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annotate engine/core/util/structures/quadtree.h @ 104:2c7101e4d81d

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* Removing old testmaps as they're not needed for the 2008.2 release
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Thu, 24 Jul 2008 10:18:44 +0000
parents 90005975cdbb
children
rev   line source
0
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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 * *
46
90005975cdbb * Final LGPL switch step by adjusting the file headers
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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. *
0
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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 *
0
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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_UTIL_QUADTREE_H
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23 #define FIFE_UTIL_QUADTREE_H
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24
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25 // Standard C++ library includes
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26 #include <cassert>
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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 "rect.h"
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35
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36 namespace FIFE {
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37
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38 /** QuadTree Node
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39 */
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40 template<typename DataType, int MinimumSize = 128>
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41 class QuadNode {
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42 protected:
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43 QuadNode *m_parent;
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44 QuadNode *m_nodes[4];
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45 int m_x,m_y,m_size;
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46 DataType m_data;
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47
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48 public:
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49 /** Create a new QuadNode
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50 * @param parent The parent QuadNode this node is contained in or null.
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51 * @param x The X position of this QuadNode.
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52 * @param y The Y position of this QuadNode.
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53 * @param size The width and height of this QuadNode.
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54 */
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55 QuadNode(QuadNode* parent, int x, int y, int size)
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56 : m_parent(parent),m_x(x),m_y(y),m_size(size),m_data() {
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57 m_nodes[0] = m_nodes[1] = m_nodes[2] = m_nodes[3] = 0L;
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58 }
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59
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60 ~QuadNode() {
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61 delete m_nodes[0];
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62 delete m_nodes[1];
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63 delete m_nodes[2];
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64 delete m_nodes[3];
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65 }
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66
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67 /** Find a container node for a given rectangle.
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68 * This guarantees to return a Node with the following
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69 * properties:
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70 * 1.) The node contains the rectangle (as defined by the contains
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71 * function). 2.) All subnodes can not contain the rectangle or it has the MinimumSize.
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72 * 3.) In case these properties can only be fulfilled by extending the tree upwards,
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73 * that is by creating a new root node - this function will return null.
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74 *
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75 * This function will extend the tree automatically so that this guarantee
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76 * can be fulfilled.
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77 */
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78 QuadNode* find_container(int x, int y, int w, int h);
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79 QuadNode* find_container(const Rect& rect) {
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80 return find_container(rect.x,rect.y,rect.w,rect.h);
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81 }
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82
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83 /** Apply a visitor recursively to the QuadTree
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84 * A visitor is an object which has a @c visit method which
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85 * takes as parameters a pointer to a @c QuadNode and an integer.
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86 * The integer is the depth of the given node.
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87 * If the method returns @c true it is applied recursivly to all
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88 * existing subnodes with a depth increased by one.
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89 * The application happens in Z order (top left, top right, bottom
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90 * left and finally bottom right).
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91 */
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92 template<typename Visitor>
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93 void apply_visitor(Visitor& visitor, int d = 0) {
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94 if( !visitor.visit(this, d) )
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95 return;
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96 if( m_nodes[0] ) m_nodes[0]->apply_visitor(visitor, d + 1);
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97 if( m_nodes[1] ) m_nodes[1]->apply_visitor(visitor, d + 1);
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98 if( m_nodes[2] ) m_nodes[2]->apply_visitor(visitor, d + 1);
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99 if( m_nodes[3] ) m_nodes[3]->apply_visitor(visitor, d + 1);
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100 }
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101
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102 /** Return the X position of the node.
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103 */
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104 int x() const { return m_x; };
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105
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106 /** Return the Y position of the node.
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107 */
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parents:
diff changeset
108 int y() const { return m_y; };
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
109
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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110 /** Return the size (width and height) of the node.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
111 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
112 int size() const { return m_size; };
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
113
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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114 /** Return a reference to the data of the node.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
115 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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116 DataType& data() { return m_data; };
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117
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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118 /** Check whether a rectangle is contained in the node.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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119 * A rectangle is contained in a node, iff:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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120 * @code
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121 * x >= x() and x + w < x() + size() and y >= y() and y + h < y() + size()
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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122 * @endcode
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123 * That is the top and left borders are inclusive, but the right and bottom
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124 * borders are exclusive.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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125 */
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126 bool contains(int x, int y, int w, int h) const;
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127
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128 /// Expand the subnodes - only needed for debugging/profiling worst cases.
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129 void splice();
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130
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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131 /** Return the parent node
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132 */
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133 QuadNode* parent() { return m_parent; };
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134
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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135 /** Create a new parent node for a rectangle
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136 * This will create a new parent node end expand the tree so that
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137 * the given rectangle will eventually be contained after enough calls
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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138 * of this function.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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139 */
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140 QuadNode* create_parent(int x, int y, int w, int h);
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141 protected:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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142 int subnode(int x, int y, int w, int h) const;
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143 };
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144
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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145 /** Dynamic QuadTree
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146 * A space partitioning tree automatically expanding to adjust
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147 * to any object size put into the data structure.
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148 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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149 template<typename DataType, int MinimumSize = 128>
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
150 class QuadTree {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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151 public:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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152 typedef QuadNode<DataType,MinimumSize> Node;
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153
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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154 /** Create a new QuadTree
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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155 * @param x The X position of the starting node.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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156 * @param y The Y position of the starting node.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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157 * @param starting_size The width and height of the starting node.
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158 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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159 QuadTree(int x = 0, int y = 0, int starting_size = MinimumSize) {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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160 assert(starting_size>1);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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161 m_cursor = m_root = new Node(0L,x,y,starting_size);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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162 }
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163
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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164 ~QuadTree() {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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165 assert( m_root->parent() == 0 );
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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166 delete m_root;
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167 }
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168
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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169 /** Find a container node for a given rectangle.
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170 * This guarantees to return a Node with the following
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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171 * properties:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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172 * 1.) The node contains the rectangle (as defined by the contains
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
173 * function). 2.) All subnodes can not contain the rectangle or it has the MinimumSize.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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174 * This function will extend the tree automatically so that this guarantee
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
175 * can be fulfilled.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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176 * This function is optimized for sequential access. This means accessing different rectangles
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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177 * that are 'near' to each other will be fast.
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178 * @warning If you put different sized objects in (for example) lists in the quadnode,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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179 * the returned node will @b not contain all objects which might intersect with the given
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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180 * rectangle.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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181 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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182 Node* find_container(int x, int y, int w, int h);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
183 Node* find_container(const Rect& rect) {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
184 return find_container(rect.x,rect.y,rect.w,rect.h);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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185 }
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186
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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187 /** Apply a visitor recursively to the QuadTree
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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188 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
189 template<typename Visitor>
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
190 Visitor& apply_visitor(Visitor& visitor) {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
191 m_root->apply_visitor(visitor,0);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
192 return visitor;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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193 }
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194
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
195 void clear() {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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196 int x = m_root->x();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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197 int y = m_root->y();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
198 int s = m_root->size();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
199 delete m_root;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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200 m_cursor = m_root = new Node(0L,x,y,s);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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201 }
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202
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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203 protected:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
204 Node *m_root;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
205 Node *m_cursor;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
206 };
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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207
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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208
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
209 template<typename DataType, int MinimumSize>
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
210 inline
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
211 bool QuadNode<DataType,MinimumSize>::contains(int x, int y, int w, int h) const {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
212 if (x < m_x)
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
213 return false;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
214 if (y < m_y)
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
215 return false;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
216 if (x + w >= m_x + m_size)
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
217 return false;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
218 if (y + h >= m_y + m_size)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
219 return false;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
220 return true;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
221 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
222
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
223 template<typename DataType, int MinimumSize>
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
224 inline
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
225 int QuadNode<DataType,MinimumSize>::subnode(int x, int y, int w, int h) const {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
226 /*
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
227 Very small performance impact - roughly 5% for
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
228 the already very fast find_container function.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
229 */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
230 //assert(contains(x,y,w,h));
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
231
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
232 if (x >= m_x + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
233 if (y >= m_y + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
234 return 3;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
235 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
236 if (y + h < m_y + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
237 return 1;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
238 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
239 return -1;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
240 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
241 if (x + w < m_x + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
242 if (y >= m_y + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
243 return 2;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
244 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
245 if (y + h < m_y + m_size/2) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
246 return 0;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
247 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
248 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
249 return -1;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
250 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
251
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
252 template<typename DataType,int MinimumSize>
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
253 QuadNode<DataType,MinimumSize>*
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
254 QuadNode<DataType,MinimumSize>::find_container(int x, int y, int w, int h) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
255 if( !contains(x,y,w,h) ) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
256 if (m_parent) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
257 return m_parent->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
258 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
259 return 0L;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
260 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
261
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
262 if (m_size <= MinimumSize) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
263 return this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
264 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
265
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
266 int r = subnode(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
267 switch(r) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
268 case -1:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
269 return this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
270 case 0:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
271 if( m_nodes[0] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
272 m_nodes[0] = new QuadNode<DataType,MinimumSize>(this,m_x,m_y,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
273 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
274 return m_nodes[0]->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
275 case 1:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
276 if( m_nodes[1] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
277 m_nodes[1] = new QuadNode<DataType,MinimumSize>(this,m_x + m_size/2,m_y,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
278 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
279 return m_nodes[1]->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
280 case 2:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
281 if( m_nodes[2] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
282 m_nodes[2] = new QuadNode<DataType,MinimumSize>(this,m_x,m_y + m_size/2,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
283 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
284 return m_nodes[2]->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
285 case 3:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
286 if( m_nodes[3] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
287 m_nodes[3] = new QuadNode<DataType,MinimumSize>(this,m_x + m_size/2,m_y + m_size/2,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
288 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
289 return m_nodes[3]->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
290 default:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
291 assert("BUG in QuadTree !" == 0);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
292 return 0L;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
293 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
294 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
295
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
296 template<typename DataType,int MinimumSize>
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
297 QuadNode<DataType,MinimumSize>*
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
298 QuadNode<DataType,MinimumSize>::create_parent(int x, int y, int w, int h) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
299 /*
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
300 If used only by the tree, these two are superfluous.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
301 */
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
302 if( contains(x,y,w,h) )
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
303 return this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
304 if( m_parent )
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
305 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
306
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
307 if (x >= m_x) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
308 if (y >= m_y) { // we are node 0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
309 m_parent = new QuadNode(0L,m_x,m_y,m_size*2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
310 m_parent->m_nodes[0] = this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
311 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
312 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
313 if (y + w < m_y + m_size) { // we are node 2
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
314 m_parent = new QuadNode(0L,m_x,m_y - m_size,m_size*2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
315 m_parent->m_nodes[2] = this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
316 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
317 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
318 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
319 if (x + h < m_x + m_size) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
320 if (y >= m_y) { // we are node 1
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
321 m_parent = new QuadNode(0L,m_x-m_size,m_y,m_size*2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
322 m_parent->m_nodes[1] = this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
323 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
324 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
325 if (y + w < m_y + m_size) { // we are node 3
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
326 m_parent = new QuadNode(0L,m_x-m_size,m_y - m_size,m_size*2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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327 m_parent->m_nodes[3] = this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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328 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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329 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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330 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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331
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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332 // It does not matter....
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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333 m_parent = new QuadNode(0L,m_x,m_y,m_size*2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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334 m_parent->m_nodes[0] = this;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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335 return m_parent;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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336 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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337
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
338 template<typename DataType,int MinimumSize>
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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339 void QuadNode<DataType,MinimumSize>::splice() {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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340 if (m_size <= MinimumSize)
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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341 return;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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342
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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343 if( m_nodes[0] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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344 m_nodes[0] = new QuadNode<DataType,MinimumSize>(this,m_x,m_y,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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345 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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346 if( m_nodes[1] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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347 m_nodes[1] = new QuadNode<DataType,MinimumSize>(this,m_x + m_size/2,m_y,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
348 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
349 if( m_nodes[2] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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350 m_nodes[2] = new QuadNode<DataType,MinimumSize>(this,m_x,m_y + m_size/2,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
351 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
352 if( m_nodes[3] == 0) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
353 m_nodes[3] = new QuadNode<DataType,MinimumSize>(this,m_x + m_size/2,m_y + m_size/2,m_size/2);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
354 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
355 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
356
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
357 template<typename DataType,int MinimumSize>
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
358 QuadNode<DataType,MinimumSize>*
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
359 QuadTree<DataType,MinimumSize>::find_container(int x, int y, int w, int h) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
360 m_cursor = m_cursor->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
361 while( m_cursor == 0L ) {
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
362 m_root = m_root->create_parent(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
363 m_cursor = m_root->find_container(x,y,w,h);
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
364 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
365 return m_cursor;
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
366 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
367
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
368
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
369 }
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
370
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
371 #endif // QUADTREE_H