Geometric representations within the library are vectors, points, lines, arcs, circles, segments, triangles, rectangles, polygons, curved polygons, polygons with holes and curved polygons with holes.

Fully object-oriented design. Classes to represent collections of different geometric entities.

Abstract line based polygon class packed with functions. Add your own definition of a line to the code and you have a new type of polygon.

Calculation of minimum distance between geometric entities with closest points.

Intersections between all different geometric entities.

Bounding rectangle calculation for all.

Projections onto a line or a vector for all.

Basic transformations for all; movement, rotation, reflection in point, reflection in a line and grow.

All polygon types support intersection, union and difference with all other polygon types.

All polygon types support area, perimeter and centroid calculation.

Straight line polygon adds, automatic reordering of points to avoid crossing lines, collision avoidance, smoothing, morphing, convex hull, convex sub area creation and bounding circle.

Triangle class adds Circumcentre, Fermat point (Torricelli point) and InCentre.

The geodetic (lat long) position classes supports transformation to Cartesian co-ordinates through 24 different map projections as well as great circle distance, bearing and slant range..

All co-ordinates stored as double precision floating points for simplicity. Integer degenerate cases handled for polygon operations.

Easy to understand comments for every function and class.