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flightgear/src/Objects/obj.cxx

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// obj.cxx -- routines to handle "sorta" WaveFront .obj format files.
//
// Written by Curtis Olson, started October 1997.
//
// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// $Id$
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef FG_MATH_EXCEPTION_CLASH
# include <math.h>
#endif
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#include <stdio.h>
#include <string.h>
// #if defined ( __sun__ )
// extern "C" void *memmove(void *, const void *, size_t);
// extern "C" void *memset(void *, int, size_t);
// #endif
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#include <simgear/compiler.h>
#include <simgear/io/sg_binobj.hxx>
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#include STL_STRING
#include <map> // STL
#include <vector> // STL
#include <ctype.h> // isdigit()
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#include <simgear/constants.h>
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#include <simgear/debug/logstream.hxx>
#include <simgear/math/point3d.hxx>
#include <simgear/math/polar3d.hxx>
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#include <simgear/math/sg_geodesy.hxx>
#include <simgear/math/sg_random.h>
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#include <simgear/misc/fgstream.hxx>
#include <simgear/misc/stopwatch.hxx>
#include <simgear/misc/texcoord.hxx>
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#include <Main/globals.hxx>
#include <Scenery/tileentry.hxx>
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#include "matlib.hxx"
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#include "obj.hxx"
FG_USING_STD(string);
FG_USING_STD(vector);
typedef vector < int > int_list;
typedef int_list::iterator int_list_iterator;
typedef int_list::const_iterator int_point_list_iterator;
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static double normals[FG_MAX_NODES][3];
static double tex_coords[FG_MAX_NODES*3][3];
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#define FG_TEX_CONSTANT 69.0
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// Calculate texture coordinates for a given point.
static Point3D local_calc_tex_coords(const Point3D& node, const Point3D& ref) {
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Point3D cp;
Point3D pp;
// double tmplon, tmplat;
// cout << "-> " << node[0] << " " << node[1] << " " << node[2] << endl;
// cout << "-> " << ref.x() << " " << ref.y() << " " << ref.z() << endl;
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cp = Point3D( node[0] + ref.x(),
node[1] + ref.y(),
node[2] + ref.z() );
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pp = sgCartToPolar3d(cp);
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// tmplon = pp.lon() * RAD_TO_DEG;
// tmplat = pp.lat() * RAD_TO_DEG;
// cout << tmplon << " " << tmplat << endl;
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pp.setx( fmod(RAD_TO_DEG * FG_TEX_CONSTANT * pp.x(), 11.0) );
pp.sety( fmod(RAD_TO_DEG * FG_TEX_CONSTANT * pp.y(), 11.0) );
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if ( pp.x() < 0.0 ) {
pp.setx( pp.x() + 11.0 );
}
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if ( pp.y() < 0.0 ) {
pp.sety( pp.y() + 11.0 );
}
// cout << pp << endl;
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return(pp);
}
// Generate a generic ocean tile on the fly
ssgBranch *fgGenTile( const string& path, FGTileEntry *t) {
FGNewMat *newmat;
ssgSimpleState *state = NULL;
ssgBranch *tile = new ssgBranch () ;
tile -> setName ( (char *)path.c_str() ) ;
double tex_width = 1000.0;
// double tex_height;
// find Ocean material in the properties list
newmat = material_lib.find( "Ocean" );
if ( newmat != NULL ) {
// set the texture width and height values for this
// material
tex_width = newmat->get_xsize();
// tex_height = newmat->get_ysize();
// set ssgState
state = newmat->get_state();
} else {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Ack! unknown usemtl name = " << "Ocean"
<< " in " << path );
}
// Calculate center point
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SGBucket b = t->tile_bucket;
double clon = b.get_center_lon();
double clat = b.get_center_lat();
double height = b.get_height();
double width = b.get_width();
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Point3D center = sgGeodToCart(Point3D(clon*DEG_TO_RAD,clat*DEG_TO_RAD,0.0));
t->center = center;
// cout << "center = " << center << endl;;
// Caculate corner vertices
Point3D geod[4];
geod[0] = Point3D( clon - width/2.0, clat - height/2.0, 0.0 );
geod[1] = Point3D( clon + width/2.0, clat - height/2.0, 0.0 );
geod[2] = Point3D( clon + width/2.0, clat + height/2.0, 0.0 );
geod[3] = Point3D( clon - width/2.0, clat + height/2.0, 0.0 );
Point3D rad[4];
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int i;
for ( i = 0; i < 4; ++i ) {
rad[i] = Point3D( geod[i].x() * DEG_TO_RAD, geod[i].y() * DEG_TO_RAD,
geod[i].z() );
}
Point3D cart[4], rel[4];
t->nodes.clear();
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for ( i = 0; i < 4; ++i ) {
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cart[i] = sgGeodToCart(rad[i]);
rel[i] = cart[i] - center;
t->nodes.push_back( rel[i] );
// cout << "corner " << i << " = " << cart[i] << endl;
}
t->ncount = 4;
// Calculate bounding radius
t->bounding_radius = center.distance3D( cart[0] );
// cout << "bounding radius = " << t->bounding_radius << endl;
// Calculate normals
Point3D normals[4];
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for ( i = 0; i < 4; ++i ) {
normals[i] = cart[i];
double length = normals[i].distance3D( Point3D(0.0) );
normals[i] /= length;
// cout << "normal = " << normals[i] << endl;
}
// Calculate texture coordinates
point_list geod_nodes;
geod_nodes.clear();
for ( i = 0; i < 4; ++i ) {
geod_nodes.push_back( geod[i] );
}
int_list rectangle;
rectangle.clear();
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for ( i = 0; i < 4; ++i ) {
rectangle.push_back( i );
}
point_list texs = calc_tex_coords( b, geod_nodes, rectangle,
1000.0 / tex_width );
// Allocate ssg structure
ssgVertexArray *vl = new ssgVertexArray( 4 );
ssgNormalArray *nl = new ssgNormalArray( 4 );
ssgTexCoordArray *tl = new ssgTexCoordArray( 4 );
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ssgColourArray *cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
// sgVec3 *vtlist = new sgVec3 [ 4 ];
// t->vec3_ptrs.push_back( vtlist );
// sgVec3 *vnlist = new sgVec3 [ 4 ];
// t->vec3_ptrs.push_back( vnlist );
// sgVec2 *tclist = new sgVec2 [ 4 ];
// t->vec2_ptrs.push_back( tclist );
sgVec2 tmp2;
sgVec3 tmp3;
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for ( i = 0; i < 4; ++i ) {
sgSetVec3( tmp3,
rel[i].x(), rel[i].y(), rel[i].z() );
vl->add( tmp3 );
sgSetVec3( tmp3,
normals[i].x(), normals[i].y(), normals[i].z() );
nl->add( tmp3 );
sgSetVec2( tmp2, texs[i].x(), texs[i].y());
tl->add( tmp2 );
}
ssgLeaf *leaf =
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new ssgVtxTable ( GL_TRIANGLE_FAN, vl, nl, tl, cl );
leaf->setState( state );
tile->addKid( leaf );
// if ( globals->get_options()->get_clouds() ) {
// fgGenCloudTile(path, t, tile);
// }
return tile;
}
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static float fgTriArea( sgVec3 p0, sgVec3 p1, sgVec3 p2 ) {
/*
From comp.graph.algorithms FAQ
2A(P) = abs(N.(sum_{i=0}^{n-1}(v_i x v_{i+1})))
*/
sgVec3 sum;
sgZeroVec3( sum );
sgVec3 norm;
sgMakeNormal( norm, p0, p1, p2 );
float *vv[3];
vv[0] = p0;
vv[1] = p1;
vv[2] = p2;
for( int i=0; i<3; i++ ) {
int ii = (i+1) % 3;
sum[0] += (vv[i][1] * vv[ii][2] - vv[i][2] * vv[ii][1]) ;
sum[1] += (vv[i][2] * vv[ii][0] - vv[i][0] * vv[ii][2]) ;
sum[2] += (vv[i][0] * vv[ii][1] - vv[i][1] * vv[ii][0]) ;
}
return( sgAbs(sgScalarProductVec3( norm, sum )) * SG_HALF );
}
static void random_pt_inside_tri( float *res,
float *n1, float *n2, float *n3 )
{
sgVec3 p1, p2, p3;
double a = sg_random();
double b = sg_random();
if ( a + b > 1.0 ) {
a = 1.0 - a;
b = 1.0 - b;
}
double c = 1 - a - b;
sgScaleVec3( p1, n1, a );
sgScaleVec3( p2, n2, b );
sgScaleVec3( p3, n3, c );
sgAddVec3( res, p1, p2 );
sgAddVec3( res, p3 );
}
static void gen_random_surface_points( ssgLeaf *leaf, ssgVertexArray *lights,
double factor ) {
int num = leaf->getNumTriangles();
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if ( num > 0 ) {
short int n1, n2, n3;
float *p1, *p2, *p3;
sgVec3 result;
// generate a repeatable random seed
p1 = leaf->getVertex( 0 );
unsigned int *seed = (unsigned int *)p1;
sg_srandom( *seed );
for ( int i = 0; i < num; ++i ) {
leaf->getTriangle( i, &n1, &n2, &n3 );
p1 = leaf->getVertex(n1);
p2 = leaf->getVertex(n2);
p3 = leaf->getVertex(n3);
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double area = fgTriArea( p1, p2, p3 );
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double num = area / factor;
// generate a light point for each unit of area
while ( num > 1.0 ) {
random_pt_inside_tri( result, p1, p2, p3 );
lights->add( result );
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num -= 1.0;
}
// for partial units of area, use a zombie door method to
// create the proper random chance of a light being created
// for this triangle
if ( num > 0.0 ) {
if ( sg_random() <= num ) {
// a zombie made it through our door
random_pt_inside_tri( result, p1, p2, p3 );
lights->add( result );
}
}
}
}
}
// Load an Ascii obj file
static ssgBranch *fgAsciiObjLoad( const string& path, FGTileEntry *t,
ssgVertexArray *lights, const bool is_base)
{
FGNewMat *newmat = NULL;
string material;
float coverage = -1;
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Point3D pp;
// sgVec3 approx_normal;
// double normal[3], scale = 0.0;
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// double x, y, z, xmax, xmin, ymax, ymin, zmax, zmin;
// GLfloat sgenparams[] = { 1.0, 0.0, 0.0, 0.0 };
// GLint display_list = 0;
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int shading;
bool in_faces = false;
int vncount, vtcount;
int n1 = 0, n2 = 0, n3 = 0;
int tex;
// int last1 = 0, last2 = 0;
bool odd = false;
point_list nodes;
Point3D node;
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Point3D center;
double scenery_version = 0.0;
double tex_width = 1000.0, tex_height = 1000.0;
bool shared_done = false;
int_list fan_vertices;
int_list fan_tex_coords;
int i;
ssgSimpleState *state = NULL;
sgVec3 *vtlist, *vnlist;
sgVec2 *tclist;
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ssgBranch *tile = new ssgBranch () ;
tile -> setName ( (char *)path.c_str() ) ;
Changes contributed by Bernie Bright <bbright@c031.aone.net.au> - The new classes in libmisc.tgz define a stream interface into zlib. I've put these in a new directory, Lib/Misc. Feel free to rename it to something more appropriate. However you'll have to change the include directives in all the other files. Additionally you'll have add the library to Lib/Makefile.am and Simulator/Main/Makefile.am. The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf test so I've included the required changes in config.tgz. There are a fair few changes to Simulator/Objects as I've moved things around. Loading tiles is quicker but thats not where the delay is. Tile loading takes a few tenths of a second per file on a P200 but it seems to be the post-processing that leads to a noticeable blip in framerate. I suppose its time to start profiling to see where the delays are. I've included a brief description of each archives contents. Lib/Misc/ zfstream.cxx zfstream.hxx C++ stream interface into zlib. Taken from zlib-1.1.3/contrib/iostream/. Minor mods for STL compatibility. There's no copyright associated with these so I assume they're covered by zlib's. fgstream.cxx fgstream.hxx FlightGear input stream using gz_ifstream. Tries to open the given filename. If that fails then filename is examined and a ".gz" suffix is removed or appended and that file is opened. stopwatch.hxx A simple timer for benchmarking. Not used in production code. Taken from the Blitz++ project. Covered by GPL. strutils.cxx strutils.hxx Some simple string manipulation routines. Simulator/Airports/ Load airports database using fgstream. Changed fgAIRPORTS to use set<> instead of map<>. Added bool fgAIRPORTS::search() as a neater way doing the lookup. Returns true if found. Simulator/Astro/ Modified fgStarsInit() to load stars database using fgstream. Simulator/Objects/ Modified fgObjLoad() to use fgstream. Modified fgMATERIAL_MGR::load_lib() to use fgstream. Many changes to fgMATERIAL. Some changes to fgFRAGMENT but I forget what!
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// Attempt to open "path.gz" or "path"
fg_gzifstream in( path );
if ( ! in.is_open() ) {
FG_LOG( FG_TERRAIN, FG_ALERT, "Cannot open file: " << path );
FG_LOG( FG_TERRAIN, FG_ALERT, "default to ocean tile: " << path );
return NULL;
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}
shading = globals->get_options()->get_shading();
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if ( is_base ) {
t->ncount = 0;
}
vncount = 0;
vtcount = 0;
if ( is_base ) {
t->bounding_radius = 0.0;
}
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center = t->center;
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Changes contributed by Bernie Bright <bbright@c031.aone.net.au> - The new classes in libmisc.tgz define a stream interface into zlib. I've put these in a new directory, Lib/Misc. Feel free to rename it to something more appropriate. However you'll have to change the include directives in all the other files. Additionally you'll have add the library to Lib/Makefile.am and Simulator/Main/Makefile.am. The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf test so I've included the required changes in config.tgz. There are a fair few changes to Simulator/Objects as I've moved things around. Loading tiles is quicker but thats not where the delay is. Tile loading takes a few tenths of a second per file on a P200 but it seems to be the post-processing that leads to a noticeable blip in framerate. I suppose its time to start profiling to see where the delays are. I've included a brief description of each archives contents. Lib/Misc/ zfstream.cxx zfstream.hxx C++ stream interface into zlib. Taken from zlib-1.1.3/contrib/iostream/. Minor mods for STL compatibility. There's no copyright associated with these so I assume they're covered by zlib's. fgstream.cxx fgstream.hxx FlightGear input stream using gz_ifstream. Tries to open the given filename. If that fails then filename is examined and a ".gz" suffix is removed or appended and that file is opened. stopwatch.hxx A simple timer for benchmarking. Not used in production code. Taken from the Blitz++ project. Covered by GPL. strutils.cxx strutils.hxx Some simple string manipulation routines. Simulator/Airports/ Load airports database using fgstream. Changed fgAIRPORTS to use set<> instead of map<>. Added bool fgAIRPORTS::search() as a neater way doing the lookup. Returns true if found. Simulator/Astro/ Modified fgStarsInit() to load stars database using fgstream. Simulator/Objects/ Modified fgObjLoad() to use fgstream. Modified fgMATERIAL_MGR::load_lib() to use fgstream. Many changes to fgMATERIAL. Some changes to fgFRAGMENT but I forget what!
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StopWatch stopwatch;
stopwatch.start();
// ignore initial comments and blank lines. (priming the pump)
// in >> skipcomment;
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// string line;
Changes contributed by Bernie Bright <bbright@c031.aone.net.au> - The new classes in libmisc.tgz define a stream interface into zlib. I've put these in a new directory, Lib/Misc. Feel free to rename it to something more appropriate. However you'll have to change the include directives in all the other files. Additionally you'll have add the library to Lib/Makefile.am and Simulator/Main/Makefile.am. The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf test so I've included the required changes in config.tgz. There are a fair few changes to Simulator/Objects as I've moved things around. Loading tiles is quicker but thats not where the delay is. Tile loading takes a few tenths of a second per file on a P200 but it seems to be the post-processing that leads to a noticeable blip in framerate. I suppose its time to start profiling to see where the delays are. I've included a brief description of each archives contents. Lib/Misc/ zfstream.cxx zfstream.hxx C++ stream interface into zlib. Taken from zlib-1.1.3/contrib/iostream/. Minor mods for STL compatibility. There's no copyright associated with these so I assume they're covered by zlib's. fgstream.cxx fgstream.hxx FlightGear input stream using gz_ifstream. Tries to open the given filename. If that fails then filename is examined and a ".gz" suffix is removed or appended and that file is opened. stopwatch.hxx A simple timer for benchmarking. Not used in production code. Taken from the Blitz++ project. Covered by GPL. strutils.cxx strutils.hxx Some simple string manipulation routines. Simulator/Airports/ Load airports database using fgstream. Changed fgAIRPORTS to use set<> instead of map<>. Added bool fgAIRPORTS::search() as a neater way doing the lookup. Returns true if found. Simulator/Astro/ Modified fgStarsInit() to load stars database using fgstream. Simulator/Objects/ Modified fgObjLoad() to use fgstream. Modified fgMATERIAL_MGR::load_lib() to use fgstream. Many changes to fgMATERIAL. Some changes to fgFRAGMENT but I forget what!
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string token;
char c;
#ifdef __MWERKS__
while ( in.get(c) && c != '\0' ) {
in.putback(c);
#else
while ( ! in.eof() ) {
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#endif
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#if defined( macintosh ) || defined( _MSC_VER )
in >> ::skipws;
#else
in >> skipws;
#endif
if ( in.get( c ) && c == '#' ) {
// process a comment line
// getline( in, line );
// cout << "comment = " << line << endl;
in >> token;
if ( token == "Version" ) {
// read scenery versions number
in >> scenery_version;
// cout << "scenery_version = " << scenery_version << endl;
if ( scenery_version > 0.4 ) {
FG_LOG( FG_TERRAIN, FG_ALERT,
"\nYou are attempting to load a tile format that\n"
<< "is newer than this version of flightgear can\n"
<< "handle. You should upgrade your copy of\n"
<< "FlightGear to the newest version. For\n"
<< "details, please see:\n"
<< "\n http://www.flightgear.org\n" );
exit(-1);
}
} else if ( token == "gbs" ) {
// reference point (center offset)
if ( is_base ) {
in >> t->center >> t->bounding_radius;
} else {
Point3D junk1;
double junk2;
in >> junk1 >> junk2;
}
center = t->center;
// cout << "center = " << center
// << " radius = " << t->bounding_radius << endl;
} else if ( token == "bs" ) {
// reference point (center offset)
// (skip past this)
Point3D junk1;
double junk2;
in >> junk1 >> junk2;
} else if ( token == "usemtl" ) {
// material property specification
// if first usemtl with shared_done = false, then set
// shared_done true and build the ssg shared lists
if ( ! shared_done ) {
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// sanity check
if ( (int)nodes.size() != vncount ) {
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FG_LOG( FG_TERRAIN, FG_ALERT,
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"Tile has mismatched nodes = " << nodes.size()
<< " and normals = " << vncount << " : "
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<< path );
// exit(-1);
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}
shared_done = true;
vtlist = new sgVec3 [ nodes.size() ];
t->vec3_ptrs.push_back( vtlist );
vnlist = new sgVec3 [ vncount ];
t->vec3_ptrs.push_back( vnlist );
tclist = new sgVec2 [ vtcount ];
t->vec2_ptrs.push_back( tclist );
for ( i = 0; i < (int)nodes.size(); ++i ) {
sgSetVec3( vtlist[i],
nodes[i][0], nodes[i][1], nodes[i][2] );
}
for ( i = 0; i < vncount; ++i ) {
sgSetVec3( vnlist[i],
normals[i][0],
normals[i][1],
normals[i][2] );
}
for ( i = 0; i < vtcount; ++i ) {
sgSetVec2( tclist[i],
tex_coords[i][0],
tex_coords[i][1] );
}
}
// display_list = xglGenLists(1);
// xglNewList(display_list, GL_COMPILE);
// printf("xglGenLists(); xglNewList();\n");
in_faces = false;
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// scan the material line
in >> material;
// find this material in the properties list
newmat = material_lib.find( material );
if ( newmat == NULL ) {
// see if this is an on the fly texture
string file = path;
int pos = file.rfind( "/" );
file = file.substr( 0, pos );
cout << "current file = " << file << endl;
file += "/";
file += material;
cout << "current file = " << file << endl;
if ( ! material_lib.add_item( file ) ) {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Ack! unknown usemtl name = " << material
<< " in " << path );
} else {
// locate our newly created material
newmat = material_lib.find( material );
if ( newmat == NULL ) {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Ack! bad on the fly materia create = "
<< material << " in " << path );
}
}
}
if ( newmat != NULL ) {
// set the texture width and height values for this
// material
tex_width = newmat->get_xsize();
tex_height = newmat->get_ysize();
state = newmat->get_state();
coverage = newmat->get_light_coverage();
// cout << "(w) = " << tex_width << " (h) = "
// << tex_width << endl;
} else {
coverage = -1;
}
} else {
// unknown comment, just gobble the input until the
// end of line
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in >> skipeol;
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}
} else {
in.putback( c );
in >> token;
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// cout << "token = " << token << endl;
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if ( token == "vn" ) {
// vertex normal
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if ( vncount < FG_MAX_NODES ) {
in >> normals[vncount][0]
>> normals[vncount][1]
>> normals[vncount][2];
vncount++;
} else {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Read too many vertex normals in " << path
<< " ... dying :-(" );
exit(-1);
}
} else if ( token == "vt" ) {
// vertex texture coordinate
if ( vtcount < FG_MAX_NODES*3 ) {
in >> tex_coords[vtcount][0]
>> tex_coords[vtcount][1];
vtcount++;
} else {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Read too many vertex texture coords in " << path
<< " ... dying :-("
);
exit(-1);
}
} else if ( token == "v" ) {
// node (vertex)
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if ( t->ncount < FG_MAX_NODES ) {
/* in >> nodes[t->ncount][0]
>> nodes[t->ncount][1]
>> nodes[t->ncount][2]; */
in >> node;
nodes.push_back(node);
if ( is_base ) {
t->ncount++;
}
} else {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Read too many nodes in " << path
<< " ... dying :-(");
exit(-1);
}
} else if ( (token == "tf") || (token == "ts") || (token == "f") ) {
// triangle fan, strip, or individual face
// FG_LOG( FG_TERRAIN, FG_INFO, "new fan or strip");
fan_vertices.clear();
fan_tex_coords.clear();
odd = true;
// xglBegin(GL_TRIANGLE_FAN);
in >> n1;
fan_vertices.push_back( n1 );
// xglNormal3dv(normals[n1]);
if ( in.get( c ) && c == '/' ) {
in >> tex;
fan_tex_coords.push_back( tex );
if ( scenery_version >= 0.4 ) {
if ( tex_width > 0 ) {
tclist[tex][0] *= (1000.0 / tex_width);
}
if ( tex_height > 0 ) {
tclist[tex][1] *= (1000.0 / tex_height);
}
}
pp.setx( tex_coords[tex][0] * (1000.0 / tex_width) );
pp.sety( tex_coords[tex][1] * (1000.0 / tex_height) );
} else {
in.putback( c );
pp = local_calc_tex_coords(nodes[n1], center);
}
// xglTexCoord2f(pp.x(), pp.y());
// xglVertex3dv(nodes[n1].get_n());
in >> n2;
fan_vertices.push_back( n2 );
// xglNormal3dv(normals[n2]);
if ( in.get( c ) && c == '/' ) {
in >> tex;
fan_tex_coords.push_back( tex );
if ( scenery_version >= 0.4 ) {
if ( tex_width > 0 ) {
tclist[tex][0] *= (1000.0 / tex_width);
}
if ( tex_height > 0 ) {
tclist[tex][1] *= (1000.0 / tex_height);
}
}
pp.setx( tex_coords[tex][0] * (1000.0 / tex_width) );
pp.sety( tex_coords[tex][1] * (1000.0 / tex_height) );
} else {
in.putback( c );
pp = local_calc_tex_coords(nodes[n2], center);
}
// xglTexCoord2f(pp.x(), pp.y());
// xglVertex3dv(nodes[n2].get_n());
// read all subsequent numbers until next thing isn't a number
while ( true ) {
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#if defined( macintosh ) || defined( _MSC_VER )
in >> ::skipws;
#else
in >> skipws;
#endif
char c;
in.get(c);
in.putback(c);
if ( ! isdigit(c) || in.eof() ) {
break;
}
in >> n3;
fan_vertices.push_back( n3 );
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// cout << " triangle = "
// << n1 << "," << n2 << "," << n3
// << endl;
// xglNormal3dv(normals[n3]);
if ( in.get( c ) && c == '/' ) {
in >> tex;
fan_tex_coords.push_back( tex );
if ( scenery_version >= 0.4 ) {
if ( tex_width > 0 ) {
tclist[tex][0] *= (1000.0 / tex_width);
}
if ( tex_height > 0 ) {
tclist[tex][1] *= (1000.0 / tex_height);
}
}
pp.setx( tex_coords[tex][0] * (1000.0 / tex_width) );
pp.sety( tex_coords[tex][1] * (1000.0 / tex_height) );
} else {
in.putback( c );
pp = local_calc_tex_coords(nodes[n3], center);
}
// xglTexCoord2f(pp.x(), pp.y());
// xglVertex3dv(nodes[n3].get_n());
if ( (token == "tf") || (token == "f") ) {
// triangle fan
n2 = n3;
} else {
// triangle strip
odd = !odd;
n1 = n2;
n2 = n3;
}
}
// xglEnd();
// build the ssg entity
int size = (int)fan_vertices.size();
ssgVertexArray *vl = new ssgVertexArray( size );
ssgNormalArray *nl = new ssgNormalArray( size );
ssgTexCoordArray *tl = new ssgTexCoordArray( size );
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ssgColourArray *cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
sgVec2 tmp2;
sgVec3 tmp3;
for ( i = 0; i < size; ++i ) {
sgCopyVec3( tmp3, vtlist[ fan_vertices[i] ] );
vl -> add( tmp3 );
sgCopyVec3( tmp3, vnlist[ fan_vertices[i] ] );
nl -> add( tmp3 );
sgCopyVec2( tmp2, tclist[ fan_tex_coords[i] ] );
tl -> add( tmp2 );
}
ssgLeaf *leaf = NULL;
if ( token == "tf" ) {
// triangle fan
leaf =
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new ssgVtxTable ( GL_TRIANGLE_FAN, vl, nl, tl, cl );
} else if ( token == "ts" ) {
// triangle strip
leaf =
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new ssgVtxTable ( GL_TRIANGLE_STRIP, vl, nl, tl, cl );
} else if ( token == "f" ) {
// triangle
leaf =
new ssgVtxTable ( GL_TRIANGLES, vl, nl, tl, cl );
}
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// leaf->makeDList();
leaf->setState( state );
tile->addKid( leaf );
if ( is_base ) {
if ( coverage > 0.0 ) {
if ( coverage < 10000.0 ) {
FG_LOG(FG_INPUT, FG_ALERT, "Light coverage is "
<< coverage << ", pushing up to 10000");
coverage = 10000;
}
gen_random_surface_points(leaf, lights, coverage);
}
}
} else {
FG_LOG( FG_TERRAIN, FG_WARN, "Unknown token in "
<< path << " = " << token );
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}
// eat white space before start of while loop so if we are
// done with useful input it is noticed before hand.
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#if defined( macintosh ) || defined( _MSC_VER )
in >> ::skipws;
#else
in >> skipws;
#endif
}
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}
if ( is_base ) {
t->nodes = nodes;
}
stopwatch.stop();
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FG_LOG( FG_TERRAIN, FG_DEBUG,
"Loaded " << path << " in "
<< stopwatch.elapsedSeconds() << " seconds" );
// Generate a cloud layer above the tiles
// if ( globals->get_options()->get_clouds() ) {
// fgGenCloudTile(path, t, tile);
// }
return tile;
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}
static ssgLeaf *gen_leaf( const string& path,
const GLenum ty, const string& material,
const point_list& nodes, const point_list& normals,
const point_list& texcoords,
const int_list& node_index,
const int_list& tex_index,
const bool calc_lights, ssgVertexArray *lights )
{
double tex_width = 1000.0, tex_height = 1000.0;
ssgSimpleState *state = NULL;
float coverage = -1;
int size = node_index.size();
ssgVertexArray *vl = new ssgVertexArray( size );
ssgNormalArray *nl = new ssgNormalArray( size );
ssgTexCoordArray *tl = new ssgTexCoordArray( size );
ssgColourArray *cl = new ssgColourArray( 1 );
sgVec4 color;
sgSetVec4( color, 1.0, 1.0, 1.0, 1.0 );
cl->add( color );
sgVec2 tmp2;
sgVec3 tmp3;
int i;
for ( i = 0; i < size; ++i ) {
Point3D node = nodes[ node_index[i] ];
sgSetVec3( tmp3, node[0], node[1], node[2] );
vl -> add( tmp3 );
Point3D normal = normals[ node_index[i] ];
sgSetVec3( tmp3, normal[0], normal[1], normal[2] );
nl -> add( tmp3 );
Point3D texcoord = texcoords[ tex_index[i] ];
sgSetVec2( tmp2, texcoord[0], texcoord[1] );
tl -> add( tmp2 );
}
cout << "before leaf create" << endl;
ssgLeaf *leaf = new ssgVtxTable ( ty, vl, nl, tl, cl );
cout << "after leaf create" << endl;
// lookup the state record
cout << "looking up material = " << endl;
cout << material << endl;
cout << "'" << endl;
FGNewMat *newmat = material_lib.find( material );
if ( newmat == NULL ) {
// see if this is an on the fly texture
string file = path;
int pos = file.rfind( "/" );
file = file.substr( 0, pos );
cout << "current file = " << file << endl;
file += "/";
file += material;
cout << "current file = " << file << endl;
if ( ! material_lib.add_item( file ) ) {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Ack! unknown usemtl name = " << material
<< " in " << path );
} else {
// locate our newly created material
newmat = material_lib.find( material );
if ( newmat == NULL ) {
FG_LOG( FG_TERRAIN, FG_ALERT,
"Ack! bad on the fly materia create = "
<< material << " in " << path );
}
}
}
if ( newmat != NULL ) {
// set the texture width and height values for this
// material
tex_width = newmat->get_xsize();
tex_height = newmat->get_ysize();
state = newmat->get_state();
coverage = newmat->get_light_coverage();
// cout << "(w) = " << tex_width << " (h) = "
// << tex_width << endl;
} else {
coverage = -1;
}
leaf->setState( state );
if ( calc_lights ) {
if ( coverage > 0.0 ) {
if ( coverage < 10000.0 ) {
FG_LOG(FG_INPUT, FG_ALERT, "Light coverage is "
<< coverage << ", pushing up to 10000");
coverage = 10000;
}
gen_random_surface_points(leaf, lights, coverage);
}
}
return leaf;
}
// Load an Binary obj file
static ssgBranch *fgBinObjLoad( const string& path, FGTileEntry *t,
ssgVertexArray *lights, const bool is_base)
{
int i;
Point3D gbs_center;
float gbs_radius;
point_list offset_nodes; offset_nodes.clear();
point_list normals; normals.clear();
point_list texcoords; texcoords.clear();
// allocate and initialize triangle group structures
group_list tris_v; group_list tris_tc; string_list tri_materials;
tris_v.clear(); tris_tc.clear(); tri_materials.clear();
group_list strips_v; group_list strips_tc; string_list strip_materials;
strips_v.clear(); strips_tc.clear(); strip_materials.clear();
group_list fans_v; group_list fans_tc; string_list fan_materials;
fans_v.clear(); fans_tc.clear(); fan_materials.clear();
bool result = sgReadBinObj( path, gbs_center, &gbs_radius,
offset_nodes, normals, texcoords,
tris_v, tris_tc, tri_materials,
strips_v, strips_tc, strip_materials,
fans_v, fans_tc, fan_materials );
if ( !result ) {
return NULL;
}
cout << "fans size = " << fans_v.size() << " fan_mats size = " <<
fan_materials.size() << endl;
ssgBranch *object = new ssgBranch();
object->setName( (char *)path.c_str() );
if ( is_base && t != NULL ) {
// reference point (center offset/bounding sphere)
t->center = gbs_center;
t->bounding_radius = gbs_radius;
}
// generate triangles
for ( i = 0; i < (int)tris_v.size(); ++i ) {
ssgLeaf *leaf = gen_leaf( path, GL_TRIANGLES, tri_materials[i],
offset_nodes, normals, texcoords,
tris_v[i], tris_tc[i],
is_base, lights );
object->addKid( leaf );
}
// generate strips
for ( i = 0; i < (int)strips_v.size(); ++i ) {
ssgLeaf *leaf = gen_leaf( path, GL_TRIANGLE_STRIP, strip_materials[i],
offset_nodes, normals, texcoords,
strips_v[i], strips_tc[i],
is_base, lights );
object->addKid( leaf );
}
// generate fans
for ( i = 0; i < (int)fans_v.size(); ++i ) {
ssgLeaf *leaf = gen_leaf( path, GL_TRIANGLE_FAN, fan_materials[i],
offset_nodes, normals, texcoords,
fans_v[i], fans_tc[i],
is_base, lights );
object->addKid( leaf );
}
return object;
}
// Load an obj file
ssgBranch *fgObjLoad( const string& path, FGTileEntry *t,
ssgVertexArray *lights, const bool is_base)
{
ssgBranch *result;
// try loading binary format
result = fgBinObjLoad( path, t, lights, is_base );
if ( result == NULL ) {
// next try the older ascii format
result = fgAsciiObjLoad( path, t, lights, is_base );
if ( result == NULL ) {
// default to an ocean tile
result = fgGenTile( path, t );
}
}
return result;
}