448 lines
11 KiB
Perl
Executable file
448 lines
11 KiB
Perl
Executable file
#!/usr/bin/perl
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#---------------------------------------------------------------------------
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# Toplevel script to automate DEM file processing and conversion
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#
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# Written by Curtis Olson, started January 1998.
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#
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# Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (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,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU 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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#---------------------------------------------------------------------------
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$| = 1; # flush buffers after every write
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$do_dem2node = 1;
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$do_triangle_1 = 1;
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$do_fixnode = 1;
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$do_splittris = 1;
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$do_assemtris = 1;
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$do_triangle_2 = 1;
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$do_tri2obj = 1;
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$do_strips = 1;
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$do_fixobj = 1;
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# set the FG_ROOT environment variable if it hasn't already been set.
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if ( $ENV{FG_ROOT} eq "" ) {
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# look for a file called fgtop as a place marker
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die "You must remember to set the FG_ROOT environment variable!\n";
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}
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if ( $#ARGV < 1 ) {
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die "Usage: $0 <error^2> dem-file1 [ dem-file2 dem-file3 ... ]\n";
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}
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# Start with file.dem
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$error = shift(@ARGV);
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$error += 0.0;
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while ( $dem_file = shift(@ARGV) ) {
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print "Source file = $dem_file Error tolerance = $error\n";
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if ( $error < 0.5 ) {
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die "I doubt you'll be happy with an error tolerance as " .
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"low as $error.\n";
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}
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if ( $do_dem2node ) {
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dem2node() ;
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} else {
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$subdir = "../Scenery/w100n040/w093n045";
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print "WARNING: Hardcoding subdir = $subdir\n";
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}
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triangle_1() if ( $do_triangle_1 );
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fixnode() if ( $do_fixnode );
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splittris() if ( $do_splittris );
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assemtris() if ( $do_assemtris );
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triangle_2() if ( $do_triangle_2);
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tri2obj() if ( $do_tri2obj );
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strips() if ( $do_strips );
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fixobj() if ( $do_fixobj );
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}
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# exit normally
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exit(0);
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# fix command to work with windoze, replaces first "/" with "\\"
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sub fix_command {
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my($in) = @_;
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$system = `uname -s`;
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chop($system);
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if ( $system =~ m/CYGWIN32/ ) {
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$in =~ s/\//\\\\/;
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}
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return($in);
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}
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# return the file name root (ending at last ".")
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sub file_root {
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my($file) = @_;
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my($pos);
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$pos = rindex($file, ".");
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return substr($file, 0, $pos);
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}
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# 1. dem2node $FG_ROOT dem_file tolerance^2 (meters)
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#
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# - dem2node .. dem_file 160000
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#
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# splits dem file into 64 file.node's which contain the
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# irregularly fitted vertices
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sub dem2node {
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$command = "Dem2node/dem2node $ENV{FG_ROOT} $dem_file $error";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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if ( m/^Dir = / ) {
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$subdir = $_;
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$subdir =~ s/^Dir = //;
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chop($subdir);
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}
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}
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close(OUT);
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}
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# 2. triangle -q file (Takes file.node and produces file.1.node and
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# file.1.ele)
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print "Subdirectory for this dem file is $subdir\n";
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sub triangle_1 {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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print $file;
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chop($file);
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if ( ($file =~ m/\.node$/) && ($file !~ m/\.\d\.node$/) ) {
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$command = "Triangle/triangle -q $subdir/$file";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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# remove input file.node
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unlink("$subdir/$file");
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}
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}
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}
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# 3. fixnode file.dem subdir
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#
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# Take the original .dem file (for interpolating Z values) and the
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# subdirecotry containing all the file.1.node's and replace with
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# fixed file.1.node
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sub fixnode {
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$command = "FixNode/fixnode $dem_file $subdir";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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}
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# 4.1 splittris file (.1.node) (.1.ele)
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# Extract the corner, edge, and body vertices (in original
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# geodetic coordinates) and normals (in cartesian coordinates) and
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# save them in something very close to the .obj format as file.se,
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# file.sw, file.nw, file.ne, file.north, file.south, file.east,
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# file.west, and file.body. This way we can reconstruct the
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# region using consistant edges and corners.
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# Arbitration rules: If an opposite edge file already exists,
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# don't create our matching edge. If a corner already exists,
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# don't create ours. Basically, the early bird gets the worm and
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# gets to define the edge verticies and normals. All the other
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# adjacent tiles must use these.
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sub splittris {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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chop($file);
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if ( $file =~ m/\.1\.node$/ ) {
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$file =~ s/\.node$//; # strip off the ".node"
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$command = "SplitTris/splittris $subdir/$file";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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unlink("$subdir/$file.node");
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unlink("$subdir/$file.node.orig");
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unlink("$subdir/$file.ele");
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}
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}
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}
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# 4.2 read in the split of version of the tiles, reconstruct the tile
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# using the proper shared corners and edges. Save as a node file
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# so we can retriangulate.
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sub assemtris {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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chop($file);
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if ( $file =~ m/\.1\.body$/ ) {
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$file =~ s/\.body$//; # strip off the ".body"
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$command = "AssemTris/assemtris $subdir/$file";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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}
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unlink("$subdir/$file.body");
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}
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}
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# 4.3 Retriangulate reassembled files (without -q option) so no new
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# nodes are generated.
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sub triangle_2 {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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print $file;
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chop($file);
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if ( ($file =~ m/\.node$/) && ($file !~ m/\.\d\.node$/) ) {
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$base = $file;
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$base =~ s/\.node$//;
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print("Test for $subdir/$base.q\n");
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if ( -r "$subdir/$base.q" ) {
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# if triangle hangs, we can create a filebase.q for
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# the file it hung on. Then, we test for that file
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# here which causes the incremental algorithm to run
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# (which shouldn't ever hang.)
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$command = "Triangle/triangle -i $subdir/$file";
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} else {
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$command = "Triangle/triangle $subdir/$file";
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}
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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# remove input file.node
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unlink("$subdir/$file");
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}
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}
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}
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# 5. tri2obj file (.1.node) (.1.ele)
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#
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# Take the file.1.node and file.1.ele and produce file.1.obj
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#
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# Extracts normals out of the shared edge/vertex files, and uses
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# the precalcuated normals for these nodes instead of calculating
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# new ones. By sharing normals as well as vertices, not only are
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# the gaps between tiles eliminated, but the colors and lighting
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# transition smoothly across tile boundaries.
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sub tri2obj {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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chop($file);
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if ( $file =~ m/\.1\.node$/ ) {
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$file =~ s/\.node$//; # strip off the ".node"
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$command = "Tri2obj/tri2obj $subdir/$file";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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unlink("$subdir/$file.node");
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unlink("$subdir/$file.node.orig");
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unlink("$subdir/$file.ele");
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}
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}
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}
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# 6. strip file.1.obj
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#
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# Strip the file.1.obj's. Note, strips doesn't handle the minimal
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# case of striping a square correctly.
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#
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# 7. cp bands.d file.2.obj
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#
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# strips produces a file called "bands.d" ... copy this to file.2.obj
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sub strips {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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chop($file);
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if ( $file =~ m/\.1\.obj$/ ) {
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$command = "Stripe_u/strips $subdir/$file";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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# copy to destination file
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$newfile = $file;
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$newfile =~ s/\.1\.obj$//;
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print "Copying to $subdir/$newfile.2.obj\n";
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open(IN, "<bands.d");
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open(OUT, ">$subdir/$newfile.2.obj");
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while ( <IN> ) {
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print OUT $_;
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}
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close(IN);
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close(OUT);
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unlink("$subdir/$file");
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}
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}
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}
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# 8. fixobj file-new
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#
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# Sort file.2.obj by strip winding
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sub fixobj {
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@FILES = `ls $subdir`;
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foreach $file ( @FILES ) {
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chop($file);
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if ( $file =~ m/\.2\.obj$/ ) {
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$newfile = $file;
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$newfile =~ s/\.2\.obj$/.obj/;
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$command = "FixObj/fixobj $subdir/$file $subdir/$newfile";
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$command = fix_command($command);
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print "Running '$command'\n";
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open(OUT, "$command |");
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while ( <OUT> ) {
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print $_;
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}
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close(OUT);
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unlink("$subdir/$file");
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}
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}
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}
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#---------------------------------------------------------------------------
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# $Log$
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# Revision 1.17 1998/04/28 01:23:25 curt
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# Added a work around so that we can get past the "triangle" program
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# hanging, by aborting and rerunning with that tile marked to use the "-i"
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# option.
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#
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# Revision 1.16 1998/04/18 03:57:53 curt
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# Added zlib library support.
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#
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# Revision 1.15 1998/04/08 23:24:07 curt
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# Adopted Gnu automake/autoconf system.
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#
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# Revision 1.14 1998/04/06 21:09:38 curt
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# Additional win32 support.
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# Fixed a bad bug in dem file parsing that was causing the output to be
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# flipped about x = y.
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#
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# Revision 1.13 1998/03/19 02:52:52 curt
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# Updated to reflect some minor tool reorganization and the creation of class
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# to handle DEM processing needs.
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#
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# Revision 1.12 1998/03/19 01:48:35 curt
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# Added gpc-2.01 (generic polygon clipping library)
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#
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# Revision 1.11 1998/03/03 03:36:57 curt
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# Cumulative tweaks.
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#
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# Revision 1.10 1998/02/01 03:42:26 curt
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# Modifications to handle compressed dem files.
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#
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# Revision 1.9 1998/01/27 18:36:54 curt
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# Lots of updates to get back in sync with changes made over in .../Src/
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#
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# Revision 1.8 1998/01/21 17:59:05 curt
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# Uncomment lines to remove several intermediate files.
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#
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# Revision 1.7 1998/01/19 19:51:06 curt
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# A couple final pre-release tweaks.
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#
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# Revision 1.6 1998/01/15 21:33:33 curt
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# Assembling triangles and building a new .node file with the proper shared
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# vertices now works. Now we just have to use the shared normals and we'll
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# be all set.
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#
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# Revision 1.5 1998/01/15 02:50:08 curt
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# Tweaked to add next stage.
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#
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# Revision 1.4 1998/01/14 15:55:34 curt
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# Finished splittris, started assemtris.
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#
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# Revision 1.3 1998/01/14 02:15:52 curt
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# Updated front end script to keep plugging away on tile fitting.
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#
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# Revision 1.2 1998/01/12 20:42:08 curt
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# Working on fitting tiles together in a seamless manner.
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#
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# Revision 1.1 1998/01/09 23:06:46 curt
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# Initial revision.
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#
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