## Ray Casting Algorithm

If youâ€™ve been struggling with the problem of determining whether a point lies inside or outside a polygon, perhaps in google maps, read on. This post is specific to Android and Node.js but the algorithm can easily be implemented in any other language/platform as the algorithm itself is a piece of cake once understood.

## Voronoi: A solution to proximity based problems

In computational geometry, Voronoi diagram is a partitioning of a plane with n points into n convex polygons such that each polygon contains exactly one generating point and every point in a given polygon is closer to its generating point than to any other. A Voronoi diagram is sometimes also known as a Dirichlet tessellation. GeoVoronoi is an extension of Voronoi optimized for geo locations. To dive deeper into Voronoi geometry, read chapter seven of Computational Geometry: Algorithms and Applications. Or maybe play with this cool demo. If you’re working on any proximity-based problem, Voronoi diagram can be a lot of help. In layman’s language, Voronoi diagram…