This is a grasshopper script/algorithm that creates a shade structure with base and cover. This is a base design that can be developed upon. 
 
-export/bake the resulting form/brep.
-view how the script was created
-explode cluster 
-double click cluster to view script and add more.
 
You can find a sample of an optimized script under the FREE RESOURCES tab
 
Refer to video and images for more information.