This is an iOS implementation of the N Dollar Gesture Recognizer.
- Shape Editor - A java app for creating shapes and exporting them as JSON files
N Dollar Recognizer
Anthony, L. and Wobbrock, J.O. (2010). A lightweight multistroke recognizer for user interface prototypes. Proceedings of Graphics Interface (GI '10). Ottawa, Ontario (May 31-June 2, 2010). Toronto, Ontario: Canadian Information Processing Society, pp. 245-252.
A Glyph is a user-defined set of Strokes, which are in turn just an array of points. When a Glyph is initialized, it first permutes through all the possible combinations of Stroke directions/order necessary to recreate itself. It also resamples and resizes itslef into a bounding box. Finally, a Glyph creates unistrokes (Templates) from all the calculated multistrokes.
The Detector collects user input (an array of points) and triggers a comparison of the input against all of the Glyph Templates. Each Template is given a score, and the Template with the highest score is considered the match. The Glyph that the Template belongs to is announced to the Delegate.
A Glyph can either be defined manually by defining its Strokes and initializing a Glyph with those Strokes. Or, a newly created Glyph can be fed user input and create itself when ready.
Copyright (c) 2011 Brit Gardner
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