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source: code/trunk/src/core/RootGameState.cc @ 1802

Last change on this file since 1802 was 1802, checked in by rgrieder, 16 years ago

Added almost global try/catch block to at least display the error.

  • Property svn:eol-style set to native
File size: 7.2 KB
Line 
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 *      Reto Grieder
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29#include "RootGameState.h"
30
31#include "util/String.h"
32#include "util/SubString.h"
33#include "util/Debug.h"
34#include "util/Exception.h"
35#include "Core.h"
36#include "Clock.h"
37#include "CommandLine.h"
38
39namespace orxonox
40{
41    SetCommandLineArgument(state, "gui").setShortcut("s");
42
43    RootGameState::RootGameState(const std::string& name)
44        : GameState<GameStateBase>(name)
45        , stateRequest_("")
46    {
47    }
48
49    RootGameState::~RootGameState()
50    {
51    }
52
53    /**
54    @brief
55        Internal method that actually makes the state transition. Since it is internal,
56        the method can assume certain things to be granted (like 'this' is always active).
57    */
58    void RootGameState::makeTransition(GameStateBase* source, GameStateBase* destination)
59    {
60        if (source != 0)
61        {
62            // transition was not initiated by root itself
63            this->activeChild_ = 0;
64        }
65
66        if (destination == this)
67        {
68            // this marks the end of the game.
69            return;
70        }
71
72        // Check for 'destination' in the children map first
73        std::map<GameStateBase*, GameStateBase*>::const_iterator it
74            = this->grandchildrenToChildren_.find(destination);
75        if (it != this->grandchildrenToChildren_.end())
76        {
77            OrxAssert(dynamic_cast<GameStateBase*>(it->second) != 0,
78                "There was a mix with RootGameState and GameState, could not cast.");
79            GameStateBase* child = static_cast<GameStateBase*>(it->second);
80            // child state. Don't use 'state', might be a grandchild!
81            this->activeChild_ = child;
82            child->makeTransition(this, destination);
83        }
84        else
85        {
86            // root doesn't have a parent..
87            OrxAssert(false, "GameState '" + destination->getName() + "' not found in children list of Root.");
88        }
89    }
90
91    void RootGameState::gotoState(const std::string& name)
92    {
93        GameStateBase* request = getState(name);
94        if (request)
95        {
96            GameStateBase* current = getCurrentState();
97            if (current)
98            {
99                current->makeTransition(0, request);
100            }
101            else
102            {
103                // Root is not yet active. This is a violation.
104                ThrowException(GameState, "Activate Root before requesting a state.");
105            }
106        }
107        else
108        {
109            COUT(2) << "Warning: GameState '" << name << "' doesn't exist." << std::endl;
110        }
111    }
112
113    /**
114    @brief
115        Makes a state transition according to the state tree. You can choose any state
116        in the tree to do the call. The function finds the current state on its own.
117    @param state
118        The state to be entered, has to exist in the tree.
119    */
120    void RootGameState::requestState(const std::string& name)
121    {
122        this->stateRequest_ = name;
123    }
124
125    /**
126    @brief
127        Starts the game. The little 'while' denotes the main loop.
128        Whenever the root state is selected, the game ends.
129    @param name
130        State to start with (usually main menu or specified by command line)
131    */
132    void RootGameState::start(int argc, char** argv)
133    {
134        try
135        {
136            // start global orxonox time
137            Clock clock;
138
139            // create the Core settings to configure the output level
140            Core::getInstance();
141
142            parseArguments(argc, argv);
143
144            this->activate();
145
146            // get initial state from command line
147            std::string initialState;
148            CommandLine::getValue<std::string>("state", &initialState);
149            gotoState(initialState);
150
151            while (this->activeChild_)
152            {
153                clock.capture();
154
155                this->tick(clock);
156
157                if (this->stateRequest_ != "")
158                    gotoState(stateRequest_);
159            }
160
161            this->deactivate();
162        }
163        // Note: These are all unhandled exceptions that should not have made its way here!
164        // almost complete game catch block to display the messages appropriately.
165        catch (std::exception& ex)
166        {
167            COUT(1) << ex.what() << std::endl;
168            COUT(1) << "Program aborted." << std::endl;
169            abort();
170        }
171        // anything that doesn't inherit from std::exception
172        catch (...)
173        {
174            COUT(1) << "An unidentifiable exception has occured. Program aborted." << std::endl;
175            abort();
176        }
177    }
178
179    /**
180    @brief
181        Parses both command line and start.ini for CommandLineArguments.
182    */
183    void RootGameState::parseArguments(int argc, char** argv)
184    {
185        // parse command line first
186        std::vector<std::string> args;
187        for (int i = 1; i < argc; ++i)
188            args.push_back(argv[i]);
189
190        try
191        {
192            orxonox::CommandLine::parse(args);
193        }
194        catch (orxonox::ArgumentException& ex)
195        {
196            COUT(1) << ex.what() << std::endl;
197            COUT(0) << "Usage:" << std::endl << "orxonox " << CommandLine::getUsageInformation() << std::endl;
198        }
199
200        // look for additional arguments in start.ini
201        std::ifstream file;
202        file.open("start.ini");
203        args.clear();
204        if (file)
205        {
206            while (!file.eof())
207            {
208                std::string line;
209                std::getline(file, line);
210                line = removeTrailingWhitespaces(line);
211                //if (!(line[0] == '#' || line[0] == '%'))
212                //{
213                SubString tokens(line, " ", " ", false, 92, false, 34, false, 40, 41, false, '#');
214                for (unsigned i = 0; i < tokens.size(); ++i)
215                    if (tokens[i][0] != '#')
216                        args.push_back(tokens[i]);
217                //args.insert(args.end(), tokens.getAllStrings().begin(), tokens.getAllStrings().end());
218                //}
219            }
220            file.close();
221        }
222
223        try
224        {
225            orxonox::CommandLine::parse(args);
226        }
227        catch (orxonox::ArgumentException& ex)
228        {
229            COUT(1) << "An Exception occured while parsing start.ini" << std::endl;
230            COUT(1) << ex.what() << std::endl;
231            COUT(0) << "Usage:" << std::endl << "orxonox " << CommandLine::getUsageInformation() << std::endl;
232        }
233    }
234}
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