Realistic renderings with Honeybee

Replies to This Discussion

Permalink Reply by Anton Szilasi on August 8, 2016 at 3:48pm

To answer my own question, this is possible with the image based simulation component and the Honeybee false color component, however I'm not sure how to overlay daylighting results like seen in the 2nd picture

Permalink Reply by Sarith Subramaniam on August 8, 2016 at 4:07pm

Hi Anton,

I think you can do it by using the colortext primitive in Radiance. You can locate the text from the pts file that Honeybee generates, assign a directional vector based on the view specification and assign color as per the illuminance value. (This is most likely what they did above anyway...) 

The other approach is to generate an equally sized jpg/bmp/tiff with numbers alone, then do a reverse conversion to HDR and finally combine the two images with pcomb.

I just don't think it is worth the effort as even in the image above, the numbers in the end are completely obscured. I prefer the mesh thingy that we already have :)

Sarith

Permalink Reply by Anton Szilasi on August 15, 2016 at 8:38am

Hi Sarith

Thanks for your helpful reply, you are right you can indeed assign the text values in radiance however Im not sure how to do a reverse conversion to HRD and combine to a Pcomb do you have an example of this?

Permalink Reply by Sarith Subramaniam on August 15, 2016 at 10:18pm

Hi Anton,

Here is a quick and dirty example..

The files are attached. The key is to have them to be of the same size, which should be possible if you are using the same viewport in both images. The resulting image looks dark I guess because I just used a plain rgb image without any luminance values for the conversion... If we put enough thought into it (ie more than the three command lines that I wrote) I am sure we can get the image to be exactly the way we want it be...

Attachments:

• 1.bmp, 2.5 MB
• res.bmp, 2.5 MB
• 2.bmp, 2.5 MB

Permalink Reply by Juan Carlos Fornino on February 8, 2017 at 7:29am

Hi Sarith,

We have been adding images using pcomb in the command line. Is there a way of doing it from grasshopper? 

I saw that you started writing something about it in github

Juan Carlos

Permalink Reply by Sarith Subramaniam on February 8, 2017 at 7:32pm

Hi Juan,

That script on github is actually for Honeybee[+]. You can read about it here. If all goes to plan, we should have a public release of that sometime this month. The emphasis on that project, however, is on matrix-based daylighting simulation methods like the Three Phase method. So, I am not sure if Pcomb will be "exposed" for general use.

Anyways, I had written a light wrapper for pcomb a while ago. I have cleaned it up a bit. You should be able to use it. See the attached gh file. As to what the script can do, see the video below:

Attachments:

• pcomb.gh, 450 KB

Permalink Reply by Juan Carlos Fornino on February 9, 2017 at 10:09am

This is great! Thanks Sarith.