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annotate engine/core/model/structures/layer.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 112fc4af772d
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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_LAYER_H
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23 #define FIFE_LAYER_H
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24
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25 // Standard C++ library includes
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26 #include <algorithm>
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27 #include <string>
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28 #include <vector>
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29
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30 // 3rd party library includes
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31
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32 // FIFE includes
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33 // These includes are split up in two parts, separated by one empty line
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34 // First block: files included from the FIFE root src directory
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35 // Second block: files included from the same folder
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36 #include "util/base/resourceclass.h"
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37 #include "model/metamodel/modelcoords.h"
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38 #include "model/metamodel/object.h"
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39
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40 #include "instance.h"
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41
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42 namespace FIFE {
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43
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44 class Map;
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45 class Selection;
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46 class CellGrid;
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47 class Object;
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48 class InstanceTree;
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49
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50 /** Defines how pathing can be performed on this layer
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51 *
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52 * CELL_EDGES_ONLY allows pather to use only cell edges when moving instances from cell to cell on map
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53 * CELL_EDGES_AND_DIAGONALS allows pather to use both cell edges and diagonals when moving instances from cell to cell on map
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54 * FREEFORM allows pather to find shortest route regardless of cellgrid used on the layer
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55 */
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56 enum PathingStrategy {
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57 CELL_EDGES_ONLY,
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58 CELL_EDGES_AND_DIAGONALS,
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59 FREEFORM
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60 };
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61
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62 /** Listener interface for changes happening on a layer
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63 */
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64 class LayerChangeListener {
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65 public:
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66 virtual ~LayerChangeListener() {};
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67
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68 /** Called when some instance is changed on layer. @see InstanceChangeType
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69 * @param layer where change occurred
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70 * @param changedInstances list of instances containing some changes
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71 * @note Does not report creations and deletions
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72 */
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73 virtual void onLayerChanged(Layer* layer, std::vector<Instance*>& changedInstances) = 0;
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74
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75 /** Called when some instance gets created on layer
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76 * @param layer where change occurred
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77 * @param instance which got created
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78 */
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79 virtual void onInstanceCreate(Layer* layer, Instance* instance) = 0;
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80
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81 /** Called when some instance gets deleted on layer
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82 * @param layer where change occurred
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83 * @param instance which will be deleted
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84 * @note right after this call, instance actually gets deleted!
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85 */
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86 virtual void onInstanceDelete(Layer* layer, Instance* instance) = 0;
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87 };
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88
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89
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90 /** A basic layer on a map
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91 */
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92 class Layer : public ResourceClass {
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93 public:
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94 /** Constructor
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95 * Layers are created by calling addLayer from map, thus
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96 * this method should really be called only by elevation or test code
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97 */
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98 Layer(const std::string& identifier, Map* map, CellGrid* grid);
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99
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100 /** Destructs a Layer instance
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101 */
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102 ~Layer();
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103
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104 /** Get the id of this layer.
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105 */
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106 const std::string& getId() { return m_id; }
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107
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108 /** Get the map this layer is contained in
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109 */
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110 Map* getMap() const { return m_map; }
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111
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112 /** Get the Cellgrid as set in the constructor
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113 * @return a valid cellgrid
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114 */
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115 CellGrid* getCellGrid() const { return m_grid; }
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116
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117 /** Get the instance tree.
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118 * @return this layers instance tree.
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119 */
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120 InstanceTree* getInstanceTree(void) const { return m_instanceTree; }
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121
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122 /** Check existance of objects on this layer
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123 * @return True, if objects exist.
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124 */
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125 bool hasInstances() const;
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126
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127 /** Add an instance of an object at a specific position
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128 */
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129 Instance* createInstance(Object* object, const ModelCoordinate& p, const std::string& id="");
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130
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131 /** Add an instance of an object at a specific position
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132 */
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133 Instance* createInstance(Object* object, const ExactModelCoordinate& p, const std::string& id="");
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134
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135 /** Remove an instance from the layer
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136 */
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137 void deleteInstance(Instance* object);
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138
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139 /** Get the list of instances on this layer
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140 */
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141 const std::vector<Instance*>& getInstances() const { return m_instances; }
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142
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143 /** Get the instance on this layer with the given identifier.
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144 */
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145 Instance* getInstance(const std::string& id);
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146
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147 /** Set object visibility
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148 */
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149 void setInstancesVisible(bool vis);
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150
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151 /** Retrieves the minimum/maximum coordinates of instances on the layer.
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152 * @param min A reference to a ModelCoordinate that will hold the minimum coordinate.
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153 * @param max A reference to a ModelCoordinate that will hold the maximum coordinate.
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154 * @param layer A pointer to another layer that can be used to cast coordinates bettween layers.
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155 */
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156 void getMinMaxCoordinates(ModelCoordinate& min, ModelCoordinate& max, const Layer* layer = 0) const;
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157
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158 /** Determines if a given cell on the layer contains a blocking instance
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159 *
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160 * @param cellCoordinate A const reference to a model coordinate of the cell in question.
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161 * @return A boolean, true if it is blocked false otherwise.
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162 */
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163 bool cellContainsBlockingInstance(const ModelCoordinate& cellCoordinate);
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164
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165 /** Toggle object visibility
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166 * @see setObjectsVisible
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167 */
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168 void toggleInstancesVisible();
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169
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170 /** Check object visibility
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171 * @see setObjectsVisible
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172 */
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173 bool areInstancesVisible() const { return m_instances_visibility; }
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174
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175 /** Called periodically to update events on layer
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176 * @returns true if layer was changed since the last update, false otherwise
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177 */
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178 bool update();
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179
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180 /** Sets pathing strategy for the layer
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181 * @see PathingStrategy
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182 */
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183 void setPathingStrategy(PathingStrategy strategy) { m_pathingstrategy = strategy; }
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184
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185 /** Gets pathing strategy for the layer
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186 * @see PathingStrategy
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187 */
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188 PathingStrategy getPathingStrategy() const { return m_pathingstrategy; }
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189
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190 /** Adds new change listener
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191 * @param listener to add
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192 */
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193 void addChangeListener(LayerChangeListener* listener);
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194
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195 /** Removes associated change listener
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196 * @param listener to remove
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197 */
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198 void removeChangeListener(LayerChangeListener* listener);
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199
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200 /** Returns true, if layer information was changed during previous update round
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201 */
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202 bool isChanged() { return m_changed; }
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203
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204 /** Returns instances that were changed during previous update round.
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205 * @note does not contain created or deleted instances
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206 */
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207 std::vector<Instance*>& getChangedInstances() { return m_changedinstances; }
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208
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209 protected:
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210 std::string m_id;
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211
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212 Map* m_map;
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213
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214 bool m_instances_visibility;
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215
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216 // all the instances on this layer
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217 std::vector<Instance*> m_instances;
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218
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219 //The instance tree
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220 InstanceTree* m_instanceTree;
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221
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222 // layer's cellgrid
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223 CellGrid* m_grid;
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224
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225 // pathing strategy for the layer
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226 PathingStrategy m_pathingstrategy;
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227
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228 // listeners for layer changes
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229 std::vector<LayerChangeListener*> m_changelisteners;
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230
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231 // holds changed instances after each update
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232 std::vector<Instance*> m_changedinstances;
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233
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234 // true if layer (or it's instance) information was changed during previous update round
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235 bool m_changed;
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236 };
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237
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238 } // FIFE
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239
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240 #endif