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annotate engine/core/model/metamodel/timeprovider.h @ 405:cfe2f6db4964

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Reverting my last change to camera.cpp. It caused unexpected results with rotated tiles.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 29 Jan 2010 15:55:47 +0000
parents 5816ab527da8
children
rev   line source
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4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_TIME_PROVIDER_H
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23 #define FIFE_TIME_PROVIDER_H
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24
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25 // Standard C++ library includes
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27 // 3rd party library includes
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29 // FIFE includes
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30 // These includes are split up in two parts, separated by one empty line
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31 // First block: files included from the FIFE root src directory
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32 // Second block: files included from the same folder
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33 #include "util/base/exception.h"
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34
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35 namespace FIFE {
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36
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37 /** Timeprovider is an utility providing time management functionality
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38 * You can have hierarchy of time providers, whose multiplier can be changed independently.
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39 * Changing providers upper in the hierarchy, changes also all subproviders with the same ratio
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40 */
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41 class TimeProvider {
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42 public:
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43 /** Constructor
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44 * In case there there is no provider master, you can use NULL
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45 */
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46 explicit TimeProvider(TimeProvider* master);
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47 ~TimeProvider();
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49 /** With multiplier, you can adjust the time speed. 0.5 means time runs half as slow,
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50 * while 2.0 means it runs twice as fast
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51 */
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52 void setMultiplier(float multiplier);
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53
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54 /** @see setMultiplier. Returns mutliplier for this single provider
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55 */
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56 float getMultiplier() const;
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57
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58 /** @see setMultiplier. Returns mutliplier for whole chain of timeproviders
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59 * E.g. if master has multiplier 2.0 and this has 0.5, end result = 1.0
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60 */
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61 float getTotalMultiplier() const;
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62
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63 /** Returns current game ticks, already scaled.
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64 */
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65 unsigned int getGameTime() const;
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66
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67 private:
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68 TimeProvider* m_master;
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69 float m_multiplier;
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70 double m_time_static, m_time_scaled;
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71
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72 /** Returns current game ticks, already scaled, more precise.
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73 */
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74 double getPreciseGameTime() const;
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75 };
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76
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77 /** Utility function to calculate time scaling. Mostly done to avoid littering other code
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78 * with related casting
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79 * @return multiplier * ticks
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80 */
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81 unsigned int scaleTime(float multiplier, unsigned int ticks);
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82
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83 } //FIFE
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84 #endif
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