I'm going to model a simple room with a ceiling that has a cross section of cubic bezier curve, the room will be used for the purpose of daylihting analysis using Diva, additionally I'd like to use Galapagos to test a variety of the 4 control points that control the curve shape to get the best results ? do you have any ideas how to implement that?. I looked everywhere in how to code the bezier equation in grasshopper , but no luck. 

Please note I'm a beginner in Grasshopper