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See the table below for our open-source software offerings. 

For the most current listing of NLR-developed open-source software, see U.S. Department of Energy Office of Scientific and Technical Information's DOE CODE database.

Commercial Licensing

Explore more than 250 copyrighted software tools available for licensing via the Department of Energy's Lab Partnering Service.


View3D

Sep 6, 2018, 18:00 PM
This is a C program for the computation of geometric view factors. This version of View3D is included as part of the EnergyPlus installer package. The program uses a number of integration techniques to compute view factors between planar triangles or quadrilaterals in three dimensions.
Title : View3D
Url : https://github.com/NREL/View3D-3.2
Software Id : 20899
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Last Updated Dec. 4, 2025