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Properly rotate full [-pi, +pi] orientation range if available

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The code currently in place assumes that orientation has a range
of [-pi/2, +pi/2] as may be found with a touch digitizer. However,
when used with a digitzer that can report the full [-pi, +pi] range
of orientations (e.g. a stylus) the calculations here are incorrect.

This patch checks if the post-rotation value is out of range for
the axis, and wraps it back around.

Change-Id: I03a22f7bf9526a5d995df1a18430d6dd24c6d6ee
This commit is contained in:
Jason Gerecke
2013-03-01 11:49:07 -08:00
parent c9e0cd2ac7
commit 70bca4cc8a
1 changed files with 8 additions and 4 deletions
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12
services/input/InputReader.cpp
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@@ -4170,20 +4170,24 @@ void TouchInputMapper::cookPointerData() {
x = float(in.y - mRawPointerAxes.y.minValue) * mYScale + mYTranslate;
y = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
orientation -= M_PI_2;
if (orientation < - M_PI_2) {
orientation += M_PI;
if (orientation < mOrientedRanges.orientation.min) {
orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
}
break;
case DISPLAY_ORIENTATION_180:
x = float(mRawPointerAxes.x.maxValue - in.x) * mXScale + mXTranslate;
y = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
orientation -= M_PI;
if (orientation < mOrientedRanges.orientation.min) {
orientation += (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
}
break;
case DISPLAY_ORIENTATION_270:
x = float(mRawPointerAxes.y.maxValue - in.y) * mYScale + mYTranslate;
y = float(in.x - mRawPointerAxes.x.minValue) * mXScale + mXTranslate;
orientation += M_PI_2;
if (orientation > M_PI_2) {
orientation -= M_PI;
if (orientation > mOrientedRanges.orientation.max) {
orientation -= (mOrientedRanges.orientation.max - mOrientedRanges.orientation.min);
}
break;
default: