrote:
>>>> method for 3D line/plane intersection,
>>> I thought a cheat-sheet kind of thing for this sort of basic geometric
>>> equations would be handy. A book that goes into the basics of the
>>> geometric math in a way that's easy to look things up, for (say)
>>> inside/outside calcs, intersections of various simple shapes, calculating
>>> angles in various situations, and so on.
>> That would be nice. I'm making sure to chronicle certain discoveries for
>> future reference. This last problem involved placing an arc of the right
>> radius and angle into an Isosceles triangle so that both the end points of
>> the arc and points B and C of the triangle would meet. Simple math wasn't
>> cutting it, and I ended up sketching out a diagram to find a way to arrive
>> at the correct solution.
>>
>
> Not sure if this will help you, but have you tried Friedrich Lohmueller's
> insert menu add-ons? You can find them (with other goodies) at:
> http://www.f-lohmueller.de/pov_tut/pov__eng.htm
He's got an analytical geometry section, which is what I'm into now.
Thanks for showing me this :)
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"stbenge" <myu### [at] hotmailcom> schreef in bericht
news:4c40935f$1@news.povray.org...
> He's got an analytical geometry section, which is what I'm into now.
> Thanks for showing me this :)
Glad to be of help. :-)
It was precisely the Analytical Geometry that prompted me to ask.
Thomas
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From: Shay
Subject: Re: rounded_lsweep, an object macro
Date: 5 Aug 2010 10:07:46
Message: <4C5AC653.3000807@n.n>
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On 07/14/2010 10:37 AM, stbenge wrote:
>
> Can you think of a better name than "rounded_lsweep"?
BITD, I called mine, which worked a bit differently than yours,
"cheap_sweep."
Ron Parker had another, which worked differently that either of ours,
called TorSpline. Don't know if Tor is an acronym for some mathematical
concept or a reference to Tor Olav, who's a bit of a "mathematical
concept" himself.
-Shay
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Am 05.08.2010 16:10, schrieb Shay:
> Ron Parker had another, which worked differently that either of ours,
> called TorSpline. Don't know if Tor is an acronym for some mathematical
> concept or a reference to Tor Olav, who's a bit of a "mathematical
> concept" himself.
Short for torus/toroidal, I'd guess.
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"Shay" <n@n.n> schreef in bericht news:4C5AC653.3000807@n.n...
> Ron Parker had another, which worked differently that either of ours,
> called TorSpline. Don't know if Tor is an acronym for some mathematical
> concept or a reference to Tor Olav, who's a bit of a "mathematical
> concept" himself.
"This macro is used to create a smooth spline of toruses connecting
a sequence of points."
// Date: 7/17/1998
// Auth: Ronald L. Parker
Thomas
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Shay wrote:
> On 07/14/2010 10:37 AM, stbenge wrote:
>>
>> Can you think of a better name than "rounded_lsweep"?
>
> BITD, I called mine, which worked a bit differently than yours,
> "cheap_sweep."
>
> Ron Parker had another, which worked differently that either of ours,
> called TorSpline.
My googling skills must be slipping... I could find neither of those
before making my own :(
> Don't know if Tor is an acronym for some mathematical
> concept or a reference to Tor Olav, who's a bit of a "mathematical
> concept" himself.
>
> -Shay
lol
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Thomas de Groot wrote:
> "Shay" <n@n.n> schreef in bericht news:4C5AC653.3000807@n.n...
>> Ron Parker had another, which worked differently that either of ours,
>> called TorSpline. Don't know if Tor is an acronym for some mathematical
>> concept or a reference to Tor Olav, who's a bit of a "mathematical
>> concept" himself.
>
> "This macro is used to create a smooth spline of toruses connecting
> a sequence of points."
> // Date: 7/17/1998
> // Auth: Ronald L. Parker
Hmm, I'll try to find that.
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On 08/06/2010 02:39 AM, clipka wrote:
> Am 05.08.2010 16:10, schrieb Shay:
>
>> Ron Parker had another, which worked differently that either of ours,
>> called TorSpline. Don't know if Tor is an acronym for some mathematical
>> concept or a reference to Tor Olav, who's a bit of a "mathematical
>> concept" himself.
>
> Short for torus/toroidal, I'd guess.
doh! I guess 8 years wasn't long enough for me to figure that one out
for myself. :)
-Shay
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On 08/06/2010 12:43 PM, stbenge wrote:
> Shay wrote:
>> On 07/14/2010 10:37 AM, stbenge wrote:
>>>
>>> Can you think of a better name than "rounded_lsweep"?
>>
>> BITD, I called mine, which worked a bit differently than yours,
>> "cheap_sweep."
>>
>> Ron Parker had another, which worked differently that either of ours,
>> called TorSpline.
>
> My googling skills must be slipping... I could find neither of those
> before making my own :(
>
Neither does exactly what yours does, so you certainly didn't waste your
time.
A lot of the old POV ng stuff doesn't seem to be available online. Tried
to copy and paste the old macros into this message, but ended up with a
mess.
Ron Parker's is included in Hugo's response to my post:
"Cheap Sweep" Mar 27 2002 p.b.images
Mine is:
"Cheap_Sweep.inc" Apr 04 2002 p.b.scene-files
-Shay
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