POV-Ray : Newsgroups : povray.general : arc length? Server Time: 29 Sep 2020 10:23:08 GMT
 arc length? (Message 1 to 6 of 6)
 From: Thomas de Groot Subject: arc length? Date: 9 Dec 2019 07:39:04 Message: <5dedfa18\$1@news.povray.org>
```Given a circle with known radius, what is the length of the arc segment
formed between two radii with a known angle?

if you understand what I mean; that description feels awkward... :-/

--
Thomas
```
 From: Dick Balaska Subject: Re: arc length? Date: 9 Dec 2019 09:49:47 Message: <5dee18bb\$1@news.povray.org>
```Am 12/9/19 2:39 AM, also sprach Thomas de Groot:
> Given a circle with known radius, what is the length of the arc segment
> formed between two radii with a known angle?
>
> if you understand what I mean; that description feels awkward... :-/
>

Wouldn't it be some fractional part of the circumference?

given degrees angle a=10, angle b=100 radius r=20

length = pi*r*2*(b-a)/360

--
dik
Rendered 46,077,465,600 of 49,882,521,600 pixels (92%)
```
 From: Thomas de Groot Subject: Re: arc length? Date: 9 Dec 2019 10:03:29 Message: <5dee1bf1@news.povray.org>
```Op 09/12/2019 om 10:49 schreef Dick Balaska:
> Am 12/9/19 2:39 AM, also sprach Thomas de Groot:
>> Given a circle with known radius, what is the length of the arc
>> segment formed between two radii with a known angle?
>>
>> if you understand what I mean; that description feels awkward... :-/
>>
>
> Wouldn't it be some fractional part of the circumference?
>
> given degrees angle a=10, angle b=100 radius r=20
>
> length = pi*r*2*(b-a)/360
>
>

I didn't think of that! Thanks!! :-)

--
Thomas
```
 From: Alain Martel Subject: Re: arc length? Date: 10 Dec 2019 00:04:06 Message: <5deee0f6@news.povray.org>
```Le 2019-12-09 Ã  02:39, Thomas de Groot a Ã©critÂ :
> Given a circle with known radius, what is the length of the arc segment
> formed between two radii with a known angle?
>
> if you understand what I mean; that description feels awkward... :-/
>

You only need to convert that angle into radiant, then multiply by the

Just use the builtin macro :

```
 From: Thomas de Groot Subject: Re: arc length? Date: 10 Dec 2019 07:27:19 Message: <5def48d7\$1@news.povray.org>
```Op 10/12/2019 om 01:04 schreef Alain Martel:
> Le 2019-12-09 Ã  02:39, Thomas de Groot a Ã©critÂ :
>> Given a circle with known radius, what is the length of the arc
>> segment formed between two radii with a known angle?
>>
>> if you understand what I mean; that description feels awkward... :-/
>>
>
> You only need to convert that angle into radiant, then multiply by the
>
> Just use the builtin macro :
>
>
>

Initially, I had something like that in the back of my mind but was
unable to move it to the front ;-)

Thanks indeed; I now have /two/ paths to achieve it.

--
Thomas
```
 From: Leroy Subject: Re: arc length? Date: 10 Dec 2019 20:40:03 Message:
```Alain Martel <kua### [at] videotronca> wrote:
> Le 2019-12-09 Ã  02:39, Thomas de Groot a Ã©critÂ :
> > Given a circle with known radius, what is the length of the arc segment
> > formed between two radii with a known angle?
> >
> > if you understand what I mean; that description feels awkward... :-/
> >
>
> You only need to convert that angle into radiant, then multiply by the