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154. By Chase Douglas on 2011-05-04

Remove pivot type configuration and add rotation center to gestures

Instead of providing a pivot type configuration, simply populate the
gesture values with the centroid, the transformation about the centroid,
and the instant center of rotation.

Also, remove drag values since they are equivalent to the translation
values of the 2D affine transformation matrix.

153. By Chase Douglas on 2011-04-27

As an example, tell grail to use the convex hull pivot confinement in
grail-transform.

152. By Chase Douglas on 2011-04-27

Use a red dot to denote the pivot point

The pivot point is also now drawn after the touches so it is visible when
on top of a touch point. Some drawing code was simplified by using
clear_screen.

151. By Chase Douglas on 2011-04-27

Make the pivot point determination configurable

* Remove moveness from grail_element
* Remove thresh_scale and thresh_drag from control
* Introduce a control for the pivot type
* Fix translation computation
* Fix grail_element_transform so it uses the pivot point
* Add new functionality for computing different pivot points
* Determine the drag value based on strictly on the centroid motion
  - This should fix grail 1 translation errors

150. By Henrik Rydberg on 2011-04-12

Update copyright information

The license information was always right, but the copyright information
for this particular project was never quite right. Corrected with this
patch. No functional changes.

Signed-off-by: Henrik Rydberg <email address hidden>

149. By Henrik Rydberg on 2011-04-12

Introduce the grail transform tool

This tool tests the transform capabilities of grail. Similar to a
map application, one can use a single finger, two fingers, a whole
hand or two hands to move the rectangle around, scale and rotate it.

Signed-off-by: Henrik Rydberg <email address hidden>

148. By Henrik Rydberg on 2011-04-12

Introduce test-mtdev

A new tool (test-mtdev) is added, showing the usage of gesture frames.

Signed-off-by: Henrik Rydberg <email address hidden>

147. By Henrik Rydberg on 2011-04-12

Add gesture transform unit tests

Start the gesture frame test suite with some basic coordinate
mapping tests.

Signed-off-by: Henrik Rydberg <email address hidden>

146. By Henrik Rydberg on 2011-04-12

Document the gesture frame logic

Add some notes on the math of the gesture frame computations.

Signed-off-by: Henrik Rydberg <email address hidden>

145. By Henrik Rydberg on 2011-04-12

Introduce gesture frames

This patch extends the API with parallel new/delete functions,
aiming to eventually replace the open/close function. The new
functions give access to the grail gesture frames, containing
gestural transform information. This information is useful in its
own right, and will eventually replace the internal recognizer.

Signed-off-by: Henrik Rydberg <email address hidden>