bigunionelbow - a function that uses points to select 3 objects and specifies two radii to create an elbow by joining the three pieces to create a single object.
bigunionelbow(p1,p2,p3,R1,R2) :=
bigunion - This is found at the beginning or middle of a line of AutoCAD code.
bigunion(p1,p2,p3,p4) :=
bigunionA - This is found at the end of a line of AutoCAD code.
bigunionA(p1,p2,p3,p4) :=