Simbody  3.5
SimTK::Measure_< T >::Extreme::Implementation Class Reference
+ Inheritance diagram for SimTK::Measure_< T >::Extreme::Implementation:

Public Member Functions

 Implementation ()
 Default constructor leaves the operand measure unspecified; no base class cache entries are allocated. More...
 
 Implementation (const Measure_< T > &operand, Operation op)
 Construct a measure that returns the extreme value taken on by the operand measure during a time stepping study. More...
 
void setOperandMeasure (const Measure_< T > &operand)
 Set the operand measure for this Extreme measure; this is a Topology stage change so you'll have to call realizeTopology() again if you call this. More...
 
void setOperation (Operation op)
 Set the particular operation to be performed by this Extreme measure; this is a Topology stage change so you'll have to call realizeTopology() again if you call this. More...
 
const Measure_< T > & getOperandMeasure () const
 Return a reference to the operand measure for this Extreme measure. More...
 
Operation getOperation () const
 Return the particular operation being performed by this Extreme measure. More...
 
void setValue (State &s, const T &value) const
 Set the current extreme value stored in this Extreme measure's state variable. More...
 
Real getTimeOfExtremeValue (const State &s) const
 Return the time at which the extreme was last updated. More...
 
ImplementationcloneVirtual () const override
 
int getNumTimeDerivativesVirtual () const override
 Extreme(f(t)) has the same number of derivatives as f except that they are all zero unless f(t) is a new extreme. More...
 
Stage getDependsOnStageVirtual (int order) const override
 The depends-on stage for this measure is the same as for its operand. More...
 
const T & getUncachedValueVirtual (const State &s, int derivOrder) const override
 We're not using the Measure_<T> base class cache services, but we do have one of our own. More...
 
void initializeVirtual (State &s) const override
 At start of a time stepping study, this should be called to set the current extreme value to the current value of the operand. More...
 
void realizeMeasureTopologyVirtual (State &s) const override
 Allocate the auto-updated state variable that holds the extreme seen so far. More...
 
void realizeMeasureAccelerationVirtual (const State &s) const override
 In case no one has updated the value of this measure yet, we have to make sure it gets updated before the integration moves ahead. More...
 
bool ensureExtremeHasBeenUpdated (const State &s) const
 Here we make sure that the cache entry is updated if the current value of the operand is more extreme than the previous one, and return a bool indicating whether we have a new extreme. More...
 
- Public Member Functions inherited from SimTK::Measure_< T >::Implementation
const T & getValue (const State &s, int derivOrder) const
 
void setDefaultValue (const T &defaultValue)
 Set a new default value for this Measure. More...
 
const T & getDefaultValue () const
 Return a reference to the value that this Measure will use to initialize its value-level state resource (state variable or cache entry) during the next call to realizeTopology(). More...
 
void setIsPresumedValidAtDependsOnStage (bool presume)
 
bool getIsPresumedValidAtDependsOnStage () const
 

Additional Inherited Members

- Protected Member Functions inherited from SimTK::Measure_< T >::Implementation
 Implementation (const T &defaultValue, int numCacheEntries=1)
 
 Implementation (int numCacheEntries=1)
 Argument numCacheEntries should be one greater than the number of derivatives; that is, there is room for the value ("0th" derivative) also. More...
 
 Implementation (const Implementation &source)
 Copy constructor copies the number of cache entries from the source, but not the cache indices themselves as those must be allocated uniquely for the copy. More...
 
int size () const
 Return the number of elements in the data type of this Measure; for Vector measures this is determined by the size of the default value. More...
 
int getNumCacheEntries () const
 Return the number of cache entries allocated for the value and derivatives of this Measure. More...
 
const T & getCacheEntry (const State &s, int derivOrder) const
 Get a const reference to the value stored in one of this Measure's cache entries, indexed by the derivative order (with the value treated as the 0th derivative). More...
 
T & updCacheEntry (const State &s, int derivOrder) const
 Get a writable reference to the value stored in one of this Measure's cache entries, indexed by the derivative order (with the value treated as the 0th derivative). More...
 
bool isCacheValueRealized (const State &s, int derivOrder) const
 Determine whether a particular one of this Measure's cache entries has already been realized since the given state was modified. More...
 
void markCacheValueRealized (const State &s, int derivOrder) const
 Mark one of this Measure's cache entries up to date; call this after you have calculated a value or derivative and stored it in the corresponding cache entry. More...
 
void markCacheValueNotRealized (const State &s, int derivOrder) const
 Invalidate one of this Measure's cache entries. More...
 
virtual void calcCachedValueVirtual (const State &, int derivOrder, T &value) const
 Concrete measures must override this if the state cache is used for precalculated values or derivatives. More...
 
const T & getValueZero () const
 Return a reference to a zero of the same type and size as this Measure's value. More...
 
- Protected Member Functions inherited from SimTK::AbstractMeasure::Implementation
 Implementation ()
 This default constructor is for use by concrete measure implementation classes. More...
 
 Implementation (const Implementation &src)
 Base class copy constructor removes the Subsystem and sets the reference count to zero. More...
 
Implementationoperator= (const Implementation &src)
 Base class copy assignment operator removes the Subsystem, and sets the reference count to zero. More...
 
int incrRefCount () const
 
int decrRefCount () const
 
int getRefCount () const
 
int getCopyNumber () const
 
Implementationclone () const
 This is a deep copy of the concrete Implementation object, except the Subsystem will have been removed. More...
 
void realizeModel (State &s) const
 
void realizeInstance (const State &s) const
 
void realizeTime (const State &s) const
 
void realizePosition (const State &s) const
 
void realizeVelocity (const State &s) const
 
void realizeDynamics (const State &s) const
 
void realizeAcceleration (const State &s) const
 
void realizeReport (const State &s) const
 
void initialize (State &s) const
 This should be called at the start of a time stepping study to cause this Measure to set its state variables (if any) in the supplied state to their initial conditions. More...
 
int getNumTimeDerivatives () const
 
Stage getDependsOnStage (int derivOrder) const
 
void setSubsystem (Subsystem &sub, MeasureIndex mx)
 
bool isInSubsystem () const
 
const SubsystemgetSubsystem () const
 
SubsystemupdSubsystem ()
 
MeasureIndex getSubsystemMeasureIndex () const
 
SubsystemIndex getSubsystemIndex () const
 
void invalidateTopologyCache () const
 
Stage getStage (const State &s) const
 
virtual ~Implementation ()
 
virtual void realizeMeasureModelVirtual (State &) const
 
virtual void realizeMeasureInstanceVirtual (const State &) const
 
virtual void realizeMeasureTimeVirtual (const State &) const
 
virtual void realizeMeasurePositionVirtual (const State &) const
 
virtual void realizeMeasureVelocityVirtual (const State &) const
 
virtual void realizeMeasureDynamicsVirtual (const State &) const
 
virtual void realizeMeasureReportVirtual (const State &) const
 

Constructor & Destructor Documentation

template<class T>
SimTK::Measure_< T >::Extreme::Implementation::Implementation ( )
inline

Default constructor leaves the operand measure unspecified; no base class cache entries are allocated.

template<class T>
SimTK::Measure_< T >::Extreme::Implementation::Implementation ( const Measure_< T > &  operand,
Operation  op 
)
inline

Construct a measure that returns the extreme value taken on by the operand measure during a time stepping study.

Member Function Documentation

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::setOperandMeasure ( const Measure_< T > &  operand)
inline

Set the operand measure for this Extreme measure; this is a Topology stage change so you'll have to call realizeTopology() again if you call this.

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::setOperation ( Operation  op)
inline

Set the particular operation to be performed by this Extreme measure; this is a Topology stage change so you'll have to call realizeTopology() again if you call this.

template<class T>
const Measure_<T>& SimTK::Measure_< T >::Extreme::Implementation::getOperandMeasure ( ) const
inline

Return a reference to the operand measure for this Extreme measure.

template<class T>
Operation SimTK::Measure_< T >::Extreme::Implementation::getOperation ( ) const
inline

Return the particular operation being performed by this Extreme measure.

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::setValue ( State s,
const T &  value 
) const
inline

Set the current extreme value stored in this Extreme measure's state variable.

template<class T>
Real SimTK::Measure_< T >::Extreme::Implementation::getTimeOfExtremeValue ( const State s) const
inline

Return the time at which the extreme was last updated.

This will be the current time if the operand is currently at its most extreme value, otherwise it will be sometime in the past.

template<class T>
Implementation* SimTK::Measure_< T >::Extreme::Implementation::cloneVirtual ( ) const
inlineoverridevirtual
template<class T>
int SimTK::Measure_< T >::Extreme::Implementation::getNumTimeDerivativesVirtual ( ) const
inlineoverridevirtual

Extreme(f(t)) has the same number of derivatives as f except that they are all zero unless f(t) is a new extreme.

Reimplemented from SimTK::AbstractMeasure::Implementation.

template<class T>
Stage SimTK::Measure_< T >::Extreme::Implementation::getDependsOnStageVirtual ( int  order) const
inlineoverridevirtual

The depends-on stage for this measure is the same as for its operand.

Implements SimTK::AbstractMeasure::Implementation.

template<class T>
const T& SimTK::Measure_< T >::Extreme::Implementation::getUncachedValueVirtual ( const State s,
int  derivOrder 
) const
inlineoverridevirtual

We're not using the Measure_<T> base class cache services, but we do have one of our own.

It looks uncached from the base class point of view which is why we're implementing it here.

Reimplemented from SimTK::Measure_< T >::Implementation.

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::initializeVirtual ( State s) const
inlineoverridevirtual

At start of a time stepping study, this should be called to set the current extreme value to the current value of the operand.

Reimplemented from SimTK::AbstractMeasure::Implementation.

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::realizeMeasureTopologyVirtual ( State s) const
inlineoverridevirtual

Allocate the auto-updated state variable that holds the extreme seen so far.

We'll assume that changes to this variable invalidate Dynamics (force) stage so that any forces that depend on it will be recomputed if it changes. Also allocate an auxiliary boolean variable that is used to hold whether the current value is a new extreme; that is private to the implementation and not user-accessible since you can instead check the time of last update.

Reimplemented from SimTK::Measure_< T >::Implementation.

template<class T>
void SimTK::Measure_< T >::Extreme::Implementation::realizeMeasureAccelerationVirtual ( const State s) const
inlineoverridevirtual

In case no one has updated the value of this measure yet, we have to make sure it gets updated before the integration moves ahead.

Reimplemented from SimTK::AbstractMeasure::Implementation.

template<class T>
bool SimTK::Measure_< T >::Extreme::Implementation::ensureExtremeHasBeenUpdated ( const State s) const
inline

Here we make sure that the cache entry is updated if the current value of the operand is more extreme than the previous one, and return a bool indicating whether we have a new extreme.

We don't want to create an update entry unless the extreme value has changed, because we would like the state variable's last update value to reflect the last actual change.


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