API  4.4
For C++ developers
OpenSim::InverseKinematicsSolver Class Reference

Solve for the coordinates (degrees of freedom) of the model that satisfy the set of constraints imposed on the model and the set of desired coordinate values. More...

+ Inheritance diagram for OpenSim::InverseKinematicsSolver:

Public Member Functions

virtual ~InverseKinematicsSolver ()
 
 InverseKinematicsSolver (const InverseKinematicsSolver &other)=delete
 
InverseKinematicsSolveroperator= (const InverseKinematicsSolver &other)=delete
 
 InverseKinematicsSolver (const Model &model, std::shared_ptr< MarkersReference > markersReference, SimTK::Array_< CoordinateReference > &coordinateReferences, double constraintWeight=SimTK::Infinity)
 
 InverseKinematicsSolver (const Model &model, std::shared_ptr< MarkersReference > markersReference, std::shared_ptr< OrientationsReference > orientationsReference, SimTK::Array_< CoordinateReference > &coordinateReferences, double constraintWeight=SimTK::Infinity)
 
 InverseKinematicsSolver (const Model &model, const MarkersReference &markersReference, SimTK::Array_< CoordinateReference > &coordinateReferences, double constraintWeight=SimTK::Infinity)
 
 InverseKinematicsSolver (const Model &model, const MarkersReference &markersReference, const OrientationsReference &orientationsReference, SimTK::Array_< CoordinateReference > &coordinateReferences, double constraintWeight=SimTK::Infinity)
 
int getNumMarkersInUse () const
 Return the number of markers used to solve for model coordinates. More...
 
int getNumOrientationSensorsInUse () const
 Return the number of orientation sensors used to solve for model coordinates. More...
 
void updateMarkerWeight (const std::string &markerName, double value)
 Change the weighting of a marker, given the marker's name. More...
 
void updateMarkerWeight (int markerIndex, double value)
 Change the weighting of a marker, given the marker's index. More...
 
void updateMarkerWeights (const SimTK::Array_< double > &weights)
 Change the weighting of all markers. More...
 
void updateOrientationWeight (const std::string &orientationName, double value)
 Change the weighting of an orientation sensor, given its name. More...
 
void updateOrientationWeight (int orientationIndex, double value)
 Change the weighting of an orientation sensor, given its index. More...
 
void updateOrientationWeights (const SimTK::Array_< double > &weights)
 Change the weighting of all orientation sensors. More...
 
SimTK::Vec3 computeCurrentMarkerLocation (const std::string &markerName)
 Compute and return a marker's spatial location in the ground frame, given the marker's name. More...
 
SimTK::Vec3 computeCurrentMarkerLocation (int markerIndex)
 Compute and return a marker's spatial location in the ground frame, given the marker's index. More...
 
void computeCurrentMarkerLocations (SimTK::Array_< SimTK::Vec3 > &markerLocations)
 Compute and return the spatial locations of all markers, expressed in the ground frame. More...
 
double computeCurrentMarkerError (const std::string &markerName)
 Compute and return the distance error between a model marker and its observation, given the marker's name. More...
 
double computeCurrentMarkerError (int markerIndex)
 Compute and return the distance error between a model marker and its observation, given the marker's index. More...
 
void computeCurrentMarkerErrors (SimTK::Array_< double > &markerErrors)
 Compute and return the distance errors between all model markers and their observations. More...
 
double computeCurrentSquaredMarkerError (const std::string &markerName)
 Compute and return the squared-distance error between a model marker and its observation, given the marker's name. More...
 
double computeCurrentSquaredMarkerError (int markerIndex)
 Compute and return the squared-distance error between a model marker and its observation, given the marker's index. More...
 
void computeCurrentSquaredMarkerErrors (SimTK::Array_< double > &markerErrors)
 Compute and return the squared-distance errors between all model markers and their observations. More...
 
std::string getMarkerNameForIndex (int markerIndex) const
 Marker locations and errors may be computed in an order that is different from tasks file or listed in the model. More...
 
SimTK::Rotation computeCurrentSensorOrientation (const std::string &osensorName)
 Compute and return an orientation sensor's spatial orientation in the ground frame, given the o-sensor's name. More...
 
SimTK::Rotation computeCurrentSensorOrientation (int osensorIndex)
 Compute and return an orientation sensor's spatial orientation in the ground frame, given the o-sensor's index. More...
 
void computeCurrentSensorOrientations (SimTK::Array_< SimTK::Rotation > &osensorOrientations)
 Compute and return the spatial orientations of all o-sensors, expressed in the ground frame. More...
 
double computeCurrentOrientationError (const std::string &osensorName)
 Compute and return the orientation error between the model orientation sensor and its observation, given the o-sensor's name. More...
 
double computeCurrentOrientationError (int osensorIndex)
 Compute and return the orientation error between the model orientation sensor and its observation, given the o-sensor's index. More...
 
void computeCurrentOrientationErrors (SimTK::Array_< double > &osensorErrors)
 Compute all the orientation errors between the model orientation sensors and their observations. More...
 
std::string getOrientationSensorNameForIndex (int osensorIndex) const
 Orientation sensor locations and errors may be computed in an order that may be different from tasks file or listed in the model. More...
 
void setAdvanceTimeFromReference (bool newValue)
 indicate whether time is provided by Reference objects or driver program More...
 
- Public Member Functions inherited from OpenSim::AssemblySolver
 AssemblySolver (const Model &model, const SimTK::Array_< CoordinateReference > &coordinateReferences, double constraintWeight=SimTK::Infinity)
 Construct an Assembly solver with the coordinate references as the goal of the assembly and (optional)constraint weight. More...
 
virtual ~AssemblySolver ()
 
void setAccuracy (double accuracy)
 Set the unitless accuracy of the assembly solution, which dictates the number of significant digits the solution should be resolved to. More...
 
void setConstraintWeight (double weight)
 Set the relative weighting for constraints. More...
 
const SimTK::Array_< CoordinateReference > & getCoordinateReferences () const
 Specify which coordinates to match, each with a desired value and a relative weighting. More...
 
void updateCoordinateReference (const std::string &coordName, double value, double weight=1.0)
 Once a set of coordinates has been specified its reference value and weight can be updated directly. More...
 
virtual void assemble (SimTK::State &s)
 Assemble a model configuration that meets the assembly conditions (desired values and constraints) and accuracy, starting from an initial state that does not have to satisfy the constraints. More...
 
virtual void track (SimTK::State &s)
 Obtain a model configuration that meets the assembly conditions (desired values and constraints) given a state that satisfies or is close to satisfying the constraints. More...
 
const SimTK::Assembler & getAssembler () const
 Read access to the underlying SimTK::Assembler. More...
 
void assign (Object &aObject) override
 This allows copy assignment in the Java GUI. More...
 
AssemblySolverclone () const override
 Create a new heap-allocated copy of the concrete object to which this Object refers. More...
 
const std::string & getConcreteClassName () const override
 Returns the class name of the concrete Object-derived class of the actual object referenced by this Object, as a string. More...
 
- Public Member Functions inherited from OpenSim::Solver
virtual ~Solver ()
 
 Solver (const Model &model)
 
const ModelgetModel () const
 
void assign (Object &aObject) override
 This allows copy assignment in the Java GUI. More...
 
- Public Member Functions inherited from OpenSim::Object
virtual ~Object ()
 Virtual destructor for cleanup. More...
 
bool isEqualTo (const Object &aObject) const
 Equality operator wrapper for use from languages not supporting operator overloading. More...
 
Objectoperator= (const Object &aObject)
 Copy assignment copies he base class fields, including the properties. More...
 
virtual bool operator== (const Object &aObject) const
 Determine if two objects are equal. More...
 
virtual bool operator< (const Object &aObject) const
 Provide an ordering for objects so they can be put in sorted containers. More...
 
void setName (const std::string &name)
 Set the name of the Object. More...
 
const std::string & getName () const
 Get the name of this Object. More...
 
void setDescription (const std::string &description)
 Set description, a one-liner summary. More...
 
const std::string & getDescription () const
 Get description, a one-liner summary. More...
 
const std::string & getAuthors () const
 Get Authors of this Object. More...
 
void setAuthors (const std::string &authors)
 Set Authors of this object. More...
 
const std::string & getReferences () const
 Get references or publications to cite if using this object. More...
 
void setReferences (const std::string &references)
 Set references or publications to cite if using this object. More...
 
int getNumProperties () const
 Determine how many properties are stored with this Object. More...
 
const AbstractPropertygetPropertyByIndex (int propertyIndex) const
 Get a const reference to a property by its index number, returned as an AbstractProperty. More...
 
AbstractPropertyupdPropertyByIndex (int propertyIndex)
 Get a writable reference to a property by its index number, returned as an AbstractProperty. More...
 
bool hasProperty (const std::string &name) const
 Return true if this Object has a property of any type with the given name, which must not be empty. More...
 
const AbstractPropertygetPropertyByName (const std::string &name) const
 Get a const reference to a property by its name, returned as an AbstractProperty. More...
 
AbstractPropertyupdPropertyByName (const std::string &name)
 Get a writable reference to a property by its name, returned as an AbstractProperty. More...
 
template<class T >
bool hasProperty () const
 Return true if this Object contains an unnamed, one-object property that contains objects of the given template type T. More...
 
template<class T >
const Property< T > & getProperty (const PropertyIndex &index) const
 Get property of known type Property<T> as a const reference; the property must be present and have the right type. More...
 
template<class T >
Property< T > & updProperty (const PropertyIndex &index)
 Get property of known type Property<T> as a writable reference; the property must be present and have the right type. More...
 
bool isObjectUpToDateWithProperties () const
 Returns true if no property's value has changed since the last time setObjectIsUpToDateWithProperties() was called. More...
 
void readObjectFromXMLNodeOrFile (SimTK::Xml::Element &objectElement, int versionNumber)
 We're given an XML element from which we are to populate this Object. More...
 
virtual void updateFromXMLNode (SimTK::Xml::Element &objectElement, int versionNumber)
 Use this method to deserialize an object from a SimTK::Xml::Element. More...
 
void updateXMLNode (SimTK::Xml::Element &parent, const AbstractProperty *prop=nullptr) const
 Serialize this object into the XML node that represents it. More...
 
bool getInlined () const
 Inlined means an in-memory Object that is not associated with an XMLDocument. More...
 
void setInlined (bool aInlined, const std::string &aFileName="")
 Mark this as inlined or not and optionally provide a file name to associate with the new XMLDocument for the non-inline case. More...
 
std::string getDocumentFileName () const
 If there is a document associated with this object then return the file name maintained by the document. More...
 
int getDocumentFileVersion () const
 If there is a document associated with this object then return its version number. More...
 
void setAllPropertiesUseDefault (bool aUseDefault)
 
bool print (const std::string &fileName) const
 Write this Object into an XML file of the given name; conventionally the suffix to use is ".osim". More...
 
std::string dump () const
 dump the XML representation of this Object into an std::string and return it. More...
 
virtual bool isA (const char *type) const
 The default implementation returns true only if the supplied string is "Object"; each Object-derived class overrides this to match its own class name. More...
 
const std::string & toString () const
 Wrapper to be used on Java side to display objects in tree; this returns just the object's name. More...
 
PropertySetgetPropertySet ()
 OBSOLETE: Get a reference to the PropertySet maintained by the Object. More...
 
const PropertySetgetPropertySet () const
 

Protected Member Functions

void setupGoals (SimTK::State &s) override
 Override to include point of interest matching (Marker tracking) as well ad Frame orientation (OSensor) tracking. More...
 
void updateGoals (SimTK::State &s) override
 Internal method to update the time, reference values and/or their weights that define the goals, based on the provided state. More...
 
- Protected Member Functions inherited from OpenSim::AssemblySolver
SimTK::Assembler & updAssembler ()
 Write access to the underlying SimTK::Assembler. More...
 
- Protected Member Functions inherited from OpenSim::Object
 Object ()
 The default constructor is only for use by constructors of derived types. More...
 
 Object (const std::string &fileName, bool aUpdateFromXMLNode=true)
 Constructor from a file, to be called from other constructors that take a file as input. More...
 
 Object (const Object &source)
 Copy constructor is invoked automatically by derived classes with default copy constructors; otherwise it must be invoked explicitly. More...
 
 Object (SimTK::Xml::Element &aElement)
 Construct the base class portion of an Object from a given Xml element that describes this Object. More...
 
template<class T >
PropertyIndex addProperty (const std::string &name, const std::string &comment, const T &value)
 Define a new single-value property of known type T, with the given name, associated comment, and initial value. More...
 
template<class T >
PropertyIndex addOptionalProperty (const std::string &name, const std::string &comment)
 Add an optional property, meaning it can contain either no value or a single value. More...
 
template<class T >
PropertyIndex addOptionalProperty (const std::string &name, const std::string &comment, const T &value)
 Add an optional property, meaning it can contain either no value or a single value. More...
 
template<class T >
PropertyIndex addListProperty (const std::string &name, const std::string &comment, int minSize, int maxSize)
 Define a new list-valued property of known type T, with the given name, associated comment, minimum (==0) and maximum (>0) allowable list lengths, and a zero-length initial value. More...
 
template<class T , template< class > class Container>
PropertyIndex addListProperty (const std::string &name, const std::string &comment, int minSize, int maxSize, const Container< T > &valueList)
 Define a new list-valued property as above, but assigning an initial value via some templatized container class that supports size() and indexing. More...
 
PropertyIndex getPropertyIndex (const std::string &name) const
 Look up a property by name and return its PropertyIndex if it is found. More...
 
template<class T >
PropertyIndex getPropertyIndex () const
 Look up an unnamed property by the type of object it contains, and return its PropertyIndex if it is found. More...
 
template<class T >
void checkPropertyValueIsPositive (const Property< T > &p) const
 Throw an exception if any of the property's values are not positive. More...
 
template<class T >
void checkPropertyValueIsInSet (const Property< T > &p, const std::set< T > &set) const
 Throw an exception if any of the property's values are not in the provided set. More...
 
template<class T >
void checkPropertyValueIsInRangeOrSet (const Property< T > &p, const T &lower, const T &upper, const std::set< T > &set) const
 Throw an exception if any of the property's values are neither in the provided range nor in the provided set. More...
 
void setObjectIsUpToDateWithProperties ()
 When an object is initialized using the current values of its properties, it can set a flag indicating that it is up to date. More...
 
void clearObjectIsUpToDateWithProperties ()
 For testing or debugging purposes, manually clear the "object is up to date with respect to properties" flag. More...
 
void makeObjectNamesConsistentWithProperties ()
 Make sure the name of an object is consistent with its property type. More...
 
void updateFromXMLDocument ()
 Use this method only if you're deserializing from a file and the object is at the top level; that is, primarily in constructors that take a file name as input. More...
 
void setDocument (XMLDocument *doc)
 Unconditionally set the XMLDocument associated with this object. More...
 
const XMLDocumentgetDocument () const
 Get a const pointer to the document (if any) associated with this object. More...
 
XMLDocumentupdDocument ()
 Get a writable pointer to the document (if any) associated with this object. More...
 

Additional Inherited Members

- Public Types inherited from OpenSim::AssemblySolver
typedef AssemblySolver Self
 This typedef might be useful within the member functions of this class. More...
 
typedef Solver Super
 Use this typedef to refer to the superclass of this class. More...
 
- Public Types inherited from OpenSim::Solver
typedef Solver Self
 This typedef might be useful within the member functions of this class. More...
 
typedef Object Super
 Use this typedef to refer to the superclass of this class. More...
 
- Static Public Member Functions inherited from OpenSim::AssemblySolver
static AssemblySolversafeDownCast (OpenSim::Object *obj)
 For use in MATLAB and Python to access the concrete class. More...
 
static const std::string & getClassName ()
 This returns "AssemblySolver". More...
 
- Static Public Member Functions inherited from OpenSim::Solver
static SolversafeDownCast (OpenSim::Object *obj)
 For use in MATLAB and Python to access the concrete class. More...
 
static const std::string & getClassName ()
 This returns "Solver". More...
 
- Static Public Member Functions inherited from OpenSim::Object
static void registerType (const Object &defaultObject)
 Register an instance of a class; if the class is already registered it will be replaced. More...
 
static void renameType (const std::string &oldTypeName, const std::string &newTypeName)
 Support versioning by associating the current Object type with an old name. More...
 
static const ObjectgetDefaultInstanceOfType (const std::string &concreteClassName)
 Return a pointer to the default instance of the registered (concrete) Object whose class name is given, or NULL if the type is not registered. More...
 
template<class T >
static bool isObjectTypeDerivedFrom (const std::string &concreteClassName)
 Return true if the given concrete object type represents a subclass of the template object type T, and thus could be referenced with a T*. More...
 
static ObjectnewInstanceOfType (const std::string &concreteClassName)
 Create a new instance of the concrete Object type whose class name is given as concreteClassName. More...
 
static void getRegisteredTypenames (Array< std::string > &typeNames)
 Retrieve all the typenames registered so far. More...
 
template<class T >
static void getRegisteredObjectsOfGivenType (ArrayPtrs< T > &rArray)
 Return an array of pointers to the default instances of all registered (concrete) Object types that derive from a given Object-derived type that does not have to be concrete. More...
 
static bool PrintPropertyInfo (std::ostream &os, const std::string &classNameDotPropertyName, bool printFlagInfo=true)
 Dump formatted property information to a given output stream, useful for creating a "help" facility for registered objects. More...
 
static bool PrintPropertyInfo (std::ostream &os, const std::string &className, const std::string &propertyName, bool printFlagInfo=true)
 Same as the other signature but the class name and property name are provided as two separate strings. More...
 
static ObjectmakeObjectFromFile (const std::string &fileName)
 Create an OpenSim object whose type is based on the tag at the root node of the XML file passed in. More...
 
static const std::string & getClassName ()
 Return the name of this class as a string; i.e., "Object". More...
 
static void setSerializeAllDefaults (bool shouldSerializeDefaults)
 Static function to control whether all registered objects and their properties are written to the defaults section of output files rather than only those values for which the default was explicitly overwritten when read in from an input file or set programmatically. More...
 
static bool getSerializeAllDefaults ()
 Report the value of the "serialize all defaults" flag. More...
 
static bool isKindOf (const char *type)
 Returns true if the passed-in string is "Object"; each Object-derived class defines a method of this name for its own class name. More...
 
static void setDebugLevel (int newLevel)
 Set the amount of logging output. More...
 
static int getDebugLevel ()
 Get the current setting of debug level. More...
 
static ObjectSafeCopy (const Object *aObject)
 Use the clone() method to duplicate the given object unless the pointer is null in which case null is returned. More...
 
static void RegisterType (const Object &defaultObject)
 OBSOLETE alternate name for registerType(). More...
 
static void RenameType (const std::string &oldName, const std::string &newName)
 OBSOLETE alternate name for renameType(). More...
 
- Static Public Attributes inherited from OpenSim::Object
static const std::string DEFAULT_NAME
 Name used for default objects when they are serialized. More...
 
- Protected Attributes inherited from OpenSim::Object
PropertySet _propertySet
 OBSOLETE: Property_Deprecated set for serializable member variables of this and derived classes. More...
 

Detailed Description

Solve for the coordinates (degrees of freedom) of the model that satisfy the set of constraints imposed on the model and the set of desired coordinate values.

The InverseKinematicsSolver provides the option to convert the problem to an approximate one where the constraint violations are treated as penalties to be minimized rather than strictly enforced. This can speed up the solution and can be used to seed the constrained problem closer to the solution.

The InverseKinematicsSolver objective:

\[ min: J = sum(Wm_i*(m_i-md_i)^T*(m_i-md_i)) + sum(Wq_j*(q_j-qd_j)^2) + [Wc*sum(c_{err})^2] \]

where m_i and md_i are the model and desired marker locations (Vec3); q_j and qd_j are model and desired joint coordinates. Wm_i and Wq_j are the marker and coordinate weightings, respectively, and Wc is the weighting on constraint errors. When Wc == Infinity, the second term is not included, but instead q is subject to the constraint equations:

\[ c_{err} = G(q)-Go = 0 \]

When the model (and the number of goals) is guaranteed not to change and the initial state is close to the InverseKinematics solution (e.g., from the initial assemble()), then track() is an efficient method for updating the configuration to determine the small change in coordinate values, q.

See SimTK::Assembler for more algorithmic details of the underlying solver.

Author
Ajay Seth

Constructor & Destructor Documentation

◆ ~InverseKinematicsSolver()

virtual OpenSim::InverseKinematicsSolver::~InverseKinematicsSolver ( )
inlinevirtual

◆ InverseKinematicsSolver() [1/5]

OpenSim::InverseKinematicsSolver::InverseKinematicsSolver ( const InverseKinematicsSolver other)
delete

◆ InverseKinematicsSolver() [2/5]

OpenSim::InverseKinematicsSolver::InverseKinematicsSolver ( const Model model,
std::shared_ptr< MarkersReference markersReference,
SimTK::Array_< CoordinateReference > &  coordinateReferences,
double  constraintWeight = SimTK::Infinity 
)

◆ InverseKinematicsSolver() [3/5]

OpenSim::InverseKinematicsSolver::InverseKinematicsSolver ( const Model model,
std::shared_ptr< MarkersReference markersReference,
std::shared_ptr< OrientationsReference orientationsReference,
SimTK::Array_< CoordinateReference > &  coordinateReferences,
double  constraintWeight = SimTK::Infinity 
)

◆ InverseKinematicsSolver() [4/5]

OpenSim::InverseKinematicsSolver::InverseKinematicsSolver ( const Model model,
const MarkersReference markersReference,
SimTK::Array_< CoordinateReference > &  coordinateReferences,
double  constraintWeight = SimTK::Infinity 
)
inline

◆ InverseKinematicsSolver() [5/5]

OpenSim::InverseKinematicsSolver::InverseKinematicsSolver ( const Model model,
const MarkersReference markersReference,
const OrientationsReference orientationsReference,
SimTK::Array_< CoordinateReference > &  coordinateReferences,
double  constraintWeight = SimTK::Infinity 
)
inline

Member Function Documentation

◆ computeCurrentMarkerError() [1/2]

double OpenSim::InverseKinematicsSolver::computeCurrentMarkerError ( const std::string &  markerName)

Compute and return the distance error between a model marker and its observation, given the marker's name.

◆ computeCurrentMarkerError() [2/2]

double OpenSim::InverseKinematicsSolver::computeCurrentMarkerError ( int  markerIndex)

Compute and return the distance error between a model marker and its observation, given the marker's index.

◆ computeCurrentMarkerErrors()

void OpenSim::InverseKinematicsSolver::computeCurrentMarkerErrors ( SimTK::Array_< double > &  markerErrors)

Compute and return the distance errors between all model markers and their observations.

◆ computeCurrentMarkerLocation() [1/2]

SimTK::Vec3 OpenSim::InverseKinematicsSolver::computeCurrentMarkerLocation ( const std::string &  markerName)

Compute and return a marker's spatial location in the ground frame, given the marker's name.

◆ computeCurrentMarkerLocation() [2/2]

SimTK::Vec3 OpenSim::InverseKinematicsSolver::computeCurrentMarkerLocation ( int  markerIndex)

Compute and return a marker's spatial location in the ground frame, given the marker's index.

◆ computeCurrentMarkerLocations()

void OpenSim::InverseKinematicsSolver::computeCurrentMarkerLocations ( SimTK::Array_< SimTK::Vec3 > &  markerLocations)

Compute and return the spatial locations of all markers, expressed in the ground frame.

◆ computeCurrentOrientationError() [1/2]

double OpenSim::InverseKinematicsSolver::computeCurrentOrientationError ( const std::string &  osensorName)

Compute and return the orientation error between the model orientation sensor and its observation, given the o-sensor's name.

◆ computeCurrentOrientationError() [2/2]

double OpenSim::InverseKinematicsSolver::computeCurrentOrientationError ( int  osensorIndex)

Compute and return the orientation error between the model orientation sensor and its observation, given the o-sensor's index.

◆ computeCurrentOrientationErrors()

void OpenSim::InverseKinematicsSolver::computeCurrentOrientationErrors ( SimTK::Array_< double > &  osensorErrors)

Compute all the orientation errors between the model orientation sensors and their observations.

◆ computeCurrentSensorOrientation() [1/2]

SimTK::Rotation OpenSim::InverseKinematicsSolver::computeCurrentSensorOrientation ( const std::string &  osensorName)

Compute and return an orientation sensor's spatial orientation in the ground frame, given the o-sensor's name.

◆ computeCurrentSensorOrientation() [2/2]

SimTK::Rotation OpenSim::InverseKinematicsSolver::computeCurrentSensorOrientation ( int  osensorIndex)

Compute and return an orientation sensor's spatial orientation in the ground frame, given the o-sensor's index.

◆ computeCurrentSensorOrientations()

void OpenSim::InverseKinematicsSolver::computeCurrentSensorOrientations ( SimTK::Array_< SimTK::Rotation > &  osensorOrientations)

Compute and return the spatial orientations of all o-sensors, expressed in the ground frame.

◆ computeCurrentSquaredMarkerError() [1/2]

double OpenSim::InverseKinematicsSolver::computeCurrentSquaredMarkerError ( const std::string &  markerName)

Compute and return the squared-distance error between a model marker and its observation, given the marker's name.

This method is cheaper than squaring the value returned by computeCurrentMarkerError().

◆ computeCurrentSquaredMarkerError() [2/2]

double OpenSim::InverseKinematicsSolver::computeCurrentSquaredMarkerError ( int  markerIndex)

Compute and return the squared-distance error between a model marker and its observation, given the marker's index.

This method is cheaper than squaring the value returned by computeCurrentMarkerError().

◆ computeCurrentSquaredMarkerErrors()

void OpenSim::InverseKinematicsSolver::computeCurrentSquaredMarkerErrors ( SimTK::Array_< double > &  markerErrors)

Compute and return the squared-distance errors between all model markers and their observations.

This method is cheaper than squaring the values returned by computeCurrentMarkerErrors().

◆ getMarkerNameForIndex()

std::string OpenSim::InverseKinematicsSolver::getMarkerNameForIndex ( int  markerIndex) const

Marker locations and errors may be computed in an order that is different from tasks file or listed in the model.

Return the corresponding marker name for an index in the list of marker locations/errors returned by the solver.

◆ getNumMarkersInUse()

int OpenSim::InverseKinematicsSolver::getNumMarkersInUse ( ) const

Return the number of markers used to solve for model coordinates.

It is a count of the number of markers in the intersection of the reference markers and model markers. This number is guaranteed not to change after assemble() is called (i.e. during subsequent calls to track()).

◆ getNumOrientationSensorsInUse()

int OpenSim::InverseKinematicsSolver::getNumOrientationSensorsInUse ( ) const

Return the number of orientation sensors used to solve for model coordinates.

It is a count of the number of orientation sensors that intersect the reference orientations and model reference frames with the same name. This number is guaranteed not to change after assemble() is called (i.e. during subsequent calls to track()).

◆ getOrientationSensorNameForIndex()

std::string OpenSim::InverseKinematicsSolver::getOrientationSensorNameForIndex ( int  osensorIndex) const

Orientation sensor locations and errors may be computed in an order that may be different from tasks file or listed in the model.

Return the corresponding orientation sensor name for an index in the list of orientations returned by the solver.

◆ operator=()

InverseKinematicsSolver& OpenSim::InverseKinematicsSolver::operator= ( const InverseKinematicsSolver other)
delete

◆ setAdvanceTimeFromReference()

void OpenSim::InverseKinematicsSolver::setAdvanceTimeFromReference ( bool  newValue)
inline

indicate whether time is provided by Reference objects or driver program

◆ setupGoals()

void OpenSim::InverseKinematicsSolver::setupGoals ( SimTK::State &  s)
overrideprotectedvirtual

Override to include point of interest matching (Marker tracking) as well ad Frame orientation (OSensor) tracking.

This method extends the set of goals used by the AssemblySolver.

Reimplemented from OpenSim::AssemblySolver.

◆ updateGoals()

void OpenSim::InverseKinematicsSolver::updateGoals ( SimTK::State &  s)
overrideprotectedvirtual

Internal method to update the time, reference values and/or their weights that define the goals, based on the provided state.

Reimplemented from OpenSim::AssemblySolver.

◆ updateMarkerWeight() [1/2]

void OpenSim::InverseKinematicsSolver::updateMarkerWeight ( const std::string &  markerName,
double  value 
)

Change the weighting of a marker, given the marker's name.

Takes effect when assemble() or track() is called next.

◆ updateMarkerWeight() [2/2]

void OpenSim::InverseKinematicsSolver::updateMarkerWeight ( int  markerIndex,
double  value 
)

Change the weighting of a marker, given the marker's index.

Takes effect when assemble() or track() is called next.

◆ updateMarkerWeights()

void OpenSim::InverseKinematicsSolver::updateMarkerWeights ( const SimTK::Array_< double > &  weights)

Change the weighting of all markers.

Takes effect when assemble() or track() is called next. Marker weights are specified in the same order as they appear in the MarkersReference that was passed in when the solver was constructed.

◆ updateOrientationWeight() [1/2]

void OpenSim::InverseKinematicsSolver::updateOrientationWeight ( const std::string &  orientationName,
double  value 
)

Change the weighting of an orientation sensor, given its name.

Takes effect when assemble() or track() is called next.

◆ updateOrientationWeight() [2/2]

void OpenSim::InverseKinematicsSolver::updateOrientationWeight ( int  orientationIndex,
double  value 
)

Change the weighting of an orientation sensor, given its index.

Takes effect when assemble() or track() is called next.

◆ updateOrientationWeights()

void OpenSim::InverseKinematicsSolver::updateOrientationWeights ( const SimTK::Array_< double > &  weights)

Change the weighting of all orientation sensors.

Takes effect when assemble() or track() is called next. Orientation weights are specified in the same order as they appear in the OrientationsReference that was passed in when the solver was constructed.


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