Using pvlib.irradiance.get_total_irradiance() for Even-Span Roofs

[atzounis]

Hello, I am investigating the use of Pvlib in a tool to calculate the actual radiation entering a greenhouse. The challenges here are multiple but the first I come through is the following:
Let's take the simplest case of an even span roof of 30° inclination on each side and a specific orientation, which can be configured through the surface azimuth. I can use the pvlib.irradiance.get_total_irradiance() to calculate the radiation on one side of a roof. What I am trying to figure out is a way to calculate the direct solar radiation (poa_direct) on the other half of the roof. I am thinking of using the surface azimuth and combining it with the solar zenith of the given day so that I can calculate the proportion of the sun's trajectory that will face each side of the roof. I am not sure if that's right though and/or if there is a less complex way to do this.
Here is a link to a visualization of what I am trying to explain above.
Any idea would be highly appreciated. Thank you in advance for your thoughts.

[kandersolar]

I can use the pvlib.irradiance.get_total_irradiance() to calculate the radiation on one side of a roof. What I am trying to figure out is a way to calculate the direct solar radiation (poa_direct) on the other half of the roof.

Can't you simply do another call to get_total_irradiance() but using the orientation angles for the second roof plane? Note that get_total_irradiance returns both the total in-plane irradiance (poa_global) and its in-plane components (e.g. poa_direct).

[atzounis]

Thanks for your response. That could do the trick. Run 2 instances of get_total_irradiance() and keep only the positive values. Thanks! :)