Path.h

//
// Path.h - A path class.
//
 
#ifndef __PATH_H__
#define __PATH_H__
 
// System includes.
#include <vector>
 
// Engine includes.
#include "Color.h"
#include "Vector.h"
 
namespace df {
 
class Path {
 
 private:
  std::vector<Vector> m_path;   ///< Nodes in path.
  int m_index;                  ///< Index of next target node.
 
 public:
  Path();
 
  /// Return next node in path.
  /// Return (-1,-1) if none.
  Vector nextNode() const;
 
  /// Return previous node in path.
  /// Return (-1,-1) if none.
  Vector previousNode() const;
 
  /// Set path.
  void setPath(std::vector<Vector> new_path);
 
  /// Return path.
  std::vector<Vector> getPath() const;
 
  /// Return true when at end of path.
  bool endOfPath() const;
 
  /// Return last node of path.
  Vector getEnd() const;
 
  /// Set index of path.
  /// Return 0 if ok, else -1;
  int setIndex(int new_index);
 
  /// Return index of path.
  int getIndex() const;
 
  /// Draw remaining path in indicated color.
  /// Return 0 if ok, negative if not.
  int draw(Color color) const;
 
  /// Increment path target node.
  /// If at last node, index stays at end.
  Path operator++(int);
};
 
} // end of namespace df
 
#endif // __PATH_H__