A touch-operation-based dynamic geometry system: design and implementation. (English) Zbl 1434.68664

Su, Wei; Wang, Paul S.; Cai, Chuan; Li, Lian

Hong, Hoon (ed.) et al., Mathematical software – ICMS 2014. 4th international congress, Seoul, South Korea, August 5–9, 2014. Proceedings. Berlin: Springer. Lect. Notes Comput. Sci. 8592, 235-239 (2014).

Summary: GeometryTouch is a dynamic geometry software system with touch operation. Developed by JavaScript and SVG, GeometryTouch is a Web-based application which can run on browsers of mobile devices. When using GeometryTouch, users can draw geometric figures and create or modify geometry-based interactive manipulatives. A virtual cursor is designed to implement precise operations in GeometryTouch. Geometric operations consist of 4 continuous actions and it is a challenge to implement the action of “the first point confirming”. Three methods have been investigated to tackle the problem in the paper.
For the entire collection see [Zbl 1293.65003].

MSC:

68V35	Digital mathematics libraries and repositories
68U05	Computer graphics; computational geometry (digital and algorithmic aspects)

Software:

Cabri-geometry; JavaScript; GeometryEditor; Cinderella; Kig; Geometer's Sketchpad; GeometryTouch; GeoGebra; KSEG