SoSensor Class Referenceabstract
Sensor Classes

The SoSensor class is the abstract base class for all sensors. More...

`#include <Inventor/sensors/SoSensor.h>`

Inheritance diagram for SoSensor:

## Public Member Functions

| SoSensor (void)
| SoSensor (SoSensorCB *func, void *data)
virtual | ~SoSensor (void)
void | setFunction (SoSensorCB *callbackfunction)
SoSensorCBPtr | getFunction (void) const
void | setData (void *callbackdata)
void * | getData (void) const
virtual void | schedule (void)=0
virtual void | unschedule (void)=0
virtual SbBool | isScheduled (void) const =0
virtual void | trigger (void)
virtual SbBool | isBefore (const SoSensor *s) const =0
void | setNextInQueue (SoSensor *next)
SoSensor * | getNextInQueue (void) const

## Static Public Member Functions

static void | initClass (void)

## Protected Attributes

SoSensorCB * | func
void * | funcData

## Detailed Description

The SoSensor class is the abstract base class for all sensors.

Sensors is a mechanism in Coin for scheduling jobs to be run upon specific events. The events in question could be particular points in time, or changes to entities in the scene graph.

See documentation of subclasses for insight into exactly for what types of events we can trigger sensor callbacks.

For most tasks where application programmers can use sensors, it is also possible to achieve the same results by using engines. There are a few important differences between sensors and engines, though:

Engines are considered part of the scene graph, and are written to file upon SoWriteAction export operations. Sensors, on the other hand, are not included in export operations.

Engines basically connects fields (and come with a lot of built-in functionality for combining and converting inputs and outputs), you just decide which engine you want, connect inputs and output and forget about it. Sensors are a lot more flexible in what you can do when they trigger, as control is transferred internally from Coin to your registered callback functions.

See also
  SoSensorManager, SoEngine

## Constructor & Destructor Documentation

## SoSensor() [1/2]

SoSensor::SoSensor | ( | void |  | ) |

Constructor.

## SoSensor() [2/2]

SoSensor::SoSensor | ( | SoSensorCB * | funcptr,
|  | void * | data )

Constructor taking as parameters the sensor callback function func and the user data pointer which will be passed to the callback.

See also
  setFunction(), setData()

## ~SoSensor()

SoSensor::~SoSensor | ( | void |  | ) |

virtual

Destructor.

## Member Function Documentation

## setFunction()

void SoSensor::setFunction | ( | SoSensorCB * | callbackfunction | ) |

Set the callback function pointer which will be used when the sensor is triggered.

See also
  getFunction(), setData()

## getFunction()

SoSensorCB * SoSensor::getFunction | ( | void |  | ) | const

Returns the callback function pointer.

See also
  setFunction()

## setData()

void SoSensor::setData | ( | void * | callbackdata | ) |

Set the user supplied data pointer which will be used as the first argument to the sensor callback function.

See also
  getData(), setFunction()

## getData()

void * SoSensor::getData | ( | void |  | ) | const

Returns the user supplied callback function data pointer.

See also
  setData()

## schedule()

virtual void SoSensor::schedule | ( | void |  | ) |

pure virtual

Put the sensor in a queue to be triggered at a later time.

See also
  unschedule(), isScheduled()

Implemented in SoAlarmSensor, SoDelayQueueSensor, SoTimerQueueSensor, and SoTimerSensor.

## unschedule()

virtual void SoSensor::unschedule | ( | void |  | ) |

pure virtual

Remove sensor from queue. The sensor will not be triggered unless it is later rescheduled.

See also
  schedule(), isScheduled()

Implemented in SoDelayQueueSensor, SoTimerQueueSensor, and SoTimerSensor.

## isScheduled()

virtual SbBool SoSensor::isScheduled | ( | void |  | ) | const

pure virtual

Check if this sensor is scheduled for triggering.

See also
  schedule(), unschedule()

Implemented in SoDelayQueueSensor, and SoTimerQueueSensor.

## trigger()

void SoSensor::trigger | ( | void |  | ) |

virtual

Trigger the sensor's callback function.

Reimplemented in SoDataSensor, SoDelayQueueSensor, SoFieldSensor, and SoTimerQueueSensor.

## isBefore()

virtual SbBool SoSensor::isBefore | ( | const SoSensor * | s | ) | const

pure virtual

Returns `TRUE` if this sensor should precede sensor s in its sensor queue.

## setNextInQueue()

void SoSensor::setNextInQueue | ( | SoSensor * | next | ) |

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
Open Inventor function not implemented in Coin.

## getNextInQueue()

SoSensor * SoSensor::getNextInQueue | ( | void |  | ) | const

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
Open Inventor function not implemented in Coin.

## initClass()

void SoSensor::initClass | ( | void |  | ) |

static

Sets up initialization for static data for the sensors. Called by SoDB::init().

## Member Data Documentation

## func

SoSensorCB* SoSensor::func

protected

Function to be called when a sensor triggers.

## funcData

void* SoSensor::funcData

protected

Data passed to the callback function.

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

- SoSensor.h
- SoSensor.cpp