chrono::ChFunction_Repeat Class Reference

Description

Repeat function: y = __/__/__/

Repeats a 'window' of a function, periodically. Evaluates a fa(t) function as:

fa(t) = fa(window_start + mod(t + window_phase, window_length))

Note: for infinite window_length and zero window_start, you can use window_phase to simply 'translate' the function on abscissa.

#include <ChFunction_Repeat.h>

Inheritance diagram for chrono::ChFunction_Repeat:
Collaboration diagram for chrono::ChFunction_Repeat:

Public Member Functions

 ChFunction_Repeat (std::shared_ptr< ChFunction > func, double start=0, double length=1, double phase=0)
 
 ChFunction_Repeat (const ChFunction_Repeat &other)
 
virtual ChFunction_RepeatClone () const override
 "Virtual" copy constructor (covariant return type).
 
virtual FunctionType Get_Type () const override
 Return the unique function type identifier.
 
virtual double Get_y (double x) const override
 Return the y value of the function, at position x.
 
void Set_window_start (double start)
 
double Get_window_start () const
 
void Set_window_length (double length)
 
double Get_window_length () const
 
void Set_window_phase (double phase)
 
double Get_window_phase () const
 
void Set_fa (std::shared_ptr< ChFunction > func)
 
std::shared_ptr< ChFunctionGet_fa ()
 
virtual void Estimate_x_range (double &xmin, double &xmax) const override
 Return an estimate of the range of the function argument. More...
 
virtual void ArchiveOut (ChArchiveOut &archive) override
 Method to allow serialization of transient data to archives.
 
virtual void ArchiveIn (ChArchiveIn &archive) override
 Method to allow de-serialization of transient data from archives.
 
- Public Member Functions inherited from chrono::ChFunction
 ChFunction (const ChFunction &other)
 
virtual double Get_y_dx (double x) const
 Return the dy/dx derivative of the function, at position x. More...
 
virtual double Get_y_dxdx (double x) const
 Return the ddy/dxdx double derivative of the function, at position x. More...
 
virtual double Get_y_dxdxdx (double x) const
 Return the dddy/dxdxdx triple derivative of the function, at position x. More...
 
virtual double Get_weight (double x) const
 Return the weight of the function (useful for applications where you need to mix different weighted ChFunctions)
 
virtual void Estimate_y_range (double xmin, double xmax, double &ymin, double &ymax, int derivate) const
 Return an estimate of the range of the function value. More...
 
virtual double Get_y_dN (double x, int derivate) const
 Return the function derivative of specified order at the given point. More...
 
virtual void Update (double x)
 Update could be implemented by children classes, ex. to launch callbacks.
 
virtual double Compute_max (double xmin, double xmax, double sampling_step, int derivate) const
 Compute the maximum of y(x) in a range xmin-xmax, using a sampling method.
 
virtual double Compute_min (double xmin, double xmax, double sampling_step, int derivate) const
 Compute the minimum of y(x) in a range xmin-xmax, using a sampling method.
 
virtual double Compute_mean (double xmin, double xmax, double sampling_step, int derivate) const
 Compute the mean value of y(x) in a range xmin-xmax, using a sampling method.
 
virtual double Compute_sqrmean (double xmin, double xmax, double sampling_step, int derivate) const
 Compute the square mean val. of y(x) in a range xmin-xmax, using sampling.
 
virtual double Compute_int (double xmin, double xmax, double sampling_step, int derivate) const
 Compute the integral of y(x) in a range xmin-xmax, using a sampling method.
 
virtual double Get_Ca_pos () const
 Computes the positive acceleration coefficient (inherited classes should customize this).
 
virtual double Get_Ca_neg () const
 Compute the positive acceleration coefficient (inherited classes should customize this).
 
virtual double Get_Cv () const
 Compute the speed coefficient (inherited classes must customize this).
 
virtual int HandleNumber () const
 Return the number of handles of the function.
 
virtual bool HandleAccess (int handle_id, double mx, double my, bool set_mode)
 Get the x and y position of handle, given identifier. More...
 
virtual int FilePostscriptPlot (ChFile_ps *m_file, int plotY, int plotDY, int plotDDY)
 Plot function in graph space of the ChFile_ps postscript file where zoom factor, centering, color, thickness etc. More...
 
virtual int FileAsciiPairsSave (ChStreamOutAscii &m_file, double xmin=0, double xmax=1, int msamples=200)
 Save function as X-Y pairs separated by space, with CR at each pair, into an ASCII file. More...
 
virtual void EvaluateIntervaldN (ChMatrixDynamic<> &data, double xmin, double xmax, double step, int der=0)
 Sample function on entire interval, up to Nth derivative (der = 0: y, 1: y_dx, 2: y_dxdx, 3: y_dxdxdx). More...
 

Additional Inherited Members

- Public Types inherited from chrono::ChFunction
enum  FunctionType {
  FUNCT_CUSTOM, FUNCT_CONST, FUNCT_CONSTACC, FUNCT_DERIVE,
  FUNCT_FILLET3, FUNCT_INTEGRATE, FUNCT_MATLAB, FUNCT_MIRROR,
  FUNCT_MOCAP, FUNCT_NOISE, FUNCT_OPERATION, FUNCT_OSCILLOSCOPE,
  FUNCT_POLY, FUNCT_POLY345, FUNCT_RAMP, FUNCT_RECORDER,
  FUNCT_REPEAT, FUNCT_SEQUENCE, FUNCT_SIGMA, FUNCT_SINE,
  FUNCT_LAMBDA, FUNCT_CYCLOIDAL, FUNCT_BSPLINE, FUNCT_DOUBLES
}
 Enumeration of function types.
 

Member Function Documentation

◆ Estimate_x_range()

void chrono::ChFunction_Repeat::Estimate_x_range ( double &  xmin,
double &  xmax 
) const
overridevirtual

Return an estimate of the range of the function argument.

(Can be used for automatic zooming in a GUI)

Reimplemented from chrono::ChFunction.


The documentation for this class was generated from the following files:
  • /builds/uwsbel/chrono/src/chrono/motion_functions/ChFunction_Repeat.h
  • /builds/uwsbel/chrono/src/chrono/motion_functions/ChFunction_Repeat.cpp