private double GetDistance(JointType t1, JointType t2, int time)
{
if (!HasSkeleton(time))
{
throw new ArgumentException("No Skeleton at this Index");
}
return(SkeletonMath.DistanceBetweenPoints(person.GetLastSkeleton(time).GetPosition(t1), person.GetLastSkeleton(time).GetPosition(t2)));
}
/// <summary>
/// Simply calculates the velocity of a joint. Takes two versions.</summary>
/// <param name="type">
/// The JointType to get velocity from.</param>
/// <param name="firstTime">
/// First index of the persons cached skeletons</param>
/// <param name="secondTime">
/// Second index of the persons cached skeletons</param>
/// <returns>
/// Returns the absolute velocity in meters</returns>
private double SimpleAbsoluteVelocity(JointType type, int firstTime, int secondTime)
{
if (!HasSkeleton(firstTime) || !HasSkeleton(secondTime))
{
throw new ArgumentException("No Skeleton at this Index");
}
return(SkeletonMath.DistanceBetweenPoints(person.GetLastSkeleton(firstTime).GetPosition(type), person.GetLastSkeleton(secondTime).GetPosition(type)) * 1000.0 / person.MillisBetweenFrames(1, 0));
}
/// <summary>
/// Median of the distance between two points
/// Median over 3
/// </summary>
/// <param name="t1">Joint 1</param>
/// <param name="t2">Joint 2</param>
/// <returns>Distance in Meters</returns>
public double GetDistanceMedian(JointType t1, JointType t2)
{
if (!HasSkeleton(2))
{
return(GetDistance(t1, t2));
}
return(SkeletonMath.Median(GetDistance(t1, t2), GetDistance(t1, t2, 1), GetDistance(t1, t2, 2)));
}
private SkeletonPoint SubstractedPointsAt(JointType steady, JointType moving, int time)
{
if (!HasSkeleton(time))
{
throw new ArgumentException("No Skeleton at this Index");
}
return(SkeletonMath.SubstractPoints(person.GetLastSkeleton(time).GetPosition(moving), person.GetLastSkeleton(time).GetPosition(steady)));
}
/// <summary>
/// The actual movement directions
/// High Tolerance
/// </summary>
/// <param name="type">Joint</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetAbsoluteMovement(JointType type)
{
if (!HasSkeleton(1))
{
return(new List <Direction> {
Direction.None
});
}
return(SkeletonMath.DirectionTo(person.GetLastSkeleton(1).GetPosition(type), person.CurrentSkeleton.GetPosition(type)));
}
/// <summary>
/// The actual direction of movement to a relative point
/// </summary>
/// <param name="steady">The reference joint</param>
/// <param name="moving">The joint for the direction</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetRelativeMovement(JointType steady, JointType moving)
{
if (!HasSkeleton(1))
{
return(new List <Direction> {
Direction.None
});
}
return(SkeletonMath.DirectionTo(SkeletonMath.SubstractPoints(person.GetLastSkeleton(1).GetPosition(moving), person.GetLastSkeleton(1).GetPosition(steady)),
SkeletonMath.SubstractPoints(person.CurrentSkeleton.GetPosition(moving), person.CurrentSkeleton.GetPosition(steady))));
}
/// <summary>
/// Get a joints absolute velocity. If theres not enough skeleton information,
/// precision is decreased automatically.</summary>
/// <param name="type">
/// The JointType to get velocity from.</param>
/// <returns>
/// Returns the absolute velocity in meters</returns>
public double GetAbsoluteVelocity(JointType type)
{
if (!HasSkeleton(1))
{
return(0);
}
if (!HasSkeleton(3))
{
return(SimpleAbsoluteVelocity(type, 0, 1));
}
return(SkeletonMath.Median(SimpleAbsoluteVelocity(type, 0, 1), SimpleAbsoluteVelocity(type, 1, 2), SimpleAbsoluteVelocity(type, 2, 3)));
}
/// <summary>
/// The relative position over a timespawn
/// Low tolerance, but the position has to be constant
/// </summary>
/// <param name="from">Source of the direction</param>
/// <param name="to">target of the direction</param>
/// <param name="duration">Timespawn in frames</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetSteadyPosition(JointType from, JointType to, int duration)
{
List <SkeletonPoint> origin = new List <SkeletonPoint>(), target = new List <SkeletonPoint>();
if (duration < 0)
{
throw new ArgumentException("Duration must be at least 1");
}
for (int i = 0; i <= duration && HasSkeleton(i); i++)
{
target.Add(person.GetLastSkeleton(i).GetPosition(to));
origin.Add(person.GetLastSkeleton(i).GetPosition(from));
}
return(SkeletonMath.SteadyDirectionTo(origin, target));
}
/// <summary>
/// Relative movement over a timespawn
/// Low tolerance, but movement has to be constant
/// </summary>
/// <param name="steady">The reference joint</param>
/// <param name="moving">The joint to get the direction from</param>
/// <param name="duration">Timespawn in frames</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetSteadyRelativeMovement(JointType steady, JointType moving, int duration)
{
List <SkeletonPoint> from = new List <SkeletonPoint>(), to = new List <SkeletonPoint>();
if (duration < 1)
{
throw new ArgumentException("Duration must be at least 1");
}
for (int i = 0; i < duration && HasSkeleton(i); i++)
{
to.Add(SkeletonMath.SubstractPoints(person.GetLastSkeleton(i).GetPosition(moving), person.GetLastSkeleton(i).GetPosition(steady)));
from.Add(SkeletonMath.SubstractPoints(person.GetLastSkeleton(i + 1).GetPosition(moving), person.GetLastSkeleton(i + 1).GetPosition(steady)));
}
return(SkeletonMath.SteadyDirectionTo(from, to));
}
/// <summary>
/// Direction of a joint over a span of frames
/// Low tolerance, but movement has to be constant
/// </summary>
/// <param name="type">the joint</param>
/// <param name="duration">number of frames</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetSteadyAbsoluteMovement(JointType type, int duration)
{
List <SkeletonPoint> from = new List <SkeletonPoint>(), to = new List <SkeletonPoint>();
if (duration < 1)
{
throw new ArgumentException("Duration must be at least 1");
}
for (int i = 0; i < duration && HasSkeleton(i); i++)
{
to.Add(person.GetLastSkeleton(i).GetPosition(type));
from.Add(person.GetLastSkeleton(i + 1).GetPosition(type));
}
return(SkeletonMath.SteadyDirectionTo(from, to));
}
/// <summary>
/// Calculates the relative velocity of a joint referencing to a second one.</summary>
/// <param name="steady">
/// The referenctial JointType.</param>
/// <param name="moving">
/// The moving JointType of interest</param>
/// <returns>
/// Returns the relative velocity in meters</returns>
public double GetRelativeVelocity(JointType steady, JointType moving)
{
if (!HasSkeleton(1))
{
return(0);
}
SkeletonPoint d0 = SubstractedPointsAt(steady, moving, 0);
SkeletonPoint d1 = SubstractedPointsAt(steady, moving, 1);
if (!HasSkeleton(3))
{
return(SkeletonMath.DistanceBetweenPoints(d0, d1) * 1000.0 / person.MillisBetweenFrames(1, 0));
}
SkeletonPoint d2 = SubstractedPointsAt(steady, moving, 2);
SkeletonPoint d3 = SubstractedPointsAt(steady, moving, 3);
return(SkeletonMath.Median(
SkeletonMath.DistanceBetweenPoints(d0, d1) * 1000.0 / person.MillisBetweenFrames(1, 0),
SkeletonMath.DistanceBetweenPoints(d1, d2) * 1000.0 / person.MillisBetweenFrames(2, 1),
SkeletonMath.DistanceBetweenPoints(d2, d3) * 1000.0 / person.MillisBetweenFrames(3, 2)
));
}
/// <summary>
/// The static position of a joint in relation to another
/// </summary>
/// <param name="from">source of the direction</param>
/// <param name="to">target of the direction</param>
/// <returns>Enumerable of the directions</returns>
public IEnumerable <Direction> GetRelativePosition(JointType from, JointType to)
{
return(SkeletonMath.DirectionTo(person.CurrentSkeleton.GetPosition(from), person.CurrentSkeleton.GetPosition(to)));
}
