I'm just putting together a set of .inc and .pov files for modelling theatres,
theatre sets and theatre lighting.  I've defined all the lanterns I use myself:

* Fresnels (MinimF, Milano, Patt123, Patt243)
* PC Spot (Acclaim PC)
* Fixed Profiles (Patt23 variants)
* Zoom Profiles (Patt 813, SIL 30, Harmony 22/40, Teatro, ..)
* PAR38 (2 bulb sizes), PAR56 (3), PAR64 (3)

and am working on various LED floods and spots.  Also included are definitions
of all Lee and Rosco gels, with published tristimulus values converted to RGB.
The lanterns are specified in a lighting-designer-friendly way, e.g.

      SL_Patt813(Where, Pointat, Angle, Tightness, Gel)
e.g.
      SL_Patt813(<0,20,-20,0.7>, <0,3,0>, 25, 5, LEE_Deep_Lavender)

(Notes: Angle is in theatre terms (whole angle) not POVray terms (half angle)
and the fourth component of 'Where' is the dimmer level.)

If anyone wants other lanterns included, e-mail me; my main reference is Richard
Pilbrow's "Stage Lighting Design" and manufacturers' web sites.  I can't find
tristimulus values for GAMcolor anywhere!

Cheers

Chris

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Consider submitting your work to http://lib.povray.org/

-- 
                                                          - Warp

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Warp <war### [at] tagpovrayorg> wrote:
> Consider submitting your work to http://lib.povray.org/
>
> -- Warp
>

I'll definitely do that.  I'm very much developing the system rapidly at present
(currently more than a dozen #include files comprising about 120 Kb of text) so
will hold back until it's a bit stable!  Also until I've done a better job on
the .CHM file for the system.

Since posting I've added some macros for scene building, including ones that
allow one flat to be aligned with respect to another, mimicing the way sets are
actually assembled, and a set of macros for the three classical column types
(Doric, Ionic and Corinthian) with the scrolls on the top of the Ionic's being
a rather fun use of sphere_sweep!

Cheers

Chris Osland

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"TheOzule" <chr### [at] chris-oslandorguk> wrote:
> I'm just putting together a set of .inc and .pov files for modelling theatres,
> theatre sets and theatre lighting.

Hi, Chris...

This is definitely of interest to me; I've been doing volunteer lighting design
(and the light-hanging itself) for about four years now, at several
not-for-profit theaters here in Virginia, USA. At one point, I put together the
rudimentary beginnings of my own lighting-design "program" using POV-Ray; useful
in a general way, but it still needs a fair amount of work (particularly in
creating "real world" theater lights with their actual light-output
characteristics; glad to see that you've tackled that. I'm impressed!)

Curious to know how (of if) you're dealing with the color-temperature shifts of
the lights as they are dimmed down. Assuming regular (i.e., non-LED) bulbs. I'm
guessing it's a fairly complex computation.

I'm not familiar with the lighting instruments you mentioned. Where are you
located?

Ken W.

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"Kenneth" <kdw### [at] earthlinknet> wrote:
> "TheOzule" <chr### [at] chris-oslandorguk> wrote:
> > I'm just putting together a set of .inc and .pov files for modelling theatres,
> > theatre sets and theatre lighting.
>
> Hi, Chris...
.... snip
> Curious to know how (of if) you're dealing with the color-temperature shifts of
> the lights as they are dimmed down. Assuming regular (i.e., non-LED) bulbs. I'm
> guessing it's a fairly complex computation.
>
> I'm not familiar with the lighting instruments you mentioned. Where are you
> located?
>
> Ken W.

Hi Ken,

Second question first: I'm in the UK, near Oxford.  Although I do lighting for a
few groups, the one I'm part of (and helped found 20 odd years ago) is
Stagelights - amateur group, about 30 members, productions put on in a
multi-purpose hall with a severe ridge roof (8 feet high at the outside walls,
30 feet high in the middle!).

The lanterns I have are almost all second-hand (apart from LEDs which I haven't
tackled yet): makers are Strand, CCT, Teatro(Coemar) and others.

Re colour-temperature, sorry to disappoint but I haven't tackled it at all (nor
even the non-linear dimmer curve), but specifying the rig would get even more
complicated (and so less likely for anyone to bother) if the designer also had
to feed in different bulb characteristics - which would be necessary for a
thorough job.

My main aim was to get a system that was about equally fair to set design and
lighting design, although now I can import a dimmer setting array from Excel I
must admit that lighting has run a bit ahead of set design!  I think it will be
a system that is useful to me, as set and lighting designer, to check out ideas,
and should be invaluable as a means of communicating with director (and actors)
ahead of them seeing the actual set.

I hope to have a releasable version sometime in the next couple of weeks.

Cheers

Chris

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Hi Chris,

I'm a 3rd year Computer Science student at Swansea University doing a Graphics
module using POV-Ray. One of our assignments is to create a 'realistic
environment' of some kind, and I am interested in modelling a theatre, with
emphasis on lighting.

Are your .inc and .pov libraries available anywhere that I may be able to
download and implement them into my model?

Any advice or comments would be greatly appreciated.

Thanks,
Nathan.

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The thread is rather old so likely he will not see your post
He did however invite email requests so you might try that.

For an indoor theatre scene you probably want to use the screen
as the main light source, you can use radiosity and "emission"
in the finish and/or an area_light for that.

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On 18/10/2012 7:18 PM, Christian Froeschlin wrote:
> For an indoor theatre scene you probably want to use the screen
> as the main light source, you can use radiosity and "emission"
> in the finish and/or an area_light for that.

Screen in a theatre? Are you thinking of a cinema (movie theater, 
Kinosaal)? ;-)

-- 
Regards
     Stephen

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>
> Hi Chris,
>
> I'm a 3rd year Computer Science student at Swansea University doing a Graphics
> module using POV-Ray. One of our assignments is to create a 'realistic
> environment' of some kind, and I am interested in modelling a theatre, with
> emphasis on lighting.
>
> Are your .inc and .pov libraries available anywhere that I may be able to
> download and implement them into my model?
>
> Any advice or comments would be greatly appreciated.
>
> Thanks,
> Nathan.
>
>

Emphasis on lighting mean using fading light. Use fade_power 2 and a 
short fade_distance. Next, increase the light's intensity a LOT. You can 
set a light_source colour in the thousands without any problem. A fading 
light at 100 unit distance need a strenght of 10000 (100^2) to have an 
illumination of 1.
Simply multiply the light intencity by the square of the distance to the 
target surface/object.
Take a look at the lightsys include.

In a theater, you'll need mostly spotlights.

Using some area_light greatly help making things more beleivable. Use 
adaptive to cut down on the rendering time. Use relatively large values 
for the array, something like 9, 17, 33 or even 65 or more.
Use adaptive 0 for a starter. If there are dark areas that should be 
lighted, or bright areas that should be dim, use adaptive 1 or 2 on the 
problem light.

If you feel courageous and have the time, play with radiosity. It adds a 
lot of realism.

If you have reflective or refractive objects, using photons allow the 
light to be reflected or refracted realisticaly.

I encourage you to jump straight to version 3.7 RC6. You'll find it on 



Alain

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Stephen wrote:

> Screen in a theatre? Are you thinking of a cinema (movie theater, 
> Kinosaal)? ;-)

oops, misread that ;)

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