private bool IsClosedLoop(TouchPoint2 point)
{
double length = TrigonometricCalculationHelper.CalculatePathLength(point);
if (length < 50)
return false;
// Check the distance between start and end point
if (point.Stroke.StylusPoints.Count > 1)
{
StylusPoint firstPoint = point.Stroke.StylusPoints[0];
StylusPoint lastPoint = point.Stroke.StylusPoints[point.Stroke.StylusPoints.Count - 1];
double distance = TrigonometricCalculationHelper.GetDistanceBetweenPoints(firstPoint, lastPoint);
Correlation recognizer = new Correlation(point);
if (Math.Abs(recognizer.RSquared) < 0.1)
{
if (distance < threshHold)
{
return true;
}
}
}
return false;
}
private ValidSetOfTouchPoints ValidateLine(TouchPoint2 points)
{
ValidSetOfTouchPoints ret = new ValidSetOfTouchPoints();
Correlation recognizer = new Correlation(points);
if (Math.Abs(recognizer.RSquared) > .1)
{
ret.Add(points);
}
return ret;
}
private ValidSetOfTouchPoints ValidateBox(TouchPoint2 points)
{
ValidSetOfTouchPoints output = new ValidSetOfTouchPoints();
int length = points.Stroke.StylusPoints.Count;
if (length < 1)
{
return output;
}
List<string> slopes = new List<string>();
TouchPoint2 newPoints = points.GetEmptyCopy();
for (int i = 0; i < length - 1; i++)
{
var point1 = points.Stroke.StylusPoints[i];
var point2 = points.Stroke.StylusPoints[i + 1];
double slope = TrigonometricCalculationHelper.GetSlopeBetweenPoints(point1, point2);
double distance = TrigonometricCalculationHelper.GetDistanceBetweenPoints(point1, point2);
string stringSlope = TouchPointExtensions.SlopeToDirection(slope);
if (distance > 0)
{
newPoints.Stroke.StylusPoints.Add(point1);
Correlation recognizer = new Correlation(newPoints);
if (Math.Abs(recognizer.RSquared) < TOLERANCE + 0.15)
{
int linelength = newPoints.Stroke.StylusPoints.Count;
double lineSlope = TrigonometricCalculationHelper.GetSlopeBetweenPoints(newPoints.Stroke.StylusPoints[1],
newPoints.Stroke.StylusPoints[linelength - 1]);
string lineStringSlope = TouchPointExtensions.SlopeToDirection(lineSlope);
slopes.Add(lineStringSlope);
newPoints = newPoints.GetEmptyCopy();
}
}
}
RectangleParser parser = new RectangleParser();
bool hasRect = parser.Advance(slopes);
if (hasRect)
{
output.Add(points);
}
return output;
}