Creating a coordinate system by specifying two previously defined lines.
$$
$$ Declarations
$$
ENTITY/LN1,LN2,CSYS1
$$
$$ Geometry Definition
$$
LN1 =LINE/-1,-1,1,1
LN2 =LINE/-1,1,-.5,0
$$
$$ Coordinate System Definition
$$
CSYS1=CSYS/LN1,LN2
Coordinate System Defined by Two Lines