Description

Determines times of local minimum and/or maximum of specified scalar calculation. Determination is performed within interval list using Sampling and Convergence parameters.

Object Model

Public Properties

Calculation	The scalar calculation.
Convergence	The Convergence definition, which uses time tolerance to determine when time of extremum is found.
CustomTimeLimits	A custom interval list or a single interval. It is by default set to overall availability of host object. This determines time limits within which global minimum or maximum is sought.
ExtremumType	The extremum type (either minimum or maximum) from the time instant.
IsGlobal	Indicates whether to perform local or global search. The default is false.
Sampling	The Sampling definition, which can use a fixed step, relative tolerance or curvature tolerance. Relative tolerance uses a combination of relative and absolute changes in scalar values between samples. Curvature tolerance also uses changes in slope between samples.
SaveDataOption	Specify whether computed time of extrema is saved/loaded, otherwise it is recomputed on load if necessary.
UseCustomTimeLimits	Indicate whether to use specified custom interval list (see CustomTimeLimits).

Example

Create and configure extrema event array.

[C#] Copy Code

IAgCrdnEventArray eventArray = provider.EventArrays.Factory.CreateEventArrayExtrema("MyEventArrayExtrema",  "MyDescription"); 


IAgCrdnEventArrayExtrema asExtrema = eventArray as IAgCrdnEventArrayExtrema; 


 

asExtrema.Calculation = provider.CalcScalars["GroundTrajectory.Detic.LLA.Altitude"]; 


 

asExtrema.IsGlobal = true; 

asExtrema.ExtremumType = AgECrdnExtremumConstants.eCrdnExtremumMaximum; 


 

IAgCrdnFindTimesResult timeArrays = eventArray.FindTimes(); 


if (timeArrays.IsValid) 


{ 

    Console.WriteLine("Times"); 

    int numTimes = timeArrays.Times.GetLength(0); 


    for (int i = 0; i < numTimes; ++i) 


    { 

        Console.WriteLine(timeArrays.Times.GetValue(i)); 


    } 

 

    foreach (IAgCrdnInterval timeArray in timeArrays.Intervals) 


    { 

        Console.WriteLine("Start: " + timeArray.Start); 


        Console.WriteLine("Stop: " + timeArray.Stop); 


    } 

}

Create and configure extrema event array.

[Visual Basic .NET] Copy Code

Dim eventArray As
IAgCrdnEventArray =
provider.EventArrays.Factory.CreateEventArrayExtrema("MyEventArrayExtrema", "MyDescription")

Dim asExtrema As IAgCrdnEventArrayExtrema = TryCast(eventArray,
IAgCrdnEventArrayExtrema)



asExtrema.Calculation = provider.CalcScalars("GroundTrajectory.Detic.LLA.Altitude")



asExtrema.IsGlobal = True

asExtrema.ExtremumType =
AgECrdnExtremumConstants.eCrdnExtremumMaximum



Dim timeArrays As IAgCrdnFindTimesResult =
eventArray.FindTimes()

If timeArrays.IsValid Then

    Console.WriteLine("Times")

    Dim numTimes
As Integer = timeArrays.Times.GetLength(0)

    Dim i
As Integer = 0

    While i
<>

        Console.WriteLine(timeArrays.Times.GetValue(i))


        System.Threading.Interlocked.Increment(i)


    End
While



    For
Each timeArray As IAgCrdnInterval In
timeArrays.Intervals

        Console.WriteLine("Start:
" + timeArray.Start)

        Console.WriteLine("Stop:
" + timeArray.[Stop])

    Next

End If

CoClasses that Implement IAgCrdnEventArrayExtrema

Name
AgCrdnEventArrayExtrema

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IAgCrdnEventArrayExtrema Interface