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/*
*
* SIXENSE CONFIDENTIAL
*
* Copyright (C) 2011 Sixense Entertainment Inc.
* All Rights Reserved
*
*/
#ifndef EVENT_TRIGGERS_HPP
#define EVENT_TRIGGERS_HPP
#pragma warning(push)
#pragma warning( disable:4251 )
#include <sixense_math.hpp>
namespace sixenseUtils {
// Classes for triggering events based on joystick or trigger positions
// These are classes that call the supplied EventTriggerBase's 'trigger()' events when triggered. They can be
// created and bound to a switch.
class EventTriggerBase {
public:
virtual void trigger() const = 0;
};
// Do nothing
class NullEventTrigger : public EventTriggerBase {
public:
virtual void trigger() const {};
};
// These classes monitor a floating point value, and trigger their events when the value crosses
// a threshold, both rising and falling.
class EventSwitchBase {
public:
EventSwitchBase( float thresh, const EventTriggerBase *positive_transition_event, const EventTriggerBase *negative_transition_event ) : _last_state(false), _thresh(thresh), _positive_transition_event(positive_transition_event), _negative_transition_event(negative_transition_event) {}
~EventSwitchBase() {
delete _positive_transition_event;
delete _negative_transition_event;
}
void test( float val ) {
if( val > _thresh && !_last_state ) {
if( _positive_transition_event ) {
_positive_transition_event->trigger();
}
_last_state = true;
}
if( val < _thresh && _last_state ) {
if( _negative_transition_event ) {
_negative_transition_event->trigger();
}
_last_state = false;
}
}
bool getLastState( void ) {
return _last_state;
}
protected:
bool _last_state;
float _thresh;
const EventTriggerBase *_positive_transition_event;
const EventTriggerBase *_negative_transition_event;
private:
EventSwitchBase() {}
};
class PlaneCrossEventSwitch : public EventSwitchBase {
public:
PlaneCrossEventSwitch( sixenseMath::Plane plane, float thresh, const EventTriggerBase *positive_transition_event, const EventTriggerBase *negative_transition_event ) : EventSwitchBase( thresh, positive_transition_event, negative_transition_event ),
_plane(plane) {}
void test( sixenseMath::Vector3 pt ) {
EventSwitchBase::test( -1.0f * (float)_plane.whichSide( pt ) );
}
private:
sixenseMath::Plane _plane;
};
class BinaryEventSwitch : public EventSwitchBase {
public:
BinaryEventSwitch( const EventTriggerBase *positive_transition_event, const EventTriggerBase *negative_transition_event ) : EventSwitchBase( 0.5f, positive_transition_event, negative_transition_event ) {}
void test( bool val ) {
EventSwitchBase::test( val ? 1.0f : 0.0f );
}
};
class ValuatorEventSwitch : public EventSwitchBase {
public:
ValuatorEventSwitch( float thresh, const EventTriggerBase *positive_transition_event, const EventTriggerBase *negative_transition_event ) : EventSwitchBase( thresh, positive_transition_event, negative_transition_event ){}
void test( float val ) {
EventSwitchBase::test( val );
}
};
}
#pragma warning(pop)
#endif
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