/// <summary>
/// Retruns the height of the specified body.
/// </summary>
/// <param name="body">The specified user body.</param>
/// <returns>The height of the body in meters.</returns>
public static double Height(this Body body)
{
const double HEAD_DIVERGENCE = 0.1;
var head = body.Joints[JointType.Head];
var neck = body.Joints[JointType.Neck];
var shoulders = body.Joints[JointType.SpineShoulder];
var spine = body.Joints[JointType.SpineMid];
var waist = body.Joints[JointType.SpineBase];
var hipLeft = body.Joints[JointType.HipLeft];
var hipRight = body.Joints[JointType.HipRight];
var kneeLeft = body.Joints[JointType.KneeLeft];
var kneeRight = body.Joints[JointType.KneeRight];
var ankleLeft = body.Joints[JointType.AnkleLeft];
var ankleRight = body.Joints[JointType.AnkleRight];
var footLeft = body.Joints[JointType.FootLeft];
var footRight = body.Joints[JointType.FootRight];
// Find which leg is tracked more accurately.
int legLeftTrackedJoints = JointExtensions.NumberOfTrackedJoints(hipLeft, kneeLeft, ankleLeft, footLeft);
int legRightTrackedJoints = JointExtensions.NumberOfTrackedJoints(hipRight, kneeRight, ankleRight, footRight);
double legLength = legLeftTrackedJoints > legRightTrackedJoints?JointExtensions.Distance(hipLeft, kneeLeft, ankleLeft, footLeft) : JointExtensions.Distance(hipRight, kneeRight, ankleRight, footRight);
return(JointExtensions.Distance(head, neck, shoulders, spine, waist) + legLength + HEAD_DIVERGENCE);
}
/// <summary>
/// Given a collection of joints, calculates the number of the joints that are tracked accurately.
/// </summary>
/// <param name="joints">A collection of joints.</param>
/// <returns>The number of the accurately tracked joints.</returns>
public static int NumberOfTrackedJoints(this Body body)
{
return(JointExtensions.NumberOfTrackedJoints(body.Joints.Values));
}