private void Foot_FootDownDetected(Foot foot)
{
if (footDown == true)
{
ALsetup.SLvarygain((float)(1/((Math.Abs(foot.CurrentMarker.xCoordinate) / 10)+0.05f)));
ALsetup.SLPlayWAV();
}
}
public ALSoundEnvironment(TestSubject person)
{
this.person = person;
left = person.Left;
right = person.Right;
ALsetup.SLsetenvironment();
//if (!ALsetup.SLsetenvironment())
//{
// MessageBox.Show("Sound is not fully functioning!");
//}
StartSound();
}
private void Foot_FootDownDetected(Foot foot)
{
if (eventcount++ > 2) //ignore initial events to allow for treadmill speed up etc
{
if (foot.FootName == "left")
{
if (rightFlag == true)
{
rightFlag = false;
leftFlag = true;
outfile.Write(storedRight.xCoordinate.ToString() + "," + foot.CurrentMarker.xCoordinate.ToString() + "\n");
}
else
{
leftFlag = true;
storedLeft = new Marker(foot.CurrentMarker);
}
}
else
{
leftFlag = false;
}
if (foot.FootName == "right")
{
if (leftFlag == true)
{
leftFlag = false;
rightFlag = true;
outfile.Write(foot.CurrentMarker.xCoordinate.ToString() + "," + storedLeft.xCoordinate.ToString() + "\n");
}
else
{
rightFlag = true;
storedRight = new Marker(foot.CurrentMarker);
}
}
else
{
rightFlag = false;
}
//debug output
Console.WriteLine(foot.FootName + "Down " + foot.CurrentMarker.MarkerId.ToString() + " x" + foot.CurrentMarker.xCoordinate.ToString()
+ " y" + foot.CurrentMarker.yCoordinate.ToString() + " z" + foot.CurrentMarker.zCoordinate.ToString() + " NP" + foot.NearestPosition.ToString() + "\n");
sound.Play();
}
}
public TestSubject(string name, string subjectID, string gender, uint age, Calibration cal)
{
this.calibration = cal;
this.age = age;
this.name = name;
this.gender = gender;
this.subjectID = subjectID;
if (calibration.LeftFoot_Marker != null)
{
left = new Foot("left", calibration.LeftFoot_Marker);
right = new Foot("right", calibration.RightFoot_Marker);
}
else
{
left = new Foot("left", calibration.LeftFoot_Trackable);
right = new Foot("right", calibration.RightFoot_Trackable);
}
}
public TightropeData(StreamWriter file, Calibration markerHeightCal)
{
outfile = file;
outfile.Write("Right, Left\n");
left = new Foot("left", markerHeightCal.LeftFoot);
right = new Foot("right", markerHeightCal.RightFoot);
sound = new SoundPlayer(@"D:/Test/Conga2.wav");
sound.Load();
Foot.FootDownDetected += new Foot.FootDownEventHandler(Foot_FootDownDetected);
//debug output
Console.WriteLine("Start Left:" + " x" + ((int)markerHeightCal.LeftFoot.xCoordinate).ToString() + " y" +
((int)markerHeightCal.LeftFoot.yCoordinate).ToString() + " z" + ((int)markerHeightCal.LeftFoot.zCoordinate).ToString());
Console.WriteLine("Start Right:" + " x" + ((int)markerHeightCal.RightFoot.xCoordinate).ToString() + " y" +
((int)markerHeightCal.RightFoot.yCoordinate).ToString() + " z" + ((int)markerHeightCal.RightFoot.zCoordinate).ToString() + "\n");
}
//Calibration calibration = null;
public TestSubject(string ID)
{
//this.calibration = cal;
this.personData = new PersonData();
this.personData.PersonID = ID;
try
{
//if (calibration.LeftFoot_Marker != null)
//{
left = new Foot("left");
right = new Foot("right");
//}
//else
//{
// left = new Foot("left");
// right = new Foot("right");
//}
}
catch (System.Net.Sockets.SocketException)
{
MessageBox.Show("Problem with connecting to the server. (Accessing calibration file in TestSubject.cs)");
}
}
//Calibration calibration = null;
public TestSubject(string ID)
{
//this.calibration = cal;
this.personData = new PersonData();
this.personData.PersonID = ID;
try
{
//if (calibration.LeftFoot_Marker != null)
//{
left = new Foot("left");
right = new Foot("right");
//}
//else
//{
// left = new Foot("left");
// right = new Foot("right");
//}
}
catch (System.Net.Sockets.SocketException)
{
MessageBox.Show("Problem with connecting to the server. (Accessing calibration file in TestSubject.cs)");
}
}
public TightropeData(TestSubject subject, string testname, int testnumber)
{
this.fileID = testname + subject.SubjectID + testnumber.ToString();
Xfile = new StreamWriter(@"D:Test/" + fileID + "Accuracy.csv", false);
Xfile.Write("Right, Left\n");
left = subject.Left;
right = subject.Right;
LSS = new double[5];
LCD = new double[4];
LSI = new double[4];
LDS = new double[4];
RSS = new double[5];
RCD = new double[4];
RSI = new double[4];
RDS = new double[4];
LSSlist = new List <double>();
LCDlist = new List <double>();
LSIlist = new List <double>();
LDSlist = new List <double>();
RSSlist = new List <double>();
RCDlist = new List <double>();
RSIlist = new List <double>();
RDSlist = new List <double>();
sound = new SoundPlayer(@"D:/Test/Conga2.wav");
sound.Load();
Foot.FootDownDetected += new Foot.FootDownEventHandler(Foot_FootDownDetected);
Foot.zFootPeakDetected += new Foot.Z_PeakEventHandler(Foot_zFootPeakDetected);
//debug output - feet calibration positions
Console.WriteLine("Start Left:" + " x" + ((int)left.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)left.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)left.CalibrationMarker.zCoordinate).ToString());
Console.WriteLine("Start Right:" + " x" + ((int)right.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)right.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)right.CalibrationMarker.zCoordinate).ToString() + "\n");
}
public TightropeData(TestSubject subject, string testname, int testnumber)
{
this.fileID = testname+ subject.SubjectID + testnumber.ToString();
Xfile = new StreamWriter(@"D:Test/" + fileID + "Accuracy.csv", false);
Xfile.Write("Right, Left\n");
left = subject.Left;
right = subject.Right;
LSS = new double[5];
LCD = new double[4];
LSI = new double[4];
LDS = new double[4];
RSS = new double[5];
RCD = new double[4];
RSI = new double[4];
RDS = new double[4];
LSSlist = new List<double>();
LCDlist = new List<double>();
LSIlist = new List<double>();
LDSlist = new List<double>();
RSSlist = new List<double>();
RCDlist = new List<double>();
RSIlist = new List<double>();
RDSlist = new List<double>();
sound = new SoundPlayer(@"D:/Test/Conga2.wav");
sound.Load();
Foot.FootDownDetected += new Foot.FootDownEventHandler(Foot_FootDownDetected);
Foot.zFootPeakDetected += new Foot.Z_PeakEventHandler(Foot_zFootPeakDetected);
//debug output - feet calibration positions
Console.WriteLine("Start Left:" + " x" + ((int)left.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)left.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)left.CalibrationMarker.zCoordinate).ToString());
Console.WriteLine("Start Right:" + " x" + ((int)right.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)right.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)right.CalibrationMarker.zCoordinate).ToString() + "\n");
}
private int CycleState(Foot foot)
{
if (foot1 == null)
{
if (foot.ZDirection == 1)
{
foot1 = foot.FootName;
System.Diagnostics.Debug.WriteLine("\n\nAt start of new cycle. Foot1 = " + foot1 + " Marker:" + foot.CurrentMarker.MarkerId);
}
if (foot1 == "left")
{
foot2 = "right";
}
if (foot1 == "right")
{
foot2 = "left";
}
}
int state = 0;
if (foot1 != null)
{
if ((foot.FootName == foot1) && (foot.ZDirection == 1))
{
state = 1;
stridestart = foot.CurrentMarker.zCoordinate;
}
if ((foot.FootName == foot1) && (foot.ZDirection == -1))
{
state = 2;
}
if ((foot.FootName == foot2) && (foot.ZDirection == 1))
{
state = 3;
}
if ((foot.FootName == foot2) && (foot.ZDirection == -1))
{
state = 4;
stridelength = foot.CurrentMarker.zCoordinate - stridestart;
stridestart = 0;
}
}
return state;
}
private void Foot_zFootPeakDetected(Foot foot)
{
if (startcount == 3)//wait for 2 events before starting cycling
{
int currentstate = CycleState(foot);
if (currentstate != 0)
{
//if (teststart == 0) teststart = foot.CurrentMarker.TimeStamp; //save time at start
if (currentstate != ((cyclestate % 4) + 1))
{
//regular stride sequence interrupted
//reset state table and cyclestate to initiate new stride sequence
cyclestate = 0;
tablepointer = 0;
stridestart = 0;
foot1 = null;
foot2 = null;
}
else
{
//process state table - add event and time, calc SI if 2nd block etc
float SIfoot1;
float SIfoot2;
cyclestate = currentstate;
statetable[tablepointer] = foot.CurrentMarker.TimeStamp - teststart;
System.Diagnostics.Debug.WriteLine("Cyclestate:" + cyclestate + " Foot event:" + foot.FootName + "(" + foot.ZDirection + ")" + statetable[tablepointer] + " Tablepointer:" + tablepointer);
switch (tablepointer)
{
case 4:
SIfoot1 = statetable[2] - statetable[1];
SIfoot2 = statetable[4] - statetable[3];
DSSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 5:
SIfoot1 = statetable[3] - statetable[1];
SIfoot2 = statetable[5] - statetable[3];
SISI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 6:
SIfoot1 = (float)((float)(statetable[1] - statetable[0]) / (float)(statetable[4] - statetable[1]));
SIfoot2 = (float)((float)(statetable[3] - statetable[2]) / (float)(statetable[6] - statetable[3]));
SSSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 7:
SIfoot1 = statetable[5] - statetable[1];
SIfoot2 = statetable[7] - statetable[3];
CDSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
//shift statetable block2 -> block1 [2nd stride of previous becomes 1st stride of next]
statetable[0] = statetable[4];
statetable[1] = statetable[5];
statetable[2] = statetable[6];
statetable[3] = statetable[7];
tablepointer = 3;
System.Diagnostics.Debug.WriteLine("\n");
break;
default:
break;
}
tablepointer++;
}
}
}
else
{
startcount++;
}
}
/*#region Foot overshoot
private void Foot_xFootPeakDetected(Foot foot)
{
if (Foot.Frontfoot != null)
{
if (foot.FootName == Foot.Frontfoot.FootName)
{
if (foot.CurrentMarker.yCoordinate > foot.FootDown_yThreshold + 5)
{
PositionData accuracyData = new PositionData();
if ((foot.FootName == "left") && (foot.CurrentMarker.xCoordinate > 0))
{
accuracyData.XCoordinate = foot.CurrentMarker.xCoordinate;
accuracyData.Time = foot.CurrentMarker.TimeStamp - teststart;
LeftOvershootList.Add(accuracyData);
System.Diagnostics.Debug.WriteLine("Left foot overshoot:" + accuracyData.XCoordinate);
}
if ((foot.FootName == "right") && (foot.CurrentMarker.xCoordinate < 0))
{
accuracyData.XCoordinate = foot.CurrentMarker.xCoordinate;
accuracyData.Time = foot.CurrentMarker.TimeStamp - teststart;
RightOvershootList.Add(accuracyData);
System.Diagnostics.Debug.WriteLine("Right foot overshoot:" + accuracyData.XCoordinate);
}
}
}
}
}
#endregion*/
#region Foot down accuracy
private void Foot_FootDownDetected(Foot foot)
{
if (footdownevents++ > 2)//number of events to miss before recording data
{
//if (teststart == 0) teststart = foot.CurrentMarker.TimeStamp; //save time at start
PositionData accuracyData = new PositionData();
accuracyData.XCoordinate = foot.CurrentMarker.xCoordinate;
accuracyData.Time = foot.CurrentMarker.TimeStamp - teststart;
System.Diagnostics.Debug.WriteLine(foot.FootName + "Down" + " Y:" + foot.CurrentMarker.yCoordinate + "(" + foot.FootDown_yThreshold + ")" + " Position:" + accuracyData.XCoordinate + " Time:" + accuracyData.Time);
if (foot.FootName == "left") LeftList.Add(accuracyData);
if (foot.FootName == "right") RightList.Add(accuracyData);
}
}
/*
int LSSstate = 0;//cycle stage counters for each of the symmetry variables
int LCDstate = 0;
int LSIstate = 0;
int LDSstate = 0;
int RSSstate = 0;
int RCDstate = 0;
int RSIstate = 0;
int RDSstate = 0;
double sssi = 0;
double cdsi = 0;
double sisi = 0;
double dssi = 0;
double[] LSS, LCD, LSI, LDS;
double[] RSS, RCD, RSI, RDS;
List<double> LSSlist;
List<double> LCDlist;
List<double> LSIlist;
List<double> LDSlist;
List<double> RSSlist;
List<double> RCDlist;
List<double> RSIlist;
List<double> RDSlist;
*/
#endregion
public TightropeData(TestSubject subject, string fileID, int startTime)
{
this.fileID = fileID;
left = subject.Left;
right = subject.Right;
DSSI = new List<SIdata>();
SISI = new List<SIdata>();
CDSI = new List<SIdata>();
SSSI = new List<SIdata>();
LeftList = new List<PositionData>();
RightList = new List<PositionData>();
LeftOvershootList = new List<PositionData>();
RightOvershootList = new List<PositionData>();
statetable = new int[8];
teststart = startTime;
LTO = new List<float>();
LHD = new List<float>();
RTO = new List<float>();
RHD = new List<float>();
#region Asynchronous arrays and lists
/*
LSS = new double[5];
LCD = new double[4];
LSI = new double[4];
LDS = new double[4];
RSS = new double[5];
RCD = new double[4];
RSI = new double[4];
RDS = new double[4];
LSSlist = new List<double>();
LCDlist = new List<double>();
LSIlist = new List<double>();
LDSlist = new List<double>();
RSSlist = new List<double>();
RCDlist = new List<double>();
RSIlist = new List<double>();
RDSlist = new List<double>();
*/
#endregion
Foot.FootDownDetected += new Foot.FootDownEventHandler(Foot_FootDownDetected);
Foot.zFootPeakDetected += new Foot.Z_PeakEventHandler(Foot_zFootPeakDetected);
//Foot.xFootPeakDetected += new Foot.X_PeakEventHandler(Foot_xFootPeakDetected);
//debug output - feet calibration positions
System.Diagnostics.Debug.WriteLine("Start Left" + left.CalibrationMarker.MarkerId + ": x" + ((int)left.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)left.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)left.CalibrationMarker.zCoordinate).ToString() + " Time: " + left.CalibrationMarker.TimeStamp.ToString());
System.Diagnostics.Debug.WriteLine("Start Right" + right.CalibrationMarker.MarkerId + ": x" + ((int)right.CalibrationMarker.xCoordinate).ToString() + " y" +
((int)right.CalibrationMarker.yCoordinate).ToString() + " z" + ((int)right.CalibrationMarker.zCoordinate).ToString() + "\n");
}
private void FrontFoot(Marker m1, Marker m2)
{
if (m1.zCoordinate >= m2.zCoordinate)
{
if (this.Equals(m1))
{
frontfoot = this;
}
}
else
{
if (this.Equals(m2))
{
frontfoot = this;
}
}
}
private void FrontFoot(Marker m1, Marker m2)
{
if (m1.zCoordinate >= m2.zCoordinate)
{
if (this.currentMarker.zCoordinate == m1.zCoordinate)
{
frontfoot = this;
}
}
else
{
if (this.currentMarker.zCoordinate == m2.zCoordinate)
{
frontfoot = this;
}
}
}
//can add asymmetry analysis (exisitng class will require a small rewrite) and an overshoot measure for x-peaks
private void Foot_zFootPeakDetected(Foot foot)
{
//sound.Play();
//first check sequence - if sequence broken, reset all variables
int currentstate = CycleState(foot);
if ((cyclestate == 0) || (currentstate != (cyclestate % 4) + 1))
{
cyclestate = currentstate;
//Re-set / re-initialise symmetry variables
LSSstate = 0;
LCDstate = 0;
LSIstate = 0;
LDSstate = 0;
RSSstate = 0;
RCDstate = 0;
RSIstate = 0;
RDSstate = 0;
}
else
{
cyclestate = (cyclestate % 4) + 1;
}
#region Notes on calculation of symmetry measures
//Update all symmetry variables affected by this gait event
//Gait cycle state:
// 1 = left toe off
// 2 = left heel down
// 3 = right toe off
// 4 = right heel down
//Some symmetry parameters require events from more than one strid
//Cyclestates followed by n (eg 2n) indicates an event from a subsequent stride
//When the correct gait events for a parameter have occurred, the result is summed
//and a count kept of the number of elements added (for post-calculation of the mean)
#endregion
Console.WriteLine("Cycle state: " + cyclestate.ToString());
switch (cyclestate)
{
case 1:
//Left swing stance -> 1, 2, 1n
LSS[LSSstate] = foot.CurrentMarker.TimeStamp;
if (LSSstate == 2)//if end of LSS cycle -> add result to summation
{
LSS[3] += ((LSS[1] - LSS[0]) / (LSS[2] - LSS[1]));
LSS[4]++;
LSSstate = 0;
LSSlist.Add((LSS[1] - LSS[0]) / (LSS[2] - LSS[1]));
}
else
{
LSSstate = 1;
}
//Right double support -> 4, 1n
//Double support calculation only requires 2 events (4, 1n) in that order
//If gait cycle event '1' is not received after an event '4', it can be ignored
//ie. it will not contribute to a valid calculation
if (RDSstate == 1)
{
RDS[2] += (foot.CurrentMarker.TimeStamp - RDS[0]);
RDS[3]++;
RDSstate = 0;
RDSlist.Add((foot.CurrentMarker.TimeStamp - RDS[0]));
}
break;
case 2:
//Left swing stance -> 1, 2, 1n
if (LSSstate == 1)
{
LSS[1] = foot.CurrentMarker.TimeStamp;
LSSstate = 2;
}
//Left cycle duration -> 2, 2n
//Any '2' event can be stored, only the 2nd will trigger a calculation
LCD[LCDstate] = foot.CurrentMarker.TimeStamp;
if (LCDstate == 1)
{
LCD[2] += (LCD[1] - LCD[0]);
LCD[3]++;
LCDstate = 0;
LCDlist.Add(LCD[1] - LCD[0]);
}
else
{
LCDstate = 1;
}
//Left step interval -> 2, 4
LSI[0] = foot.CurrentMarker.TimeStamp;
LSIstate = 1;
//Right step interval -> 4, 2n
if (RSIstate == 1)
{
RSI[2] += (foot.CurrentMarker.TimeStamp - RSI[0]);
RSI[3]++;
RSIstate = 0;
RSIlist.Add(foot.CurrentMarker.TimeStamp - RSI[0]);
}
//Left double support -> 2, 3
LDS[0] = foot.CurrentMarker.TimeStamp;
LDSstate = 1;
break;
case 3:
//Right swing stance -> 3, 4, 3n
RSS[RSSstate] = foot.CurrentMarker.TimeStamp;
if (RSSstate == 2)
{
RSS[3] += ((RSS[1] - RSS[0]) / (RSS[2] - RSS[1]));
RSS[4]++;
RSSstate = 0;
RSSlist.Add((RSS[1] - RSS[0]) / (RSS[2] - RSS[1]));
}
else
{
RSSstate = 1;
}
//Left double support -> 2, 3
if (LDSstate == 1)
{
LDS[2] += (foot.CurrentMarker.TimeStamp - LDS[0]);
LDS[3]++;
LDSstate = 0;
LDSlist.Add(foot.CurrentMarker.TimeStamp - LDS[0]);
}
break;
case 4:
//Right swing stance -> 3, 4, 3n
if (RSSstate == 1)
{
RSS[1] = foot.CurrentMarker.TimeStamp;
RSSstate = 2;
}
//Right cycle duration -> 4, 4n
RCD[RCDstate] = foot.CurrentMarker.TimeStamp;
if (RCDstate == 1)
{
RCD[2] += (RCD[1] - RCD[0]);
RCD[3]++;
RCDstate = 0;
RCDlist.Add(RCD[1] - RCD[0]);
}
else
{
RCDstate = 1;
}
//Left step interval -> 2, 4
if (LSIstate == 1)
{
LSI[2] += (foot.CurrentMarker.TimeStamp - LSI[0]);
LSI[3]++;
LSIstate = 0;
LSIlist.Add(foot.CurrentMarker.TimeStamp - LSI[0]);
}
//Right step interval -> 4, 2n
RSI[RSIstate] = foot.CurrentMarker.TimeStamp;
RSIstate = 1;
//Right double support -> 4, 1n
RDS[0] = foot.CurrentMarker.TimeStamp;
RDSstate = 1;
break;
default:
Console.WriteLine("Error in gait cycle tracking.");
break;
}
if (zeroflag)
{
double LSSmean = LSS[3] / LSS[4];
double RSSmean = RSS[3] / RSS[4];
double LCDmean = LCD[2] / LCD[3];
double RCDmean = RCD[2] / RCD[3];
double LSImean = LSI[2] / LSI[3];
double RSImean = RSI[2] / RSI[3];
double LDSmean = LDS[2] / LDS[3];
double RDSmean = RDS[2] / RDS[3];
sssi = (100 * (RSSmean - LSSmean) / (RSSmean + LSSmean));
cdsi = (100 * (RCDmean - LCDmean) / (RCDmean + LCDmean));
sisi = (100 * (RSImean - LSImean) / (RSImean + LSImean));
dssi = (100 * (RDSmean - LDSmean) / (RDSmean + LDSmean));
}
else
{
if ((LSS[4] != 0) && (RSS[4] != 0) && (LCD[3] != 0) && (RCD[3] != 0) && (LSI[3] != 0) && (RSI[3] != 0) && (LDS[3] != 0) && (RDS[3] != 0))
zeroflag = true;
}
}
private int CycleState(Foot foot)
{
int state = 0;
if (foot.FootName == "left")
{
state = 1;
}
else
{
state = 3;
}
if (foot.ZDirection == -1)
{
state++;
}
return state;
}
private void Foot_zFootPeakDetected(Foot foot)
{
if (startcount == 3)//wait for 2 events before starting cycling
{
int currentstate = CycleState(foot);
if (currentstate != 0)
{
//if (teststart == 0) teststart = foot.CurrentMarker.TimeStamp; //save time at start
if (currentstate != ((cyclestate % 4) + 1))
{
//regular stride sequence interrupted
//reset state table and cyclestate to initiate new stride sequence
cyclestate = 0;
tablepointer = 0;
stridestart = 0;
foot1 = null;
foot2 = null;
}
else
{
//process state table - add event and time, calc SI if 2nd block etc
float SIfoot1;
float SIfoot2;
cyclestate = currentstate;
statetable[tablepointer] = foot.CurrentMarker.TimeStamp - teststart;
System.Diagnostics.Debug.WriteLine("Cyclestate:" + cyclestate + " Foot event:" + foot.FootName + "(" + foot.ZDirection + ")" + statetable[tablepointer] + " Tablepointer:" + tablepointer);
switch (tablepointer)
{
case 4:
SIfoot1 = statetable[2] - statetable[1];
SIfoot2 = statetable[4] - statetable[3];
DSSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 5:
SIfoot1 = statetable[3] - statetable[1];
SIfoot2 = statetable[5] - statetable[3];
SISI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 6:
SIfoot1 = (float)((float)(statetable[1] - statetable[0]) / (float)(statetable[4] - statetable[1]));
SIfoot2 = (float)((float)(statetable[3] - statetable[2]) / (float)(statetable[6] - statetable[3]));
SSSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
break;
case 7:
SIfoot1 = statetable[5] - statetable[1];
SIfoot2 = statetable[7] - statetable[3];
CDSI.Add(SymmetryIndex(SIfoot1, SIfoot2));
//shift statetable block2 -> block1 [2nd stride of previous becomes 1st stride of next]
statetable[0] = statetable[4];
statetable[1] = statetable[5];
statetable[2] = statetable[6];
statetable[3] = statetable[7];
tablepointer = 3;
System.Diagnostics.Debug.WriteLine("\n");
break;
default:
break;
}
tablepointer++;
}
}
}
else
{
startcount++;
}
}
//can add asymmetry analysis (exisitng class will require a small rewrite) and an overshoot measure for x-peaks
private void Foot_zFootPeakDetected(Foot foot)
{
//sound.Play();
//first check sequence - if sequence broken, reset all variables
int currentstate = CycleState(foot);
if ((cyclestate == 0) || (currentstate != (cyclestate % 4) + 1))
{
cyclestate = currentstate;
//Re-set / re-initialise symmetry variables
LSSstate = 0;
LCDstate = 0;
LSIstate = 0;
LDSstate = 0;
RSSstate = 0;
RCDstate = 0;
RSIstate = 0;
RDSstate = 0;
}
else
{
cyclestate = (cyclestate % 4) + 1;
}
#region Notes on calculation of symmetry measures
//Update all symmetry variables affected by this gait event
//Gait cycle state:
// 1 = left toe off
// 2 = left heel down
// 3 = right toe off
// 4 = right heel down
//Some symmetry parameters require events from more than one strid
//Cyclestates followed by n (eg 2n) indicates an event from a subsequent stride
//When the correct gait events for a parameter have occurred, the result is summed
//and a count kept of the number of elements added (for post-calculation of the mean)
#endregion
Console.WriteLine("Cycle state: " + cyclestate.ToString());
switch (cyclestate)
{
case 1:
//Left swing stance -> 1, 2, 1n
LSS[LSSstate] = foot.CurrentMarker.TimeStamp;
if (LSSstate == 2) //if end of LSS cycle -> add result to summation
{
LSS[3] += ((LSS[1] - LSS[0]) / (LSS[2] - LSS[1]));
LSS[4]++;
LSSstate = 0;
LSSlist.Add((LSS[1] - LSS[0]) / (LSS[2] - LSS[1]));
}
else
{
LSSstate = 1;
}
//Right double support -> 4, 1n
//Double support calculation only requires 2 events (4, 1n) in that order
//If gait cycle event '1' is not received after an event '4', it can be ignored
//ie. it will not contribute to a valid calculation
if (RDSstate == 1)
{
RDS[2] += (foot.CurrentMarker.TimeStamp - RDS[0]);
RDS[3]++;
RDSstate = 0;
RDSlist.Add((foot.CurrentMarker.TimeStamp - RDS[0]));
}
break;
case 2:
//Left swing stance -> 1, 2, 1n
if (LSSstate == 1)
{
LSS[1] = foot.CurrentMarker.TimeStamp;
LSSstate = 2;
}
//Left cycle duration -> 2, 2n
//Any '2' event can be stored, only the 2nd will trigger a calculation
LCD[LCDstate] = foot.CurrentMarker.TimeStamp;
if (LCDstate == 1)
{
LCD[2] += (LCD[1] - LCD[0]);
LCD[3]++;
LCDstate = 0;
LCDlist.Add(LCD[1] - LCD[0]);
}
else
{
LCDstate = 1;
}
//Left step interval -> 2, 4
LSI[0] = foot.CurrentMarker.TimeStamp;
LSIstate = 1;
//Right step interval -> 4, 2n
if (RSIstate == 1)
{
RSI[2] += (foot.CurrentMarker.TimeStamp - RSI[0]);
RSI[3]++;
RSIstate = 0;
RSIlist.Add(foot.CurrentMarker.TimeStamp - RSI[0]);
}
//Left double support -> 2, 3
LDS[0] = foot.CurrentMarker.TimeStamp;
LDSstate = 1;
break;
case 3:
//Right swing stance -> 3, 4, 3n
RSS[RSSstate] = foot.CurrentMarker.TimeStamp;
if (RSSstate == 2)
{
RSS[3] += ((RSS[1] - RSS[0]) / (RSS[2] - RSS[1]));
RSS[4]++;
RSSstate = 0;
RSSlist.Add((RSS[1] - RSS[0]) / (RSS[2] - RSS[1]));
}
else
{
RSSstate = 1;
}
//Left double support -> 2, 3
if (LDSstate == 1)
{
LDS[2] += (foot.CurrentMarker.TimeStamp - LDS[0]);
LDS[3]++;
LDSstate = 0;
LDSlist.Add(foot.CurrentMarker.TimeStamp - LDS[0]);
}
break;
case 4:
//Right swing stance -> 3, 4, 3n
if (RSSstate == 1)
{
RSS[1] = foot.CurrentMarker.TimeStamp;
RSSstate = 2;
}
//Right cycle duration -> 4, 4n
RCD[RCDstate] = foot.CurrentMarker.TimeStamp;
if (RCDstate == 1)
{
RCD[2] += (RCD[1] - RCD[0]);
RCD[3]++;
RCDstate = 0;
RCDlist.Add(RCD[1] - RCD[0]);
}
else
{
RCDstate = 1;
}
//Left step interval -> 2, 4
if (LSIstate == 1)
{
LSI[2] += (foot.CurrentMarker.TimeStamp - LSI[0]);
LSI[3]++;
LSIstate = 0;
LSIlist.Add(foot.CurrentMarker.TimeStamp - LSI[0]);
}
//Right step interval -> 4, 2n
RSI[RSIstate] = foot.CurrentMarker.TimeStamp;
RSIstate = 1;
//Right double support -> 4, 1n
RDS[0] = foot.CurrentMarker.TimeStamp;
RDSstate = 1;
break;
default:
Console.WriteLine("Error in gait cycle tracking.");
break;
}
if (zeroflag)
{
double LSSmean = LSS[3] / LSS[4];
double RSSmean = RSS[3] / RSS[4];
double LCDmean = LCD[2] / LCD[3];
double RCDmean = RCD[2] / RCD[3];
double LSImean = LSI[2] / LSI[3];
double RSImean = RSI[2] / RSI[3];
double LDSmean = LDS[2] / LDS[3];
double RDSmean = RDS[2] / RDS[3];
sssi = (100 * (RSSmean - LSSmean) / (RSSmean + LSSmean));
cdsi = (100 * (RCDmean - LCDmean) / (RCDmean + LCDmean));
sisi = (100 * (RSImean - LSImean) / (RSImean + LSImean));
dssi = (100 * (RDSmean - LDSmean) / (RDSmean + LDSmean));
}
else
{
if ((LSS[4] != 0) && (RSS[4] != 0) && (LCD[3] != 0) && (RCD[3] != 0) && (LSI[3] != 0) && (RSI[3] != 0) && (LDS[3] != 0) && (RDS[3] != 0))
{
zeroflag = true;
}
}
}