Search found 23 matches

by pro
Wed Feb 24, 2021 8:03 pm
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

In LuxCore, the values you list are not used. The code is a direct port of old LuxRender code. The parsing of lumen per lamp filed is here: https://github.com/LuxCoreRender/LuxCore/blob/577aea723aa439ee94b2545ddee8cc206cf18430/src/slg/core/sphericalfunction/photometricdataies.cpp#L252 The read valu...
by pro
Fri Mar 08, 2019 12:03 pm
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

Dade, why are writing that IES file doesn't include any absolute value? In LuxCore, the values you list are not used. The code is a direct port of old LuxRender code. The parsing of lumen per lamp filed is here: https://github.com/LuxCoreRender/LuxCore/blob/577aea723aa439ee94b2545ddee8cc206cf18430/...
by pro
Thu Mar 07, 2019 3:15 pm
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

Both irradiance AOV and RGB_IMAGEPIPELINE are the product of the same process so disabling the second AOV will have no tangible benefits. Thanks for the previous hint! I further tested Irradiance AOV and its output (produced light intensity patterns a.k.a. "false color plots") correspond ...
by pro
Sat Mar 02, 2019 9:12 am
Forum: User Support
Topic: Understanding .ies parameters, efficacy
Replies: 19
Views: 9912

Re: Understanding .ies parameters, efficacy

Thanks for the explanation @lightning_freak, @Sharlybg and @Dade , now it's much more clear to me! So, as in my job I have illumination design for the interiors, I can follow it creating some IES lamps according to the light fixture requested and using some realistic camera settings, at the end, the...
by pro
Tue Feb 26, 2019 2:37 pm
Forum: User Support
Topic: Understanding .ies parameters, efficacy
Replies: 19
Views: 9912

Understanding .ies parameters, efficacy

Hi! I'm using .ies file as a point light, and I would like to understand parameters related to .ies files available in Blender more in depth, especially the definition of Efficacy. In my experiements I'm using Irradiance AOV. As it's poined out in the LuxCore's docs (redirects to Wikipedia), the eff...
by pro
Tue Feb 19, 2019 10:27 am
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

It is a lot easier to start from the C++ code and leave the OpenCL code as next step. The CPU code is here: https://github.com/LuxCoreRender/LuxCore/blob/master/src/slg/engines/pathtracer.cpp Just looks for "irradiance" and you will find the 2 places (direct light + indirect light) where ...
by pro
Thu Feb 07, 2019 12:36 pm
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

It is a lot easier to start from the C++ code and leave the OpenCL code as next step. The CPU code is here: https://github.com/LuxCoreRender/LuxCore/blob/master/src/slg/engines/pathtracer.cpp Just looks for "irradiance" and you will find the 2 places (direct light + indirect light) where ...
by pro
Wed Feb 06, 2019 3:34 pm
Forum: User Support
Topic: Dumping all scene parameters + all objects from BlendLuxCore and use them in LuxCore
Replies: 2
Views: 2226

Re: Dumping all scene parameters + all objects from BlendLuxCore and use them in LuxCore

B.Y.O.B. wrote: Wed Feb 06, 2019 3:19 pm The filesaver engine was written for exactly this purpose.
You can enable it in the config settings.
For your purpose you should switch the mode from binary to text.
You will get PLY meshes, cfg and scn. The cfg file can be loaded into luxcoreui directly.
Thank you, that's great :D
by pro
Wed Feb 06, 2019 3:10 pm
Forum: User Support
Topic: Dumping all scene parameters + all objects from BlendLuxCore and use them in LuxCore
Replies: 2
Views: 2226

Dumping all scene parameters + all objects from BlendLuxCore and use them in LuxCore

Hi, I would like to dump all the necessary variables and scene objects from BlendLuxCore to recreate the same scene directly in LuxCore (I want to develop only C++ part but prototype scenes/camera positions inside Blender). I would need to automatically generate .cfg and .scn files with all necessar...
by pro
Wed Feb 06, 2019 7:11 am
Forum: User Support
Topic: Lux measurement using Irradiance feature
Replies: 31
Views: 31713

Re: Lux measurement using Irradiance feature

Yes, for instance irradiance on a probe is just: Average(<upper half pixel value> * Dot(<probe normal>, <pixel hemispherical direction>) / PI) Thank you for your reply! I would like to discuss another idea I was thining about recently, but I'm not sure if it's attainable. 1. Would it be possible to...