docs: private void extractCurrPtInfo() {
  		// Get new drag/pinch params. Only read multitouch fields that are needed,
  		// to avoid unnecessary computation (diameter and angle are expensive operations).
  		mCurrPtX = mCurrPt.getX();
  		mCurrPtY = mCurrPt.getY();
  		mCurrPtDiam = Math.max(MIN_MULTITOUCH_SEPARATION * .71f, !mCurrXform.updateScale ? 0.0f : mCurrPt.getMultiTouchDiameter());
  		mCurrPtWidth = Math.max(MIN_MULTITOUCH_SEPARATION, !mCurrXform.updateScaleXY ? 0.0f : mCurrPt.getMultiTouchWidth());
  		mCurrPtHeight = Math.max(MIN_MULTITOUCH_SEPARATION, !mCurrXform.updateScaleXY ? 0.0f : mCurrPt.getMultiTouchHeight());
  		mCurrPtAng = !mCurrXform.updateAngle ? 0.0f : mCurrPt.getMultiTouchAngle();
  	}