chrono::ChFunctionPoly Class Reference
Description
Polynomial function.
y = a + b*x + c*x^2 + d*x^3 + ...
#include <ChFunctionPoly.h>
Inheritance diagram for chrono::ChFunctionPoly:
Collaboration diagram for chrono::ChFunctionPoly:
Public Member Functions | |
| ChFunctionPoly (const ChFunctionPoly &other) | |
| virtual ChFunctionPoly * | Clone () const override |
| "Virtual" copy constructor (covariant return type). | |
| virtual Type | GetType () const override |
| Return the unique function type identifier. | |
| virtual double | GetVal (double x) const override |
| Return the function output for input x. More... | |
| virtual double | GetDer (double x) const override |
| Return the first derivative of the function. More... | |
| virtual double | GetDer2 (double x) const override |
| Return the second derivative of the function. More... | |
| void | SetCoefficients (const std::vector< double > &coeffs) |
| Set the polynomial coefficients. More... | |
| std::vector< double > | GetCoefficients () const |
| Get the polynomial coefficients. | |
| size_t | GetOrder () const |
| Get the order of the polynomial. More... | |
| size_t | GetDegree () const |
| Get the degree of the polynomial. | |
| virtual void | ArchiveOut (ChArchiveOut &archive_out) override |
| Method to allow serialization of transient data to archives. | |
| virtual void | ArchiveIn (ChArchiveIn &archive_in) override |
| Method to allow de-serialization of transient data from archives. | |
 Public Member Functions inherited from chrono::ChFunction | |
| ChFunction (const ChFunction &other) | |
| virtual double | GetDer3 (double x) const |
| Return the third derivative of the function. More... | |
| virtual double | GetDerN (double x, int der_order) const |
| Return the Nth derivative of the function (up to 3rd derivative). More... | |
| virtual double | GetWeight (double x) const |
| Return the weight of the function (useful for applications where you need to mix different weighted ChFunctions) | |
| virtual void | Update (double x) |
| Update could be implemented by children classes, ex. to launch callbacks. | |
| virtual double | GetMax (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the maximum of the function (or its der_order derivative) in the range [xmin, xmax], using sampling method. | |
| virtual double | GetMin (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the minimum of the function (or its der_order derivative) in the range [xmin, xmax], using sampling method. | |
| virtual double | GetMean (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the mean of the function (or its der_order derivative) in the range [xmin, xmax], using sampling method. | |
| virtual double | GetSquaredMean (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the squared mean of the function (or its der_order derivative) in the range [xmin, xmax], using sampling method. | |
| virtual double | GetIntegral (double xmin, double xmax, double sampling_step, int der_order) const |
| Estimate the integral of the function (or its der_order derivative) over the range [xmin, xmax], using sampling method. | |
| virtual double | GetPositiveAccelerationCoeff () const |
| Computes the positive acceleration coefficient (inherited classes should override this). | |
| virtual double | GetNegativeAccelerationCoeff () const |
| Compute the negative acceleration coefficient (inherited classes should override this). | |
| virtual double | GetVelocityCoefficient () const |
| Compute the velocity coefficient (inherited classes must override this). | |
| virtual void | OutputToASCIIFile (std::ostream &file, double xmin, double xmax, int samples, char delimiter) |
| Store X-Y pairs to an ASCII File. More... | |
| virtual ChMatrixDynamic | SampleUpToDerN (double xmin, double xmax, double step, int derN=0) |
| Sample function on given interval [xmin, xmax], up to derN derivative (0 being the function ouput itself). More... | |
| double | operator() (double arg) const |
| Alias operator of the GetVal function. | |
Additional Inherited Members | |
| Public Types inherited from chrono::ChFunction | |
| enum | Type { BSPLINE, CONSTANT, CONSTACC, CONSTJERK, CUSTOM, CYCLOIDAL, DERIVATIVE, FILLET3, INTEGRAL, INTERP, LAMBDA, MIRROR, OPERATOR, POLY, POLY23, POLY345, RAMP, REPEAT, SEQUENCE, SINE, SINE_STEP } |
| Enumeration of function types. | |
Member Function Documentation
◆ GetDer()
|
overridevirtual |
Return the first derivative of the function.
Default implementation computes a numerical differentiation. Inherited classes may override this method with a more efficient implementation (e.g. analytical solution).
Reimplemented from chrono::ChFunction.
◆ GetDer2()
|
overridevirtual |
Return the second derivative of the function.
Default implementation computes a numerical differentiation. Inherited classes may override this method with a more efficient implementation (e.g. analytical solution).
Reimplemented from chrono::ChFunction.
◆ GetOrder()
|
inline |
Get the order of the polynomial.
This equals the number of coefficients.
◆ GetVal()
|
overridevirtual |
Return the function output for input x.
Must be overridden by specialized classes.
Implements chrono::ChFunction.
◆ SetCoefficients()
|
inline |
Set the polynomial coefficients.
The order of the polynome is equal to the size of the provided vector of coefficients
The documentation for this class was generated from the following files:
- /builds/uwsbel/chrono/src/chrono/functions/ChFunctionPoly.h
- /builds/uwsbel/chrono/src/chrono/functions/ChFunctionPoly.cpp
