Summary
A doubleprecision class encapsulating a straight line segment connecting two points.
Constructors
 Initialises a line segment using the specified start and end point. 
EdgeD(double x1, double y1, double x2, double y2)  Initialises a line segment using the start point (X1, Y1) and the end point (X2, Y2). 

Initialises a line segment starting at the specified point. The ending point is 1 unit away at the specified
angle. 
Instance methods
bool  
Returns true if the specified point lies exactly on this edge. Accurate results are not guaranteed on edges
which are not axisaligned. 
double  
Returns the Z component of the cross product of this edge, treated as a vector from EdgeD.Start to
EdgeD.End, with a vector from EdgeD.Start to the specified point. 
double  
Returns the Z component of the cross product of this edge, treated as a vector, with the specified edge, also
treated as a vector. 
double  
Calculates the distance between the specified point and the extended straight line identified by this edge. 
bool  
Compares two EdgeD ignoring direction: edges are considered equal as long as they have the same
endpoints. 
bool  
Compares two EdgeD objects for equality. 
int   Returns a hash code for the current EdgeD. 
bool  
Determines whether two edges intersect. 
double  
Calculates the projection of the specified point onto the line defined by this edge. Returns the Lambda of
this point P, defined by P = Start + Lambda * (End  Start). Hence the lambda is 0 if the projection falls
exactly onto the Start point, and 1 if it falls on the End point. 
PointD   Returns a point on this edge that is as near as possible to the specified point. 
string  
Provides a string representation of the current EdgeD. 
Operators
bool  
Compares two EdgeD ignoring direction: edges are considered equal as long as they have the same
endpoints. 
bool  
Instance properties
double   Returns the angle between the xaxis and this edge, in radians. 
double   Returns the angle between the xaxis and this edge, in degrees. 
double   Returns the difference in the Ycoordinates of the start and end point of this EdgeD. 
double   Returns the length of this edge (the distance between EdgeD.Start and EdgeD.End). 
PointD   Returns the point located halfway along this edge. 
double   Returns the difference in the Xcoordinates of the start and end point of this EdgeD. 
Instance fields
PointD   End point of the line segment. 
PointD   Start point of the line segment. 