JointEventSource Class Reference

The event generator class. More...

#include <JointEventSource.hh>

Inherits EventSource.

Public Types

enum  Range {
  POSITION, ANGLE, VELOCITY, FORCE,
  INVALID
}
 The type of data range measured. More...
 

Public Member Functions

 JointEventSource (transport::PublisherPtr _pub, physics::WorldPtr _world)
 Constructor. More...
 
void Emit (const std::string &_data) const
 emit an event with data to the internal publisher (and using the internal type) More...
 
void Info () const
 Prints data about the event source to the log (useful for debug) More...
 
virtual void Init ()
 Initialize the event. More...
 
virtual bool IsActive () const
 An event source can be used to enable other events. More...
 
virtual void Load (const sdf::ElementPtr _sdf)
 Loads the full name of the model and the triggers from the world file. More...
 
void Update ()
 Called every simulation step. More...
 

Protected Attributes

bool active
 True if the event source is active. More...
 
std::string name
 Name of the event. More...
 
transport::PublisherPtr pub
 a way to send messages to the other topics (to the REST) More...
 
std::string type
 Type of event. More...
 
physics::WorldPtr world
 Pointer to the world. More...
 

Detailed Description

The event generator class.

Events are generated when joint enters or leaves a certain trigger state. This type of event works with joints that have a single axis (revolute or prismatic). These are the most common for actuated joints. Triggers must be defined in the world, but models can be created during the simulation. Triggers cannot overlap.

///
///  This is an example joint event. It is triggered when the joint named
///  "joint" in the model "revoluter" has an angle value that enters or
///  leaves the range [3, 3.1416]. Triggers can also depend on the position,
///  velocity or applied force.
///
///  <event>
///    <name>joint_angle</name>
///    <type>joint</type>
///    <model>revoluter</model>
///    <joint>joint</joint>
///    <range>
///      <type>normalized_angle</type>
///      <min>3</min>
///      <max>3.1416</max>
///    </range>
///  </event>
///
/// 

Member Enumeration Documentation

§ Range

enum Range

The type of data range measured.

Enumerator
POSITION 

Absolute position (or angle, for revolute joints)

ANGLE 

Normalized angle (between -PI and PI)

VELOCITY 

Velocity or angular velocity.

FORCE 

Applied force (or torque, for revolute joints)

INVALID 

invalid

Constructor & Destructor Documentation

§ JointEventSource()

Constructor.

Parameters
[in]_pubthe publisher for the SimEvents
[in]_worldPointer to the world.

Member Function Documentation

§ Emit()

void Emit ( const std::string &  _data) const
inherited

emit an event with data to the internal publisher (and using the internal type)

Parameters
[in]_datathe JSON data related to this event.

§ Info()

void Info ( ) const

Prints data about the event source to the log (useful for debug)

§ Init()

virtual void Init ( )
virtual

Initialize the event.

Reimplemented from EventSource.

§ IsActive()

virtual bool IsActive ( ) const
virtualinherited

An event source can be used to enable other events.

Inactive events do not generate an message when Emit is called.

Returns
true if the event is active

§ Load()

virtual void Load ( const sdf::ElementPtr  _sdf)
virtual

Loads the full name of the model and the triggers from the world file.

Parameters
[in]_sdfThe root sdf element for this joint event

Reimplemented from EventSource.

§ Update()

void Update ( )

Called every simulation step.

Member Data Documentation

§ active

bool active
protectedinherited

True if the event source is active.

Inactive event sources do not emit events

§ name

std::string name
protectedinherited

Name of the event.

§ pub

transport::PublisherPtr pub
protectedinherited

a way to send messages to the other topics (to the REST)

§ type

std::string type
protectedinherited

Type of event.

§ world

physics::WorldPtr world
protectedinherited

Pointer to the world.


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