[Radiance-general] import from other software

[Jia Hu]

Hello:

First thank all of you for the replies.

I tried some ways mentioned, I am confused with some of the methods.

*(1)* When I export Revit to fbx and then use FBX converter (provided by
autodesk) to convert fbx to .obj file.  The .mtl file just contains the name
of materials without any other data such as RGB, or reflectance.

Also I tried to use: obj2rad -n objfile.obj > obj.data .    I found all the
materials in .obj file should be defined. Some of  them are as follows:

"Basic_Wall_Typ__Partition_Wall__188653_"
"Basic_Wall_Typ__Partition_Wall__188781_"
"Basic_Wall_Typ__Partition_Wall__188881_"
"Basic_Wall_Typ__Partition_Wall__188971_"
"Basic_Wall_Typ__Partition_Wall__189016_"
...... too long

Should I define so many materials? Maybe I should delete some of them if
they use the same materials.

*(2)* I am stuck with the command obj2rad. I just know some basic knowledge
of .obj file such as its basic structure, the basic command of obj file.
But  I can not follow the man page of obj2rad, such as mapping rule file.

Is that right the mapping rule file in this command contained the texture
and materials (like those in Radiance) or some images?  Should I write
up the mapping file by myself or just find from somewhere?   I have no idea
of what the mapping file is so, Could someone send me one or two
small examples of map files or others related to this command?

*(3)* When the building model is complicated, is that reliable for this
command? I mean whether it makes mistakes about the surface normals. Is
there any point that should be noted when using export Revit file to
Radiance?


*(4)* If I export .dwg, the torad autolisp (
http://www.schorsch.com/download/torad/) seems to be used for AutoCAD
R11-14. If I use Polytrans, for example, should I convert obj file? Is there
any better way?

*(5) *I do not have a SketchUp pro, so I just browsed the su2rad for free
version of SketchUp, it seems easy to understand.

Sorry for so many confusions and questions.

As always, Thank you all.

Jia


On Fri, Apr 30, 2010 at 10:50 AM, Nick Hubof <nhubof at gmail.com> wrote:

>  Our office uses Autodesk Ecotect mostly because of its ability to handle
> illumination grids, it is also well suited to export to Radiance. However it
> isn’t the best modeling program, so typically modeling in other programs and
> importing is one of the best options.
>
> When we bring in Revit models we import them as a .dwg.
>
> But when we bring in a Sketchup model it is imported as a .obj.
>
> Most architectural models have more detail than what is needed for daylight
> analysis or renderings, so alter the models within their native modeling
> program (Revit, Sketchup) first while thinking of how Ecotect/Radiance will
> handle it. Good luck.
>
>
>
> *From:* radiance-general-bounces at radiance-online.org [mailto:
> radiance-general-bounces at radiance-online.org] *On Behalf Of *Chris Yates
> *Sent:* Friday, April 30, 2010 8:39 AM
> *To:* 'Radiance general discussion'
> *Subject:* RE: [Radiance-general] import from other software
>
>
>
> Has anybody tried sweethome3d?
>
> http://www.sweethome3d.eu/faq.jsp
>
>
>
> It exports to obj with a corresponding mat file. Apart from that, I’m not
> clear on its abilities.
>
>
>
> *From:* radiance-general-bounces at radiance-online.org [mailto:
> radiance-general-bounces at radiance-online.org] *On Behalf Of *Jia Hu
> *Sent:* 28 April 2010 21:04
> *To:* Radiance general discussion
> *Subject:* Re: [Radiance-general] import from other software
>
>
>
> Thank you, Jack.I will take a look at it.
>
>
>
> Jia
>
> On Wed, Apr 28, 2010 at 2:56 PM, Jack de Valpine <jedev at visarc.com> wrote:
>
> Hi Jia,
>
> Here are a few options:
>
>   * revit -> fbx - then convert fbx to obj via fbx converter
>   * revit -> dwg - then convert via something like Polytrans or NuGraf
>   * revit -> dwg - then use torad autolisp export (this might need
>     updating though to function in current autocad)
>   * sketchup -> obj - via sketchup pro
>   * skectup -> rad - via su2rad
>
>
>
> -Jack
>
> --
> # Jack de Valpine
> # president
> #
> # visarc incorporated
> # http://www.visarc.com
> #
> # channeling technology for superior design and construction
>
>
>
> Jia Hu wrote:
>
>  Thanks for your prompt reply.
>  I use Revit Architecture, AutoCAD, and SketchUp. The first one is my
> priority. Is it possible to import from Revit?
>  Jia
>
>
>  On Wed, Apr 28, 2010 at 2:33 PM, Jack de Valpine <jedev at visarc.com<mailto:
> jedev at visarc.com>> wrote:
>
>    Hi Jia,
>
>    What are you trying to convert from? What software are you
>    modeling with?
>
>    -Jack
>
>    --     # Jack de Valpine
>    # president
>    #
>    # visarc incorporated
>
>    # http://www.visarc.com <http://www.visarc.com/>
>
>
>    #
>    # channeling technology for superior design and construction
>
>
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