# Xah Math Blog Archive 2013-08 to 2013-08

### Projective Geometry Java Applets

Some old projective geometry interactive applets. Requires Java installed.

The main file is Intro to Real Projective Plane

following are Java applets.

- Projective Geometry: Quadrangle 2.4a
- Projective Geometry: Quadrangle Construction
- Projective Geometry: Definition of Quadrilateral
- Projective Geometry: Desargues's Theorem
- Projective Geometry: Harmonic Points Construction
- Projective Geometry: Harmonic Points
- Projective Geometry: Perspective Triangles

Rewriting them in JavaScript soon.

A great blog from a architect. Always lots of most beautiful math images. Be sure to checkout his past articles. [• eat-a-bug: Art, Design, Architecture, and Technology By Lorenz Lachauer. At http://eat-a-bug.blogspot.com/ , Accessed on 2013-08-20 ]

JavaScript D3 Rotating Voronoi Demo

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