[Radiance-openstudio] Updated Radiance Installers Available

Sorry for taking this topic back alive but I have two questions.

1.- (I do not know much about programming) Why are dctimestepCPU(GPU) no
longer needed? is this new version as fast as GPU calculation? was there ay
disadvantage?

2.- It seems that I can not download the epw2wea program. Do I have to
download the entire DAYSIM package?

THANKS

German

···

2013/2/19 Andrew McNeil <[email protected]>

Just to clarify, you do need the newest head version of dctimestep to use
the skymatrix generated by gendaymtx in a three-phase calc.

it goes like this:
gendaylit Chicago.wea > Chicago.smx
dctimestep -n 8760 sensors.vmx fenestration.xml exterior.dmx Chicago.smx >
illuminance.txt

(where -n is the number of time steps in your sky matrix file)

You can use epw2wea from daysim to convert epw to wea format (
http://daysim.ning.com/subprogram/epw2wea).

Andy

On Tue, Feb 19, 2013 at 12:16 PM, Guglielmetti, Robert < > [email protected]> wrote:

Hi German,

Yes, gendaymtx is in the HEAD, the installers in the NREL site are based
on the HEAD as of Thursday of last week, I believe. And no, the GPU
dctimestep is not needed for this to work (nor is that version of
dctimestep in HEAD). Nope, gendaymtx works with all the standard Radiance
tools. You simply need a weather file formatted the way it wants, which is
the same format as a DAYSIM weather file. Andy McNeil notes that DAYSIM has
a tool to convert the EnergyPlus weather file format (.epw) to the DAYSIM
format. OpenStudio will be modified to automatically provide gendaymtx with
the epw data in the format it expects. I noticed that gendaymtx also
accepts weather data from STDIN, and that there is an option to feed it
less than a full year (8760) of data. We will leverage this ability in
OpenStudio for sure, as well.

Exciting times!

- Rob

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]

-----Original Message-----
*From: *Germán Molina Larrain [[email protected]]
*Sent: *Tuesday, February 19, 2013 12:25 PM Mountain Standard Time
*To: *Radiance general discussion
*Cc: *bldg-sim; radiance-openstudio
*Subject: *Re: [Radiance-general] Updated Radiance Installers Available

Good to know!

Is gendaymtx available in the HEAD version of Radiance? Is the GPU
version of dctimestep needed for using that?

THANKS VERY MUCH

German

2013/2/19 Guglielmetti, Robert <[email protected]>

Hi folks,

Just a quick note to let you all know that the Radiance installers have
been updated, and are available for download at the NREL OpenStudio site.
These packages include the brand new 'gendaymtx' utility that greatly
speeds up the annual calculation when using the daylight coefficient tools
in Radiance.

We hope to add gendaymtx into the OpenStudio tool chain and workflow in
the coming weeks, but in the meantime, I'm sure Greg would appreciate any
feedback from users willing to try it out on their own, especially those
Windows users out there. There's a man page explaining its use, and it's
pretty straightforward.

Grab yours here:

http://openstudio.nrel.gov/getting-started-developer/getting-started-radiance

Ok, bye.

-Rob Gee

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-openstudio mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-openstudio

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

Hi German,

While I can't speak to #1, with regards to #2 the epw2wea program comes along with DAYSIM, so you do need to download the entire package from http://daysim.ning.com/page/download. If you are using Linux, the windows download includes source which can be compiled on Linux.

Best,
Alstan

···

On Fri, 22 Feb 2013 09:57:10 -0500, Germán Molina Larrain <[email protected]> wrote:

Sorry for taking this topic back alive but I have two questions.

1.- (I do not know much about programming) Why are dctimestepCPU(GPU) no
longer needed? is this new version as fast as GPU calculation? was there ay
disadvantage?

2.- It seems that I can not download the epw2wea program. Do I have to
download the entire DAYSIM package?

THANKS

German

2013/2/19 Andrew McNeil <[email protected]>

Just to clarify, you do need the newest head version of dctimestep to use
the skymatrix generated by gendaymtx in a three-phase calc.

it goes like this:
gendaylit Chicago.wea > Chicago.smx
dctimestep -n 8760 sensors.vmx fenestration.xml exterior.dmx Chicago.smx >
illuminance.txt

(where -n is the number of time steps in your sky matrix file)

You can use epw2wea from daysim to convert epw to wea format (
http://daysim.ning.com/subprogram/epw2wea).

Andy

On Tue, Feb 19, 2013 at 12:16 PM, Guglielmetti, Robert < >> [email protected]> wrote:

Hi German,

Yes, gendaymtx is in the HEAD, the installers in the NREL site are based
on the HEAD as of Thursday of last week, I believe. And no, the GPU
dctimestep is not needed for this to work (nor is that version of
dctimestep in HEAD). Nope, gendaymtx works with all the standard Radiance
tools. You simply need a weather file formatted the way it wants, which is
the same format as a DAYSIM weather file. Andy McNeil notes that DAYSIM has
a tool to convert the EnergyPlus weather file format (.epw) to the DAYSIM
format. OpenStudio will be modified to automatically provide gendaymtx with
the epw data in the format it expects. I noticed that gendaymtx also
accepts weather data from STDIN, and that there is an option to feed it
less than a full year (8760) of data. We will leverage this ability in
OpenStudio for sure, as well.

Exciting times!

- Rob

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]

-----Original Message-----
*From: *Germán Molina Larrain [[email protected]]
*Sent: *Tuesday, February 19, 2013 12:25 PM Mountain Standard Time
*To: *Radiance general discussion
*Cc: *bldg-sim; radiance-openstudio
*Subject: *Re: [Radiance-general] Updated Radiance Installers Available

Good to know!

Is gendaymtx available in the HEAD version of Radiance? Is the GPU
version of dctimestep needed for using that?

THANKS VERY MUCH

German

2013/2/19 Guglielmetti, Robert <[email protected]>

Hi folks,

Just a quick note to let you all know that the Radiance installers have
been updated, and are available for download at the NREL OpenStudio site.
These packages include the brand new 'gendaymtx' utility that greatly
speeds up the annual calculation when using the daylight coefficient tools
in Radiance.

We hope to add gendaymtx into the OpenStudio tool chain and workflow in
the coming weeks, but in the meantime, I'm sure Greg would appreciate any
feedback from users willing to try it out on their own, especially those
Windows users out there. There's a man page explaining its use, and it's
pretty straightforward.

Grab yours here:

http://openstudio.nrel.gov/getting-started-developer/getting-started-radiance

Ok, bye.

-Rob Gee

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

Hi German,
The GPU code didn't provide any acceleration over CPU code for a single
annual run, It only helps for dozens or more parametric annual runs (many
BSDF's many view matrices, many climates ...) and even then it was only
marginally better.

The bulk of the acceleration in the dctimestep?pu code comes from loading
the data once and multiplying everything once. The old way of doing
dctimestep for a single time step and looping requires the V, T &
D matrices to be loaded and multiplied for each time step - clearly this
isn't efficient for an annual run since the matrices don't change.

The updated version of dctimestep performs as well as the dctimestep?pu, is
more robust than dctimestep?pu (no segfaults when matrix dimensions don't
match) and can handle rendered view matrices.

Yes, you gan give dctimestep a rendered view matrix and have hourly annual
renderings after about 2 hours.

Hope that helps,
Andy

···

On Fri, Feb 22, 2013 at 6:57 AM, Germán Molina Larrain <[email protected]>wrote:

Sorry for taking this topic back alive but I have two questions.

1.- (I do not know much about programming) Why are dctimestepCPU(GPU) no
longer needed? is this new version as fast as GPU calculation? was there ay
disadvantage?

2.- It seems that I can not download the epw2wea program. Do I have to
download the entire DAYSIM package?

THANKS

German

2013/2/19 Andrew McNeil <[email protected]>

Just to clarify, you do need the newest head version of dctimestep to use
the skymatrix generated by gendaymtx in a three-phase calc.

it goes like this:
gendaylit Chicago.wea > Chicago.smx
dctimestep -n 8760 sensors.vmx fenestration.xml exterior.dmx Chicago.smx
> illuminance.txt

(where -n is the number of time steps in your sky matrix file)

You can use epw2wea from daysim to convert epw to wea format (
http://daysim.ning.com/subprogram/epw2wea).

Andy

On Tue, Feb 19, 2013 at 12:16 PM, Guglielmetti, Robert < >> [email protected]> wrote:

Hi German,

Yes, gendaymtx is in the HEAD, the installers in the NREL site are based
on the HEAD as of Thursday of last week, I believe. And no, the GPU
dctimestep is not needed for this to work (nor is that version of
dctimestep in HEAD). Nope, gendaymtx works with all the standard Radiance
tools. You simply need a weather file formatted the way it wants, which is
the same format as a DAYSIM weather file. Andy McNeil notes that DAYSIM has
a tool to convert the EnergyPlus weather file format (.epw) to the DAYSIM
format. OpenStudio will be modified to automatically provide gendaymtx with
the epw data in the format it expects. I noticed that gendaymtx also
accepts weather data from STDIN, and that there is an option to feed it
less than a full year (8760) of data. We will leverage this ability in
OpenStudio for sure, as well.

Exciting times!

- Rob

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]

-----Original Message-----
*From: *Germán Molina Larrain [[email protected]]
*Sent: *Tuesday, February 19, 2013 12:25 PM Mountain Standard Time
*To: *Radiance general discussion
*Cc: *bldg-sim; radiance-openstudio
*Subject: *Re: [Radiance-general] Updated Radiance Installers Available

Good to know!

Is gendaymtx available in the HEAD version of Radiance? Is the GPU
version of dctimestep needed for using that?

THANKS VERY MUCH

German

2013/2/19 Guglielmetti, Robert <[email protected]>

Hi folks,

Just a quick note to let you all know that the Radiance installers have
been updated, and are available for download at the NREL OpenStudio site.
These packages include the brand new 'gendaymtx' utility that greatly
speeds up the annual calculation when using the daylight coefficient tools
in Radiance.

We hope to add gendaymtx into the OpenStudio tool chain and workflow in
the coming weeks, but in the meantime, I'm sure Greg would appreciate any
feedback from users willing to try it out on their own, especially those
Windows users out there. There's a man page explaining its use, and it's
pretty straightforward.

Grab yours here:

http://openstudio.nrel.gov/getting-started-developer/getting-started-radiance

Ok, bye.

-Rob Gee

Rob Guglielmetti
Commercial Buildings Research Group
National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway MS: RSF202
Golden, CO 80401
303.275.4319
[email protected]
_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-openstudio mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-openstudio

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general