1 // sg_binobj.cxx -- routines to read and write low level flightgear 3d objects
3 // Written by Curtis Olson, started January 2000.
5 // Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or modify
8 // it under the terms of the GNU General Public License as published by
9 // the Free Software Foundation; either version 2 of the License, or
10 // (at your option) any later version.
12 // This program is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <simgear/compiler.h>
33 #include <simgear/bucket/newbucket.hxx>
35 #include "lowlevel.hxx"
36 #include "sg_binobj.hxx"
39 SG_USING_STD( string );
40 SG_USING_STD( vector );
42 #if !defined (SG_HAVE_NATIVE_SGI_COMPILERS)
49 SG_BOUNDING_SPHERE = 0,
58 SG_TRIANGLE_FACES = 10,
59 SG_TRIANGLE_STRIPS = 11,
64 SG_IDX_VERTICES = 0x01,
65 SG_IDX_NORMALS = 0x02,
67 SG_IDX_TEXCOORDS = 0x08
77 class sgSimpleBuffer {
86 inline sgSimpleBuffer( unsigned int s )
92 cout << "Creating a new buffer of size = " << size << endl;
96 inline ~sgSimpleBuffer() {
100 inline unsigned int get_size() const { return size; }
101 inline char *get_ptr() const { return ptr; }
102 inline void resize( unsigned int s ) {
110 cout << "resizing buffer to size = " << size << endl;
111 ptr = new char[size];
117 // calculate the center of a list of points, by taking the halfway
118 // point between the min and max points.
119 static Point3D calc_center( point_list& wgs84_nodes ) {
122 if ( wgs84_nodes.size() ) {
123 min = max = wgs84_nodes[0];
125 min = max = Point3D( 0 );
128 for ( int i = 0; i < (int)wgs84_nodes.size(); ++i ) {
131 if ( p.x() < min.x() ) { min.setx( p.x() ); }
132 if ( p.y() < min.y() ) { min.sety( p.y() ); }
133 if ( p.z() < min.z() ) { min.setz( p.z() ); }
135 if ( p.x() > max.x() ) { max.setx( p.x() ); }
136 if ( p.y() > max.y() ) { max.sety( p.y() ); }
137 if ( p.z() > max.z() ) { max.setz( p.z() ); }
140 return ( min + max ) / 2.0;
143 // calculate the bounding sphere. Center is the center of the
144 // tile and zero elevation
145 double sgCalcBoundingRadius( Point3D center, point_list& wgs84_nodes ) {
147 double radius_squared = 0;
149 for ( int i = 0; i < (int)wgs84_nodes.size(); ++i ) {
150 dist_squared = center.distance3Dsquared( wgs84_nodes[i] );
151 if ( dist_squared > radius_squared ) {
152 radius_squared = dist_squared;
156 return sqrt(radius_squared);
161 // read object properties
162 static void read_object( gzFile fp,
166 group_list *vertices,
169 group_list *texcoords,
170 string_list *materials )
173 unsigned char idx_mask;
175 bool do_vertices, do_normals, do_colors, do_texcoords;
177 static sgSimpleBuffer buf( 32768 ); // 32 Kb
181 if ( obj_type == SG_POINTS ) {
183 idx_mask = SG_IDX_VERTICES;
187 do_texcoords = false;
190 idx_mask = (char)(SG_IDX_VERTICES | SG_IDX_TEXCOORDS);
197 for ( j = 0; j < nproperties; ++j ) {
199 sgReadChar( fp, &prop_type );
201 sgReadUInt( fp, &nbytes );
202 // cout << "property size = " << nbytes << endl;
203 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
204 char *ptr = buf.get_ptr();
205 sgReadBytes( fp, nbytes, ptr );
206 if ( prop_type == SG_MATERIAL ) {
207 strncpy( material, ptr, nbytes );
208 material[nbytes] = '\0';
209 // cout << "material type = " << material << endl;
210 } else if ( prop_type == SG_INDEX_TYPES ) {
212 // cout << "idx_mask = " << (int)idx_mask << endl;
217 do_texcoords = false;
218 if ( idx_mask & SG_IDX_VERTICES ) {
222 if ( idx_mask & SG_IDX_NORMALS ) {
226 if ( idx_mask & SG_IDX_COLORS ) {
230 if ( idx_mask & SG_IDX_TEXCOORDS ) {
237 for ( j = 0; j < nelements; ++j ) {
238 sgReadUInt( fp, &nbytes );
239 // cout << "element size = " << nbytes << endl;
240 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
241 char *ptr = buf.get_ptr();
242 sgReadBytes( fp, nbytes, ptr );
243 int count = nbytes / (idx_size * sizeof(short));
244 short *sptr = (short *)ptr;
245 int_list vs; vs.clear();
246 int_list ns; ns.clear();
247 int_list cs; cs.clear();
248 int_list tcs; tcs.clear();
249 for ( k = 0; k < count; ++k ) {
250 if ( sgIsBigEndian() ) {
251 for ( idx = 0; idx < idx_size; ++idx ) {
252 sgEndianSwap( (unsigned short *)&(sptr[idx]) );
257 vs.push_back( sptr[idx++] );
260 ns.push_back( sptr[idx++] );
263 cs.push_back( sptr[idx++] );
265 if ( do_texcoords ) {
266 tcs.push_back( sptr[idx++] );
268 // cout << sptr[0] << " ";
272 vertices->push_back( vs );
273 normals->push_back( ns );
274 colors->push_back( cs );
275 texcoords->push_back( tcs );
276 materials->push_back( material );
281 // read a binary file and populate the provided structures.
282 bool SGBinObject::read_bin( const string& file ) {
286 static sgSimpleBuffer buf( 32768 ); // 32 Kb
288 // zero out structures
289 gbs_center = Point3D( 0 );
300 pt_materials.clear();
306 tri_materials.clear();
312 strip_materials.clear();
318 fan_materials.clear();
321 if ( (fp = gzopen( file.c_str(), "rb" )) == NULL ) {
322 string filegz = file + ".gz";
323 if ( (fp = gzopen( filegz.c_str(), "rb" )) == NULL ) {
324 cout << "ERROR: opening " << file << " or " << filegz
325 << "for reading!" << endl;
335 sgReadUInt( fp, &header );
336 if ( ((header & 0xFF000000) >> 24) == 'S' &&
337 ((header & 0x00FF0000) >> 16) == 'G' ) {
338 // cout << "Good header" << endl;
340 version = (header & 0x0000FFFF);
341 // cout << "File version = " << version << endl;
343 // close the file before we return
349 // read creation time
350 time_t calendar_time;
351 sgReadLong( fp, &calendar_time );
354 // The following code has a global effect on the host application
355 // and can screws up the time elsewhere. It should be avoided
356 // unless you need this for debugging in which case you should
357 // disable it again once the debugging task is finished.
359 local_tm = localtime( &calendar_time );
361 strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
362 cout << "File created on " << time_str << endl;
365 // read number of top level objects
367 sgReadShort( fp, &nobjects );
368 // cout << "Total objects to read = " << nobjects << endl;
371 for ( i = 0; i < nobjects; ++i ) {
372 // read object header
374 short nproperties, nelements;
375 sgReadChar( fp, &obj_type );
376 sgReadShort( fp, &nproperties );
377 sgReadShort( fp, &nelements );
379 // cout << "object " << i << " = " << (int)obj_type << " props = "
380 // << nproperties << " elements = " << nelements << endl;
382 if ( obj_type == SG_BOUNDING_SPHERE ) {
383 // read bounding sphere properties
384 for ( j = 0; j < nproperties; ++j ) {
386 sgReadChar( fp, &prop_type );
388 sgReadUInt( fp, &nbytes );
389 // cout << "property size = " << nbytes << endl;
390 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
391 char *ptr = buf.get_ptr();
392 sgReadBytes( fp, nbytes, ptr );
395 // read bounding sphere elements
396 for ( j = 0; j < nelements; ++j ) {
397 sgReadUInt( fp, &nbytes );
398 // cout << "element size = " << nbytes << endl;
399 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
400 char *ptr = buf.get_ptr();
401 sgReadBytes( fp, nbytes, ptr );
403 double *dptr = (double *)ptr;
404 if ( sgIsBigEndian() ) {
405 sgEndianSwap( (uint64 *)&(dptr[0]) );
406 sgEndianSwap( (uint64 *)&(dptr[1]) );
407 sgEndianSwap( (uint64 *)&(dptr[2]) );
409 gbs_center = Point3D( dptr[0], dptr[1], dptr[2] );
410 // cout << "Center = " << gbs_center << endl;
411 ptr += sizeof(double) * 3;
413 float *fptr = (float *)ptr;
414 if ( sgIsBigEndian() ) {
415 sgEndianSwap( (unsigned int *)fptr );
417 gbs_radius = fptr[0];
418 // cout << "Bounding radius = " << gbs_radius << endl;
420 } else if ( obj_type == SG_VERTEX_LIST ) {
421 // read vertex list properties
422 for ( j = 0; j < nproperties; ++j ) {
424 sgReadChar( fp, &prop_type );
426 sgReadUInt( fp, &nbytes );
427 // cout << "property size = " << nbytes << endl;
428 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
429 char *ptr = buf.get_ptr();
430 sgReadBytes( fp, nbytes, ptr );
433 // read vertex list elements
434 for ( j = 0; j < nelements; ++j ) {
435 sgReadUInt( fp, &nbytes );
436 // cout << "element size = " << nbytes << endl;
437 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
438 char *ptr = buf.get_ptr();
439 sgReadBytes( fp, nbytes, ptr );
440 int count = nbytes / (sizeof(float) * 3);
441 float *fptr = (float *)ptr;
442 for ( k = 0; k < count; ++k ) {
443 if ( sgIsBigEndian() ) {
444 sgEndianSwap( (unsigned int *)&(fptr[0]) );
445 sgEndianSwap( (unsigned int *)&(fptr[1]) );
446 sgEndianSwap( (unsigned int *)&(fptr[2]) );
448 p = Point3D( fptr[0], fptr[1], fptr[2] );
449 // cout << "node = " << p << endl;
450 wgs84_nodes.push_back( p );
454 } else if ( obj_type == SG_COLOR_LIST ) {
455 // read color list properties
456 for ( j = 0; j < nproperties; ++j ) {
458 sgReadChar( fp, &prop_type );
460 sgReadUInt( fp, &nbytes );
461 // cout << "property size = " << nbytes << endl;
462 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
463 char *ptr = buf.get_ptr();
464 sgReadBytes( fp, nbytes, ptr );
467 // read color list elements
468 for ( j = 0; j < nelements; ++j ) {
469 sgReadUInt( fp, &nbytes );
470 // cout << "element size = " << nbytes << endl;
471 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
472 char *ptr = buf.get_ptr();
473 sgReadBytes( fp, nbytes, ptr );
474 int count = nbytes / (sizeof(float) * 4);
475 float *fptr = (float *)ptr;
476 for ( k = 0; k < count; ++k ) {
477 if ( sgIsBigEndian() ) {
478 sgEndianSwap( (unsigned int *)&(fptr[0]) );
479 sgEndianSwap( (unsigned int *)&(fptr[1]) );
480 sgEndianSwap( (unsigned int *)&(fptr[2]) );
481 sgEndianSwap( (unsigned int *)&(fptr[3]) );
483 p = Point3D( fptr[0], fptr[1], fptr[2] );
484 // cout << "node = " << p << endl;
485 colors.push_back( p );
489 } else if ( obj_type == SG_NORMAL_LIST ) {
490 // read normal list properties
491 for ( j = 0; j < nproperties; ++j ) {
493 sgReadChar( fp, &prop_type );
495 sgReadUInt( fp, &nbytes );
496 // cout << "property size = " << nbytes << endl;
497 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
498 char *ptr = buf.get_ptr();
499 sgReadBytes( fp, nbytes, ptr );
502 // read normal list elements
503 for ( j = 0; j < nelements; ++j ) {
504 sgReadUInt( fp, &nbytes );
505 // cout << "element size = " << nbytes << endl;
506 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
507 unsigned char *ptr = (unsigned char *)(buf.get_ptr());
508 sgReadBytes( fp, nbytes, ptr );
509 int count = nbytes / 3;
510 for ( k = 0; k < count; ++k ) {
513 (ptr[0]) / 127.5 - 1.0,
514 (ptr[1]) / 127.5 - 1.0,
515 (ptr[2]) / 127.5 - 1.0 );
516 sgdNormalizeVec3( normal );
518 p = Point3D( normal[0], normal[1], normal[2] );
519 // cout << "normal = " << p << endl;
520 normals.push_back( p );
524 } else if ( obj_type == SG_TEXCOORD_LIST ) {
525 // read texcoord list properties
526 for ( j = 0; j < nproperties; ++j ) {
528 sgReadChar( fp, &prop_type );
530 sgReadUInt( fp, &nbytes );
531 // cout << "property size = " << nbytes << endl;
532 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
533 char *ptr = buf.get_ptr();
534 sgReadBytes( fp, nbytes, ptr );
537 // read texcoord list elements
538 for ( j = 0; j < nelements; ++j ) {
539 sgReadUInt( fp, &nbytes );
540 // cout << "element size = " << nbytes << endl;
541 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
542 char *ptr = buf.get_ptr();
543 sgReadBytes( fp, nbytes, ptr );
544 int count = nbytes / (sizeof(float) * 2);
545 float *fptr = (float *)ptr;
546 for ( k = 0; k < count; ++k ) {
547 if ( sgIsBigEndian() ) {
548 sgEndianSwap( (unsigned int *)&(fptr[0]) );
549 sgEndianSwap( (unsigned int *)&(fptr[1]) );
551 p = Point3D( fptr[0], fptr[1], 0 );
552 // cout << "texcoord = " << p << endl;
553 texcoords.push_back( p );
557 } else if ( obj_type == SG_POINTS ) {
558 // read point elements
559 read_object( fp, SG_POINTS, nproperties, nelements,
560 &pts_v, &pts_n, &pts_c, &pts_tc, &pt_materials );
561 } else if ( obj_type == SG_TRIANGLE_FACES ) {
562 // read triangle face properties
563 read_object( fp, SG_TRIANGLE_FACES, nproperties, nelements,
564 &tris_v, &tris_n, &tris_c, &tris_tc, &tri_materials );
565 } else if ( obj_type == SG_TRIANGLE_STRIPS ) {
566 // read triangle strip properties
567 read_object( fp, SG_TRIANGLE_STRIPS, nproperties, nelements,
568 &strips_v, &strips_n, &strips_c, &strips_tc,
570 } else if ( obj_type == SG_TRIANGLE_FANS ) {
571 // read triangle fan properties
572 read_object( fp, SG_TRIANGLE_FANS, nproperties, nelements,
573 &fans_v, &fans_n, &fans_c, &fans_tc, &fan_materials );
575 // unknown object type, just skip
578 for ( j = 0; j < nproperties; ++j ) {
580 sgReadChar( fp, &prop_type );
582 sgReadUInt( fp, &nbytes );
583 // cout << "property size = " << nbytes << endl;
584 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
585 char *ptr = buf.get_ptr();
586 sgReadBytes( fp, nbytes, ptr );
590 for ( j = 0; j < nelements; ++j ) {
591 sgReadUInt( fp, &nbytes );
592 // cout << "element size = " << nbytes << endl;
593 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
594 char *ptr = buf.get_ptr();
595 sgReadBytes( fp, nbytes, ptr );
603 if ( sgReadError() ) {
604 cout << "We detected an error while reading the file." << endl;
612 // write out the structures to a binary file. We assume that the
613 // groups come to us sorted by material property. If not, things
614 // don't break, but the result won't be as optimal.
615 bool SGBinObject::write_bin( const string& base, const string& name,
623 unsigned char idx_mask;
626 string dir = base + "/" + b.gen_base_path();
627 string command = "mkdir -p " + dir;
628 #if defined(_MSC_VER) || defined(__MINGW32__)
629 system( (string("mkdir ") + dir).c_str() );
631 system(command.c_str());
634 string file = dir + "/" + name + ".gz";
635 cout << "Output file = " << file << endl;
638 if ( (fp = gzopen( file.c_str(), "wb9" )) == NULL ) {
639 cout << "ERROR: opening " << file << " for writing!" << endl;
645 cout << "points size = " << pts_v.size() << " pt_materials = "
646 << pt_materials.size() << endl;
647 cout << "triangles size = " << tris_v.size() << " tri_materials = "
648 << tri_materials.size() << endl;
649 cout << "strips size = " << strips_v.size() << " strip_materials = "
650 << strip_materials.size() << endl;
651 cout << "fans size = " << fans_v.size() << " fan_materials = "
652 << fan_materials.size() << endl;
654 cout << "nodes = " << wgs84_nodes.size() << endl;
655 cout << "colors = " << colors.size() << endl;
656 cout << "normals = " << normals.size() << endl;
657 cout << "tex coords = " << texcoords.size() << endl;
659 // write header magic
660 sgWriteUInt( fp, SG_FILE_MAGIC_NUMBER );
661 time_t calendar_time = time(NULL);
662 sgWriteLong( fp, (long int)calendar_time );
664 // calculate and write number of top level objects
669 nobjects++; // for gbs
670 nobjects++; // for vertices
671 nobjects++; // for colors
672 nobjects++; // for normals
673 nobjects++; // for texcoords
678 while ( start < (int)pt_materials.size() ) {
679 material = pt_materials[start];
680 while ( (end < (int)pt_materials.size()) &&
681 (material == pt_materials[end]) ) {
685 start = end; end = start + 1;
692 while ( start < (int)tri_materials.size() ) {
693 material = tri_materials[start];
694 while ( (end < (int)tri_materials.size()) &&
695 (material == tri_materials[end]) ) {
699 start = end; end = start + 1;
706 while ( start < (int)strip_materials.size() ) {
707 material = strip_materials[start];
708 while ( (end < (int)strip_materials.size()) &&
709 (material == strip_materials[end]) ) {
713 start = end; end = start + 1;
720 while ( start < (int)fan_materials.size() ) {
721 material = fan_materials[start];
722 while ( (end < (int)fan_materials.size()) &&
723 (material == fan_materials[end]) ) {
727 start = end; end = start + 1;
731 cout << "total top level objects = " << nobjects << endl;
732 sgWriteShort( fp, nobjects );
734 // write bounding sphere
735 sgWriteChar( fp, (char)SG_BOUNDING_SPHERE ); // type
736 sgWriteShort( fp, 0 ); // nproperties
737 sgWriteShort( fp, 1 ); // nelements
739 sgWriteUInt( fp, sizeof(double) * 3 + sizeof(float) ); // nbytes
741 sgdSetVec3( center, gbs_center.x(), gbs_center.y(), gbs_center.z() );
742 sgWritedVec3( fp, center );
743 sgWriteFloat( fp, gbs_radius );
746 sgWriteChar( fp, (char)SG_VERTEX_LIST ); // type
747 sgWriteShort( fp, 0 ); // nproperties
748 sgWriteShort( fp, 1 ); // nelements
749 sgWriteUInt( fp, wgs84_nodes.size() * sizeof(float) * 3 ); // nbytes
750 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
751 p = wgs84_nodes[i] - gbs_center;
752 sgSetVec3( pt, p.x(), p.y(), p.z() );
753 sgWriteVec3( fp, pt );
756 // dump vertex color list
757 sgWriteChar( fp, (char)SG_COLOR_LIST ); // type
758 sgWriteShort( fp, 0 ); // nproperties
759 sgWriteShort( fp, 1 ); // nelements
760 sgWriteUInt( fp, colors.size() * sizeof(float) * 4 ); // nbytes
761 for ( i = 0; i < (int)colors.size(); ++i ) {
763 // Right now we have a place holder for color alpha but we
764 // need to update the interface so the calling program can
766 sgSetVec4( color, p.x(), p.y(), p.z(), 1.0 );
767 sgWriteVec4( fp, color );
770 // dump vertex normal list
771 sgWriteChar( fp, (char)SG_NORMAL_LIST ); // type
772 sgWriteShort( fp, 0 ); // nproperties
773 sgWriteShort( fp, 1 ); // nelements
774 sgWriteUInt( fp, normals.size() * 3 ); // nbytes
776 for ( i = 0; i < (int)normals.size(); ++i ) {
778 normal[0] = (unsigned char)((p.x() + 1.0) * 127.5);
779 normal[1] = (unsigned char)((p.y() + 1.0) * 127.5);
780 normal[2] = (unsigned char)((p.z() + 1.0) * 127.5);
781 sgWriteBytes( fp, 3, normal );
784 // dump texture coordinates
785 sgWriteChar( fp, (char)SG_TEXCOORD_LIST ); // type
786 sgWriteShort( fp, 0 ); // nproperties
787 sgWriteShort( fp, 1 ); // nelements
788 sgWriteUInt( fp, texcoords.size() * sizeof(float) * 2 ); // nbytes
789 for ( i = 0; i < (int)texcoords.size(); ++i ) {
791 sgSetVec2( t, p.x(), p.y() );
792 sgWriteVec2( fp, t );
795 // dump point groups if they exist
796 if ( pts_v.size() > 0 ) {
800 while ( start < (int)pt_materials.size() ) {
802 material = pt_materials[start];
803 while ( (end < (int)pt_materials.size()) &&
804 (material == pt_materials[end]) )
806 // cout << "end = " << end << endl;
809 // cout << "group = " << start << " to " << end - 1 << endl;
811 // write group headers
812 sgWriteChar( fp, (char)SG_POINTS ); // type
813 sgWriteShort( fp, 2 ); // nproperties
814 sgWriteShort( fp, end - start ); // nelements
816 sgWriteChar( fp, (char)SG_MATERIAL ); // property
817 sgWriteUInt( fp, material.length() ); // nbytes
818 sgWriteBytes( fp, material.length(), material.c_str() );
822 if ( pts_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
823 if ( pts_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
824 if ( pts_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
825 if ( pts_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
826 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
827 sgWriteUInt( fp, 1 ); // nbytes
828 sgWriteChar( fp, idx_mask );
831 for ( i = start; i < end; ++i ) {
833 sgWriteUInt( fp, pts_v[i].size() * idx_size * sizeof(short) );
834 for ( j = 0; j < (int)pts_v[i].size(); ++j ) {
835 if ( pts_v.size() ) {
836 sgWriteShort( fp, (short)pts_v[i][j] );
838 if ( pts_n.size() ) {
839 sgWriteShort( fp, (short)pts_n[i][j] );
841 if ( pts_c.size() ) {
842 sgWriteShort( fp, (short)pts_c[i][j] );
844 if ( pts_tc.size() ) {
845 sgWriteShort( fp, (short)pts_tc[i][j] );
855 // dump individual triangles if they exist
856 if ( tris_v.size() > 0 ) {
860 while ( start < (int)tri_materials.size() ) {
862 material = tri_materials[start];
863 while ( (end < (int)tri_materials.size()) &&
864 (material == tri_materials[end]) )
866 // cout << "end = " << end << endl;
869 // cout << "group = " << start << " to " << end - 1 << endl;
871 // write group headers
872 sgWriteChar( fp, (char)SG_TRIANGLE_FACES ); // type
873 sgWriteShort( fp, 2 ); // nproperties
874 sgWriteShort( fp, 1 ); // nelements
876 sgWriteChar( fp, (char)SG_MATERIAL ); // property
877 sgWriteUInt( fp, material.length() ); // nbytes
878 sgWriteBytes( fp, material.length(), material.c_str() );
882 if ( tris_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
883 if ( tris_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
884 if ( tris_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
885 if ( tris_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
886 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
887 sgWriteUInt( fp, 1 ); // nbytes
888 sgWriteChar( fp, idx_mask );
891 sgWriteUInt( fp, (end - start) * 3 * idx_size * sizeof(short) );
894 for ( i = start; i < end; ++i ) {
895 for ( j = 0; j < 3; ++j ) {
896 if ( tris_v.size() ) {
897 sgWriteShort( fp, (short)tris_v[i][j] );
899 if ( tris_n.size() ) {
900 sgWriteShort( fp, (short)tris_n[i][j] );
902 if ( tris_c.size() ) {
903 sgWriteShort( fp, (short)tris_c[i][j] );
905 if ( tris_tc.size() ) {
906 sgWriteShort( fp, (short)tris_tc[i][j] );
916 // dump triangle strips
917 if ( strips_v.size() > 0 ) {
921 while ( start < (int)strip_materials.size() ) {
923 material = strip_materials[start];
924 while ( (end < (int)strip_materials.size()) &&
925 (material == strip_materials[end]) )
927 // cout << "end = " << end << endl;
930 // cout << "group = " << start << " to " << end - 1 << endl;
932 // write group headers
933 sgWriteChar( fp, (char)SG_TRIANGLE_STRIPS ); // type
934 sgWriteShort( fp, 2 ); // nproperties
935 sgWriteShort( fp, end - start ); // nelements
937 sgWriteChar( fp, (char)SG_MATERIAL ); // property
938 sgWriteUInt( fp, material.length() ); // nbytes
939 sgWriteBytes( fp, material.length(), material.c_str() );
943 if ( strips_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
944 if ( strips_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
945 if ( strips_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
946 if ( strips_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size;}
947 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
948 sgWriteUInt( fp, 1 ); // nbytes
949 sgWriteChar( fp, idx_mask );
952 for ( i = start; i < end; ++i ) {
954 sgWriteUInt( fp, strips_v[i].size() * idx_size * sizeof(short));
955 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
956 if ( strips_v.size() ) {
957 sgWriteShort( fp, (short)strips_v[i][j] );
959 if ( strips_n.size() ) {
960 sgWriteShort( fp, (short)strips_n[i][j] );
962 if ( strips_c.size() ) {
963 sgWriteShort( fp, (short)strips_c[i][j] );
965 if ( strips_tc.size() ) {
966 sgWriteShort( fp, (short)strips_tc[i][j] );
976 // dump triangle fans
977 if ( fans_v.size() > 0 ) {
981 while ( start < (int)fan_materials.size() ) {
983 material = fan_materials[start];
984 while ( (end < (int)fan_materials.size()) &&
985 (material == fan_materials[end]) )
987 // cout << "end = " << end << endl;
990 // cout << "group = " << start << " to " << end - 1 << endl;
992 // write group headers
993 sgWriteChar( fp, (char)SG_TRIANGLE_FANS ); // type
994 sgWriteShort( fp, 2 ); // nproperties
995 sgWriteShort( fp, end - start ); // nelements
997 sgWriteChar( fp, (char)SG_MATERIAL ); // property
998 sgWriteUInt( fp, material.length() ); // nbytes
999 sgWriteBytes( fp, material.length(), material.c_str() );
1003 if ( fans_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
1004 if ( fans_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
1005 if ( fans_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
1006 if ( fans_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
1007 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
1008 sgWriteUInt( fp, 1 ); // nbytes
1009 sgWriteChar( fp, idx_mask );
1012 for ( i = start; i < end; ++i ) {
1014 sgWriteUInt( fp, fans_v[i].size() * idx_size * sizeof(short) );
1015 for ( j = 0; j < (int)fans_v[i].size(); ++j ) {
1016 if ( fans_v.size() ) {
1017 sgWriteShort( fp, (short)fans_v[i][j] );
1019 if ( fans_n.size() ) {
1020 sgWriteShort( fp, (short)fans_n[i][j] );
1022 if ( fans_c.size() ) {
1023 sgWriteShort( fp, (short)fans_c[i][j] );
1025 if ( fans_tc.size() ) {
1026 sgWriteShort( fp, (short)fans_tc[i][j] );
1039 if ( sgWriteError() ) {
1040 cout << "We detected an error while writing the file." << endl;
1048 // write out the structures to an ASCII file. We assume that the
1049 // groups come to us sorted by material property. If not, things
1050 // don't break, but the result won't be as optimal.
1051 bool SGBinObject::write_ascii( const string& base, const string& name,
1057 string dir = base + "/" + b.gen_base_path();
1058 string command = "mkdir -p " + dir;
1059 #if defined(_MSC_VER) || defined(__MINGW32__)
1060 system( (string("mkdir ") + dir).c_str() );
1062 system(command.c_str());
1065 // string file = dir + "/" + b.gen_index_str();
1066 string file = dir + "/" + name;
1067 cout << "Output file = " << file << endl;
1070 if ( (fp = fopen( file.c_str(), "w" )) == NULL ) {
1071 cout << "ERROR: opening " << file << " for writing!" << endl;
1075 cout << "triangles size = " << tris_v.size() << " tri_materials = "
1076 << tri_materials.size() << endl;
1077 cout << "strips size = " << strips_v.size() << " strip_materials = "
1078 << strip_materials.size() << endl;
1079 cout << "fans size = " << fans_v.size() << " fan_materials = "
1080 << fan_materials.size() << endl;
1082 cout << "points = " << wgs84_nodes.size() << endl;
1083 cout << "tex coords = " << texcoords.size() << endl;
1085 fprintf(fp, "# FGFS Scenery\n");
1086 fprintf(fp, "# Version %s\n", SG_SCENERY_FILE_FORMAT);
1088 time_t calendar_time = time(NULL);
1089 struct tm *local_tm;
1090 local_tm = localtime( &calendar_time );
1092 strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
1093 fprintf(fp, "# Created %s\n", time_str );
1096 // write bounding sphere
1097 fprintf(fp, "# gbs %.5f %.5f %.5f %.2f\n",
1098 gbs_center.x(), gbs_center.y(), gbs_center.z(), gbs_radius);
1102 fprintf(fp, "# vertex list\n");
1103 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
1104 p = wgs84_nodes[i] - gbs_center;
1106 fprintf(fp, "v %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1110 fprintf(fp, "# vertex normal list\n");
1111 for ( i = 0; i < (int)normals.size(); ++i ) {
1113 fprintf(fp, "vn %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1117 // dump texture coordinates
1118 fprintf(fp, "# texture coordinate list\n");
1119 for ( i = 0; i < (int)texcoords.size(); ++i ) {
1121 fprintf(fp, "vt %.5f %.5f\n", p.x(), p.y() );
1125 // dump individual triangles if they exist
1126 if ( tris_v.size() > 0 ) {
1127 fprintf(fp, "# triangle groups\n");
1132 while ( start < (int)tri_materials.size() ) {
1134 material = tri_materials[start];
1135 while ( (end < (int)tri_materials.size()) &&
1136 (material == tri_materials[end]) )
1138 // cout << "end = " << end << endl;
1141 // cout << "group = " << start << " to " << end - 1 << endl;
1143 // make a list of points for the group
1144 point_list group_nodes;
1145 group_nodes.clear();
1147 double bs_radius = 0;
1148 for ( i = start; i < end; ++i ) {
1149 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1150 group_nodes.push_back( wgs84_nodes[ tris_v[i][j] ] );
1151 bs_center = calc_center( group_nodes );
1152 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1156 // write group headers
1158 fprintf(fp, "# usemtl %s\n", material.c_str());
1159 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1160 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1163 for ( i = start; i < end; ++i ) {
1165 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1166 fprintf(fp, " %d/%d", tris_v[i][j], tris_tc[i][j] );
1176 // dump triangle groups
1177 if ( strips_v.size() > 0 ) {
1178 fprintf(fp, "# triangle strips\n");
1183 while ( start < (int)strip_materials.size() ) {
1185 material = strip_materials[start];
1186 while ( (end < (int)strip_materials.size()) &&
1187 (material == strip_materials[end]) )
1189 // cout << "end = " << end << endl;
1192 // cout << "group = " << start << " to " << end - 1 << endl;
1194 // make a list of points for the group
1195 point_list group_nodes;
1196 group_nodes.clear();
1198 double bs_radius = 0;
1199 for ( i = start; i < end; ++i ) {
1200 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1201 group_nodes.push_back( wgs84_nodes[ strips_v[i][j] ] );
1202 bs_center = calc_center( group_nodes );
1203 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1207 // write group headers
1209 fprintf(fp, "# usemtl %s\n", material.c_str());
1210 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1211 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1214 for ( i = start; i < end; ++i ) {
1216 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1217 fprintf(fp, " %d/%d", strips_v[i][j], strips_tc[i][j] );
1230 command = "gzip --force --best " + file;
1231 system(command.c_str());