6 - Photon-Mapping

Hallo Lars,

Thanks a lot for your reply, but unfortunately i was not able to work on
it. my administrator (who does the instlalation for us told me that it
might not work on Radiance version 4.2a; is it true? if yes which version
of radiance i should work with?

thanks a lot again!

- Nassif

···

On Mon, Oct 8, 2012 at 1:05 PM, < radiance-general-request@radiance-online.org> wrote:

Send Radiance-general mailing list submissions to
        radiance-general@radiance-online.org

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or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Radiance-general digest..."

Today's Topics:

   1. weather data in radiance (shailan zareiy)
   2. Monte Carlo sampling setting (Iebele)
   3. Re: Monte Carlo sampling setting (Greg Ward)
   4. Re: weather data in radiance (Greg Ward)
   5. Re: weather data in radiance (Lars O. Grobe)
   6. photomapping example (nassif nassif)
   7. Re: photomapping example (Lars O. Grobe)
   8. Re: weather data in radiance (shailan zareiy)

----------------------------------------------------------------------

Message: 1
Date: Sun, 7 Oct 2012 23:48:08 +0330
From: shailan zareiy <sh.zareiy@gmail.com>
To: radiance-general@radiance-online.org
Subject: [Radiance-general] weather data in radiance
Message-ID:
        <CABNGNZJpYU6r+=
8OLKkEvrsVPGLxtdxWH7xQbPj7oU5ganX0Jw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

dear all
hi,i have a question about the weather data in radiance simulation. i want
to know which items of weather data is used in a daylight simulation by the
radiance software.
thanks for your help
Sincerely
Shailan Zareiy
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Message: 2
Date: Sun, 7 Oct 2012 23:57:38 +0300
From: Iebele <iabel@iebele.nl>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: [Radiance-general] Monte Carlo sampling setting
Message-ID: <DF1DA428-C7A0-40B8-8924-B92B62411DDB@iebele.nl>
Content-Type: text/plain; charset=windows-1252

Hi Greg,

I need a test with true Monte Carlo sampling (in the contrary as many
earlier requests, I need as much variance in different runs of rpiece as
possible).
I assume rpiece takes the same default values as rpict (?)

"rpict -defaults" gives:

-u- # correlated quasi-Monte Carlo sampling

It is not clear to me how to set true Monte Carlo sampling on.

-u+ ?

Cheers,

- iebele

------------------------------

Message: 3
Date: Sun, 7 Oct 2012 14:42:20 -0700
From: Greg Ward <gregoryjward@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] Monte Carlo sampling setting
Message-ID: <BCF5B7A0-C3AC-413B-BAFB-86B0FDC651A1@lmi.net>
Content-Type: text/plain; charset=us-ascii

Yes and yes. You can use the -u+ option in rpiece, along with all the
other rpict options. I recommend setting "-ps 1" as well for pure MC.

-Greg

> From: Iebele <iabel@iebele.nl>
> Date: October 7, 2012 1:57:38 PM PDT
>
> Hi Greg,
>
> I need a test with true Monte Carlo sampling (in the contrary as many
earlier requests, I need as much variance in different runs of rpiece as
possible).
> I assume rpiece takes the same default values as rpict (?)
>
> "rpict -defaults" gives:
>
> -u- # correlated quasi-Monte Carlo sampling
>
> It is not clear to me how to set true Monte Carlo sampling on.
>
> -u+ ?
>
> Cheers,
>
> - iebele

------------------------------

Message: 4
Date: Sun, 7 Oct 2012 14:44:20 -0700
From: Greg Ward <gregoryjward@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID: <76D314B2-66B7-442A-A52F-ED940AB8E982@lmi.net>
Content-Type: text/plain; charset="us-ascii"

Radiance doesn't take weather data directly. The gensky and gendaylit
programs in Radiance can use some information from weather tapes to adjust
their sky models, but there aren't any built-in utilities to handle weather
tapes.

Daysim does have such utilities, and we are hoping to add some facilities
in the next year or so.

-Greg

> From: shailan zareiy <sh.zareiy@gmail.com>
> Date: October 7, 2012 1:18:08 PM PDT
>
> dear all
> hi,i have a question about the weather data in radiance simulation. i
want to know which items of weather data is used in a daylight simulation
by the radiance software.
> thanks for your help
> Sincerely
> Shailan Zareiy
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------------------------------

Message: 5
Date: Mon, 08 Oct 2012 11:32:17 +0200
From: "Lars O. Grobe" <grobe@gmx.net>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID: <50729DA1.2030803@gmx.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

just one hint - if you need to process weather data, tr (to replace
separators) and awk (to select and reformat fields of records) will be
helpful to load the relevant fields into gendaylit. Both are standard
tools in any Unix-like system, includig Mac OS X and Linux.

Cheers, Lars.

------------------------------

Message: 6
Date: Mon, 8 Oct 2012 12:22:03 +0200
From: nassif nassif <nynassif@gmail.com>
To: radiance-general@radiance-online.org
Subject: [Radiance-general] photomapping example
Message-ID:
        <CAOQvQd=
Xv2i14tda4O6AYNbQ7h5ZUEd5WjkQr_u0mdPVde_OHw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

hallo people,

I am planning to simulate a simple geometry using photomapping.

Is there any simple script of how photo-mapping works? my aim is to check
the output for different material (glass, prism, trans...) feeded with a
narrow beam Fixture which results different outputs.

thanks in advance!

--
*N.Nassif

Lighting Designer***
*PLDA Member

Neue Str. 55
21073, Hamburg
Deutschland

+49 162 6050060
nynassif@gmail.com*
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------------------------------

Message: 7
Date: Mon, 08 Oct 2012 12:43:47 +0200
From: "Lars O. Grobe" <grobe@gmx.net>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] photomapping example
Message-ID: <5072AE63.2030702@gmx.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Nassif!
> I am planning to simulate a simple geometry using photomapping.
>
> Is there any simple script of how photo-mapping works? my aim is to
> check the output for different material (glass, prism, trans...)
> feeded with a narrow beam Fixture which results different outputs.
Start with Roland's documentation of the pmap extension for Radiance. It
explains most. Especially look for the supported / unsupported
primitives. Than, vary the number of photon in the distribution pass
(try up to 2,000,000 photons) and the bandwith in the photon gather
pass. Basically, pmap is not too different from using Radiance, you just
create the photon maps with mkpmap first and use them instead of the
ambient calculation in rpcit / rtrace. Don't forget to manually delete
the photon maps, they are not overwritten by mkpmap (adding a --force /
-f option for overwriting would be a useful add-on...).

I showed some examples at a presentation two years ago:

http://www.radiance-online.org/community/workshops/2010-freiburg/PDF/PmapAppsPresentation-20100922.pdf

There are several presentations on the pmap around for the recent
workshops, all available at radiance-online.org.

Cheers, Lars.

------------------------------

Message: 8
Date: Mon, 8 Oct 2012 14:35:05 +0330
From: shailan zareiy <sh.zareiy@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID:
        <CABNGNZLR2ijk_iLmzJjOHLoWG2=
8ipuzfv7HxXuvYiwBWbF+Uw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

so you mean that radiance extracts the sky conditions such as sky clearness
from the weather data not just altitude and longitude of the city?

On Mon, Oct 8, 2012 at 1:14 AM, Greg Ward <gregoryjward@gmail.com> wrote:

> Radiance doesn't take weather data directly. The gensky and gendaylit
> programs in Radiance can use some information from weather tapes to
adjust
> their sky models, but there aren't any built-in utilities to handle
weather
> tapes.
>
> Daysim does have such utilities, and we are hoping to add some facilities
> in the next year or so.
>
> -Greg
>
> *From: *shailan zareiy <sh.zareiy@gmail.com>
>
> *Date: *October 7, 2012 1:18:08 PM PDT
>
> *
> *
>
> dear all
> hi,i have a question about the weather data in radiance simulation. i
want
> to know which items of weather data is used in a daylight simulation by
the
> radiance software.
> thanks for your help
> Sincerely
> Shailan Zareiy
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general@radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
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------------------------------

_______________________________________________
Radiance-general mailing list
Radiance-general@radiance-online.org
http://www.radiance-online.org/mailman/listinfo/radiance-general

End of Radiance-general Digest, Vol 104, Issue 6
************************************************

--
*N.Nassif

Lighting Designer***
*PLDA Member

Neue Str. 55
21073, Hamburg
Deutschland

+49 162 6050060
nynassif@gmail.com*

Hi,

at the moment, you can download only the old 3.7 release, but the pmap has been ported to current releases. Not sure when it will be public available.. Do you need a supported release?

Cheers, Lars.

···

--
Dipl.-Ing. Architect Lars O. Grobe

On Oct 26, 2012, at 9:18, nassif nassif <nynassif@gmail.com> wrote:

Hallo Lars,

Thanks a lot for your reply, but unfortunately i was not able to work on it. my administrator (who does the instlalation for us told me that it might not work on Radiance version 4.2a; is it true? if yes which version of radiance i should work with?

thanks a lot again!

- Nassif

On Mon, Oct 8, 2012 at 1:05 PM, <radiance-general-request@radiance-online.org> wrote:
Send Radiance-general mailing list submissions to
        radiance-general@radiance-online.org

To subscribe or unsubscribe via the World Wide Web, visit
        http://www.radiance-online.org/mailman/listinfo/radiance-general
or, via email, send a message with subject or body 'help' to
        radiance-general-request@radiance-online.org

You can reach the person managing the list at
        radiance-general-owner@radiance-online.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Radiance-general digest..."

Today's Topics:

   1. weather data in radiance (shailan zareiy)
   2. Monte Carlo sampling setting (Iebele)
   3. Re: Monte Carlo sampling setting (Greg Ward)
   4. Re: weather data in radiance (Greg Ward)
   5. Re: weather data in radiance (Lars O. Grobe)
   6. photomapping example (nassif nassif)
   7. Re: photomapping example (Lars O. Grobe)
   8. Re: weather data in radiance (shailan zareiy)

----------------------------------------------------------------------

Message: 1
Date: Sun, 7 Oct 2012 23:48:08 +0330
From: shailan zareiy <sh.zareiy@gmail.com>
To: radiance-general@radiance-online.org
Subject: [Radiance-general] weather data in radiance
Message-ID:
        <CABNGNZJpYU6r+=8OLKkEvrsVPGLxtdxWH7xQbPj7oU5ganX0Jw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

dear all
hi,i have a question about the weather data in radiance simulation. i want
to know which items of weather data is used in a daylight simulation by the
radiance software.
thanks for your help
Sincerely
Shailan Zareiy
-------------- next part --------------
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------------------------------

Message: 2
Date: Sun, 7 Oct 2012 23:57:38 +0300
From: Iebele <iabel@iebele.nl>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: [Radiance-general] Monte Carlo sampling setting
Message-ID: <DF1DA428-C7A0-40B8-8924-B92B62411DDB@iebele.nl>
Content-Type: text/plain; charset=windows-1252

Hi Greg,

I need a test with true Monte Carlo sampling (in the contrary as many earlier requests, I need as much variance in different runs of rpiece as possible).
I assume rpiece takes the same default values as rpict (?)

"rpict -defaults" gives:

-u- # correlated quasi-Monte Carlo sampling

It is not clear to me how to set true Monte Carlo sampling on.

-u+ ?

Cheers,

- iebele

------------------------------

Message: 3
Date: Sun, 7 Oct 2012 14:42:20 -0700
From: Greg Ward <gregoryjward@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] Monte Carlo sampling setting
Message-ID: <BCF5B7A0-C3AC-413B-BAFB-86B0FDC651A1@lmi.net>
Content-Type: text/plain; charset=us-ascii

Yes and yes. You can use the -u+ option in rpiece, along with all the other rpict options. I recommend setting "-ps 1" as well for pure MC.

-Greg

> From: Iebele <iabel@iebele.nl>
> Date: October 7, 2012 1:57:38 PM PDT
>
> Hi Greg,
>
> I need a test with true Monte Carlo sampling (in the contrary as many earlier requests, I need as much variance in different runs of rpiece as possible).
> I assume rpiece takes the same default values as rpict (?)
>
> "rpict -defaults" gives:
>
> -u- # correlated quasi-Monte Carlo sampling
>
> It is not clear to me how to set true Monte Carlo sampling on.
>
> -u+ ?
>
> Cheers,
>
> - iebele

------------------------------

Message: 4
Date: Sun, 7 Oct 2012 14:44:20 -0700
From: Greg Ward <gregoryjward@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID: <76D314B2-66B7-442A-A52F-ED940AB8E982@lmi.net>
Content-Type: text/plain; charset="us-ascii"

Radiance doesn't take weather data directly. The gensky and gendaylit programs in Radiance can use some information from weather tapes to adjust their sky models, but there aren't any built-in utilities to handle weather tapes.

Daysim does have such utilities, and we are hoping to add some facilities in the next year or so.

-Greg

> From: shailan zareiy <sh.zareiy@gmail.com>
> Date: October 7, 2012 1:18:08 PM PDT
>
> dear all
> hi,i have a question about the weather data in radiance simulation. i want to know which items of weather data is used in a daylight simulation by the radiance software.
> thanks for your help
> Sincerely
> Shailan Zareiy
-------------- next part --------------
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------------------------------

Message: 5
Date: Mon, 08 Oct 2012 11:32:17 +0200
From: "Lars O. Grobe" <grobe@gmx.net>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID: <50729DA1.2030803@gmx.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

just one hint - if you need to process weather data, tr (to replace
separators) and awk (to select and reformat fields of records) will be
helpful to load the relevant fields into gendaylit. Both are standard
tools in any Unix-like system, includig Mac OS X and Linux.

Cheers, Lars.

------------------------------

Message: 6
Date: Mon, 8 Oct 2012 12:22:03 +0200
From: nassif nassif <nynassif@gmail.com>
To: radiance-general@radiance-online.org
Subject: [Radiance-general] photomapping example
Message-ID:
        <CAOQvQd=Xv2i14tda4O6AYNbQ7h5ZUEd5WjkQr_u0mdPVde_OHw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

hallo people,

I am planning to simulate a simple geometry using photomapping.

Is there any simple script of how photo-mapping works? my aim is to check
the output for different material (glass, prism, trans...) feeded with a
narrow beam Fixture which results different outputs.

thanks in advance!

--
*N.Nassif

Lighting Designer***
*PLDA Member

Neue Str. 55
21073, Hamburg
Deutschland

+49 162 6050060
nynassif@gmail.com*
-------------- next part --------------
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------------------------------

Message: 7
Date: Mon, 08 Oct 2012 12:43:47 +0200
From: "Lars O. Grobe" <grobe@gmx.net>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] photomapping example
Message-ID: <5072AE63.2030702@gmx.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Nassif!
> I am planning to simulate a simple geometry using photomapping.
>
> Is there any simple script of how photo-mapping works? my aim is to
> check the output for different material (glass, prism, trans...)
> feeded with a narrow beam Fixture which results different outputs.
Start with Roland's documentation of the pmap extension for Radiance. It
explains most. Especially look for the supported / unsupported
primitives. Than, vary the number of photon in the distribution pass
(try up to 2,000,000 photons) and the bandwith in the photon gather
pass. Basically, pmap is not too different from using Radiance, you just
create the photon maps with mkpmap first and use them instead of the
ambient calculation in rpcit / rtrace. Don't forget to manually delete
the photon maps, they are not overwritten by mkpmap (adding a --force /
-f option for overwriting would be a useful add-on...).

I showed some examples at a presentation two years ago:
http://www.radiance-online.org/community/workshops/2010-freiburg/PDF/PmapAppsPresentation-20100922.pdf

There are several presentations on the pmap around for the recent
workshops, all available at radiance-online.org.

Cheers, Lars.

------------------------------

Message: 8
Date: Mon, 8 Oct 2012 14:35:05 +0330
From: shailan zareiy <sh.zareiy@gmail.com>
To: Radiance general discussion <radiance-general@radiance-online.org>
Subject: Re: [Radiance-general] weather data in radiance
Message-ID:
        <CABNGNZLR2ijk_iLmzJjOHLoWG2=8ipuzfv7HxXuvYiwBWbF+Uw@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

so you mean that radiance extracts the sky conditions such as sky clearness
from the weather data not just altitude and longitude of the city?

On Mon, Oct 8, 2012 at 1:14 AM, Greg Ward <gregoryjward@gmail.com> wrote:

> Radiance doesn't take weather data directly. The gensky and gendaylit
> programs in Radiance can use some information from weather tapes to adjust
> their sky models, but there aren't any built-in utilities to handle weather
> tapes.
>
> Daysim does have such utilities, and we are hoping to add some facilities
> in the next year or so.
>
> -Greg
>
> *From: *shailan zareiy <sh.zareiy@gmail.com>
>
> *Date: *October 7, 2012 1:18:08 PM PDT
>
> *
> *
>
> dear all
> hi,i have a question about the weather data in radiance simulation. i want
> to know which items of weather data is used in a daylight simulation by the
> radiance software.
> thanks for your help
> Sincerely
> Shailan Zareiy
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general@radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
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------------------------------

_______________________________________________
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Radiance-general@radiance-online.org
http://www.radiance-online.org/mailman/listinfo/radiance-general

End of Radiance-general Digest, Vol 104, Issue 6
************************************************

--
N.Nassif

Lighting Designer
PLDA Member

Neue Str. 55
21073, Hamburg
Deutschland

+49 162 6050060
nynassif@gmail.com
_______________________________________________
Radiance-general mailing list
Radiance-general@radiance-online.org
http://www.radiance-online.org/mailman/listinfo/radiance-general