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wayfind.hh
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40 \*===========================================================================*/
41
42 /*===========================================================================*\
43 * *
44 * $Revision$ *
45 * $LastChangedBy$ *
46 * $Date$ *
47 * *
48 \*===========================================================================*/
49
50 #ifndef VSI_WAYFIND_HH
51 #define VSI_WAYFIND_HH
52
53 //== INCLUDES =================================================================
54 #include <QRegion>
55 #include <QPolygonF>
56 #include <QPoint>
57 #include <QLinkedList>
58
59 //== NAMESPACES ===============================================================
60 namespace VSI {
61
62 //== FORWARDDECLARATIONS ======================================================
63 class GraphicsScene;
64 class Connection;
65
66 //== CLASS DEFINITION =========================================================
67
70 class WayFind {
71
72 public:
74 WayFind (GraphicsScene *_scene);
75
77 ~WayFind ();
78
80 QPolygonF findWay (Connection *_conn, QPoint _from, QPoint _to);
81
82 private:
83
84 // Area node class
85 class Node {
86 public:
87
88 // node direction
89 enum Type {
90 Vertical,
91 Horizontal
92 };
93
94 Node (unsigned int _counter);
95 ~Node ();
96
97 public:
98 // last used counter
99 unsigned int counter_;
100
101 // current direction
102 Type type_;
103
104 // neighbor nodes
105 Node *n_[4];
106
107 // linked list handling
108 Node *prev_;
109 Node *next_;
110
111 // node position
112 QPoint pos_;
113
114 // initialized from
115 Node *from_;
116
117 // A-Star consts
118 unsigned int g_;
119 unsigned int f_;
120 unsigned int h_;
121
122 // node cost
123 unsigned int cost_;
124
125 // already traversed
126 bool closed_;
127 };
128
129 // Next position in distance _step from _pnt in direction _dir
130 QPoint validPos (unsigned int _dir, int _step, QPoint _pnt);
131
132 // Heuristic distance from _from to _to
133 int heuristicDistance (const QPoint &_from, const QPoint &_to) const;
134
135 // cleanup ununsed nodes
136 void cleanup ();
137
138 private:
139
140 GraphicsScene *scene_;
141
142 unsigned int counter_;
143
144 QLinkedList<Node *> nodes_;
145 QHash<QPair<int, int>, Node*> map_;
146
147 Node *ll_;
148 QPoint oldFrom_;
149 QRegion oldReg_;
150 };
151
152 }
153
154 #endif
VSI
Definition: baseWidget.cc:78
VSI::WayFind::~WayFind
~WayFind()
Destructor.
Definition: wayfind.cc:92
VSI::WayFind::WayFind
WayFind(GraphicsScene *_scene)
Constructor.
Definition: wayfind.cc:82
VSI::WayFind
Definition: wayfind.hh:70
VSI::GraphicsScene
Definition: graphicsScene.hh:86
VSI::Connection
Definition: connection.hh:72
VSI::WayFind::Node
Definition: wayfind.hh:85
VSI::WayFind::findWay
QPolygonF findWay(Connection *_conn, QPoint _from, QPoint _to)
Finds a way from _from to _to ignoring any already existent connections from _conn.
Definition: wayfind.cc:101