139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
// array.hxx -- Array management class
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//
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// Written by Curtis Olson, started March 1998.
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//
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// Copyright (C) 1998 - 1999 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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// (Log is kept at end of this file)
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#ifndef _ARRAY_HXX
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#define _ARRAY_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include <Bucket/newbucket.hxx>
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#include <Misc/fgstream.hxx>
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#define ARRAY_SIZE 1200
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#define ARRAY_SIZE_1 1201
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class FGArray {
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private:
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// file pointer for input
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// gzFile fd;
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fg_gzifstream *in;
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// coordinates (in arc seconds) of south west corner
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double originx, originy;
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// number of columns and rows
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int cols, rows;
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// Distance between column and row data points (in arc seconds)
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double col_step, row_step;
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// pointers to the actual grid data allocated here
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float (*in_data)[ARRAY_SIZE_1];
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float (*out_data)[ARRAY_SIZE_1];
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// Current "A" Record Information
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// char dem_description[80], dem_quadrangle[80];
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// double dem_x1, dem_y1, dem_x2, dem_y2, dem_x3, dem_y3, dem_x4, dem_y4;
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// double dem_z1, dem_z2;
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// int dem_resolution, dem_num_profiles;
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// Current "B" Record Information
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// int prof_col, prof_row;
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// int prof_num_cols, prof_num_rows;
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// double prof_x1, prof_y1;
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// int prof_data;
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// temporary values for the class to use
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// char option_name[32];
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// int do_data;
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// int cur_col, cur_row;
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// Initialize output mesh structure
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void outputmesh_init( void );
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// Get the value of a mesh node
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double outputmesh_get_pt( int i, int j );
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// Set the value of a mesh node
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void outputmesh_set_pt( int i, int j, double value );
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#if 0
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// Write out a node file that can be used by the "triangle" program
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void outputmesh_output_nodes( const string& fg_root, FGBucket& p );
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#endif
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public:
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// Constructor
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FGArray( void );
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FGArray( const string& file );
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// Destructor
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~FGArray( void );
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// open an Array file (use "-" if input is coming from stdin)
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int open ( const string& file );
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// close a Array file
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int close();
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// parse a Array file
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int parse();
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// Use least squares to fit a simpler data set to dem data
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void fit( double error );
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// return the current altitude based on grid data. We should
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// rewrite this to interpolate exact values, but for now this is
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// good enough
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double interpolate_altitude( double lon, double lat );
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// Informational methods
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inline double get_originx() const { return originx; }
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inline double get_originy() const { return originy; }
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inline int get_cols() const { return cols; }
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inline int get_rows() const { return rows; }
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inline double get_col_step() const { return col_step; }
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inline double get_row_step() const { return row_step; }
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};
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#endif // _ARRAY_HXX
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// $Log$
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// Revision 1.2 1999/03/13 23:50:27 curt
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// Tweaked output formatting a bit.
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//
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// Revision 1.1 1999/03/13 18:45:02 curt
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// Initial revision. (derived from libDEM.a code.)
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//
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