Modelling longwave radiation

Hi to Ladybug community,

I’m looking for an equation, python script, component, or any simulation tool that calculate the exact amount of longwave radiation of a complex surface of a wall on a human body in outdoor.
To make it clear I need that equation take the human body as an object made of several surfaces attached to each other and all the wall components which have centimeters dimensions as distinct surfaces.
then I wanna calculate the heat map of each these surfaces of wall to meet the exact number of longwave emittance of them.
and after that I wanna see which surfaces of human body absorb longwave radiations emitted from described wall and how much of these radiation would be absorbed based on the distance and position of the human body?

I will appreciate your time and help.