Point4d Operators 
The Point4d type exposes the following members.
Name  Description  

Addition 
Sums two Point4d together.
 
Equality 
Determines whether two Point4d have equal values.
 
Inequality 
Determines whether two Point4d have different values.
 
Multiply(Point4d, Point4d) 
Multiplies two Point4d together, returning the dot (internal) product of the two.
This is not the cross product.
 
Multiply(Point4d, Double) 
Multiplies a point by a number.
 
Subtraction 
Subtracts the second point from the first point.
