OpenSim::Function Class Reference

#include <Function.h>

Inheritance diagram for OpenSim::Function:

List of all members.

Public Member Functions
	Function ()
	Default constructor.
	Function (const Function &aFunction)
	Copy constructor.
virtual	~Function ()
	Destructor.
virtual Object *	copy () const =0
	Construct and return a copy of this object.
virtual void	init (Function *aFunction)
Function &	operator= (const Function &aFunction)
	Assignment operator.
virtual double	calcValue (const SimTK::Vector &x) const
	Calculate the value of this function at a particular point.
virtual double	calcDerivative (const std::vector< int > &derivComponents, const SimTK::Vector &x) const
	Calculate a partial derivative of this function at a particular point.
virtual int	getArgumentSize () const
	Get the number of components expected in the input vector.
virtual int	getMaxDerivativeOrder () const
	Get the maximum derivative order this Function object can calculate.
virtual SimTK::Function *	createSimTKFunction () const =0
	OPENSIM_DECLARE_DERIVED (Function, Object)
Static Public Member Functions
static Function *	makeFunctionOfType (Function *aFunction, const std::string &aNewTypeName)
Protected Member Functions
void	resetFunction ()
	This should be called whenever this object has been modified.
Protected Attributes
SimTK::Function *	_function

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Constructor & Destructor Documentation

Function::Function

(

)

Default constructor.

Function::Function

(

const Function &

aFunction

)

Copy constructor.

Parameters:

aFunction

Function to copy.

Function::~Function

(

)

[virtual]

Destructor.

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Member Function Documentation

virtual double OpenSim::Function::calcDerivative	(	const std::vector< int > &	derivComponents,
		const SimTK::Vector &	x
	)			const [virtual]

Calculate a partial derivative of this function at a particular point.

Which derivative to take is specified by listing the input components with which to take it. For example, if derivComponents=={0}, that indicates a first derivative with respective to component 0. If derivComponents=={0, 0, 0}, that indicates a third derivative with respective to component 0. If derivComponents=={4, 7}, that indicates a partial second derivative with respect to components 4 and 7.

Parameters:

	derivComponents	the input components with respect to which the derivative should be taken. Its size must be less than or equal to the value returned by getMaxDerivativeOrder().
	x	the Vector of input arguments. Its size must equal the value returned by getArgumentSize().

Reimplemented in OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, and OpenSim::PiecewiseLinearFunction.

virtual double OpenSim::Function::calcValue

(

const SimTK::Vector &

x

)

const [virtual]

Calculate the value of this function at a particular point.

Parameters:

x

the Vector of input arguments. Its size must equal the value returned by getArgumentSize().

Reimplemented in OpenSim::Constant, OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, and OpenSim::PiecewiseLinearFunction.

virtual Object* OpenSim::Function::copy

(

)

const [pure virtual]

Construct and return a copy of this object.

The object is allocated using the new operator, so the caller is responsible for deleting the returned object.

Returns:

Copy of this object.

Reimplemented from OpenSim::Object.

Implemented in OpenSim::Constant, OpenSim::GCVSpline, OpenSim::LinearFunction, OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, OpenSim::PiecewiseLinearFunction, and OpenSim::StepFunction.

virtual SimTK::Function* OpenSim::Function::createSimTKFunction

(

)

const [pure virtual]

Implemented in OpenSim::Constant, OpenSim::GCVSpline, OpenSim::LinearFunction, OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, OpenSim::PiecewiseLinearFunction, and OpenSim::StepFunction.

int Function::getArgumentSize

(

)

const [virtual]

Get the number of components expected in the input vector.

Reimplemented in OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, and OpenSim::PiecewiseLinearFunction.

int Function::getMaxDerivativeOrder

(

)

const [virtual]

Get the maximum derivative order this Function object can calculate.

Reimplemented in OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, and OpenSim::PiecewiseLinearFunction.

virtual void OpenSim::Function::init

(

Function *

aFunction

)

[inline, virtual]

static Function* OpenSim::Function::makeFunctionOfType	(	Function *	aFunction,
		const std::string &	aNewTypeName
	)			[static]

OpenSim::Function::OPENSIM_DECLARE_DERIVED	(	Function	,
		Object
	)

Function & Function::operator=

(

const Function &

aFunction

)

Assignment operator.

Returns:

Reference to this object.

Reimplemented from OpenSim::Object.

Reimplemented in OpenSim::Constant, OpenSim::GCVSpline, OpenSim::LinearFunction, OpenSim::MultiplierFunction, OpenSim::NaturalCubicSpline, OpenSim::PiecewiseConstantFunction, OpenSim::PiecewiseLinearFunction, and OpenSim::StepFunction.

void Function::resetFunction

(

)

[protected]

This should be called whenever this object has been modified.

It clears the internal SimTK::Function object used to evaluate it.

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Member Data Documentation

SimTK::Function* OpenSim::Function::_function [mutable, protected]

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The documentation for this class was generated from the following files:

• OpenSim/Common/Function.h
• OpenSim/Common/Function.cpp