Overhangs determined by angle instead of length
I am using DesignBuilder to do a parametric analysis of a new building. One of the objects is different WWR vs overhangs. Since there are many other variables to investigate parametrically I want to minimise the use of different lengths. Therefor I want to be able to set my overhang length always in such a way it has an angle of 45 degrees taken from the bottom of the window. Right now I can only set the length of the overhang, or give preference for how my WWR is modeled and try to figure it out from there, but this does not always guarantee that it will have the height (and therefor overhang length) that I expect.
Is it possible to set the overhang length on an angle from the bottom of the window instead of a length? Does it require some sort of scripting or is it not possible in DB / E+?