/** Gets the scale */
public float getScale() {
if (mDetector.getCount() < 2) {
return 1;
} else {
float startDeltaX = mDetector.getStartX()[1] - mDetector.getStartX()[0];
float startDeltaY = mDetector.getStartY()[1] - mDetector.getStartY()[0];
float currentDeltaX = mDetector.getCurrentX()[1] - mDetector.getCurrentX()[0];
float currentDeltaY = mDetector.getCurrentY()[1] - mDetector.getCurrentY()[0];
float startDist = (float) Math.hypot(startDeltaX, startDeltaY);
float currentDist = (float) Math.hypot(currentDeltaX, currentDeltaY);
return currentDist / startDist;
}
}
/** Gets the rotation in radians */
public float getRotation() {
if (mDetector.getCount() < 2) {
return 0;
} else {
float startDeltaX = mDetector.getStartX()[1] - mDetector.getStartX()[0];
float startDeltaY = mDetector.getStartY()[1] - mDetector.getStartY()[0];
float currentDeltaX = mDetector.getCurrentX()[1] - mDetector.getCurrentX()[0];
float currentDeltaY = mDetector.getCurrentY()[1] - mDetector.getCurrentY()[0];
float startAngle = (float) Math.atan2(startDeltaY, startDeltaX);
float currentAngle = (float) Math.atan2(currentDeltaY, currentDeltaX);
return currentAngle - startAngle;
}
}
/** Gets the Y component of the translation */
public float getTranslationY() {
return calcAverage(mDetector.getCurrentY(), mDetector.getCount())
- calcAverage(mDetector.getStartY(), mDetector.getCount());
}