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annotate engine/core/model/structures/layer.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 ab41334e8a57
children 16c2b3ee59ce
rev   line source
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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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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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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
0
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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 map 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() const { return m_id; }
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107
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108 /** Sets the identifier for this layer.
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109 */
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110 void setId(const std::string& id) { m_id = id; }
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111
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112 /** Get the map this layer is contained in
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113 */
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114 Map* getMap() const { return m_map; }
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115
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116 /** Get the Cellgrid
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117 * @return a valid cellgrid
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118 */
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119 CellGrid* getCellGrid() const { return m_grid; }
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120
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121 /** Set the Cellgrid
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122 */
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123 void setCellGrid(CellGrid* grid) { m_grid = grid; }
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124
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125 /** Get the instance tree.
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126 * @return this layers instance tree.
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127 */
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128 InstanceTree* getInstanceTree(void) const { return m_instanceTree; }
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129
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130 /** Check existance of objects on this layer
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131 * @return True, if objects exist.
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132 */
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133 bool hasInstances() const;
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134
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135 /** Add an instance of an object at a specific position
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136 */
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137 Instance* createInstance(Object* object, const ModelCoordinate& p, const std::string& id="");
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138
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139 /** Add an instance of an object at a specific position
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140 */
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141 Instance* createInstance(Object* object, const ExactModelCoordinate& p, const std::string& id="");
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142
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143 /** Add a valid instance at a specific position. This is temporary. It will be moved to a higher level
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144 later so that we can ensure that each Instance only lives in one layer.
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145 */
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146 bool addInstance(Instance* instance, const ExactModelCoordinate& p);
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147
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148 /** Remove an instance from the layer
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149 */
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150 void deleteInstance(Instance* object);
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151
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152 /** Get the list of instances on this layer
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153 */
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154 const std::vector<Instance*>& getInstances() const { return m_instances; }
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155
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156 /** Get the list of instances on this layer with the given identifier.
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157 */
99
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158 std::vector<Instance*> getInstances(const std::string& id);
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159
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160 /** Returns instances that match given location.
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161 * @param loc location where to fetch instances from
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162 * @param use_exactcoordinates if true, comparison is done using exact coordinates. if not, cell coordinates are used
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163 */
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164 std::vector<Instance*> getInstancesAt(Location& loc, bool use_exactcoordinates=false);
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165
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166 /** Get the first instance on this layer with the given identifier.
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167 */
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168 Instance* getInstance(const std::string& identifier);
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169
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170 /** Set object visibility
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171 */
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172 void setInstancesVisible(bool vis);
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173
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174 /** Sets the transparency of all instances on the layer. 0=opaque, 255=transparent
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175 * @parm transparency Transparency value from 0-255.
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176 */
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177 void setLayerTransparency(uint8_t transparency);
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178
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179 /** Returns the layer's transparency value
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180 */
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181 uint8_t getLayerTransparency();
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182
0
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183 /** Retrieves the minimum/maximum coordinates of instances on the layer.
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184 * @param min A reference to a ModelCoordinate that will hold the minimum coordinate.
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185 * @param max A reference to a ModelCoordinate that will hold the maximum coordinate.
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186 * @param layer A pointer to another layer that can be used to cast coordinates bettween layers.
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187 */
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188 void getMinMaxCoordinates(ModelCoordinate& min, ModelCoordinate& max, const Layer* layer = 0) const;
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189
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190 /** Determines if a given cell on the layer contains a blocking instance
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191 *
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192 * @param cellCoordinate A const reference to a model coordinate of the cell in question.
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193 * @return A boolean, true if it is blocked false otherwise.
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194 */
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195 bool cellContainsBlockingInstance(const ModelCoordinate& cellCoordinate);
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196
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197 /** Toggle object visibility
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198 * @see setObjectsVisible
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199 */
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200 void toggleInstancesVisible();
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201
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202 /** Check object visibility
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203 * @see setObjectsVisible
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204 */
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205 bool areInstancesVisible() const { return m_instances_visibility; }
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206
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207 /** Called periodically to update events on layer
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208 * @returns true if layer was changed since the last update, false otherwise
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209 */
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210 bool update();
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211
0
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212 /** Sets pathing strategy for the layer
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213 * @see PathingStrategy
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214 */
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215 void setPathingStrategy(PathingStrategy strategy) { m_pathingstrategy = strategy; }
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216
0
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217 /** Gets pathing strategy for the layer
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218 * @see PathingStrategy
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219 */
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220 PathingStrategy getPathingStrategy() const { return m_pathingstrategy; }
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221
0
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222 /** Adds new change listener
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223 * @param listener to add
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224 */
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225 void addChangeListener(LayerChangeListener* listener);
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226
0
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227 /** Removes associated change listener
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228 * @param listener to remove
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229 */
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230 void removeChangeListener(LayerChangeListener* listener);
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231
0
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232 /** Returns true, if layer information was changed during previous update round
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233 */
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234 bool isChanged() { return m_changed; }
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235
0
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236 /** Returns instances that were changed during previous update round.
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237 * @note does not contain created or deleted instances
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238 */
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239 std::vector<Instance*>& getChangedInstances() { return m_changedinstances; }
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240
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241 protected:
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242 std::string m_id;
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243
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244 Map* m_map;
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245
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246 bool m_instances_visibility;
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247
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248 uint8_t m_transparency;
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249
0
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250 // all the instances on this layer
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251 std::vector<Instance*> m_instances;
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252
0
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253 //The instance tree
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254 InstanceTree* m_instanceTree;
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255
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256 // layer's cellgrid
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257 CellGrid* m_grid;
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258
0
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259 // pathing strategy for the layer
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260 PathingStrategy m_pathingstrategy;
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261
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262 // listeners for layer changes
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263 std::vector<LayerChangeListener*> m_changelisteners;
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264
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265 // holds changed instances after each update
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266 std::vector<Instance*> m_changedinstances;
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267
0
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268 // true if layer (or it's instance) information was changed during previous update round
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269 bool m_changed;
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270 };
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271
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272 } // FIFE
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273
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274 #endif