public BackArea(KinectSensor kinectSensor, IReadOnlyDictionary <JointType, Joint> joints)
{
var leftShoulder = joints[JointType.ShoulderLeft].Position;
var rightShoulder = joints[JointType.ShoulderRight].Position;
var spineBase = joints[JointType.SpineBase].Position;
var spineShoulder = joints[JointType.SpineShoulder].Position;
var neck = joints[JointType.Head].Position;
var backPoints2D = new DepthSpacePoint[5];
kinectSensor.CoordinateMapper.MapCameraPointsToDepthSpace(new CameraSpacePoint[5]
{
leftShoulder, rightShoulder, spineBase, spineShoulder, neck
}, backPoints2D);
leftShoulder2D = depthSpacePointToPoint(backPoints2D[0]);
rightShoulder2D = depthSpacePointToPoint(backPoints2D[1]);
spineBase2D = depthSpacePointToPoint(backPoints2D[2]);
spineShoulder2D = depthSpacePointToPoint(backPoints2D[3]);
neck2D = depthSpacePointToPoint(backPoints2D[4]);
var spineLine = Line2D.makeLine(spineBase2D, spineShoulder2D);
leftShoulderLine = spineLine.makeParalelLine(leftShoulder2D);
rightShoulderLine = spineLine.makeParalelLine(rightShoulder2D);
hipLine = spineLine.makePerpendicularLine(new Point(spineBase2D.X, spineBase2D.Y - 0.15 * (spineShoulder2D.Y - spineBase2D.Y)));
neckLine = spineLine.makePerpendicularLine(neck2D);
spineHipPosition = hipLine.GetPointPosition(spineShoulder2D);
spineNeckPosition = neckLine.GetPointPosition(spineShoulder2D);
}
public bool isPointInSpineArea(Point point)
{
leftShoulderRelativePosition = leftShoulderLine.GetPointPosition(point);
rightShoulderRelativePosition = rightShoulderLine.GetPointPosition(point);
hipRelativePosition = hipLine.GetPointPosition(point);
neckRelativePosition = neckLine.GetPointPosition(point);
var pointIsOnBack =
(leftShoulderRelativePosition == Line2D.PointPosition.Right || leftShoulderRelativePosition == Line2D.PointPosition.OnLine) &&
(rightShoulderRelativePosition == Line2D.PointPosition.Left || rightShoulderRelativePosition == Line2D.PointPosition.OnLine) &&
(hipRelativePosition == spineHipPosition || hipRelativePosition == Line2D.PointPosition.OnLine) &&
(neckRelativePosition == spineNeckPosition || neckRelativePosition == Line2D.PointPosition.OnLine);
return(pointIsOnBack);
}
