-// obj.cxx -- routines to handle "sorta" WaveFront .obj format files.
+// obj.hxx -- routines to handle loading scenery and building the plib
+// scene graph.
//
// Written by Curtis Olson, started October 1997.
//
typedef int_list::const_iterator int_point_list_iterator;
-static double normals[FG_MAX_NODES][3];
-static double tex_coords[FG_MAX_NODES*3][3];
-
// not used because plib branches don't honor call backs.
static int
runway_lights_pretrav (ssgEntity * e, int mask)
}
-#define FG_TEX_CONSTANT 69.0
-
-// Calculate texture coordinates for a given point.
-static Point3D local_calc_tex_coords(const Point3D& node, const Point3D& ref) {
- Point3D cp;
- Point3D pp;
- // double tmplon, tmplat;
-
- // cout << "-> " << node[0] << " " << node[1] << " " << node[2] << endl;
- // cout << "-> " << ref.x() << " " << ref.y() << " " << ref.z() << endl;
-
- cp = Point3D( node[0] + ref.x(),
- node[1] + ref.y(),
- node[2] + ref.z() );
-
- pp = sgCartToPolar3d(cp);
-
- // tmplon = pp.lon() * SGD_RADIANS_TO_DEGREES;
- // tmplat = pp.lat() * SGD_RADIANS_TO_DEGREES;
- // cout << tmplon << " " << tmplat << endl;
-
- pp.setx( fmod(SGD_RADIANS_TO_DEGREES * FG_TEX_CONSTANT * pp.x(), 11.0) );
- pp.sety( fmod(SGD_RADIANS_TO_DEGREES * FG_TEX_CONSTANT * pp.y(), 11.0) );
-
- if ( pp.x() < 0.0 ) {
- pp.setx( pp.x() + 11.0 );
- }
-
- if ( pp.y() < 0.0 ) {
- pp.sety( pp.y() + 11.0 );
- }
-
- // cout << pp << endl;
-
- return(pp);
-}
-
-
// Generate an ocean tile
bool fgGenTile( const string& path, SGBucket b,
Point3D *center,
// Scenery loaders.
////////////////////////////////////////////////////////////////////////
-
-// Load an Ascii obj file
-ssgBranch *fgAsciiObjLoad( const string& path, FGTileEntry *t,
- ssgVertexArray *lights, const bool is_base)
-{
- FGNewMat *newmat = NULL;
- string material;
- float coverage = -1;
- Point3D pp;
- // sgVec3 approx_normal;
- // double normal[3], scale = 0.0;
- // double x, y, z, xmax, xmin, ymax, ymin, zmax, zmin;
- // GLfloat sgenparams[] = { 1.0, 0.0, 0.0, 0.0 };
- // GLint display_list = 0;
- 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;
- 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;
-
- ssgBranch *tile = new ssgBranch () ;
-
- tile -> setName ( (char *)path.c_str() ) ;
-
- // Attempt to open "path.gz" or "path"
- sg_gzifstream in( path );
- if ( ! in.is_open() ) {
- SG_LOG( SG_TERRAIN, SG_DEBUG, "Cannot open file: " << path );
- SG_LOG( SG_TERRAIN, SG_DEBUG, "default to ocean tile: " << path );
-
- delete tile;
-
- return NULL;
- }
-
- shading = fgGetBool("/sim/rendering/shading");
-
- if ( is_base ) {
- t->ncount = 0;
- }
- vncount = 0;
- vtcount = 0;
- if ( is_base ) {
- t->bounding_radius = 0.0;
- }
- center = t->center;
-
- // StopWatch stopwatch;
- // stopwatch.start();
-
- // ignore initial comments and blank lines. (priming the pump)
- // in >> skipcomment;
- // string line;
-
- string token;
- char c;
-
-#ifdef __MWERKS__
- while ( in.get(c) && c != '\0' ) {
- in.putback(c);
-#else
- while ( ! in.eof() ) {
-#endif
- in >> ::skipws;
-
- 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 ) {
- SG_LOG( SG_TERRAIN, SG_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 ) {
- // sanity check
- if ( (int)nodes.size() != vncount ) {
- SG_LOG( SG_TERRAIN, SG_ALERT,
- "Tile has mismatched nodes = " << nodes.size()
- << " and normals = " << vncount << " : "
- << path );
- // exit(-1);
- }
- 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;
-
- // 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 ) ) {
- SG_LOG( SG_TERRAIN, SG_ALERT,
- "Ack! unknown usemtl name = " << material
- << " in " << path );
- } else {
- // locate our newly created material
- newmat = material_lib.find( material );
- if ( newmat == NULL ) {
- SG_LOG( SG_TERRAIN, SG_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
-
- in >> skipeol;
- }
- } else {
- in.putback( c );
-
- in >> token;
-
- // cout << "token = " << token << endl;
-
- if ( token == "vn" ) {
- // vertex normal
- if ( vncount < FG_MAX_NODES ) {
- in >> normals[vncount][0]
- >> normals[vncount][1]
- >> normals[vncount][2];
- vncount++;
- } else {
- SG_LOG( SG_TERRAIN, SG_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 {
- SG_LOG( SG_TERRAIN, SG_ALERT,
- "Read too many vertex texture coords in " << path
- << " ... dying :-("
- );
- exit(-1);
- }
- } else if ( token == "v" ) {
- // node (vertex)
- 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 {
- SG_LOG( SG_TERRAIN, SG_ALERT,
- "Read too many nodes in " << path
- << " ... dying :-(");
- exit(-1);
- }
- } else if ( (token == "tf") || (token == "ts") || (token == "f") ) {
- // triangle fan, strip, or individual face
- // SG_LOG( SG_TERRAIN, SG_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 ) {
- in >> ::skipws;
-
- char c;
- in.get(c);
- in.putback(c);
- if ( ! isdigit(c) || in.eof() ) {
- break;
- }
-
- in >> n3;
- fan_vertices.push_back( n3 );
- // 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 );
- 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 =
- new ssgVtxTable ( GL_TRIANGLE_FAN, vl, nl, tl, cl );
- } else if ( token == "ts" ) {
- // triangle strip
- leaf =
- new ssgVtxTable ( GL_TRIANGLE_STRIP, vl, nl, tl, cl );
- } else if ( token == "f" ) {
- // triangle
- leaf =
- new ssgVtxTable ( GL_TRIANGLES, vl, nl, tl, cl );
- }
- // leaf->makeDList();
- leaf->setState( state );
-
- tile->addKid( leaf );
-
- if ( is_base ) {
- if ( coverage > 0.0 ) {
- if ( coverage < 10000.0 ) {
- SG_LOG(SG_INPUT, SG_ALERT, "Light coverage is "
- << coverage << ", pushing up to 10000");
- coverage = 10000;
- }
- gen_random_surface_points(leaf, lights, coverage);
- }
- }
- } else {
- SG_LOG( SG_TERRAIN, SG_WARN, "Unknown token in "
- << path << " = " << token );
- }
-
- // eat white space before start of while loop so if we are
- // done with useful input it is noticed before hand.
- in >> ::skipws;
- }
- }
-
- if ( is_base ) {
- t->nodes = nodes;
- }
-
- // stopwatch.stop();
- // SG_LOG( SG_TERRAIN, SG_DEBUG,
- // "Loaded " << path << " in "
- // << stopwatch.elapsedSeconds() << " seconds" );
-
- return tile;
-}
-
-
ssgLeaf *gen_leaf( const string& path,
const GLenum ty, const string& material,
const point_list& nodes, const point_list& normals,
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