[Radiance-general] Re: rad to wrl

[Jack de Valpine]

Hi Xian,

OK, well 20M from 50K probably means something is not quite right. I am 
pretty sure that you are not going to be able to translate Radiance 
modifiers such as "texfunc" to vrml. I expect you will only be able to 
translate basic materials such as plastic, metal or glass. Probably the 
first the to do is define some simple geometry with a basic material 
applied and see if you can get that to work. If this works then for your 
geometry you probably need to define an alternate set of materials using 
just the base material types.

-Jack

Yun-Xian Ho wrote:
> Hi Jack,
>
> The radiance data is 50kb. Not very large at all. And I am translating 
> the materials and light as well in one line with rad2mgf. It seems 
> that the output in the vrml file contains many of the following lines 
> repeated with different values:
>
> # Unsupported RADIANCE primitive:
> # gray_plastic texfunc Phong
> # 4 surf_dx surf_dy surf_dz surf.cal
> # 0
> # 13 2 0303123 ...
>
> Clues?
>
> --xian
>
> Jack de Valpine wrote:
>> Hi Xian,
>>
>> I really do not know that much about vrml. I just happened to know 
>> the possible translation pipeline.... I guess am not surprised that 
>> the file is large. How large is the corresponding radiance data? Are 
>> you also translating the materials? You will most likely need to have 
>> materials defined in vrml and perhaps even some lighting for proper 
>> display. I have posted this back to the list. Perhaps someone else 
>> has some insights?
>>
>> -Jack
>>
>> Yun-Xian Ho wrote:
>>> Hi Jack,
>>>
>>> I tried your suggested method of converting my rad file into vrml
>>> format. However, I encountered two problems: (1) the wrl file is HUGE
>>> (over 20mb) and one file can hardly be worth that much and (2) the wrl
>>> file will does not seem to be properly displayed by my browser which
>>> currently has cortona installed (including the VRML 1.0 converter).
>>> Links to to the .wrl file and the .ppm file can be found at the
>>> following links, respectively:
>>>
>>> http://homepages.nyu.edu/~yxh201/bumps_030.wrl
>>> http://homepages.nyu.edu/~yxh201/bumps_030.ppm
>>>
>>> Any suggestions?
>>>
>>> --xian
>>>
>>> ____________________________________________
>>> yun-xian ho
>>> e: yunxian.ho at nyu.edu
>>> c: 917.374.7598 -----------------------------
>>> Hi Xian,
>>>
>>> One option is to convert to mgf and then to to inventor/vrml:
>>>
>>>     rad2mgf -df myscene.rad > myscene.mgf
>>>     (converts to mgf format with units in feet)
>>>     mgf2inv -vrml mscene.mgf > myscene.vrml
>>>     (converts to vrml 1.0)
>>>
>>> mgf2inv converts to vrml 1.0, inventor 1.0 and inventor 2.0
>>>
>>> More about mfg can be found at:
>>>
>>>     http://radsite.lbl.gov/mgf/mgfhtml/intro.html
>>>
>>> -Jack
>>>
>>> ---------------------------
>>>
>>> Hi all,
>>>
>>> Does anyone know of an easy way to convert radiance files to VRML
>>> files?
>>>
>>> --xian
>>>
>>> ____________________________________________
>>> yun-xian ho
>>> e: yunxian.ho at nyu.edu
>>> c: 917.374.7598
>>>
>>>
>>>
>>>   
>>
>
>

-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
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