[Bf-python] Python functions to call internal boolean operations

[Joe Eagar]

Frédéric COIFFIER wrote:
> This patch defines 3 functions to the Object API :
>  
>  > difference(Object) 
>  > union(Object) 
>  > intersection(Object)
>  
>  Thanks to these functions, I can write : 
>  
>  > newobject = sphere1.difference(box2)
>  
>  This patch was made against blender 2.41 source code.
>  Currently, the code doesn't check if the Object is a mesh. (As I'm really a 
> beginner with blender and the blender code, maybe this patch is dirty.)
>
> The patch can be found here :
> http://projects.blender.org/tracker/index.php?func=detail&aid=3928&group_id=9&atid=127
>   
checking an object type is as simple as checking the ->type field, for 
example 'if (ob->type==OB_MESH)" where ob is a Blender Object struct 
(not one of the bpy api ones).

you can find definitions of all this is 
source/blender/makesdna/DNA_object_types.h

joeedh