// Written by Curtis Olson, started April 1998.
//
-// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
+// Copyright (C) 1998 Curtis L. Olson - http://www.flightgear.org/~curt
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
#include <simgear/compiler.h>
+#include <vector>
+SG_USING_STD(vector);
+
#include STL_STRING
SG_USING_STD(string);
-#define MAX_TABLE_SIZE 32
/**
* A class that provids a simple linear 2d interpolation lookup table.
* variable can be anything.
*/
class SGInterpTable {
+
+ struct Entry
+ {
+ Entry ()
+ : ind(0.0L), dep(0.0L) {}
+ Entry (double independent, double dependent)
+ : ind(independent), dep(dependent) {}
+ double ind;
+ double dep;
+ };
+
int size;
- double table[MAX_TABLE_SIZE][2];
+ vector<Entry> table;
public:
+ /**
+ * Constructor. Creates a new, empty table.
+ */
+ SGInterpTable();
+
/**
* Constructor. Loads the interpolation table from the specified file.
* @param file name of interpolation file
*/
SGInterpTable( const string& file );
+
+ /**
+ * Add an entry to the table, extending the table's length.
+ *
+ * @param ind The independent variable.
+ * @param dep The dependent variable.
+ */
+ void addEntry (double ind, double dep);
+
+
/**
* Given an x value, linearly interpolate the y value from the table.
* @param x independent variable
* @return interpolated dependent variable
*/
- double interpolate(double x);
+ double interpolate(double x) const;
/** Destructor */
~SGInterpTable();