2 // interpolater.hxx -- routines to handle linear interpolation from a table of
3 // x,y The table must be sorted by "x" in ascending order
5 // Written by Curtis Olson, started April 1998.
7 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
9 // This library is free software; you can redistribute it and/or
10 // modify it under the terms of the GNU Library General Public
11 // License as published by the Free Software Foundation; either
12 // version 2 of the License, or (at your option) any later version.
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 // Library General Public License for more details.
19 // You should have received a copy of the GNU Library General Public
20 // License along with this library; if not, write to the
21 // Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 // Boston, MA 02111-1307, USA.
27 #ifndef _INTERPOLATER_H
28 #define _INTERPOLATER_H
32 # error This library requires C++
35 #include <simgear/compiler.h>
40 #define MAX_TABLE_SIZE 32
45 double table[MAX_TABLE_SIZE][2];
49 // Constructor -- loads the interpolation table from the specified
51 fgINTERPTABLE( const string& file );
53 // Given an x value, linearly interpolate the y value from the table
54 double interpolate(double x);
57 ~fgINTERPTABLE( void );
61 #endif // _INTERPOLATER_H