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Hello Everybody ,i'm new to Pov Ray engine.
I need to draw powerline wire on a background png image that i've in my pc.
I have tried using sphere_sweep but the result are not really encouraging.
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Op 22/10/2019 om 12:05 schreef ale### [at] gmail com:
> Hello Everybody ,i'm new to Pov Ray engine.
> I need to draw powerline wire on a background png image that i've in my pc.
> I have tried using sphere_sweep but the result are not really encouraging.
>
>
I think you may be helped with one or both attached applications. One is
by Lance Purple, the other by PM 2Ring. They show how to model catenaries.
--
Thomas
Post a reply to this message
Attachments:
Download 'pylon.zip' (10 KB)
Download 'catenary.zip' (6 KB)
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On 10/22/19 7:35 AM, Thomas de Groot wrote:
>
> I think you may be helped with one or both attached applications. One is
> by Lance Purple, the other by PM 2Ring. They show how to model catenaries.
>
Catenary.zip: Nice! Hmm, mixed feelings. I am happy I worked it out
when I had to slice a torus by tangents and arc-cosines, but this would
have saved me *so* much time. :)
--
dik
Rendered 15941836800 of 40928716800 pixels (38%)
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"ale### [at] gmailcom" <ale### [at] gmailcom> wrote:
> Hello Everybody ,i'm new to Pov Ray engine.
> I need to draw powerline wire on a background png image that i've in my pc.
> I have tried using sphere_sweep but the result are not really encouraging.
So, we have no idea WHY the results are not really encouraging - perhaps say
what you're tried, and maybe post the specific code that you're using, and we
can probably offer more detailed assistance.
http://news.povray.org/povray.binaries.images/thread/%3Cweb.574cb010874919d05e7df57c0%40news.povray.org%3E/?ttop=428388
&toff=450
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Op 22/10/2019 om 15:40 schreef Dick Balaska:
> On 10/22/19 7:35 AM, Thomas de Groot wrote:
>
>>
>> I think you may be helped with one or both attached applications. One
>> is by Lance Purple, the other by PM 2Ring. They show how to model
>> catenaries.
>>
>
> Catenary.zip: Nice! Hmm, mixed feelings. I am happy I worked it out
> when I had to slice a torus by tangents and arc-cosines, but this would
> have saved me *so* much time. :)
>
I understand your feelings indeed. Much is covered in dust and needs to
be extracted from the hidden storerooms. ;-)
--
Thomas
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I also came across a catenary application by Rob Antonishen from back in
2002. I can post a zip if anyone is interested.
--
Thomas
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Thomas de Groot <tho### [at] degrootorg> wrote:
> I also came across a catenary application by Rob Antonishen from back in
> 2002. I can post a zip if anyone is interested.
>
> --
> Thomas
Yes,please.
Thank you.
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Op 23/10/2019 om 15:46 schreef ale### [at] gmailcom:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>> I also came across a catenary application by Rob Antonishen from back in
>> 2002. I can post a zip if anyone is interested.
>>
>> --
>> Thomas
>
> Yes,please.
> Thank you.
>
>
OK. I shall put a zip file (together with the two previous ones) in
povray.binaries.utilities, for better later access.
--
Thomas
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Thomas de Groot <tho### [at] degrootorg> wrote:
> Op 22/10/2019 om 12:05 schreef ale### [at] gmailcom:
> > Hello Everybody ,i'm new to Pov Ray engine.
> > I need to draw powerline wire on a background png image that i've in my pc.
> > I have tried using sphere_sweep but the result are not really encouraging.
> >
> >
>
> I think you may be helped with one or both attached applications. One is
> by Lance Purple, the other by PM 2Ring. They show how to model catenaries.
>
> --
> Thomas
In catenary.zip is used torus as connecting elements ,is it possibile to use
other object to make something like a power line wires ? i think cylinder is the
right choice but i don't know who to insert it in che catenary
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"ale### [at] gmailcom" <ale### [at] gmailcom> wrote:
> In catenary.zip is used torus as connecting elements ,is it possibile to use
> other object to make something like a power line wires ? i think cylinder is the
> right choice but i don't know who to insert it in che catenary
Typically one would use a sphere_sweep object, or a series of cylinders
connecting spheres of the same diameter. Try just using spheres to see if you
get a string of spheres that look like the right shape, and then fill in the
spaces with cylinders. The shorter the distance between cylinders, the smoother
your curve will be.
The way I would approach this is by creating a scene with a loop that uses a
variable called Clock as a seed() value for creating the pseudo-random values
used for changing the endpoints of your catenary curve.
Then you can use #for (Clock, 1, 1) to just make a single catenary until you get
all of the rest of the code worked out and looking good, and then you can see
what it's like when you do something like #for (Clock, 1, 10).
If THAT looks good, then you can comment out the loop, and set your seed with
the animation _clock_, and then you will have a different curve for every frame.
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