/usr/games/xracer-mkmeshnotex is in xracer-tools 0.96.9.1-8.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 | #!/usr/bin/perl -w
# XRACER (C) 1999-2000 Richard W.M. Jones <rich@annexia.org> and other AUTHORS
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# $Id: xracer-mkmeshnotex.pl,v 1.2 2000/01/16 23:17:00 rich Exp $
# This script is an intermediate hack that we will use until
# I have convinced Ton to add the ability to export meshes with
# texture coordinates to Blender. This script takes a simple
# VideoScape-format mesh, adds textures coordinates to it using
# a very simple algorithm, and exports it as a C file which you
# may link in as a scenery object to your track.
# This script is not very clever about how it generates polygons.
# It can only ever generate discrete triangles, quads and polygons,
# and someone should optimize it to generate triangle fans, triangle
# strips and quad strips where appropriate.
use strict;
use Getopt::Long;
use lib '../../XRacer/blib/lib'; # So you can run this without installing it.
use XRacer::Math;
# Read command line arguments.
my $coutputfilename;
my $texturefilename;
my $cprefix = "object";
my $texscale = 1.0;
my $rottexture = 0;
my $verbose;
my $help;
GetOptions ("outputc=s" => \$coutputfilename,
"texture=s" => \$texturefilename,
"texscale=f" => \$texscale,
"rottexture=i" => \$rottexture,
"cprefix=s" => \$cprefix,
"verbose" => \$verbose,
"help|?" => \$help);
if ($help)
{
print STDERR "$0 [--outputc OUTPUTFILE] --texture TEXTURE [--texscale TEXSCALE] [--rottexture ROTATION] [--cprefix CPREFIX] [--verbose] [INPUTFILE]\n";
print STDERR "where: OUTPUTFILE is the C file to write\n";
print STDERR " TEXTURE is the texture to use\n";
print STDERR " TEXSCALE is the texture scale factor (default: 1.0)\n";
print STDERR " ROTATION is the amount to rotate the texture (in degrees - currently\n";
print STDERR " only 0, 90, 180, 270 are supported)\n";
print STDERR " CPREFIX is the name to use before all C identifiers\n";
print STDERR " INPUTFILE is the input VideoScape file\n";
exit 1;
}
die "texture argument is required" if !defined ($texturefilename);
die "texture rotation must be a multiple of 90 degrees"
if $rottexture != 0 && $rottexture != 90 && $rottexture != 180 &&
$rottexture != 270;
# Read input lines.
my $state = "expect 3DG1";
my $vcount;
my $nr_segments;
my @vertices = ();
my @faces = ();
while (<>)
{
s/[\n\r]+$//g; # Removes trailing CR, LF.
if ($state eq "expect 3DG1")
{
die "expecting first line to be 3DG1" if $_ ne "3DG1";
$state = "expect vcount";
}
elsif ($state eq "expect vcount")
{
die "expecting vertex count" if $_ !~ m/^[1-9][0-9]*$/;
$vcount = $_;
$state = "reading vertices";
}
elsif ($state eq "reading vertices")
{
my @vs = split /[ \t]+/, $_;
push @vertices, { 'vertices' => \@vs };
$vcount--;
$state = "reading faces" if $vcount == 0;
}
elsif ($state eq "reading faces")
{
my @fs = split /[ \t]+/, $_;
shift @fs; # Remove initial number of vertices.
pop @fs; # Remove trailing colour.
push @faces, { 'vertices' => \@fs };
}
}
# Print a summary of the file.
print "number of vertices: ", scalar (@vertices), "\n" if $verbose;
print "number of faces: ", scalar (@faces), "\n" if $verbose;
# Attach texture coordinates to each vertex. To do this, we use a
# very noddy formula: (1) we find the min and max x, y and z coordinates
# over the whole mesh (2) we work out which pair (eg. (x, y)) of these
# coordinates vary the most (3) we set the texture coordinates to range
# over [0,1] over these two axes.
my ($min_x, $min_y, $min_z,
$max_x, $max_y, $max_z) = (1000000, 1000000, 1000000,
-1000000, -1000000, -1000000);
foreach (@vertices)
{
my @vs = @{$_->{vertices}};
if ($vs[0] < $min_x) { $min_x = $vs[0] }
elsif ($vs[0] > $max_x) { $max_x = $vs[0] }
if ($vs[1] < $min_y) { $min_y = $vs[1] }
elsif ($vs[1] > $max_y) { $max_y = $vs[1] }
if ($vs[2] < $min_z) { $min_z = $vs[2] }
elsif ($vs[2] > $max_z) { $max_z = $vs[2] }
}
my $range_x = $max_x - $min_x;
my $range_y = $max_y - $min_y;
my $range_z = $max_z - $min_z;
# Which two axes shall we use?
my (@ords, $usub, $uscale, $vsub, $vscale);
if ($range_x >= $range_z && $range_y >= $range_z)
{
@ords = (0, 1); # Use (x, y).
$usub = $min_x;
$uscale = $range_x;
$vsub = $min_y;
$vscale = $range_y;
}
elsif ($range_x >= $range_y && $range_z >= $range_y)
{
@ords = (0, 2); # Use (x, z).
$usub = $min_x;
$uscale = $range_x;
$vsub = $min_z;
$vscale = $range_z;
}
elsif ($range_y >= $range_x && $range_z >= $range_x)
{
@ords = (1, 2); # Use (y, z).
$usub = $min_y;
$uscale = $range_y;
$vsub = $min_z;
$vscale = $range_z;
}
else
{
die "oops: ranges = ($range_x, $range_y, $range_z)";
}
if ($verbose)
{
print "ords: ($ords[0],$ords[1])\n";
print "usub = $usub, uscale = $uscale, vsub = $vsub, vscale = $vscale\n";
print "x: [$min_x, $max_x] (range: $range_x)\n";
print "y: [$min_y, $max_y] (range: $range_y)\n";
print "z: [$min_z, $max_z] (range: $range_z)\n";
}
# Assign (u, v) texture coordinates to each vertex.
my $vertex;
foreach $vertex (@vertices)
{
my @vs = @{$vertex->{vertices}};
my $u = $texscale * ($vs[$ords[0]] - $usub) / $uscale;
my $v = $texscale * ($vs[$ords[1]] - $vsub) / $vscale;
if ($rottexture == 90)
{
my $c = $v;
$v = $u;
$u = $texscale-$c;
}
elsif ($rottexture == 180)
{
$u = $texscale-$u;
$v = $texscale-$v;
}
elsif ($rottexture == 270)
{
my $c = $v;
$v = $texscale-$u;
$u = $c;
}
$vertex->{texcoords} = [ $u, $v ];
}
# Save what we have to the C output file.
if ($coutputfilename)
{
open C, ">$coutputfilename"
or die "$coutputfilename: $!";
print C "/* This file describes a scenery object.\n * It is automatically generated.\n */\n\n#include \"common.h\"\n\n";
print C "static int tex;\n\n";
# Begin the display function.
print C "void\n${cprefix}_display ()\n";
print C "{\n";
# Write out the vertex array.
print C " static GLfloat va[", 0+@vertices, "][3] = {",
join (", ",
map ({ "{" . $_->{vertices}[0] . ", "
. $_->{vertices}[1] . ", "
. $_->{vertices}[2] . "}" } @vertices)), "};\n";
# Write out the texture coordinate array.
print C " static GLfloat tca[", 0+@vertices, "][2] = {",
join (", ",
map ({ "{" . $_->{texcoords}[0] . ", "
. $_->{texcoords}[1] . "}" } @vertices)), "};\n";
# Drawing prologue.
print C " glEnableClientState (GL_VERTEX_ARRAY);\n";
print C " glEnableClientState (GL_TEXTURE_COORD_ARRAY);\n";
print C " glVertexPointer (3, GL_FLOAT, 0, va);\n";
print C " glTexCoordPointer (2, GL_FLOAT, 0, tca);\n";
print C " glBindTexture (GL_TEXTURE_2D, tex);\n";
# Separate vertices into triangles, quads and polygons.
my @triangles = ();
my @quads = ();
my @polygons = ();
foreach (@faces)
{
if (@{$_->{vertices}} == 3)
{
push @triangles, $_->{vertices};
}
elsif (@{$_->{vertices}} == 4)
{
push @quads, $_->{vertices};
}
elsif (@{$_->{vertices}} > 4)
{
push @polygons, $_->{vertices};
}
}
# Draw triangles.
if (@triangles)
{
print C " glBegin (GL_TRIANGLES);\n";
foreach (@triangles)
{
print C " glArrayElement (", $_->[0], ");\n";
print C " glArrayElement (", $_->[1], ");\n";
print C " glArrayElement (", $_->[2], ");\n";
}
print C " glEnd ();\n";
}
# Draw quads.
if (@quads)
{
print C " glBegin (GL_QUADS);\n";
foreach (@quads)
{
print C " glArrayElement (", $_->[0], ");\n";
print C " glArrayElement (", $_->[1], ");\n";
print C " glArrayElement (", $_->[2], ");\n";
print C " glArrayElement (", $_->[3], ");\n";
}
print C " glEnd ();\n";
}
# Draw polygons.
if (@polygons)
{
print C " glBegin (GL_TRIANGLES);\n";
my $polygon;
foreach $polygon (@polygons)
{
foreach (@$polygon)
{
print C " glArrayElement (", $_, ");\n";
}
}
print C " glEnd ();\n";
}
# Drawing epilogue.
print C " glDisableClientState (GL_TEXTURE_COORD_ARRAY);\n";
print C " glDisableClientState (GL_VERTEX_ARRAY);\n";
print C "}\n\n";
# Generate onload and onunload functions.
print C "int\n${cprefix}_load ()
{
tex = xrTextureLoad (\"$texturefilename\", 0, 0, 0, 1);
if (tex == 0)
{
xrLog (LOG_ERROR, \"cannot load texture: $texturefilename\");
return -1;
}
return 0;
}
void
${cprefix}_unload ()
{
xrTextureUnload (tex);
}
";
print C "/* End of file. */\n";
close C;
}
exit 0;
#----------------------------------------------------------------------
# This small helper function takes a list of either numbers of
# array refs, and returns an equivalent C string for initializing
# a C multi-dimensional array or structure.
sub cinitializer
{
return "{ " . join (", ",
map ({ ref ($_) eq 'ARRAY' ? cinitializer (@$_) : $_ }
@_)) . " }";
}
|