CoreandServices.book - Ocean - Schlumberger

Geometry
LineDirection - This property gets the direction by which this line is defined.
Point3 p1 = new Point3(10,10,10);
Direction3 d1 = new Direction3(5,5,5);
Line3 l1 = new Line3(p1, d1);
Direction3 d = l1.LineDirection;
//d = {(5,5,5)}
The line classes define the public fields:
Null - The undefined line is defined by an undefined point and an undefined direction.
Line3 l1 = Line3.Null;
Line3 defines the following public operators:
- (minus) Operator – The minus operator returns a line with opposite direction.
Point3 p1 = new Point3(10,10,10);
Direction3 d1 = new Direction3(5,5,5);
Line3 l1 = new Line3(p1, d1);
//l1 is {5x+5y+5z+-150=0}
Direction3 d = l1.LineDirection;
//d = {(5,5,5)}
Line3 l2 = -l1;
//l2 is {-5x+-5y+-5z+150=0}
d = l2.LineDirection;
//d = {(-5,-5,-5)}
!= Operator – This operation compares two line instances for inequality. Two instances
are equal if their directions are both zero or if their directions are the same and their
offsets in their defining equations are the same. Note that comparing Line3.Null to any
other instance will return false. This is to maintain consistency with the behavior of
floating point NaN comparison.
bool result = (l1 != l2);
//result is true
4-176 Ocean Application Development Framework 2008.1
Schlumberger Private