Scales a given an ObjectiveFunction. More...

#include <CompositeOFScalarMultiply.hpp>

Inheritance diagram for MBMesquite::CompositeOFScalarMultiply:

Collaboration diagram for MBMesquite::CompositeOFScalarMultiply:

Public Member Functions
	CompositeOFScalarMultiply (double, ObjectiveFunction *, bool delete_OF=false)
virtual	~CompositeOFScalarMultiply ()
virtual void	initialize_queue (MeshDomainAssoc mesh_and_domain, const Settings settings, MsqError &err)
	Called at start of instruction queue processing.
virtual bool	initialize_block_coordinate_descent (MeshDomainAssoc mesh_and_domain, const Settings settings, PatchSet *user_set, MsqError &err)
	Initial accumulated value for block coordinate descent algorithms.
virtual bool	evaluate (EvalType type, PatchData &pd, double &value_out, bool free, MsqError &err)
	Evaluate objective function for specified patch.
virtual bool	evaluate_with_gradient (EvalType type, PatchData &pd, double &value_out, std::vector< Vector3D > &grad_out, MsqError &err)
	Evaluate objective function and gradient for specified patch.
virtual bool	evaluate_with_Hessian_diagonal (EvalType type, PatchData &pd, double &value_out, std::vector< Vector3D > &grad_out, std::vector< SymMatrix3D > &hess_diag_out, MsqError &err)
	Evaluate objective function and diagonal blocks of Hessian for specified patch.
virtual bool	evaluate_with_Hessian (EvalType type, PatchData &pd, double &value_out, std::vector< Vector3D > &grad_out, MsqHessian &Hessian_out, MsqError &err)
	Evaluate objective function and Hessian for specified patch.
virtual ObjectiveFunction *	clone () const
	Create copy with same state.
virtual void	clear ()
virtual int	min_patch_layers () const
Private Attributes
ObjectiveFunction *	objFunc
double	mAlpha
bool	deleteObjFunc

Detailed Description

Scales a given an ObjectiveFunction.

Definition at line 54 of file CompositeOFScalarMultiply.hpp.

Constructor & Destructor Documentation

MBMesquite::CompositeOFScalarMultiply::CompositeOFScalarMultiply	(	double	alp,
		ObjectiveFunction *	Obj,
		bool	delete_of = `false`
	)

Sets the QualityMetric pointer to the metric associated with Obj. However, if alp is less than zero, the new ObjectiveFunction's negateFlag is the opposite of Obj's. This objective function defaults to the analytical gradient.

Parameters:

alp	(double)
Obj	(ObjectiveFunction*)

Definition at line 53 of file CompositeOFScalarMultiply.cpp.

References mAlpha, and objFunc.

Referenced by clone().

    : deleteObjFunc( delete_of )
{
    objFunc = Obj;
    mAlpha  = alp;
}

MBMesquite::CompositeOFScalarMultiply::~CompositeOFScalarMultiply ( ) [virtual]

Definition at line 61 of file CompositeOFScalarMultiply.cpp.

References deleteObjFunc, and objFunc.

{
    if( deleteObjFunc ) delete objFunc;
}

Member Function Documentation

void MBMesquite::CompositeOFScalarMultiply::clear ( ) [virtual]

Clear any values accumulated for BCD-related eval calls

Implements MBMesquite::ObjectiveFunction.

Definition at line 71 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::clear(), and objFunc.

{
    objFunc->clear();
}

ObjectiveFunction * MBMesquite::CompositeOFScalarMultiply::clone ( ) const [virtual]

Create copy with same state.

Create a new instance of the objective function that is a copy of the callee with the same accumulated values, parameters, etc.

Implements MBMesquite::ObjectiveFunction.

Definition at line 66 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::clone(), CompositeOFScalarMultiply(), mAlpha, and objFunc.

{
    return new CompositeOFScalarMultiply( mAlpha, objFunc->clone(), true );
}

bool MBMesquite::CompositeOFScalarMultiply::evaluate	(	EvalType	type,
		PatchData &	pd,
		double &	value_out,
		bool	free,
		MsqError &	err
	)		`[virtual]`

Evaluate objective function for specified patch.

Either evaluate the objective function over the passed patch or update the accumulated, global objective function value for changes in the passed patch, depending on the value of the EvalType.

Parameters:

type	Evaluation type.
pd	The patch.
value_out	The passed-back value of the objective fuction.
free	If true, incorporate the quality metric values only for those metric evaluations that depend on at least one free vertex

Returns:: false if any QualityMetric evaluation returned false, true otherwise.

Implements MBMesquite::ObjectiveFunction.

Definition at line 92 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::evaluate(), mAlpha, MSQ_CHKERR, and objFunc.

{
    bool ok = objFunc->evaluate( type, pd, value_out, free, err );
    value_out *= mAlpha;
    return !MSQ_CHKERR( err ) && ok;
}

bool MBMesquite::CompositeOFScalarMultiply::evaluate_with_gradient	(	EvalType	eval_type,
		PatchData &	pd,
		double &	OF_val,
		std::vector< Vector3D > &	grad,
		MsqError &	err
	)		`[virtual]`

Evaluate objective function and gradient for specified patch.

Either evaluate the objective function over the passed patch or update the accumulated, global objective function value for changes in the passed patch, depending on the value of the EvalType.

The default implementation of this function will use the value-only variation of the evaluate method and numerical approximation to calculate gradients. Whenever possible, objective function implementations should provide more efficient analyical gradient calculations.

Parameters:

type	Evaluation type.
pd	The patch.
value_out	The passed-back value of the objective fuction.
grad_out	The gradient of the OF wrt the coordinates of each free vertex in the patch.

Returns:: false if any QualityMetric evaluation returned false, true otherwise.

Numerically Calculates the gradient of the ObjectiveFunction for the free vertices in the patch. Returns 'false' if the patch is outside of a required feasible region, returns 'ture' otherwise. The behavior of the function depends on the value of the boolean useLocalGradient. If useLocalGradient is set to 'true', compute_numerical_gradient creates a sub-patch around a free vertex, and then perturbs that vertex in one of the coordinate directions. Only the ObjectiveFunction value on the local sub-patch is used in the computation of the gradient. Therefore, useLocalGradient should only be set to 'true' for ObjectiveFunctions which can use this method. Unless the concrete ObjectiveFunction sets useLocalGradient to 'true' in its constructor, the value will be 'false'. In this case, the objective function value for the entire patch is used in the calculation of the gradient. This is computationally expensive, but it is numerically correct for all (C_1) functions.

Parameters:

pd	PatchData on which the gradient is taken.
grad	Array of Vector3D of length the number of vertices used to store gradient.
OF_val	will be set to the objective function value.

Reimplemented from MBMesquite::ObjectiveFunction.

Definition at line 99 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::evaluate_with_gradient(), mAlpha, MSQ_CHKERR, and objFunc.

{
    bool ok = objFunc->evaluate_with_gradient( type, pd, value_out, grad_out, err );
    value_out *= mAlpha;
    for( std::vector< Vector3D >::iterator i = grad_out.begin(); i != grad_out.end(); ++i )
        *i *= mAlpha;
    return !MSQ_CHKERR( err ) && ok;
}

bool MBMesquite::CompositeOFScalarMultiply::evaluate_with_Hessian	(	EvalType	type,
		PatchData &	pd,
		double &	value_out,
		std::vector< Vector3D > &	grad_out,
		MsqHessian &	Hessian_out,
		MsqError &	err
	)		`[virtual]`

Evaluate objective function and Hessian for specified patch.

Either evaluate the objective function over the passed patch or update the accumulated, global objective function value for changes in the passed patch, depending on the value of the EvalType.

The default implementation of this function will fail.

Parameters:

type	Evaluation type.
pd	The patch.
value_out	The passed-back value of the objective fuction.
grad_out	The gradient of the OF wrt the coordinates of each free vertex in the patch.
Hessian_out	The Hessian of the OF wrt the coordinates of each free vertex in the patch.

Returns:: false if any QualityMetric evaluation returned false, true otherwise.

Reimplemented from MBMesquite::ObjectiveFunction.

Definition at line 129 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::evaluate_with_Hessian(), mAlpha, MSQ_CHKERR, objFunc, and MBMesquite::MsqHessian::scale().

{
    bool ok = objFunc->evaluate_with_Hessian( type, pd, value_out, grad_out, Hessian_out, err );
    value_out *= mAlpha;
    for( std::vector< Vector3D >::iterator i = grad_out.begin(); i != grad_out.end(); ++i )
        *i *= mAlpha;
    Hessian_out.scale( mAlpha );
    return !MSQ_CHKERR( err ) && ok;
}

bool MBMesquite::CompositeOFScalarMultiply::evaluate_with_Hessian_diagonal	(	EvalType	type,
		PatchData &	pd,
		double &	value_out,
		std::vector< Vector3D > &	grad_out,
		std::vector< SymMatrix3D > &	hess_diag_out,
		MsqError &	err
	)		`[virtual]`

Evaluate objective function and diagonal blocks of Hessian for specified patch.

Either evaluate the objective function over the passed patch or update the accumulated, global objective function value for changes in the passed patch, depending on the value of the EvalType.

The default implementation of this function evaluate the entire Hessian and discard non-diagonal portions. Concrete objective functions should provide a more efficient implementation that evaluates and accumulates only the required terms.

Parameters:

type	Evaluation type.
pd	The patch.
value_out	The passed-back value of the objective fuction.
grad_out	The gradient of the OF wrt the coordinates of each free vertex in the patch.
hess_diag_out	The diagonal blocks of a Hessian. I.e. Decompose the Hessian into 3x3 submatrices and return only the submatrices (blocks) along the diagonal.

Returns:: false if any QualityMetric evaluation returned false, true otherwise.

Reimplemented from MBMesquite::ObjectiveFunction.

Definition at line 112 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::evaluate_with_Hessian_diagonal(), mAlpha, MSQ_CHKERR, MBMesquite::PatchData::num_free_vertices(), and objFunc.

{
    bool ok = objFunc->evaluate_with_Hessian_diagonal( type, pd, value_out, grad_out, diag_out, err );
    value_out *= mAlpha;
    for( size_t i = 0; i < pd.num_free_vertices(); ++i )
    {
        grad_out[i] *= mAlpha;
        diag_out[i] *= mAlpha;
    }
    return !MSQ_CHKERR( err ) && ok;
}

bool MBMesquite::CompositeOFScalarMultiply::initialize_block_coordinate_descent	(	MeshDomainAssoc *	mesh_and_domain,
		const Settings *	settings,
		PatchSet *	user_set,
		MsqError &	err
	)		`[virtual]`

Initial accumulated value for block coordinate descent algorithms.

Set accumulated value of objective function to the value for the entire, unmodified mesh. This is the initial state for a block coordinate descent algorithm. The ObjectiveFunction will asked to add or remove values for a specific patch of the mesh during the optimization.

Parameters:

mesh	The Mesh
domain	The MeshDomain
user_set	User-defined patch set - not relevant for most OF templates.

Implements MBMesquite::ObjectiveFunction.

Definition at line 83 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::initialize_block_coordinate_descent(), MSQ_CHKERR, and objFunc.

{
    bool rval = objFunc->initialize_block_coordinate_descent( mesh_and_domain, settings, user_set, err );
    return !MSQ_CHKERR( err ) && rval;
}

void MBMesquite::CompositeOFScalarMultiply::initialize_queue	(	MeshDomainAssoc *	mesh_and_domain,
		const Settings *	settings,
		MsqError &	err
	)		`[virtual]`

Called at start of instruction queue processing.

Do any preliminary global initialization, consistency checking, etc.

Implements MBMesquite::ObjectiveFunction.

Definition at line 76 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::initialize_queue(), MSQ_ERRRTN, and objFunc.

{
    objFunc->initialize_queue( mesh_and_domain, settings, err );MSQ_ERRRTN( err );
}

int MBMesquite::CompositeOFScalarMultiply::min_patch_layers ( ) const [virtual]

Get the minimum number of layers of adjacent elements required in a patch to evaluate the objective function for a single free vertex.

Implements MBMesquite::ObjectiveFunction.

Definition at line 144 of file CompositeOFScalarMultiply.cpp.

References MBMesquite::ObjectiveFunction::min_patch_layers(), and objFunc.

{
    return objFunc->min_patch_layers();
}

Member Data Documentation

bool MBMesquite::CompositeOFScalarMultiply::deleteObjFunc [private]

Definition at line 102 of file CompositeOFScalarMultiply.hpp.

Referenced by ~CompositeOFScalarMultiply().

double MBMesquite::CompositeOFScalarMultiply::mAlpha [private]

Definition at line 101 of file CompositeOFScalarMultiply.hpp.

Referenced by clone(), CompositeOFScalarMultiply(), evaluate(), evaluate_with_gradient(), evaluate_with_Hessian(), and evaluate_with_Hessian_diagonal().

ObjectiveFunction* MBMesquite::CompositeOFScalarMultiply::objFunc [private]

Definition at line 100 of file CompositeOFScalarMultiply.hpp.

Referenced by clear(), clone(), CompositeOFScalarMultiply(), evaluate(), evaluate_with_gradient(), evaluate_with_Hessian(), evaluate_with_Hessian_diagonal(), initialize_block_coordinate_descent(), initialize_queue(), min_patch_layers(), and ~CompositeOFScalarMultiply().

List of all members.

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

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation