CompGeom

A computational geometry library using arbitrary-precision arithmetic where possible, written in Java.

How to build CompGeom

• if you have Ant installed, it's as easy as ant compile to compile all source files in the src/ directory. Or ant jar to compile all source files except the ones in the src/test/ directory and pack all compiled classes inside a JAR file.
• if Ant is not installed, I recommend importing the project in an IDE like Eclipse, NetBeans or IntelliJ IDEA and let the IDE compile the files, or create a JAR file of the compiled classes.

System Requirements

• JDK/JRE 1.6 or higher
• Ant (optional)

Usage

• see the src/main/compgeom/demos/Examples.java class for some examples how to use the various algorithms
• also see the API docs in the directory doc/api/
• when executing the CompGeom JAR file (java -jar CompGeom-x.y.z.jar), the DemosLauncher class is executed which prompts a graphical dialogue window that lets you choose a demo to run

Supported

• rational used for exact calculations
• geometric primitives (point, line segment, line, polygon, rectangle)
• Graham scan (convex hulls)
• rotating calipers to find the minimum bounding box of a convex hull
• closest pair of points
• Shamos-Hoey algorithm
• Bentley-Ottmann

Working on...

• Voronoi diagram
• Delaunay triangulation
• polygon triangulation