NuTo::Constraint::Constraints Class Reference

stores constraint equations, separated by their dof type More...

#include <Constraints.h>

Public Member Functions
void	Add (DofType dof, Equation equation)
	adds an equation More...
void	Add (DofType dof, std::vector< Equation > equations)
	adds multiple equations More...
Eigen::VectorXd	GetRhs (DofType dof, double time) const
	builds the time dependent constraint rhs vector for a specific dof type More...
Eigen::SparseVector< double >	GetSparseGlobalRhs (DofType dof, int numDofs, double time) const
	builds the rhs of the constraint equations in a sparse global vector More...
JKNumbering	GetJKNumbering (DofType dof, int numDofs) const
	builds a numbering where first the independent dofs are consecutively numbered leaving out the dependent ones and then the dependent dof numbers are appended. More...
Eigen::SparseMatrix< double >	BuildUnitConstraintMatrix (DofType dof, int numDofs) const
	builds a sparse matrix containing the constraint terms for a specific dof type and a unit matrix for the independent dofs More...
int	GetNumEquations (DofType dof) const
	calculates the number of constraint equations for a specific dof type More...
const Equation &	GetEquation (DofType dof, int equationNumber) const
	gets the specified equation More...

Detailed Description

stores constraint equations, separated by their dof type

Member Function Documentation

void Constraints::Add	(	DofType	dof,
		Equation	equation
	)

adds an equation

Parameters

dof	dof type
equation	constraint equation

void Constraints::Add	(	DofType	dof,
		std::vector< Equation >	equations
	)

adds multiple equations

Parameters

dof	dof type
equations	constraint equations

Eigen::SparseMatrix< double > Constraints::BuildUnitConstraintMatrix	(	DofType	dof,
		int	numDofs
	)		const

builds a sparse matrix containing the constraint terms for a specific dof type and a unit matrix for the independent dofs

Parameters

dof	dof type
numDofs	number dofs for the dof type, required for a proper resize of the sparse matrix

Returns

sparse matrix containing the constraint terms

const Equation & Constraints::GetEquation	(	DofType	dof,
		int	equationNumber
	)		const

gets the specified equation

Parameters

dof	doftype of the equation
equationNumber	number of the equation

Returns

selected equation

JKNumbering Constraints::GetJKNumbering	(	DofType	dof,
		int	numDofs
	)		const

builds a numbering where first the independent dofs are consecutively numbered leaving out the dependent ones and then the dependent dof numbers are appended.

The order of the dependent dofs is given by the order of the constraint equations

This numbering is used in BuildUnitConstraintMatrix

Parameters

dof	dof type
numDofs	number dofs for the dof type

Returns

index vector with first independent dof numbers and then dependent

int Constraints::GetNumEquations

(

DofType

dof

)

const

calculates the number of constraint equations for a specific dof type

Parameters

dof

dof type

Returns

number of constraint equations

Eigen::VectorXd Constraints::GetRhs	(	DofType	dof,
		double	time
	)		const

builds the time dependent constraint rhs vector for a specific dof type

Parameters

dof	dof type
time	global time

Returns

constraint rhs vector

Eigen::SparseVector< double > Constraints::GetSparseGlobalRhs	(	DofType	dof,
		int	numDofs,
		double	time
	)		const

builds the rhs of the constraint equations in a sparse global vector

Parameters

dof	dof type
numDofs	total number of dofs for a specfic dof type
time	time at which the rhs vector should be evaluated

Returns

sparse rhs vector of the constraint equations rhs(time)

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

• nuto/mechanics/constraints/Constraints.h
• nuto/mechanics/constraints/Constraints.cpp