Simulating IES lamps file through RAD materials

Hi to everyone,

in this tutorial ( http://diva4rhino.com/page/simulating-luminaires-with-ies-files ) is shown a method to simulate a lamp in DIVA. Considering that the process is about a modding of radiance materials, do you think that it would be possible to do the same in honeybee?

To go deeper I have tried to do the tutorial about DIVA, but in its grasshopper version: it doesn't work. To be more precise, the material, applied to a brep, is not read by the DIVA daylight simulator. Actually I don't know if I'm mistaken about some details.

it would be great if only it could be possible in honeybee! for instance I have found this study which is pretty interesting to calculate lamps power consumptions directly in honeybee: https://sites.google.com/site/just4architecture/research/responsive...

Thank you,

Claudio

Replies are closed for this discussion.

Replies to This Discussion

Permalink Reply by Mostapha Sadeghipour Roudsari on April 13, 2014 at 4:24pm

Hi Claudio,

Thank you for sharing the links. Similar approach can be applied to Honeybee however it is not currently implemented. I personally don't want to implement lighting simulation to Honeybee at this point. So much can go wrong there for inexperienced users.

I saw your discussion on DIVA page and I'm pretty sure Alstan will have a solution for that. Keep me posted about the results. If you really need it for your studies I can apply it to Honeybee over the next weekend.

Tuan's work is also pretty interesting. Thanks for sharing. I wish I could read more details about his project.

Cheers,

Mostapha

Permalink Reply by Mostapha Sadeghipour Roudsari on April 17, 2014 at 11:33pm

First try:

Permalink Reply by Mostapha Sadeghipour Roudsari on April 18, 2014 at 1:14pm

Hi Claudio,

Check the attached file for the WIP component. I ran couple of test cases and the result looks fine but the results still should to be validated.

Also it will only work for IES files with rectangle surfaces. Do you have any elliptical examples? You can also read IES2RAD manual page: (http://radsite.lbl.gov/radiance/man_html/ies2rad.1.html)

Let me know how it goes.

Mostapha

Attachments:

IES2HB_WIP.gh, 115 KB

Permalink Reply by Maverick_n13 on September 2, 2015 at 12:44pm

Hi Mostapha I have realize that you where using lights form "XAL" with rectangular shapes. Is it possible to do the same with IGUZZINI or other companies IES files?? because nothing works outside some XAL lights.

Thanks!

Permalink Reply by Mostapha Sadeghipour Roudsari on September 2, 2015 at 1:27pm

Hi Maverick,

Can you upload an example IES definition that doesn't work for you? Current component doesn't support all available shapes. Also this file is old. Did you try the more updated version? Here is an example file: http://www.grasshopper3d.com/group/ladybug/forum/topics/simulating-...

Permalink Reply by Maverick_n13 on September 3, 2015 at 2:19am

Thanks for your support Mostapha, :)

The thing is that I sitll have the same problem as before, even with your new script. My lamp is not visible. I got an empty parameter. I have used a lamp from XAL check out the escript and the IES file

Attachments:

Permalink Reply by Mostapha Sadeghipour Roudsari on September 5, 2015 at 10:51pm

This IES files are circles which wasn't supported by IES>HB. I added them. Check the attached file for an example. It should support rectangular, sphere, and circle shapes. There might be other shapes that are not currently supported but it's not hard to add other primitive shapes if needed.

You need to use the most updated version of Honeybee_Honeybee.

Attachments:

IES2HB_RingTypeAdded.gh, 104 KB

Permalink Reply by Maverick_n13 on September 7, 2015 at 6:17am

Thanks for this, It works perfect.

Another issue is the rotation of the lamps>>

Do you think there is a way of implementing it? In order to allocate several lamps with different positions. This would be closer to the real conditions in a design project.

If this issue could be fixed in your component, it would be really powerful since you could update the model and the obtained data in a live process.

Permalink Reply by Mostapha Sadeghipour Roudsari on September 7, 2015 at 6:56am

Thanks. This has been on the list for a long time now (http://www.grasshopper3d.com/group/ladybug/forum/topics/simulating-...). There are solutions and Sarith has already developed a number of components for this purpose. I just sent him an email to see if he's still thinking to share the components, otherwise I will implement it at some point soon.

See page 40 of this presentation: http://www.radiance-online.org/community/workshops/2015-philadelphi...

Permalink Reply by Maverick_n13 on September 8, 2015 at 2:57am

mmm... this components at page 40 look hot.

If you find the way to agree with him on sharing them... give me a shout.

;)

Permalink Reply by Claudio Campanile on April 19, 2014 at 4:51am

Wow, amazing work. I'm quite luck not having surfaces different from rectangles, however, it would be nice to be able to include rounded shape diffusors within the foreseeable future.

I will try to check if results are fine trying a comparison between 'Bee and Dialux (using IES file for both to be sure that results derive from tha same input).

Glancing at the Zumtobel website (or Philips, or whatelse) there should be some stuff to feed the new Honeybee component IES2HB.

Thank you,

Claudio

Permalink Reply by Claudio Campanile on April 22, 2014 at 11:09am

Hi Mostapha,

doing the test I see that some IES files are not converted by the new component. I mean that ies2hb creates a batch file in the folder without make it running. If I execute it, however, it creates the file (*.rad & *.dat) and everything goes ok. Actually I have no idea about where the problem is: the command in Python looks fine but I'm not good at programming [line 175: runCmdAndGetTheResults( "/c " + batchFilePath) ].

In addition to this I guess that creating an input (domain 0 -> 1) able to modify the multiplier parameter in the IES file before the conversion to the radiance format would make it complete.

I have attached the IES file to let you try how it runs.

let me know your thought,

Claudio

PS: the IES attached is taken from http://www.zumtobel.com/com-en/products/1338.html?42915795 . It is also quite curious how the component creates two polygons where is applied the light material.

I have found some interesting data sheets about IES file format:

http://www.ltblight.com/English.lproj/LTBLhelp/pages/iesformat.html

http://www.cn-hopu.com/upload/file/IES.pdf

http://docs.autodesk.com/ACD/2013/ENU/index.html?url=files/GUID-45C...

Attachments: