[Radiance-daysim] Changing north direction in Daysim

Wed Nov 12 05:47:01 PST 2014

Thanks Amalie, 
  I do not want other software,need the precision of daysim and Radiance -no way around needed.  
  Will be glad to post any results as soon as trigger it out.  
  best,  N.  

 -------- Оригинално писмо --------

От: Amalie Momme amaliemomme at gmail.com

Относно: Re: [Radiance-daysim] Changing north direction in Daysim

До: DAYSIM discussion  

Изпратено на: Сряда, 2014, Ноември 12 15:32:04 EET

    Hi Niya

    Unfortunately I haven't worked with results in Ecotect, so I have no experience with importing DAYSIM results back into Ecotect. I had a lot of sensor points (parametric study, offices in urban environments), so I used Excel for data analysis and presentation. I created the 3D model in Ecotect, that's all,
and then
manually set the material properties and sensor points. 

    If you are
concerned about reliability and you
need only
to create a rendering of the Daylight Factor and particular daylight scenes
without
it being too complicated, you can use the
software Velux Visualizer - this does 3D renderings as well. Of course not with the same precision as DAYSIM (annual based
tool) or RADIANCE (renderings). If you wish to do this, you can create your 3D model in Google Sketchup, and then import this into Velux Visualizer. This is very fast and simple and gives a nice visual image. This does not
take
electrical lighting into account
though, it is a daylight tool
:-) Also, there is Dialux but this I am less familiar with. This does take electrical lighting into account. 

    I hope you figure it out, do post the answer if you do - I am sorry I do not have the time to dig deeper into this. 

    Amalie

    2014-11-12 13:53 GMT+01:00 Todor Syarov 
      thodor at abv.bg > :

       Hi Amalie, 

        thanks for the fast response. this approach ive been using as well- for this reason i also rotated back the file in Daysim. 

        I don´t know if you have experienced this... Sometimes, the Daysim Sensor point file used for a model imported from  

        Ecotect has some odd coordinates, that do not match 
the
   previously defined grid in Ecotect. This is usually the case when you export from
   Ecotect a model that has the North position rotated from the default   axis for the simulation ... I suspect that 
the
   original "test.pts" (Ecotect )grid becomes
   translated into a coordinate axis responing to the north orientation,
   and the sensor point file used in Daysim is then named
   "test.pts.rotated.    pts".
    Hence, the ".da" files reimported to Ecotect from
  Daysim show the same rotated
   coordinates.

         This is my concern, WHETHER  
they are reliable to

          display the simulation results without me having to intervene with rotating the scene in .hea file?  

          best,  

          Niya  

 -------- Оригинално писмо -------- 
От: Amalie Momme  amaliemomme at gmail.com  
Относно: Re: [Radiance-daysim] Changing north direction in Daysim 
До: DAYSIM discussion  radiance-daysim at radiance-online.org > 
 Изпратено на: Сряда, 2014, Ноември 12 14:27:58 EET 

             Hello Niya, 

             I got the rotated pts file as well, however this was not correct -
but
this was the pts file I made myself. If you download the program Notepad++ (It's just an advanced Notepad which can handle different types of text files), you can see your pts file. 

             A pts file
contains nothing but the coordinates of your sensor points and then a direction vector, (0 0 1) pointing up. 

             Example: 

             2.000 3.000 0.850 0.000 0.000 1.000 

             3.000 3.000 0.850 0.000 0.000 1.000 

             this is two sensor points placed at the coordinates (x,y,z) = (2,3,0.85), and they're both pointing straight up. 

             With notepad++ you can create this, and when saving the file, type the name and add '.pts'. Voila, you have a pts file :-) Of course, then you have to know the coordinate system in DAYSIM, and I believe that north is always the same as positive y-axis. 

             But if you do create your own sensorpoint file, you cannot see the results in Ecotect as I believe you can with the auto generated pts file. 

             Good luck with it! 

             Amalie 

             2014-11-12 13:13 GMT+01:00 Todor Syarov 
              thodor at abv.bg > : 

Hello Amalie, 

                After I edit the.hea file and rotate the scene I get created a new filename.pts.rotate.pts file. I assume it is with the rotated points - i am trying to find a way to verify this still. 

                I would be interested to know how do you create the rotated sensorpoint file?

                Best, 

                Niya 

 -------- Оригинално писмо -------- 

От: Amalie Momme 
                amaliemomme at gmail.com  

Относно: Re: [Radiance-daysim] Changing north direction in Daysim 

До: DAYSIM discussion < 
                radiance-daysim at radiance-online.org > 

Изпратено на: Сряда, 2014, Ноември 12 14:08:52 EET 

                    Hi Niya, 

                    I also worked with Daysim and Ecotect. I did not use the auto generated grid in Ecotect, but made a sensorpoint file myself, so I do not know if it is the same with the Ecotect grid. However, when I tried to rotate the building in Daysim, the sensorpoints did not rotate with the model. I had to make a new sensorpoint file to match the rotated building. 

                    Cheers, 

                    Amalie 

                    2014-11-11 18:57 GMT+01:00 Todor Syarov 
                     thodor at abv.bg > : 

                         Hello Alstan,    

                         I need to apply the same command. There is some weird correspondance btw the Ecotect and the Daysim values, and I assume from reading the forums, that it is because of the North orientation.   

                         Could you, please, assist me with how to
 run the Daysim subprogram rotate_scene to make this work?    

                          Regards,    

                          Niya    

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