CoreandServices.book - Ocean - Schlumberger

Geometry
Direction2 and Direction3 classes also expose the following static read only
public fields:
Null - The undefined direction has components that are all undefined.
Direction3.Null = (NaN,NaN,NaN)
Zero - Zero direction points in no direction (all components are 0).
Direction3 dir3 = Direction3.Zero;
// dir3 = (0, 0, 0)
The Direction2 and Direction3 classes provide the following public operators:
- (minus) Operator - This operation returns the instance in the opposite direction. This
multiplies the direction X, Y, and Z properties each by -1.
Direction3 dir1 = new Direction3(10, 20, 30);
Direction3 dir2 = -dir1;
// dir2 = (-10, -20, -30)
+ Operator – This operation adds a direction. The result returns the same instance.
Direction3 dir1 = new Direction3(10, 20, 30);
Direction3 dir3 = +dir1;
// dir3 = (10, 20, 30)
== Operator - Ths operation compares two direction objects for equality. Returns true if
the instances are equal. The objects are equal if the X, Y, Z, and NormalizedVector
properties of one match the corresponding property of the other.
• • • • • •
Note:
Comparing Direction3.Null to any other instance will return false. This
is to maintain consistency with the behavior of the floating point NaN
comparison.
Direction3 dir1 = new Direction3(10, 20, 30);
Direction3 dir2 = new Direction3(10, 20, 40);
bool result = (dir1 == dir2);
//result is false
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