[Radiance-general] RE : Light Shelf Reflections

[Shamim Javed]

That was an aspect I had not thought about.  Thanks for the tip!  I went
back and fixed the surface normal's in my model.  It did not, however,
create the reflections I am looking for.


On Tue, Mar 12, 2013 at 6:03 PM, Andrew McNeil <amcneil at lbl.gov> wrote:

> Shamim,
>
> Your ceiling surface normal is facing up (which matters for the mirror
> type).  Change polygon zone91.rad00770 to what is copied below.
>
> Also make sure that you set -dr and -lr parameters to the number of mirror
> reflections you want to have (8 or so?).
>
> Let me know if you still don't see what you are expecting.
>
> Best,
> Andy
>
>
>
> Morror_Ceiling polygon zone91.rad00770
> 0
> 0
> 15
>   1.21920  2.89560  7.16280
>   1.21920  21.18360  7.16280
>   10.36320  21.18360  7.16280
>   10.36320  2.89560  7.16280
>   1.21920  2.89560  7.16280
>
>
> On Tue, Mar 12, 2013 at 1:47 PM, Shamim Javed <javeds2006 at gmail.com>wrote:
>
>> Apologies for sending the wrong link.  Here is one that should work!
>>
>> https://www.dropbox.com/sh/a8e7o5mugbluqdn/GVS1vZKjNC
>>
>>
>> Shamim.
>>
>>
>>
>> On Tue, Mar 12, 2013 at 1:00 PM, shailan zareiy <sh.zareiy at gmail.com>wrote:
>>
>>> hi Shamim
>>> do you assign the mirror surfaces as secondary light source? if you use
>>> ecotect for modelling, in the material assignment of this software, in the
>>> advanced export you should write this discription :
>>>  void mirror materail name
>>> 0
>>> 0
>>> 3  1 1 1
>>> does it solve the problem?
>>>
>>>
>>> On Mon, Mar 11, 2013 at 6:45 PM, Compagnon Raphaël <
>>> Raphael.Compagnon at hefr.ch> wrote:
>>>
>>>> If all these surfaces are mirrors, then you cannot see anything....
>>>> unless:
>>>> - there is a non-mirror reflecting object somewhere in your scene that
>>>> is supoposed to be lit by the multiple-reflecting light path; since it will
>>>> reflect light in many directions you should see it!
>>>> or
>>>> - your point of view is located somewhere on the multiple-reflecting
>>>> light path and your view direction points towards it. Then you should
>>>> directly see the light source appearing as an image on the last mirror.
>>>>
>>>> Raphaël
>>>> ________________________________
>>>> De : Shamim Javed [javeds2006 at gmail.com]
>>>> Date d'envoi : lundi 11 mars 2013 15:56
>>>> À : Radiance general discussion
>>>> Objet : Re: [Radiance-general] Light Shelf Reflections
>>>>
>>>> I am hoping to see multiple reflections of the light beam reflected off
>>>> the light shelf top surface in both the floor and the ceiling (all of which
>>>> are mirror surfaces).
>>>>
>>>> On Mon, Mar 11, 2013 at 10:40 AM, Jack de Valpine <jedev at visarc.com
>>>> <mailto:jedev at visarc.com>> wrote:
>>>> Hi Shamim,
>>>>
>>>> What changes are you expecting to see?
>>>>
>>>> -Jack
>>>>
>>>> --
>>>> Jack de Valpine
>>>> President
>>>>
>>>> Visarc Incorporated
>>>> www.visarc.com<http://www.visarc.com>
>>>>
>>>> channeling technology for superior design and construction
>>>>
>>>> On 3/11/2013 10:03 AM, Shamim Javed wrote:
>>>> I am using Radiance via Ecotect.  I have played around with changing
>>>> the values for -dr, -av and -ab without seeing any change in the image
>>>> output.
>>>>
>>>> On Mon, Mar 11, 2013 at 9:20 AM, Christopher Rush <
>>>> Christopher.Rush at arup.com<mailto:Christopher.Rush at arup.com>> wrote:
>>>> Are you using the default parameters for rpict/rtrace? Have you tried
>>>> setting the -dr parameter greater than 2? If you post the command you are
>>>> using to calculate the reflections, it may be easier to comment. I suspect
>>>> it will be more complicated than the -dr setting, but that's a start.
>>>>
>>>> >  I have been unsuccessful, so far, to generate  more than two
>>>> reflections.
>>>>
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