constraint_samplers::JointConstraintSampler Class Reference

JointConstraintSampler is a class that allows the sampling of joints in a particular group of the robot, subject to a set of individual joint constraints. More...

`#include <default_constraint_samplers.h>`

Inheritance diagram for constraint_samplers::JointConstraintSampler:

## Classes | |

struct | JointInfo |

An internal structure used for maintaining constraints on a particular joint. More... | |

## Public Member Functions | |

virtual bool | configure (const moveit_msgs::Constraints &constr) |

Configures a joint constraint given a Constraints message. | |

bool | configure (const std::vector< kinematic_constraints::JointConstraint > &jc) |

Configures a joint constraint given a vector of constraints. | |

std::size_t | getConstrainedJointCount () const |

Gets the number of constrained joints - joints that have an additional bound beyond the joint limits. | |

std::size_t | getUnconstrainedJointCount () const |

Gets the number of unconstrained joints - joint that have no additional bound beyond the joint limits. | |

JointConstraintSampler (const planning_scene::PlanningSceneConstPtr &scene, const std::string &group_name) | |

virtual bool | project (robot_state::JointStateGroup *jsg, const robot_state::RobotState &reference_state, unsigned int max_attempts) |

Project a sample given the constraints, updating the joint state group. This function allows the parameter max_attempts to be set. | |

virtual bool | sample (robot_state::JointStateGroup *jsg, const robot_state::RobotState &ks, unsigned int max_attempts) |

Samples given the constraints, populating the joint state group. This function allows the parameter max_attempts to be set. | |

## Protected Member Functions | |

virtual void | clear () |

Clears all data from the constraint. | |

## Protected Attributes | |

std::vector< JointInfo > | bounds_ |

The bounds for any joint with bounds that are more restrictive than the joint limits. | |

random_numbers::RandomNumberGenerator | random_number_generator_ |

Random number generator used to sample. | |

std::vector< unsigned int > | uindex_ |

The index of the unbounded joints in the joint state vector. | |

std::vector< const robot_model::JointModel * > | unbounded_ |

The joints that are not bounded except by joint limits. | |

std::vector< double > | values_ |

Values associated with this group to avoid continuously reallocating. |

JointConstraintSampler is a class that allows the sampling of joints in a particular group of the robot, subject to a set of individual joint constraints.

The set of individual joint constraint reduce the allowable bounds used in the sampling. Unconstrained values will be sampled within their limits.

Definition at line 55 of file default_constraint_samplers.h.

constraint_samplers::JointConstraintSampler::JointConstraintSampler | ( | const planning_scene::PlanningSceneConstPtr & | scene, |

const std::string & | group_name |
||

) | ` [inline]` |

Constructor

**Parameters:**-
[in] scene The planning scene used to check the constraint [in] group_name The group name associated with the constraint. Will be invalid if no group name is passed in or the joint model group cannot be found in the kinematic model

Definition at line 69 of file default_constraint_samplers.h.

void constraint_samplers::JointConstraintSampler::clear | ( | ) | ` [protected, virtual]` |

Clears all data from the constraint.

Reimplemented from constraint_samplers::ConstraintSampler.

Definition at line 187 of file default_constraint_samplers.cpp.

bool constraint_samplers::JointConstraintSampler::configure | ( | const moveit_msgs::Constraints & | constr | ) | ` [virtual]` |

Configures a joint constraint given a Constraints message.

If more than one constraint for a particular joint is specified, the most restrictive set of bounds will be used (highest minimum value, lowest maximum value). For the configuration to be successful, the following condition must be met, in addition to the conditions specified in configure(const std::vector<kinematic_constraints::JointConstraint> &jc) :

- The Constraints message must contain one or more valid joint constraints (where validity is judged by the ability to configure a JointConstraint)

**Parameters:**-
[in] constr The message containing the constraints

**Returns:**- True if the conditions are met, otherwise false

Implements constraint_samplers::ConstraintSampler.

Definition at line 43 of file default_constraint_samplers.cpp.

bool constraint_samplers::JointConstraintSampler::configure | ( | const std::vector< kinematic_constraints::JointConstraint > & | jc | ) |

Configures a joint constraint given a vector of constraints.

If more than one constraint for a particular joint is specified, the most restrictive set of bounds will be used (highest minimum value, lowest_maximum value. For the configuration to be successful, the following conditions must be met:

- The vector must contain one or more valid, enabled joint constraints

- At least one constraint must reference a joint in the indicated group. If no additional bounds exist for this group, then robot_state::JointStateGroup::setToRandomValues can be used to generate a sample independently from the constraint_samplers infrastructure.

- The constraints must allow a sampleable region for all joints, where the most restrictive minimum bound is less than the most restrictive maximum bound

**Parameters:**-
[in] jc The vector of joint constraints

**Returns:**- True if the conditions are met, otherwise false

Definition at line 57 of file default_constraint_samplers.cpp.

std::size_t constraint_samplers::JointConstraintSampler::getConstrainedJointCount | ( | ) | const` [inline]` |

Gets the number of constrained joints - joints that have an additional bound beyond the joint limits.

**Returns:**- The number of constrained joints.

Definition at line 135 of file default_constraint_samplers.h.

std::size_t constraint_samplers::JointConstraintSampler::getUnconstrainedJointCount | ( | ) | const` [inline]` |

Gets the number of unconstrained joints - joint that have no additional bound beyond the joint limits.

**Returns:**- The number of unconstrained joints.

Definition at line 146 of file default_constraint_samplers.h.

bool constraint_samplers::JointConstraintSampler::project | ( | robot_state::JointStateGroup * | jsg, |

const robot_state::RobotState & | reference_state, |
||

unsigned int | max_attempts |
||

) | ` [virtual]` |

Project a sample given the constraints, updating the joint state group. This function allows the parameter max_attempts to be set.

**Parameters:**-
[out] jsg The joint state group which specifies the state to be projected, according to the constraints [in] reference_state Reference state that will be used to do transforms or perform other actions [in] max_attempts The maximum number of times to attempt to draw a sample. If no sample has been drawn in this number of attempts, false will be returned.

**Returns:**- True if a sample was successfully projected, false otherwise

Implements constraint_samplers::ConstraintSampler.

Definition at line 180 of file default_constraint_samplers.cpp.

bool constraint_samplers::JointConstraintSampler::sample | ( | robot_state::JointStateGroup * | jsg, |

const robot_state::RobotState & | reference_state, |
||

unsigned int | max_attempts |
||

) | ` [virtual]` |

Samples given the constraints, populating the joint state group. This function allows the parameter max_attempts to be set.

**Parameters:**-
[out] jsg The joint state group into which the values will be placed [in] reference_state Reference state that will be used to do transforms or perform other actions [in] max_attempts The maximum number of times to attempt to draw a sample. If no sample has been drawn in this number of attempts, false will be returned.

**Returns:**- True if a sample was successfully taken, false otherwise

Implements constraint_samplers::ConstraintSampler.

Definition at line 144 of file default_constraint_samplers.cpp.

std::vector<JointInfo> constraint_samplers::JointConstraintSampler::bounds_` [protected]` |

The bounds for any joint with bounds that are more restrictive than the joint limits.

Definition at line 190 of file default_constraint_samplers.h.

random_numbers::RandomNumberGenerator constraint_samplers::JointConstraintSampler::random_number_generator_` [protected]` |

Random number generator used to sample.

Definition at line 189 of file default_constraint_samplers.h.

std::vector<unsigned int> constraint_samplers::JointConstraintSampler::uindex_` [protected]` |

The index of the unbounded joints in the joint state vector.

Definition at line 193 of file default_constraint_samplers.h.

std::vector<const robot_model::JointModel*> constraint_samplers::JointConstraintSampler::unbounded_` [protected]` |

The joints that are not bounded except by joint limits.

Definition at line 192 of file default_constraint_samplers.h.

std::vector<double> constraint_samplers::JointConstraintSampler::values_` [protected]` |

Values associated with this group to avoid continuously reallocating.

Definition at line 194 of file default_constraint_samplers.h.

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

moveit_core

Author(s): Ioan Sucan, Sachin Chitta , Acorn Pooley

autogenerated on Mon Oct 6 2014 02:24:48

Author(s): Ioan Sucan

autogenerated on Mon Oct 6 2014 02:24:48