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annotate engine/core/model/structures/instance.h @ 0:4a0efb7baf70

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* Datasets becomes the new trunk and retires after that :-)
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 29 Jun 2008 18:44:17 +0000
parents
children 90005975cdbb
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0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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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 modify *
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7 * it under the terms of the GNU General Public License as published by *
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8 * the Free Software Foundation; either version 2 of the License, or *
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9 * (at your option) any later version. *
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10 * *
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11 * This program 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 *
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14 * GNU 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 General Public License *
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17 * along with this program; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_INSTANCE_H
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23 #define FIFE_INSTANCE_H
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24
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25 // Standard C++ library includes
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26 #include <vector>
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27
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28 // 3rd party library includes
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29
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30 // FIFE includes
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31 // These includes are split up in two parts, separated by one empty line
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32 // First block: files included from the FIFE root src directory
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33 // Second block: files included from the same folder
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34 #include "model/metamodel/object.h"
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35 #include "model/metamodel/abstractvisual.h"
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36
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37 #include "location.h"
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38
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39
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40 namespace FIFE {
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41
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42 class Layer;
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43 class Action;
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44 class Instance;
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45 class ActionInfo;
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46 class SayInfo;
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47 class TimeProvider;
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48
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49 class InstanceActionListener {
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50 public:
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51 virtual ~InstanceActionListener() {};
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52 virtual void onInstanceActionFinished(Instance* instance, Action* action) = 0;
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53 };
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54
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55 enum InstanceChangeType {
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56 ICHANGE_NO_CHANGES = 0x0000,
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57 ICHANGE_LOC = 0x0001,
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58 ICHANGE_FACING_LOC = 0x0002,
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59 ICHANGE_SPEED = 0x0004,
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60 ICHANGE_ACTION = 0x0008,
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61 ICHANGE_TIME_MULTIPLIER = 0x0010,
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62 ICHANGE_SAYTEXT = 0x0020,
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63 ICHANGE_ROTATION = 0x0040, // NOTE! does not currently get updated onInstanceChange unless some other activity is performed
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64 };
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65 typedef unsigned int InstanceChangeInfo;
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66
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67 class InstanceChangeListener {
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68 public:
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69 virtual ~InstanceChangeListener() {};
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70 virtual void onInstanceChanged(Instance* instance, InstanceChangeInfo info) = 0;
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71 };
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72
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73 /**
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74 * An Instance is an "instantiation" of an Object at a Location.
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75 */
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76 class Instance : public ResourceClass {
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77 public:
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78
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79 /** Constructor
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80 * Instances are created by calling addInstance from layer, thus
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81 * this method should really be called only by layer or test code
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82 */
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83 Instance(Object* object, const Location& location, const std::string& identifier="");
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84
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85 /** Destructor
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86 */
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87 virtual ~Instance();
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88
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89 /** Get the identifier for this instance; possibly null.
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90 */
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91 const std::string& getId() { return m_id; }
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92
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93 /** Gets object where this instance is instantiated from
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94 */
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95 Object* getObject() { return m_object; }
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96
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97 /** Sets location of the instance
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98 * @param loc new location
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99 */
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100 void setLocation(const Location& loc);
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101
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102 /** Gets current location of instance
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103 * @note does not return const Location&, since swig wont be const correct
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104 * @return current location
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105 */
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106 Location getLocation() const { return m_location; }
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107
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108 /** Gets reference of current location of instance
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109 * @return reference to current location
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110 */
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111 Location& getLocationRef() { return m_location; }
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112
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113 /** Gets movement target in case instance is moving. In case not, returns current location
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114 * To move target location, call move-method
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115 * @see move
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116 * @note does not return const Location&, since swig wont be const correct
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117 * @return Movement target location
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118 */
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119 Location getTargetLocation() const;
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120
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121 /** Sets the direction where instance is heading. Useful e.g. with static
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122 * instances which don't "move" or "act"
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123 */
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124 void setFacingLocation(const Location& loc);
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125
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126 /** Returns the direction where instance is heading
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127 * @note does not return const Location&, since swig wont be const correct
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128 * @return the direction of instance.
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129 */
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130 Location getFacingLocation();
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131
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132 /** Set the rotation offset of this instance
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133 */
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134 void setRotation(int rotation);
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135
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136 /** Get the rotation offset of this instance
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137 */
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138 int getRotation() const { return m_rotation; }
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139
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140 /** Returns reference to the direction where instance is heading
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141 * Note: if instance didn't previously hadn't defined facing location
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142 * (e.g. by movement or setFacingLocation), method creates the location
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143 * thus increasing memory consumption.
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144 * @return reference to the direction of instance.
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145 */
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146 Location& getFacingLocationRef();
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147
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148 /** Adds new instance action listener
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149 * @param listener to add
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150 */
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151 void addActionListener(InstanceActionListener* listener);
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152
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153 /** Removes associated instance action listener
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154 * @param listener to remove
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155 */
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156 void removeActionListener(InstanceActionListener* listener);
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157
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158 /** Adds new instance change listener
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159 * @param listener to add
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160 */
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161 void addChangeListener(InstanceChangeListener* listener);
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162
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163 /** Removes associated instance change listener
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164 * @param listener to remove
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165 */
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166 void removeChangeListener(InstanceChangeListener* listener);
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167
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168 /** Gets the currently active action. This is owned by
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169 * the instance's object, so don't delete it!
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170 * @return current action, NULL in case there is none
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171 */
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172 Action* getCurrentAction() const;
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173
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174 /** Gets the speed in case instance is moving
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175 * otherwise returns 0
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176 * @return instance speed. Value 1 means distance 1 in layer coordinates / second
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177 */
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178 double getMovementSpeed() const;
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179
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180 /** Gets the time in milliseconds how long action has been active
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181 * In case there is no current action, returns -1
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182 * @return action runtime
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183 */
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184 int getActionRuntime() const;
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185
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186 /** Performs given named action to the instance. While performing the action
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187 * moves instance to given target with given speed
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188 * @param action_name name of the action
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189 * @param target place where to move this instance
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190 * @param speed speed used for movement. Units = distance 1 in layer coordinates per second
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191 */
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192 void move(const std::string& action_name, const Location& target, const double speed);
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193
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194 /** Performs given named action to the instance. Performs no movement
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195 * @param action_name name of the action
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196 * @param direction coordinates for cell towards instance is heading to when performing the action
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197 * @param repeating in case true, keeps repeating this action
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198 */
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199 void act(const std::string& action_name, const Location& direction, bool repeating=false);
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200
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201 /** Causes instance to "say" given text (shown on screen next to the instance)
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202 * @param text text to say. If "" given, clear the text
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203 * @param duration duration to show the text (in ms). If 0, shows forever
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204 */
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205 void say(const std::string& text, unsigned int duration=0);
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206
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207 /** Performs given named action to the instance. While performing the action
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208 * follows given isntance with given speed
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209 * @param action_name name of the action
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210 * @param leader followed instance
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211 * @param speed speed used for movement. Units = distance 1 in layer coordinates per second
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212 */
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213 void follow(const std::string& action_name, Instance* leader, const double speed);
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214
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215 /** Returns pointer to currently set saytext. In case no text is set, returns NULL
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216 */
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217 const std::string* getSayText() const;
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218
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219 /** Updates the instance related to the current action
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220 * @param curticks current tick count of the system
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221 * @note call this only once in engine update cycle, so that tracking between
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222 * current position and previous position keeps in sync.
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223 * @returns marked changes
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224 */
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225 InstanceChangeInfo update(unsigned int curticks=0);
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226
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227 /** Sets visualization to be used. Transfers ownership.
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228 */
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229 void setVisual(AbstractVisual* visual) { m_visual = visual; }
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230
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231 /** Gets used visualization
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232 */
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233 template<typename T> T* getVisual() const { return reinterpret_cast<T*>(m_visual); }
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234
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235 /** Sets speed for the map. See Model::setTimeMultiplier.
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236 */
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237 void setTimeMultiplier(float multip);
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238
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239 /** Gets instance speed. @see setTimeMultiplier.
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240 */
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241 float getTimeMultiplier();
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242
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243 /** Gets instance speed, considering also model and map speeds. @see setTimeMultiplier.
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244 */
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245 float getTotalTimeMultiplier();
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246
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247 /** Refreshes instance e.g. in case location is updated directly (not via setLocation)
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248 * In this case e.g. instance's master time provider is changed, so it needs to be updated
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249 */
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250 void refresh();
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251
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252 /** Returns a bitmask of changes since previous update
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253 */
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254 inline InstanceChangeInfo getChangeInfo();
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255
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256 private:
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257 std::string m_id;
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258
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259 // The rotation offset of this instance. This is in addition to possible camera rotation and
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260 // intended for setting, for example, a rotation of a tile.
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261 int m_rotation;
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262
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263 /** InstanceActivity gets allocated in case there is some runtime
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264 * activity related to the instance. Keeping activity related variables
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265 * in separate class keeps memory consumption lower e.g. for large tile
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266 * areas.
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267 * Class also keeps track of changes since the previous update call.
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268 * With this bookkeeping, it is possible to optimize several spots in
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269 * the engine, basically only reacting to changes instead of polling.
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270 */
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271 class InstanceActivity {
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272 public:
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273 InstanceActivity(Instance& source);
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274 ~InstanceActivity();
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275
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276 // ----- Fields related to change tracking -----
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277 // updates cached variables, marks changes
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278 void update(Instance& source);
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279 // location on previous round
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280 Location m_location;
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281 // facing location on previous round
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282 Location m_facinglocation;
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283 // action on previous round. @NOTE: might become invalid, only used for address comparison
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284 Action* m_action;
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285 // speed on previous round
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286 double m_speed;
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287 // time multiplier on previous round
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288 float m_timemultiplier;
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289 // say text on previous round
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290 std::string m_saytxt;
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291 // listeners for changes
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292 std::vector<InstanceChangeListener*> m_changelisteners;
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293
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294 // ----- Fields related to generic activity -----
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295 // listeners for action related events
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296 std::vector<InstanceActionListener*> m_actionlisteners;
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297 // action information, allocated when actions are bind
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298 ActionInfo* m_actioninfo;
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299 // text to say + duration, allocated when something is said
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300 SayInfo* m_sayinfo;
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301 // time scaler for this instance
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302 TimeProvider* m_timeprovider;
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303 };
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304 InstanceActivity* m_activity;
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305 // bitmask stating current changes
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306 InstanceChangeInfo m_changeinfo;
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307
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308 // object where instantiated from
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309 Object* m_object;
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310 // current location
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311 Location m_location;
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312 // current facing location. Just a pointer to save space e.g. on tiles
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313 Location* m_facinglocation;
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314 // instance visualization
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315 AbstractVisual* m_visual;
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316
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317 Instance(const Instance&);
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318 Instance& operator=(const Instance&);
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319 // Finalize current action
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320 void finalizeAction();
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321 // Initialize action for use
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322 void initalizeAction(const std::string& action_name);
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323 // Moves instance. Returns true if finished
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324 bool process_movement();
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325 // Calculates movement based current location and speed
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326 void calcMovement();
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327 // rebinds time provider based on new location
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328 void bindTimeProvider();
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329 // called when instance has been changed. Causes instance to create InstanceActivity
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330 void initializeChanges();
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331 };
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332
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333 inline InstanceChangeInfo Instance::getChangeInfo() {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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334 if (m_activity) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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335 return m_changeinfo;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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336 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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337 return ICHANGE_NO_CHANGES;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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338 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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339 } // FIFE
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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340
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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341 #endif