Method and apparatus for interpreting multi-touch events
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United States of America Patent
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Jan 20, 2015
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Sep 2, 2011
filing date -
Sep 2, 2011
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Abstract
A method and apparatus for interpreting multi-touch events on a computing device comprising creating a reference coordinate system using first two touch points A and B on the device, creating a modified coordinate system using second two touch points C and D on the device, determining a reference origin point (O) for the reference coordinate system where a first angle is formed by the points AOB as a right angle and determining a modified origin point (O′) for the modified coordinate system where a second angle is formed by points CO′D as a right angle; and calculating a transformation matrix T between the reference coordinate system and the modified coordinate system.
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