mlib::Border Class Reference

Representation of a simple, non-intersecting polygon that partitions the 2D space in two regions. More...

Public Member Functions
	Border ()
	Create an empty border object.
	Border (const char *fname)
	Load a border object from a text file.
void	add (double x, double y)
void	close (double x, double y)
bool	inside (double x, double y)
	Check if a point is inside the border.

Detailed Description

Representation of a simple, non-intersecting polygon that partitions the 2D space in two regions.

The polygon is represented by its vertexes and it is always assumed that there is a segment joining the last point with the first point. A Border object can be stored in a text file where each line represents a vertex. The last vertex defines what is considered the "inside" of the polygon: if the point lays inside the polygon, it is an "island" border. If the last point is outside the polygon, it is a "hole" border.

Member Function Documentation

inside()

bool mlib::Border::inside	(	double	x,
		double	y
	)

Check if a point is inside the border.

Parameters

x	- X coordinate of the point
y	- Y coordinate of the point

Returns

true if point is inside the border

Algorithm adapted from W. Randolph Franklin wrf@e.nosp@m.cse..nosp@m.rpi.e.nosp@m.du http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html

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The documentation for this class was generated from the following files:

• include/mlib/border.h
• src/geom/border.cpp