-// -*- Mode: C++ -*-
-//
-// dem.c -- DEM management class
+// dem.cxx -- DEM management class
//
// Written by Curtis Olson, started March 1998.
//
-// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
+// Copyright (C) 1998 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
# include <config.h>
#endif
+#include <Include/compiler.h>
+
#include <ctype.h> // isspace()
#include <stdlib.h> // atoi()
#include <math.h> // rint()
#include <stdio.h>
#include <string.h>
-#include <sys/stat.h> // stat()
-#include <errno.h>
+
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h> // stat()
+#endif
+
+#ifdef FG_HAVE_STD_INCLUDES
+# include <cerrno>
+#else
+# include <errno.h>
+#endif
+
#ifdef HAVE_UNISTD_H
# include <unistd.h> // stat()
#endif
-#include <string>
-// #include <zlib/zlib.h>
#include <Misc/fgstream.hxx>
#include <Misc/strutils.hxx>
-#include <Include/compiler.h>
-FG_USING_NAMESPACE(std);
+#include <Include/fg_constants.h>
#include "dem.hxx"
-#include "leastsqs.hxx"
-
-#include <Include/fg_constants.h>
#define MAX_EX_NODES 10000
+#if 0
#ifdef WIN32
# ifdef __BORLANDC__
# include <dir.h>
# define MKDIR(a) mkdir(a,S_IRWXU) // I am just guessing at this flag (NHV)
# endif // __BORLANDC__
#endif // WIN32
+#endif //0
-fgDEM::fgDEM( void ) {
- // printf("class fgDEM CONstructor called.\n");
+FGDem::FGDem( void ) {
+ // cout << "class FGDem CONstructor called." << endl;
dem_data = new float[DEM_SIZE_1][DEM_SIZE_1];
output_data = new float[DEM_SIZE_1][DEM_SIZE_1];
}
-#ifdef WIN32
-
-// return the file path name ( foo/bar/file.ext = foo/bar )
-static void extract_path ( const char *in, char *base) {
- int len, i;
-
- len = strlen (in);
- strcpy (base, in);
-
- i = len - 1;
- while ( (i >= 0) && (in[i] != '/') ) {
- i--;
- }
-
- base[i] = '\0';
-}
-
-
-// Make a subdirectory
-static int my_mkdir (const char *dir) {
- struct stat stat_buf;
- int result;
-
- printf ("mk_dir() ");
-
- result = stat (dir, &stat_buf);
-
- if (result != 0) {
- MKDIR (dir);
- result = stat (dir, &stat_buf);
- if (result != 0) {
- printf ("problem creating %s\n", dir);
- } else {
- printf ("%s created\n", dir);
- }
- } else {
- printf ("%s already exists\n", dir);
- }
+FGDem::FGDem( const string &file ) {
+ // cout << "class FGDem CONstructor called." << endl;
+ dem_data = new float[DEM_SIZE_1][DEM_SIZE_1];
+ output_data = new float[DEM_SIZE_1][DEM_SIZE_1];
- return (result);
+ FGDem::open(file);
}
-#endif // WIN32
-
// open a DEM file
-int fgDEM::open ( const string& file ) {
+int
+FGDem::open ( const string& file ) {
// open input file (or read from stdin)
if ( file == "-" ) {
printf("Loading DEM data file: stdin\n");
// close a DEM file
-int fgDEM::close () {
+int
+FGDem::close () {
// the fg_gzifstream doesn't seem to have a close()
delete in;
// return next token from input stream
-string fgDEM::next_token() {
+string
+FGDem::next_token() {
string token;
- in->stream() >> token;
+ *in >> token;
// cout << " returning " + token + "\n";
// return next integer from input stream
-int fgDEM::next_int() {
+int
+FGDem::next_int() {
int result;
-
- in->stream() >> result;
+
+ *in >> result;
return result;
}
// return next double from input stream
-double fgDEM::next_double() {
+double
+FGDem::next_double() {
double result;
- in->stream() >> result;
+ *in >> result;
return result;
}
// return next exponential num from input stream
-double fgDEM::next_exp() {
+double
+FGDem::next_exp() {
string token;
- double mantissa;
- int exp, acc;
- int i;
token = next_token();
-#if 1
const char* p = token.c_str();
char buf[64];
char* bp = buf;
}
*bp = 0;
return ::atof( buf );
-#else
- sscanf(token.c_str(), "%lfD%d", &mantissa, &exp);
-
- // cout << " Mantissa = " << mantissa << " Exp = " << exp << "\n";
-
- acc = 1;
- if ( exp > 0 ) {
- for ( i = 1; i <= exp; i++ ) {
- acc *= 10;
- }
- } else if ( exp < 0 ) {
- for ( i = -1; i >= exp; i-- ) {
- acc /= 10;
- }
- }
-
- return( (int)rint(mantissa * (double)acc) );
-#endif
}
// read and parse DEM "A" record
-int fgDEM::read_a_record() {
+int
+FGDem::read_a_record() {
int i, inum;
double dnum;
string name, token;
char c;
- char *ptr;
// get the name field (144 characters)
for ( i = 0; i < 144; i++ ) {
i = token.length();
cout << " length = " << i << "\n";
-#if 1
inum = atoi( token.substr( 0, i - 36 ) );
- row_step = atof( token.substr( i - 36, 12 ) );
- col_step = atof( token.substr( i - 24, 12 ) );
- //token.substr( 25, 12 )
-#else
- ptr = token.c_str() + i - 12;
- cout << " last field = " << ptr << " = " << atof(ptr) << "\n";
- ptr[0] = '\0';
-
- ptr = ptr - 12;
- col_step = atof(ptr);
- cout << " last field = " << ptr << " = " << col_step << "\n";
- ptr[0] = '\0';
-
- ptr = ptr - 12;
- row_step = atof(ptr);
- cout << " last field = " << ptr << " = " << row_step << "\n";
- ptr[0] = '\0';
-
- // accuracy code = atod(token)
- ptr = ptr - 12;
- inum = atoi(ptr);
-#endif
+ row_step = atof( token.substr( i - 24, 12 ) );
+ col_step = atof( token.substr( i - 36, 12 ) );
cout << " Accuracy code = " << inum << "\n";
-
cout << " column step = " << col_step <<
" row step = " << row_step << "\n";
// read and parse DEM "B" record
-void fgDEM::read_b_record( ) {
+void
+FGDem::read_b_record( ) {
string token;
int i;
// parse dem file
-int fgDEM::parse( ) {
+int
+FGDem::parse( ) {
int i;
cur_col = 0;
}
-// return the current altitude based on mesh data. We should rewrite
+// write out the area of data covered by the specified bucket. Data
+// is written out column by column starting at the lower left hand
+// corner.
+int
+FGDem::write_area( const string& root, FGBucket& b, bool compress ) {
+ // calculate some boundaries
+ double min_x = ( b.get_center_lon() - 0.5 * b.get_width() ) * 3600.0;
+ double max_x = ( b.get_center_lon() + 0.5 * b.get_width() ) * 3600.0;
+
+ double min_y = ( b.get_center_lat() - 0.5 * b.get_height() ) * 3600.0;
+ double max_y = ( b.get_center_lat() + 0.5 * b.get_height() ) * 3600.0;
+
+ cout << b << endl;
+ cout << "width = " << b.get_width() << " height = " << b.get_height()
+ << endl;
+
+ int start_x = (int)((min_x - originx) / col_step);
+ int span_x = (int)(b.get_width() * 3600.0 / col_step);
+
+ int start_y = (int)((min_y - originy) / row_step);
+ int span_y = (int)(b.get_height() * 3600.0 / row_step);
+
+ cout << "start_x = " << start_x << " span_x = " << span_x << endl;
+ cout << "start_y = " << start_y << " span_y = " << span_y << endl;
+
+ // Do a simple sanity checking. But, please, please be nice to
+ // this write_area() routine and feed it buckets that coincide
+ // well with the underlying grid structure and spacing.
+
+ if ( ( min_x < originx )
+ || ( max_x > originx + cols * col_step )
+ || ( min_y < originy )
+ || ( max_y > originy + rows * row_step ) ) {
+ cout << " ERROR: bucket at least partially outside DEM data range!" <<
+ endl;
+ return 0;
+ }
+
+ // generate output file name
+ string base = b.gen_base_path();
+ string path = root + "/Scenery/" + base;
+ string command = "mkdir -p " + path;
+ system( command.c_str() );
+
+ string demfile = path + "/" + b.gen_index_str() + ".dem";
+ cout << "demfile = " << demfile << endl;
+
+ // write the file
+ FILE *fp;
+ if ( (fp = fopen(demfile.c_str(), "w")) == NULL ) {
+ cout << "cannot open " << demfile << " for writing!" << endl;
+ exit(-1);
+ }
+
+ fprintf( fp, "%d %d\n", (int)min_x, (int)min_y );
+ fprintf( fp, "%d %d %d %d\n", span_x + 1, (int)col_step,
+ span_y + 1, (int)row_step );
+ for ( int i = start_x; i <= start_x + span_x; ++i ) {
+ for ( int j = start_y; j <= start_y + span_y; ++j ) {
+ fprintf( fp, "%d ", (int)dem_data[i][j] );
+ }
+ fprintf( fp, "\n" );
+ }
+ fclose(fp);
+
+ if ( compress ) {
+ string command = "gzip --best -f " + demfile;
+ system( command.c_str() );
+ }
+
+ return 1;
+}
+
+
+#if 0
+
+// return the current altitude based on grid data. We should rewrite
// this to interpolate exact values, but for now this is good enough
-double fgDEM::interpolate_altitude( double lon, double lat ) {
+double FGDem::interpolate_altitude( double lon, double lat ) {
// we expect incoming (lon,lat) to be in arcsec for now
double xlocal, ylocal, dx, dy, zA, zB, elev;
// Use least squares to fit a simpler data set to dem data
-void fgDEM::fit( double error, fgBUCKET *p ) {
+void FGDem::fit( double error, FGBucket& p ) {
double x[DEM_SIZE_1], y[DEM_SIZE_1];
double m, b, ave_error, max_error;
double cury, lasty;
outputmesh_init();
// determine dimensions
- colmin = p->x * ( (cols - 1) / 8);
+ colmin = p.get_x() * ( (cols - 1) / 8);
colmax = colmin + ( (cols - 1) / 8);
- rowmin = p->y * ( (rows - 1) / 8);
+ rowmin = p.get_y() * ( (rows - 1) / 8);
rowmax = rowmin + ( (rows - 1) / 8);
printf("Fitting region = %d,%d to %d,%d\n", colmin, rowmin, colmax, rowmax);
// Initialize output mesh structure
-void fgDEM::outputmesh_init( void ) {
+void FGDem::outputmesh_init( void ) {
int i, j;
for ( j = 0; j < DEM_SIZE_1; j++ ) {
// Get the value of a mesh node
-double fgDEM::outputmesh_get_pt( int i, int j ) {
+double FGDem::outputmesh_get_pt( int i, int j ) {
return ( output_data[i][j] );
}
// Set the value of a mesh node
-void fgDEM::outputmesh_set_pt( int i, int j, double value ) {
+void FGDem::outputmesh_set_pt( int i, int j, double value ) {
// printf("Setting data[%d][%d] = %.2f\n", i, j, value);
output_data[i][j] = value;
}
// Check for an optional "index.node.ex" file in case there is a .poly
// file to go along with this node file. Include these nodes first
// since they are referenced by position from the .poly file.
-void fgDEM::outputmesh_output_nodes( const string& fg_root, fgBUCKET *p ) {
+void FGDem::outputmesh_output_nodes( const string& fg_root, FGBucket& p )
+{
double exnodes[MAX_EX_NODES][3];
struct stat stat_buf;
string dir;
- char base_path[256], file[256], exfile[256];
+ char file[256], exfile[256];
#ifdef WIN32
char tmp_path[256];
#endif
int i, j, count, excount, result;
// determine dimensions
- colmin = p->x * ( (cols - 1) / 8);
+ colmin = p.get_x() * ( (cols - 1) / 8);
colmax = colmin + ( (cols - 1) / 8);
- rowmin = p->y * ( (rows - 1) / 8);
+ rowmin = p.get_y() * ( (rows - 1) / 8);
rowmax = rowmin + ( (rows - 1) / 8);
cout << " dumping region = " << colmin << "," << rowmin << " to " <<
colmax << "," << rowmax << "\n";
// generate the base directory
- fgBucketGenBasePath(p, base_path);
+ string base_path = p.gen_base_path();
cout << "fg_root = " << fg_root << " Base Path = " << base_path << endl;
dir = fg_root + "/Scenery/" + base_path;
cout << "Dir = " << dir << endl;
if ( result != 0 && errno == ENOENT ) {
cout << "Creating directory\n";
-#ifndef WIN32
+// #ifndef WIN32
command = "mkdir -p " + dir + "\n";
system( command.c_str() );
-#else // WIN32
+#if 0
+// #else // WIN32
// Cygwin crashes when trying to output to node file
// explicitly making directory structure seems OK on Win95
dir = fg_root + "/Scenery/" + base_path;
if (my_mkdir ( dir.c_str() )) { exit (-1); }
-#endif // WIN32
+// #endif // WIN32
+#endif //0
} else {
// assume directory exists
}
// get index and generate output file name
- index = fgBucketGenIndex(p);
+ index = p.gen_index();
sprintf(file, "%s/%ld.node", dir.c_str(), index);
// get (optional) extra node file name (in case there is matching
fclose(fd);
}
+#endif
-fgDEM::~fgDEM( void ) {
- // printf("class fgDEM DEstructor called.\n");
+FGDem::~FGDem( void ) {
+ // printf("class FGDem DEstructor called.\n");
delete [] dem_data;
delete [] output_data;
}
// $Log$
+// Revision 1.27 1999/03/25 19:04:36 curt
+// Minor tweaks related to FGBucket usage.
+//
+// Revision 1.26 1999/03/13 17:40:37 curt
+// Moved point interpolation and least squares fitting to contruction program
+// area.
+// Moved leastsqs.* to Lib/Math/
+//
+// Revision 1.25 1999/03/12 22:53:07 curt
+// Added a routine to dump out the portion of the dem data covered by a
+// specified bucket. Other changes related to needs of scenery tools overhaul.
+//
+// Revision 1.24 1999/03/11 23:31:56 curt
+// Tweaks to use newbucket.hxx
+//
+// Revision 1.23 1999/03/10 01:09:12 curt
+// Tweaks to go along with scenery tools overhaul.
+// Added a new constructor that accepts the file name.
+//
+// Revision 1.22 1999/01/19 20:56:56 curt
+// MacOS portability changes contributed by "Robert Puyol" <puyol@abvent.fr>
+//
+// Revision 1.21 1998/11/06 14:04:32 curt
+// Changes due to updates in fgstream.
+//
+// Revision 1.20 1998/10/28 19:38:20 curt
+// Elliminate some unnecessary win32 specific stuff (by Norman Vine)
+//
// Revision 1.19 1998/10/22 21:59:19 curt
// Fixed a couple subtle bugs that resulted from some of my c++ conversions.
// One bug could cause a segfault on certain input, and the other bug could
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