rtvisualizer.h

此文件包含了在linux下实现tpr-tree索引的源代码

// -*- Mode: C++ -*-
//--------------------------------------------------------------------
//      RTvisualizer.h 
//      -------------- 
//      Implements the functionality to visualize an entry, a node or
//      a group of nodes in (space-dimension, time) dimensions.
//      Produces xfig files.
//      Uses the libxfig library by Kazuo Amano.
//
//      Class hierarchy:
//      RTvisualizer
//
//      TPR-tree - Index for continuously moving objects
//      July 2001 release, Aalborg University
//

#ifndef RTVISUALIZER_H
#define RTVISUALIZER_H

#include "rt.h"
#include <stdio.h>
#include <vector>

using namespace std;

//------------------------------------------------
//  RTvisualizer
//
//  Usage: 
//   - call OpenFig to start an xfig file
//   - call Measure for a number of objects (for as few as possible, as
//     all of them are saved in main memory until the first call to
//     Visualize functions)
//   - call Visualize for the same objects and possibly additional
//     objects that are enclosed in these objects
//
//  VisualizeNode performs all these three steps for a single node
//  and its bounding rectangle (computed on the spot).
//  

class RTvisualizer
{
public:
   RTvisualizer() : figFile(NULL), colorMode (false) {}
   ~RTvisualizer();

   // Both OpenFig and VisualizeOneNode return false if fail.  h is
   // used only if all objects are infinite in time, it specifies the
   // extent of the picture in time, otherwise the extent is (max
   // expiration time - CT)
   // 
   bool OpenFig(const char* figName, RTperiod h = 0);    
   bool VisualizeNode(const char* figName, const RTnode& node, RTperiod h = 0);

   void Measure   (const RTnode&  node);
   void Measure  (const RTentry& entry);
   void Visualize (const RTnode&  node,  int color = -1);
   void Visualize (const RTentry& entry, int color = -1);
   void Colorful (bool on = false) { colorMode = on; } 

protected:
   static const int    maxColors = 7;   
   static       double colors[];
   static const double lWidth    = 0.05;
   static const double lStyleInf = 0.8;   // dotted line 
   static const double lStyleExp = 1.0;   // solid line 

   void SetLevelStyle     (int level);
   void VisualizeEntry    (const RTentry& entry);
   void DoMeasurement     ();
   void ResetToBeMeasured ();

   vector<RTkey*> toBeMeasured;   
   double         scaleT;
   double         scaleY;
   double         minY[TPR_MAX_DIMS];

   FILE*          figFile;
   RTperiod       horizon;
   bool           colorMode;
};

#endif   // RTVISUALIZER_H