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source: code/trunk/src/libraries/core/Event.cc @ 6858

Last change on this file since 6858 was 6800, checked in by dafrick, 15 years ago

Created a new class of triggers called Multitriggers.
MultiTriggers are triggers which (as opposed to normal triggers) have a state for each object triggering the MultiTrigger, that means, that a MultiTrigger can be triggered for two different Players, while not being triggered for a third.
To go with this MultiTrigger I created a data structure (MultitriggerContainer), which helps relaying important information to the objects, that receive the Events of the trigger.
Also there is a MultiDistanceTrigger, which is just the DistanceTrigger as a MultiTrigger.

To make this work I had to make some adjustements to the eventsystem, namely an EventState can now be either an EventState (as it was before) or an EventSink, which means that every efent arriving at the EventState is processed as opposed to just the ones which change the state.
There is a new makro (XMLPortEventSink) to create an EventState with sink behaviour. It can be used exacly as the XMLPortEventState makro.

  • Property svn:eol-style set to native
File size: 4.6 KB
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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Fabian 'x3n' Landau
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29#include "Event.h"
30
31#include "BaseObject.h"
32#include "Identifier.h"
33
34namespace orxonox
35{
36    /**
37        @brief Destructor: Deletes the functor of the event state.
38    */
39    EventState::~EventState()
40    {
41        if (this->statefunction_)
42            delete this->statefunction_;
43    }
44
45    /**
46        @brief Processes an event (calls the set-function if the necessary conditions are met).
47
48        @param event     The fired event
49        @param object    The object whose state is affected by the event (only needed for debug output)
50    */
51    void EventState::process(const Event& event, BaseObject* object)
52    {
53        if (this->bProcessingEvent_)
54        {
55            COUT(2) << "Warning: Detected Event loop in section \"" << event.statename_ << "\" of object \"" << object->getName() << "\" and fired by \"" << event.originator_->getName() << '"' << std::endl;
56            return;
57        }
58
59        this->bProcessingEvent_ = true;
60
61        COUT(4) << "Processing event (EventState) : originator: " << event.originator_->getIdentifier()->getName() << " (&" << event.originator_ << "), activate: " << event.activate_ << ", name: " << event.name_ << ", statename: " << event.statename_ << ", object: " << object->getIdentifier()->getName() << " (&" << object << ")" << ", subclass: " << this->subclass_->getName() << ", (?): " << event.originator_->isA(this->subclass_) << "." << std::endl;
62       
63        // check if the originator is an instance of the requested class
64        if (event.originator_->isA(this->subclass_))
65        {
66            // If the EventState doesn't act as an EventSink.
67            // actualize the activationcounter
68            if(!this->bSink_)
69            {
70                if (event.activate_)
71                    ++this->activeEvents_;
72                else
73                {
74                    --this->activeEvents_;
75
76                    if (this->activeEvents_ < 0)
77                        this->activeEvents_ = 0;
78                }
79            }
80
81            if (this->statefunction_->getParamCount() == 0 && event.activate_)
82            {
83                // if the eventfunction doesn't have a state, just call it whenever an activation-event comes in
84                (*this->statefunction_)();
85            }
86            else if (this->bSink_ || (!this->bSink_ && ((this->activeEvents_ == 1 && event.activate_) || (this->activeEvents_ == 0 && !event.activate_)) ) )
87            {
88                // if the eventfunction needs a state, we just call the function if the state changed from 0 to 1 (state = true) or from 1 to 0 (state = false) [but not if activeEvents_ is > 1]
89                if (this->statefunction_->getParamCount() == 1)
90                {
91                    // one argument: just the eventstate
92                    (*this->statefunction_)(event.activate_);
93                }
94                else if (this->statefunction_->getParamCount() >= 2)
95                {
96                    // two arguments: the eventstate and the originator
97                    if (this->subclass_->isExactlyA(ClassIdentifier<BaseObject>::getIdentifier()))
98                    {
99                        // if the subclass is BaseObject, we don't have to cast the pointer
100                        (*this->statefunction_)(event.activate_, event.originator_);
101                    }
102                    else
103                    {
104                        // else cast the pointer to the desired class
105                        void* castedOriginator = event.originator_->getDerivedPointer(this->subclass_->getClassID());
106                        (*this->statefunction_)(event.activate_, castedOriginator);
107                    }
108                }
109            }
110        }
111
112        this->bProcessingEvent_ = false;
113    }
114}
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