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 - http://www.flightgear.org/~curt
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.
26 # include <simgear_config.h>
29 #include <simgear/compiler.h>
30 #include <simgear/debug/logstream.hxx>
38 #include <simgear/bucket/newbucket.hxx>
39 #include <simgear/misc/sg_path.hxx>
41 #include "lowlevel.hxx"
42 #include "sg_binobj.hxx"
45 SG_USING_STD( string );
46 SG_USING_STD( vector );
50 SG_BOUNDING_SPHERE = 0,
59 SG_TRIANGLE_FACES = 10,
60 SG_TRIANGLE_STRIPS = 11,
65 SG_IDX_VERTICES = 0x01,
66 SG_IDX_NORMALS = 0x02,
68 SG_IDX_TEXCOORDS = 0x08
77 class sgSimpleBuffer {
86 inline sgSimpleBuffer( unsigned int s )
92 SG_LOG(SG_EVENT, SG_DEBUG, "Creating a new buffer of size = " << size);
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 SG_LOG(SG_EVENT, SG_DEBUG, "resizing buffer to size = " << size);
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 Point3D sgCalcCenter( 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(unsigned short));
244 unsigned short *sptr = (unsigned 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( (uint16_t *)&(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 SG_LOG( SG_EVENT, SG_ALERT,
325 "ERROR: opening " << file << " or " << filegz << "for reading!");
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 unsigned int foo_calendar_time;
351 sgReadUInt( fp, &foo_calendar_time );
354 time_t calendar_time = foo_calendar_time;
355 // The following code has a global effect on the host application
356 // and can screws up the time elsewhere. It should be avoided
357 // unless you need this for debugging in which case you should
358 // disable it again once the debugging task is finished.
360 local_tm = localtime( &calendar_time );
362 strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
363 SG_LOG( SG_EVENT, SG_DEBUG, "File created on " << time_str);
366 // read number of top level objects
368 sgReadShort( fp, &nobjects );
369 // cout << "Total objects to read = " << nobjects << endl;
372 for ( i = 0; i < nobjects; ++i ) {
373 // read object header
375 short nproperties, nelements;
376 sgReadChar( fp, &obj_type );
377 sgReadShort( fp, &nproperties );
378 sgReadShort( fp, &nelements );
380 // cout << "object " << i << " = " << (int)obj_type << " props = "
381 // << nproperties << " elements = " << nelements << endl;
383 if ( obj_type == SG_BOUNDING_SPHERE ) {
384 // read bounding sphere properties
385 for ( j = 0; j < nproperties; ++j ) {
387 sgReadChar( fp, &prop_type );
389 sgReadUInt( fp, &nbytes );
390 // cout << "property size = " << nbytes << endl;
391 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
392 char *ptr = buf.get_ptr();
393 sgReadBytes( fp, nbytes, ptr );
396 // read bounding sphere elements
397 for ( j = 0; j < nelements; ++j ) {
398 sgReadUInt( fp, &nbytes );
399 // cout << "element size = " << nbytes << endl;
400 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
401 char *ptr = buf.get_ptr();
402 sgReadBytes( fp, nbytes, ptr );
404 double *dptr = (double *)ptr;
405 if ( sgIsBigEndian() ) {
406 sgEndianSwap( (uint64_t *)&(dptr[0]) );
407 sgEndianSwap( (uint64_t *)&(dptr[1]) );
408 sgEndianSwap( (uint64_t *)&(dptr[2]) );
410 gbs_center = Point3D( dptr[0], dptr[1], dptr[2] );
411 // cout << "Center = " << gbs_center << endl;
412 ptr += sizeof(double) * 3;
414 float *fptr = (float *)ptr;
415 if ( sgIsBigEndian() ) {
416 sgEndianSwap( (uint32_t *)fptr );
418 gbs_radius = fptr[0];
419 // cout << "Bounding radius = " << gbs_radius << endl;
421 } else if ( obj_type == SG_VERTEX_LIST ) {
422 // read vertex list properties
423 for ( j = 0; j < nproperties; ++j ) {
425 sgReadChar( fp, &prop_type );
427 sgReadUInt( fp, &nbytes );
428 // cout << "property size = " << nbytes << endl;
429 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
430 char *ptr = buf.get_ptr();
431 sgReadBytes( fp, nbytes, ptr );
434 // read vertex list elements
435 for ( j = 0; j < nelements; ++j ) {
436 sgReadUInt( fp, &nbytes );
437 // cout << "element size = " << nbytes << endl;
438 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
439 char *ptr = buf.get_ptr();
440 sgReadBytes( fp, nbytes, ptr );
441 int count = nbytes / (sizeof(float) * 3);
442 float *fptr = (float *)ptr;
443 wgs84_nodes.reserve( count );
444 for ( k = 0; k < count; ++k ) {
445 if ( sgIsBigEndian() ) {
446 sgEndianSwap( (uint32_t *)&(fptr[0]) );
447 sgEndianSwap( (uint32_t *)&(fptr[1]) );
448 sgEndianSwap( (uint32_t *)&(fptr[2]) );
450 wgs84_nodes.push_back( Point3D(fptr[0], fptr[1], fptr[2]) );
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 colors.reserve(count);
477 for ( k = 0; k < count; ++k ) {
478 if ( sgIsBigEndian() ) {
479 sgEndianSwap( (uint32_t *)&(fptr[0]) );
480 sgEndianSwap( (uint32_t *)&(fptr[1]) );
481 sgEndianSwap( (uint32_t *)&(fptr[2]) );
482 sgEndianSwap( (uint32_t *)&(fptr[3]) );
484 colors.push_back( Point3D( fptr[0], fptr[1], fptr[2] ) );
488 } else if ( obj_type == SG_NORMAL_LIST ) {
489 // read normal list properties
490 for ( j = 0; j < nproperties; ++j ) {
492 sgReadChar( fp, &prop_type );
494 sgReadUInt( fp, &nbytes );
495 // cout << "property size = " << nbytes << endl;
496 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
497 char *ptr = buf.get_ptr();
498 sgReadBytes( fp, nbytes, ptr );
501 // read normal list elements
502 for ( j = 0; j < nelements; ++j ) {
503 sgReadUInt( fp, &nbytes );
504 // cout << "element size = " << nbytes << endl;
505 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
506 unsigned char *ptr = (unsigned char *)(buf.get_ptr());
507 sgReadBytes( fp, nbytes, ptr );
508 int count = nbytes / 3;
509 normals.reserve( count );
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 normals.push_back(Point3D(normal[0], normal[1], normal[2]));
522 } else if ( obj_type == SG_TEXCOORD_LIST ) {
523 // read texcoord list properties
524 for ( j = 0; j < nproperties; ++j ) {
526 sgReadChar( fp, &prop_type );
528 sgReadUInt( fp, &nbytes );
529 // cout << "property size = " << nbytes << endl;
530 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
531 char *ptr = buf.get_ptr();
532 sgReadBytes( fp, nbytes, ptr );
535 // read texcoord list elements
536 for ( j = 0; j < nelements; ++j ) {
537 sgReadUInt( fp, &nbytes );
538 // cout << "element size = " << nbytes << endl;
539 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
540 char *ptr = buf.get_ptr();
541 sgReadBytes( fp, nbytes, ptr );
542 int count = nbytes / (sizeof(float) * 2);
543 float *fptr = (float *)ptr;
544 texcoords.reserve(count);
545 for ( k = 0; k < count; ++k ) {
546 if ( sgIsBigEndian() ) {
547 sgEndianSwap( (uint32_t *)&(fptr[0]) );
548 sgEndianSwap( (uint32_t *)&(fptr[1]) );
550 texcoords.push_back( Point3D( fptr[0], fptr[1], 0 ) );
554 } else if ( obj_type == SG_POINTS ) {
555 // read point elements
556 read_object( fp, SG_POINTS, nproperties, nelements,
557 &pts_v, &pts_n, &pts_c, &pts_tc, &pt_materials );
558 } else if ( obj_type == SG_TRIANGLE_FACES ) {
559 // read triangle face properties
560 read_object( fp, SG_TRIANGLE_FACES, nproperties, nelements,
561 &tris_v, &tris_n, &tris_c, &tris_tc, &tri_materials );
562 } else if ( obj_type == SG_TRIANGLE_STRIPS ) {
563 // read triangle strip properties
564 read_object( fp, SG_TRIANGLE_STRIPS, nproperties, nelements,
565 &strips_v, &strips_n, &strips_c, &strips_tc,
567 } else if ( obj_type == SG_TRIANGLE_FANS ) {
568 // read triangle fan properties
569 read_object( fp, SG_TRIANGLE_FANS, nproperties, nelements,
570 &fans_v, &fans_n, &fans_c, &fans_tc, &fan_materials );
572 // unknown object type, just skip
575 for ( j = 0; j < nproperties; ++j ) {
577 sgReadChar( fp, &prop_type );
579 sgReadUInt( fp, &nbytes );
580 // cout << "property size = " << nbytes << endl;
581 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
582 char *ptr = buf.get_ptr();
583 sgReadBytes( fp, nbytes, ptr );
587 for ( j = 0; j < nelements; ++j ) {
588 sgReadUInt( fp, &nbytes );
589 // cout << "element size = " << nbytes << endl;
590 if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
591 char *ptr = buf.get_ptr();
592 sgReadBytes( fp, nbytes, ptr );
600 if ( sgReadError() ) {
601 cout << "We detected an error while reading the file." << endl;
609 // write out the structures to a binary file. We assume that the
610 // groups come to us sorted by material property. If not, things
611 // don't break, but the result won't be as optimal.
612 bool SGBinObject::write_bin( const string& base, const string& name,
620 unsigned char idx_mask;
623 SGPath file = base + "/" + b.gen_base_path() + "/" + name + ".gz";
624 file.create_dir( 0755 );
625 cout << "Output file = " << file.str() << endl;
628 if ( (fp = gzopen( file.c_str(), "wb9" )) == NULL ) {
629 cout << "ERROR: opening " << file.str() << " for writing!" << endl;
635 cout << "points size = " << pts_v.size() << " pt_materials = "
636 << pt_materials.size() << endl;
637 cout << "triangles size = " << tris_v.size() << " tri_materials = "
638 << tri_materials.size() << endl;
639 cout << "strips size = " << strips_v.size() << " strip_materials = "
640 << strip_materials.size() << endl;
641 cout << "fans size = " << fans_v.size() << " fan_materials = "
642 << fan_materials.size() << endl;
644 cout << "nodes = " << wgs84_nodes.size() << endl;
645 cout << "colors = " << colors.size() << endl;
646 cout << "normals = " << normals.size() << endl;
647 cout << "tex coords = " << texcoords.size() << endl;
649 // write header magic
650 sgWriteUInt( fp, SG_FILE_MAGIC_NUMBER );
651 time_t calendar_time = time(NULL);
652 sgWriteLong( fp, (int32_t)calendar_time );
654 // calculate and write number of top level objects
659 nobjects++; // for gbs
660 nobjects++; // for vertices
661 nobjects++; // for colors
662 nobjects++; // for normals
663 nobjects++; // for texcoords
668 while ( start < (int)pt_materials.size() ) {
669 material = pt_materials[start];
670 while ( (end < (int)pt_materials.size()) &&
671 (material == pt_materials[end]) ) {
675 start = end; end = start + 1;
682 while ( start < (int)tri_materials.size() ) {
683 material = tri_materials[start];
684 while ( (end < (int)tri_materials.size()) &&
685 (material == tri_materials[end]) ) {
689 start = end; end = start + 1;
696 while ( start < (int)strip_materials.size() ) {
697 material = strip_materials[start];
698 while ( (end < (int)strip_materials.size()) &&
699 (material == strip_materials[end]) ) {
703 start = end; end = start + 1;
710 while ( start < (int)fan_materials.size() ) {
711 material = fan_materials[start];
712 while ( (end < (int)fan_materials.size()) &&
713 (material == fan_materials[end]) ) {
717 start = end; end = start + 1;
721 cout << "total top level objects = " << nobjects << endl;
722 sgWriteShort( fp, nobjects );
724 // write bounding sphere
725 sgWriteChar( fp, (char)SG_BOUNDING_SPHERE ); // type
726 sgWriteShort( fp, 0 ); // nproperties
727 sgWriteShort( fp, 1 ); // nelements
729 sgWriteUInt( fp, sizeof(double) * 3 + sizeof(float) ); // nbytes
731 sgdSetVec3( center, gbs_center.x(), gbs_center.y(), gbs_center.z() );
732 sgWritedVec3( fp, center );
733 sgWriteFloat( fp, gbs_radius );
736 sgWriteChar( fp, (char)SG_VERTEX_LIST ); // type
737 sgWriteShort( fp, 0 ); // nproperties
738 sgWriteShort( fp, 1 ); // nelements
739 sgWriteUInt( fp, wgs84_nodes.size() * sizeof(float) * 3 ); // nbytes
740 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
741 p = wgs84_nodes[i] - gbs_center;
742 sgSetVec3( pt, p.x(), p.y(), p.z() );
743 sgWriteVec3( fp, pt );
746 // dump vertex color list
747 sgWriteChar( fp, (char)SG_COLOR_LIST ); // type
748 sgWriteShort( fp, 0 ); // nproperties
749 sgWriteShort( fp, 1 ); // nelements
750 sgWriteUInt( fp, colors.size() * sizeof(float) * 4 ); // nbytes
751 for ( i = 0; i < (int)colors.size(); ++i ) {
753 // Right now we have a place holder for color alpha but we
754 // need to update the interface so the calling program can
756 sgSetVec4( color, p.x(), p.y(), p.z(), 1.0 );
757 sgWriteVec4( fp, color );
760 // dump vertex normal list
761 sgWriteChar( fp, (char)SG_NORMAL_LIST ); // type
762 sgWriteShort( fp, 0 ); // nproperties
763 sgWriteShort( fp, 1 ); // nelements
764 sgWriteUInt( fp, normals.size() * 3 ); // nbytes
766 for ( i = 0; i < (int)normals.size(); ++i ) {
768 normal[0] = (unsigned char)((p.x() + 1.0) * 127.5);
769 normal[1] = (unsigned char)((p.y() + 1.0) * 127.5);
770 normal[2] = (unsigned char)((p.z() + 1.0) * 127.5);
771 sgWriteBytes( fp, 3, normal );
774 // dump texture coordinates
775 sgWriteChar( fp, (char)SG_TEXCOORD_LIST ); // type
776 sgWriteShort( fp, 0 ); // nproperties
777 sgWriteShort( fp, 1 ); // nelements
778 sgWriteUInt( fp, texcoords.size() * sizeof(float) * 2 ); // nbytes
779 for ( i = 0; i < (int)texcoords.size(); ++i ) {
781 sgSetVec2( t, p.x(), p.y() );
782 sgWriteVec2( fp, t );
785 // dump point groups if they exist
786 if ( pts_v.size() > 0 ) {
790 while ( start < (int)pt_materials.size() ) {
792 material = pt_materials[start];
793 while ( (end < (int)pt_materials.size()) &&
794 (material == pt_materials[end]) )
796 // cout << "end = " << end << endl;
799 // cout << "group = " << start << " to " << end - 1 << endl;
801 // write group headers
802 sgWriteChar( fp, (char)SG_POINTS ); // type
803 sgWriteShort( fp, 2 ); // nproperties
804 sgWriteShort( fp, end - start ); // nelements
806 sgWriteChar( fp, (char)SG_MATERIAL ); // property
807 sgWriteUInt( fp, material.length() ); // nbytes
808 sgWriteBytes( fp, material.length(), material.c_str() );
812 if ( pts_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
813 if ( pts_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
814 if ( pts_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
815 if ( pts_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
816 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
817 sgWriteUInt( fp, 1 ); // nbytes
818 sgWriteChar( fp, idx_mask );
821 for ( i = start; i < end; ++i ) {
823 sgWriteUInt( fp, pts_v[i].size() * idx_size * sizeof(short) );
824 for ( j = 0; j < (int)pts_v[i].size(); ++j ) {
825 if ( pts_v.size() ) {
826 sgWriteShort( fp, (short)pts_v[i][j] );
828 if ( pts_n.size() ) {
829 sgWriteShort( fp, (short)pts_n[i][j] );
831 if ( pts_c.size() ) {
832 sgWriteShort( fp, (short)pts_c[i][j] );
834 if ( pts_tc.size() ) {
835 sgWriteShort( fp, (short)pts_tc[i][j] );
845 // dump individual triangles if they exist
846 if ( tris_v.size() > 0 ) {
850 while ( start < (int)tri_materials.size() ) {
852 material = tri_materials[start];
853 while ( (end < (int)tri_materials.size()) &&
854 (material == tri_materials[end]) &&
855 3*(end-start) < 32760 )
857 // cout << "end = " << end << endl;
860 // cout << "group = " << start << " to " << end - 1 << endl;
862 // write group headers
863 sgWriteChar( fp, (char)SG_TRIANGLE_FACES ); // type
864 sgWriteShort( fp, 2 ); // nproperties
865 sgWriteShort( fp, 1 ); // nelements
867 sgWriteChar( fp, (char)SG_MATERIAL ); // property
868 sgWriteUInt( fp, material.length() ); // nbytes
869 sgWriteBytes( fp, material.length(), material.c_str() );
873 if ( tris_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
874 if ( tris_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
875 if ( tris_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
876 if ( tris_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
877 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
878 sgWriteUInt( fp, 1 ); // nbytes
879 sgWriteChar( fp, idx_mask );
882 sgWriteUInt( fp, (end - start) * 3 * idx_size * sizeof(short) );
885 for ( i = start; i < end; ++i ) {
886 for ( j = 0; j < 3; ++j ) {
887 if ( tris_v.size() ) {
888 sgWriteShort( fp, (short)tris_v[i][j] );
890 if ( tris_n.size() ) {
891 sgWriteShort( fp, (short)tris_n[i][j] );
893 if ( tris_c.size() ) {
894 sgWriteShort( fp, (short)tris_c[i][j] );
896 if ( tris_tc.size() ) {
897 sgWriteShort( fp, (short)tris_tc[i][j] );
907 // dump triangle strips
908 if ( strips_v.size() > 0 ) {
912 while ( start < (int)strip_materials.size() ) {
914 material = strip_materials[start];
915 while ( (end < (int)strip_materials.size()) &&
916 (material == strip_materials[end]) )
918 // cout << "end = " << end << endl;
921 // cout << "group = " << start << " to " << end - 1 << endl;
923 // write group headers
924 sgWriteChar( fp, (char)SG_TRIANGLE_STRIPS ); // type
925 sgWriteShort( fp, 2 ); // nproperties
926 sgWriteShort( fp, end - start ); // nelements
928 sgWriteChar( fp, (char)SG_MATERIAL ); // property
929 sgWriteUInt( fp, material.length() ); // nbytes
930 sgWriteBytes( fp, material.length(), material.c_str() );
934 if ( strips_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
935 if ( strips_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
936 if ( strips_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
937 if ( strips_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size;}
938 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
939 sgWriteUInt( fp, 1 ); // nbytes
940 sgWriteChar( fp, idx_mask );
943 for ( i = start; i < end; ++i ) {
945 sgWriteUInt( fp, strips_v[i].size() * idx_size * sizeof(short));
946 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
947 if ( strips_v.size() ) {
948 sgWriteShort( fp, (short)strips_v[i][j] );
950 if ( strips_n.size() ) {
951 sgWriteShort( fp, (short)strips_n[i][j] );
953 if ( strips_c.size() ) {
954 sgWriteShort( fp, (short)strips_c[i][j] );
956 if ( strips_tc.size() ) {
957 sgWriteShort( fp, (short)strips_tc[i][j] );
967 // dump triangle fans
968 if ( fans_v.size() > 0 ) {
972 while ( start < (int)fan_materials.size() ) {
974 material = fan_materials[start];
975 while ( (end < (int)fan_materials.size()) &&
976 (material == fan_materials[end]) )
978 // cout << "end = " << end << endl;
981 // cout << "group = " << start << " to " << end - 1 << endl;
983 // write group headers
984 sgWriteChar( fp, (char)SG_TRIANGLE_FANS ); // type
985 sgWriteShort( fp, 2 ); // nproperties
986 sgWriteShort( fp, end - start ); // nelements
988 sgWriteChar( fp, (char)SG_MATERIAL ); // property
989 sgWriteUInt( fp, material.length() ); // nbytes
990 sgWriteBytes( fp, material.length(), material.c_str() );
994 if ( fans_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
995 if ( fans_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
996 if ( fans_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
997 if ( fans_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
998 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
999 sgWriteUInt( fp, 1 ); // nbytes
1000 sgWriteChar( fp, idx_mask );
1003 for ( i = start; i < end; ++i ) {
1005 sgWriteUInt( fp, fans_v[i].size() * idx_size * sizeof(short) );
1006 for ( j = 0; j < (int)fans_v[i].size(); ++j ) {
1007 if ( fans_v.size() ) {
1008 sgWriteShort( fp, (short)fans_v[i][j] );
1010 if ( fans_n.size() ) {
1011 sgWriteShort( fp, (short)fans_n[i][j] );
1013 if ( fans_c.size() ) {
1014 sgWriteShort( fp, (short)fans_c[i][j] );
1016 if ( fans_tc.size() ) {
1017 sgWriteShort( fp, (short)fans_tc[i][j] );
1030 if ( sgWriteError() ) {
1031 cout << "We detected an error while writing the file." << endl;
1039 // write out the structures to an ASCII file. We assume that the
1040 // groups come to us sorted by material property. If not, things
1041 // don't break, but the result won't be as optimal.
1042 bool SGBinObject::write_ascii( const string& base, const string& name,
1048 SGPath file = base + "/" + b.gen_base_path() + "/" + name;
1049 file.create_dir( 0755 );
1050 cout << "Output file = " << file.str() << endl;
1053 if ( (fp = fopen( file.c_str(), "w" )) == NULL ) {
1054 cout << "ERROR: opening " << file.str() << " for writing!" << endl;
1058 cout << "triangles size = " << tris_v.size() << " tri_materials = "
1059 << tri_materials.size() << endl;
1060 cout << "strips size = " << strips_v.size() << " strip_materials = "
1061 << strip_materials.size() << endl;
1062 cout << "fans size = " << fans_v.size() << " fan_materials = "
1063 << fan_materials.size() << endl;
1065 cout << "points = " << wgs84_nodes.size() << endl;
1066 cout << "tex coords = " << texcoords.size() << endl;
1068 fprintf(fp, "# FGFS Scenery\n");
1069 fprintf(fp, "# Version %s\n", SG_SCENERY_FILE_FORMAT);
1071 time_t calendar_time = time(NULL);
1072 struct tm *local_tm;
1073 local_tm = localtime( &calendar_time );
1075 strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
1076 fprintf(fp, "# Created %s\n", time_str );
1079 // write bounding sphere
1080 fprintf(fp, "# gbs %.5f %.5f %.5f %.2f\n",
1081 gbs_center.x(), gbs_center.y(), gbs_center.z(), gbs_radius);
1085 fprintf(fp, "# vertex list\n");
1086 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
1087 p = wgs84_nodes[i] - gbs_center;
1089 fprintf(fp, "v %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1093 fprintf(fp, "# vertex normal list\n");
1094 for ( i = 0; i < (int)normals.size(); ++i ) {
1096 fprintf(fp, "vn %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1100 // dump texture coordinates
1101 fprintf(fp, "# texture coordinate list\n");
1102 for ( i = 0; i < (int)texcoords.size(); ++i ) {
1104 fprintf(fp, "vt %.5f %.5f\n", p.x(), p.y() );
1108 // dump individual triangles if they exist
1109 if ( tris_v.size() > 0 ) {
1110 fprintf(fp, "# triangle groups\n");
1115 while ( start < (int)tri_materials.size() ) {
1117 material = tri_materials[start];
1118 while ( (end < (int)tri_materials.size()) &&
1119 (material == tri_materials[end]) )
1121 // cout << "end = " << end << endl;
1124 // cout << "group = " << start << " to " << end - 1 << endl;
1126 // make a list of points for the group
1127 point_list group_nodes;
1128 group_nodes.clear();
1130 double bs_radius = 0;
1131 for ( i = start; i < end; ++i ) {
1132 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1133 group_nodes.push_back( wgs84_nodes[ tris_v[i][j] ] );
1134 bs_center = sgCalcCenter( group_nodes );
1135 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1139 // write group headers
1141 fprintf(fp, "# usemtl %s\n", material.c_str());
1142 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1143 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1146 for ( i = start; i < end; ++i ) {
1148 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1149 fprintf(fp, " %d/%d", tris_v[i][j], tris_tc[i][j] );
1159 // dump triangle groups
1160 if ( strips_v.size() > 0 ) {
1161 fprintf(fp, "# triangle strips\n");
1166 while ( start < (int)strip_materials.size() ) {
1168 material = strip_materials[start];
1169 while ( (end < (int)strip_materials.size()) &&
1170 (material == strip_materials[end]) )
1172 // cout << "end = " << end << endl;
1175 // cout << "group = " << start << " to " << end - 1 << endl;
1177 // make a list of points for the group
1178 point_list group_nodes;
1179 group_nodes.clear();
1181 double bs_radius = 0;
1182 for ( i = start; i < end; ++i ) {
1183 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1184 group_nodes.push_back( wgs84_nodes[ strips_v[i][j] ] );
1185 bs_center = sgCalcCenter( group_nodes );
1186 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1190 // write group headers
1192 fprintf(fp, "# usemtl %s\n", material.c_str());
1193 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1194 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1197 for ( i = start; i < end; ++i ) {
1199 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1200 fprintf(fp, " %d/%d", strips_v[i][j], strips_tc[i][j] );
1213 string command = "gzip --force --best " + file.str();
1214 system(command.c_str());