public void RecalculatePointNumber()
{
string symbolName = dropDownList.options[dropDownList.value].text;
MhGesture gest = MhGestureManager.FindGesture(symbolName);
var interpolatedPointArray = MhPointPatternMath.GetInterpolatedPointArray(gest.points, (int)recalculatePointNumber.value, gest);
gest.points = new List <Vector2>(interpolatedPointArray);
ClearSymbol();
DrawSymbol();
}
/// <summary>
/// Compares a points of a single gesture, to the points in a single saved gesture, and returns a accuracy probability.
/// </summary>
/// <param name="compareTo">Learned PointPattern from PointPatternSet to compare gesture points to.</param>
/// <param name="points">Points of the current gesture being analyzed.</param>
/// <returns>Returns the accuracy probability of the learned PointPattern to the current gesture.</returns>
public MhPointPatternMatchResult GetPointPatternMatchResult(MhGesture compareTo, List <Vector2> points, int interpolationPoints)
{
// Ensure we have at least 2 points or recognition will fail as we are unable to interpolate between a single point.
if (points.Count < 2 && interpolationPoints < 2)
{
throw new ArgumentOutOfRangeException("To few points or small inperpolation points");
}
// We'll use an array of doubles that matches the number of interpolation points to hold
// the dot products of each angle comparison.
var dotProducts = new List <float>(interpolationPoints + 1);
// We'll need to interpolate the incoming points array and the points of the learned gesture.
// We do this for each comparison so that we can change the precision at any time and not lose
// or original learned gesture to multiple interpolations.
var interpolatedCompareTo = MhPointPatternMath.GetInterpolatedPointArray(compareTo.Points, interpolationPoints, compareTo);
var interpolatedPointArray = MhPointPatternMath.GetInterpolatedPointArray(points, interpolationPoints, null);
// Next we'll get an array of angles for each interpolated point in the learned and current gesture.
// We'll get the same number of angles corresponding to the total number of interpolated points.
var anglesCompareTo = MhPointPatternMath.GetPointArrayAngles(interpolatedCompareTo);
var angles = MhPointPatternMath.GetPointArrayAngles(interpolatedPointArray);
// Now that we have angles for each gesture, we'll get the dot product of every angle equal to
// the total number of interpolation points.
for (var i = 0; i <= anglesCompareTo.Length - 1; i++)
{
dotProducts.Add(MhPointPatternMath.GetDotProduct(anglesCompareTo[i], angles[i]));
}
//
// Convert average dot product to probability since we're using the deviation
// of the average of the dot products of every interpolated point in a gesture.
var probability = MhPointPatternMath.GetProbabilityFromDotProduct(dotProducts.Average());
//first 5th percent and last 5th percent is more important
for (var i = 0; i <= (anglesCompareTo.Length / 20.0) - 1; i++)
{
dotProducts.Add(MhPointPatternMath.GetDotProduct(anglesCompareTo[i], angles[i]));
}
//last 5th percent
for (int i = (int)((anglesCompareTo.Length / 100.0) * 95.0 - 1); i <= anglesCompareTo.Length - 1; i++)
{
dotProducts.Add(MhPointPatternMath.GetDotProduct(anglesCompareTo[i], angles[i]));
}
var probabilityAlt = MhPointPatternMath.GetProbabilityFromDotProduct(dotProducts.Average());
// Return PointPatternMatchResult object that holds the results of comparison.
return(new MhPointPatternMatchResult(compareTo.Name, probability, 1));
}
