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>
40 #include "lowlevel.hxx"
41 #include "sg_binobj.hxx"
44 SG_USING_STD( string );
45 SG_USING_STD( vector );
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 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(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 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 *)&(dptr[0]) );
407 sgEndianSwap( (uint64 *)&(dptr[1]) );
408 sgEndianSwap( (uint64 *)&(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( (unsigned int *)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( (unsigned int *)&(fptr[0]) );
447 sgEndianSwap( (unsigned int *)&(fptr[1]) );
448 sgEndianSwap( (unsigned int *)&(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( (unsigned int *)&(fptr[0]) );
480 sgEndianSwap( (unsigned int *)&(fptr[1]) );
481 sgEndianSwap( (unsigned int *)&(fptr[2]) );
482 sgEndianSwap( (unsigned int *)&(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( (unsigned int *)&(fptr[0]) );
548 sgEndianSwap( (unsigned int *)&(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 string dir = base + "/" + b.gen_base_path();
624 string command = "mkdir -p " + dir;
625 #if defined(_MSC_VER) || defined(__MINGW32__)
626 system( (string("mkdir ") + dir).c_str() );
628 system(command.c_str());
631 string file = dir + "/" + name + ".gz";
632 cout << "Output file = " << file << endl;
635 if ( (fp = gzopen( file.c_str(), "wb9" )) == NULL ) {
636 cout << "ERROR: opening " << file << " for writing!" << endl;
642 cout << "points size = " << pts_v.size() << " pt_materials = "
643 << pt_materials.size() << endl;
644 cout << "triangles size = " << tris_v.size() << " tri_materials = "
645 << tri_materials.size() << endl;
646 cout << "strips size = " << strips_v.size() << " strip_materials = "
647 << strip_materials.size() << endl;
648 cout << "fans size = " << fans_v.size() << " fan_materials = "
649 << fan_materials.size() << endl;
651 cout << "nodes = " << wgs84_nodes.size() << endl;
652 cout << "colors = " << colors.size() << endl;
653 cout << "normals = " << normals.size() << endl;
654 cout << "tex coords = " << texcoords.size() << endl;
656 // write header magic
657 sgWriteUInt( fp, SG_FILE_MAGIC_NUMBER );
658 time_t calendar_time = time(NULL);
659 sgWriteLong( fp, (long int)calendar_time );
661 // calculate and write number of top level objects
666 nobjects++; // for gbs
667 nobjects++; // for vertices
668 nobjects++; // for colors
669 nobjects++; // for normals
670 nobjects++; // for texcoords
675 while ( start < (int)pt_materials.size() ) {
676 material = pt_materials[start];
677 while ( (end < (int)pt_materials.size()) &&
678 (material == pt_materials[end]) ) {
682 start = end; end = start + 1;
689 while ( start < (int)tri_materials.size() ) {
690 material = tri_materials[start];
691 while ( (end < (int)tri_materials.size()) &&
692 (material == tri_materials[end]) ) {
696 start = end; end = start + 1;
703 while ( start < (int)strip_materials.size() ) {
704 material = strip_materials[start];
705 while ( (end < (int)strip_materials.size()) &&
706 (material == strip_materials[end]) ) {
710 start = end; end = start + 1;
717 while ( start < (int)fan_materials.size() ) {
718 material = fan_materials[start];
719 while ( (end < (int)fan_materials.size()) &&
720 (material == fan_materials[end]) ) {
724 start = end; end = start + 1;
728 cout << "total top level objects = " << nobjects << endl;
729 sgWriteShort( fp, nobjects );
731 // write bounding sphere
732 sgWriteChar( fp, (char)SG_BOUNDING_SPHERE ); // type
733 sgWriteShort( fp, 0 ); // nproperties
734 sgWriteShort( fp, 1 ); // nelements
736 sgWriteUInt( fp, sizeof(double) * 3 + sizeof(float) ); // nbytes
738 sgdSetVec3( center, gbs_center.x(), gbs_center.y(), gbs_center.z() );
739 sgWritedVec3( fp, center );
740 sgWriteFloat( fp, gbs_radius );
743 sgWriteChar( fp, (char)SG_VERTEX_LIST ); // type
744 sgWriteShort( fp, 0 ); // nproperties
745 sgWriteShort( fp, 1 ); // nelements
746 sgWriteUInt( fp, wgs84_nodes.size() * sizeof(float) * 3 ); // nbytes
747 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
748 p = wgs84_nodes[i] - gbs_center;
749 sgSetVec3( pt, p.x(), p.y(), p.z() );
750 sgWriteVec3( fp, pt );
753 // dump vertex color list
754 sgWriteChar( fp, (char)SG_COLOR_LIST ); // type
755 sgWriteShort( fp, 0 ); // nproperties
756 sgWriteShort( fp, 1 ); // nelements
757 sgWriteUInt( fp, colors.size() * sizeof(float) * 4 ); // nbytes
758 for ( i = 0; i < (int)colors.size(); ++i ) {
760 // Right now we have a place holder for color alpha but we
761 // need to update the interface so the calling program can
763 sgSetVec4( color, p.x(), p.y(), p.z(), 1.0 );
764 sgWriteVec4( fp, color );
767 // dump vertex normal list
768 sgWriteChar( fp, (char)SG_NORMAL_LIST ); // type
769 sgWriteShort( fp, 0 ); // nproperties
770 sgWriteShort( fp, 1 ); // nelements
771 sgWriteUInt( fp, normals.size() * 3 ); // nbytes
773 for ( i = 0; i < (int)normals.size(); ++i ) {
775 normal[0] = (unsigned char)((p.x() + 1.0) * 127.5);
776 normal[1] = (unsigned char)((p.y() + 1.0) * 127.5);
777 normal[2] = (unsigned char)((p.z() + 1.0) * 127.5);
778 sgWriteBytes( fp, 3, normal );
781 // dump texture coordinates
782 sgWriteChar( fp, (char)SG_TEXCOORD_LIST ); // type
783 sgWriteShort( fp, 0 ); // nproperties
784 sgWriteShort( fp, 1 ); // nelements
785 sgWriteUInt( fp, texcoords.size() * sizeof(float) * 2 ); // nbytes
786 for ( i = 0; i < (int)texcoords.size(); ++i ) {
788 sgSetVec2( t, p.x(), p.y() );
789 sgWriteVec2( fp, t );
792 // dump point groups if they exist
793 if ( pts_v.size() > 0 ) {
797 while ( start < (int)pt_materials.size() ) {
799 material = pt_materials[start];
800 while ( (end < (int)pt_materials.size()) &&
801 (material == pt_materials[end]) )
803 // cout << "end = " << end << endl;
806 // cout << "group = " << start << " to " << end - 1 << endl;
808 // write group headers
809 sgWriteChar( fp, (char)SG_POINTS ); // type
810 sgWriteShort( fp, 2 ); // nproperties
811 sgWriteShort( fp, end - start ); // nelements
813 sgWriteChar( fp, (char)SG_MATERIAL ); // property
814 sgWriteUInt( fp, material.length() ); // nbytes
815 sgWriteBytes( fp, material.length(), material.c_str() );
819 if ( pts_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
820 if ( pts_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
821 if ( pts_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
822 if ( pts_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
823 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
824 sgWriteUInt( fp, 1 ); // nbytes
825 sgWriteChar( fp, idx_mask );
828 for ( i = start; i < end; ++i ) {
830 sgWriteUInt( fp, pts_v[i].size() * idx_size * sizeof(short) );
831 for ( j = 0; j < (int)pts_v[i].size(); ++j ) {
832 if ( pts_v.size() ) {
833 sgWriteShort( fp, (short)pts_v[i][j] );
835 if ( pts_n.size() ) {
836 sgWriteShort( fp, (short)pts_n[i][j] );
838 if ( pts_c.size() ) {
839 sgWriteShort( fp, (short)pts_c[i][j] );
841 if ( pts_tc.size() ) {
842 sgWriteShort( fp, (short)pts_tc[i][j] );
852 // dump individual triangles if they exist
853 if ( tris_v.size() > 0 ) {
857 while ( start < (int)tri_materials.size() ) {
859 material = tri_materials[start];
860 while ( (end < (int)tri_materials.size()) &&
861 (material == tri_materials[end]) )
863 // cout << "end = " << end << endl;
866 // cout << "group = " << start << " to " << end - 1 << endl;
868 // write group headers
869 sgWriteChar( fp, (char)SG_TRIANGLE_FACES ); // type
870 sgWriteShort( fp, 2 ); // nproperties
871 sgWriteShort( fp, 1 ); // nelements
873 sgWriteChar( fp, (char)SG_MATERIAL ); // property
874 sgWriteUInt( fp, material.length() ); // nbytes
875 sgWriteBytes( fp, material.length(), material.c_str() );
879 if ( tris_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
880 if ( tris_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
881 if ( tris_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
882 if ( tris_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
883 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
884 sgWriteUInt( fp, 1 ); // nbytes
885 sgWriteChar( fp, idx_mask );
888 sgWriteUInt( fp, (end - start) * 3 * idx_size * sizeof(short) );
891 for ( i = start; i < end; ++i ) {
892 for ( j = 0; j < 3; ++j ) {
893 if ( tris_v.size() ) {
894 sgWriteShort( fp, (short)tris_v[i][j] );
896 if ( tris_n.size() ) {
897 sgWriteShort( fp, (short)tris_n[i][j] );
899 if ( tris_c.size() ) {
900 sgWriteShort( fp, (short)tris_c[i][j] );
902 if ( tris_tc.size() ) {
903 sgWriteShort( fp, (short)tris_tc[i][j] );
913 // dump triangle strips
914 if ( strips_v.size() > 0 ) {
918 while ( start < (int)strip_materials.size() ) {
920 material = strip_materials[start];
921 while ( (end < (int)strip_materials.size()) &&
922 (material == strip_materials[end]) )
924 // cout << "end = " << end << endl;
927 // cout << "group = " << start << " to " << end - 1 << endl;
929 // write group headers
930 sgWriteChar( fp, (char)SG_TRIANGLE_STRIPS ); // type
931 sgWriteShort( fp, 2 ); // nproperties
932 sgWriteShort( fp, end - start ); // nelements
934 sgWriteChar( fp, (char)SG_MATERIAL ); // property
935 sgWriteUInt( fp, material.length() ); // nbytes
936 sgWriteBytes( fp, material.length(), material.c_str() );
940 if ( strips_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
941 if ( strips_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
942 if ( strips_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
943 if ( strips_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size;}
944 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
945 sgWriteUInt( fp, 1 ); // nbytes
946 sgWriteChar( fp, idx_mask );
949 for ( i = start; i < end; ++i ) {
951 sgWriteUInt( fp, strips_v[i].size() * idx_size * sizeof(short));
952 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
953 if ( strips_v.size() ) {
954 sgWriteShort( fp, (short)strips_v[i][j] );
956 if ( strips_n.size() ) {
957 sgWriteShort( fp, (short)strips_n[i][j] );
959 if ( strips_c.size() ) {
960 sgWriteShort( fp, (short)strips_c[i][j] );
962 if ( strips_tc.size() ) {
963 sgWriteShort( fp, (short)strips_tc[i][j] );
973 // dump triangle fans
974 if ( fans_v.size() > 0 ) {
978 while ( start < (int)fan_materials.size() ) {
980 material = fan_materials[start];
981 while ( (end < (int)fan_materials.size()) &&
982 (material == fan_materials[end]) )
984 // cout << "end = " << end << endl;
987 // cout << "group = " << start << " to " << end - 1 << endl;
989 // write group headers
990 sgWriteChar( fp, (char)SG_TRIANGLE_FANS ); // type
991 sgWriteShort( fp, 2 ); // nproperties
992 sgWriteShort( fp, end - start ); // nelements
994 sgWriteChar( fp, (char)SG_MATERIAL ); // property
995 sgWriteUInt( fp, material.length() ); // nbytes
996 sgWriteBytes( fp, material.length(), material.c_str() );
1000 if ( fans_v.size() ) { idx_mask |= SG_IDX_VERTICES; ++idx_size; }
1001 if ( fans_n.size() ) { idx_mask |= SG_IDX_NORMALS; ++idx_size; }
1002 if ( fans_c.size() ) { idx_mask |= SG_IDX_COLORS; ++idx_size; }
1003 if ( fans_tc.size() ) { idx_mask |= SG_IDX_TEXCOORDS; ++idx_size; }
1004 sgWriteChar( fp, (char)SG_INDEX_TYPES ); // property
1005 sgWriteUInt( fp, 1 ); // nbytes
1006 sgWriteChar( fp, idx_mask );
1009 for ( i = start; i < end; ++i ) {
1011 sgWriteUInt( fp, fans_v[i].size() * idx_size * sizeof(short) );
1012 for ( j = 0; j < (int)fans_v[i].size(); ++j ) {
1013 if ( fans_v.size() ) {
1014 sgWriteShort( fp, (short)fans_v[i][j] );
1016 if ( fans_n.size() ) {
1017 sgWriteShort( fp, (short)fans_n[i][j] );
1019 if ( fans_c.size() ) {
1020 sgWriteShort( fp, (short)fans_c[i][j] );
1022 if ( fans_tc.size() ) {
1023 sgWriteShort( fp, (short)fans_tc[i][j] );
1036 if ( sgWriteError() ) {
1037 cout << "We detected an error while writing the file." << endl;
1045 // write out the structures to an ASCII file. We assume that the
1046 // groups come to us sorted by material property. If not, things
1047 // don't break, but the result won't be as optimal.
1048 bool SGBinObject::write_ascii( const string& base, const string& name,
1054 string dir = base + "/" + b.gen_base_path();
1055 string command = "mkdir -p " + dir;
1056 #if defined(_MSC_VER) || defined(__MINGW32__)
1057 system( (string("mkdir ") + dir).c_str() );
1059 system(command.c_str());
1062 // string file = dir + "/" + b.gen_index_str();
1063 string file = dir + "/" + name;
1064 cout << "Output file = " << file << endl;
1067 if ( (fp = fopen( file.c_str(), "w" )) == NULL ) {
1068 cout << "ERROR: opening " << file << " for writing!" << endl;
1072 cout << "triangles size = " << tris_v.size() << " tri_materials = "
1073 << tri_materials.size() << endl;
1074 cout << "strips size = " << strips_v.size() << " strip_materials = "
1075 << strip_materials.size() << endl;
1076 cout << "fans size = " << fans_v.size() << " fan_materials = "
1077 << fan_materials.size() << endl;
1079 cout << "points = " << wgs84_nodes.size() << endl;
1080 cout << "tex coords = " << texcoords.size() << endl;
1082 fprintf(fp, "# FGFS Scenery\n");
1083 fprintf(fp, "# Version %s\n", SG_SCENERY_FILE_FORMAT);
1085 time_t calendar_time = time(NULL);
1086 struct tm *local_tm;
1087 local_tm = localtime( &calendar_time );
1089 strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
1090 fprintf(fp, "# Created %s\n", time_str );
1093 // write bounding sphere
1094 fprintf(fp, "# gbs %.5f %.5f %.5f %.2f\n",
1095 gbs_center.x(), gbs_center.y(), gbs_center.z(), gbs_radius);
1099 fprintf(fp, "# vertex list\n");
1100 for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
1101 p = wgs84_nodes[i] - gbs_center;
1103 fprintf(fp, "v %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1107 fprintf(fp, "# vertex normal list\n");
1108 for ( i = 0; i < (int)normals.size(); ++i ) {
1110 fprintf(fp, "vn %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
1114 // dump texture coordinates
1115 fprintf(fp, "# texture coordinate list\n");
1116 for ( i = 0; i < (int)texcoords.size(); ++i ) {
1118 fprintf(fp, "vt %.5f %.5f\n", p.x(), p.y() );
1122 // dump individual triangles if they exist
1123 if ( tris_v.size() > 0 ) {
1124 fprintf(fp, "# triangle groups\n");
1129 while ( start < (int)tri_materials.size() ) {
1131 material = tri_materials[start];
1132 while ( (end < (int)tri_materials.size()) &&
1133 (material == tri_materials[end]) )
1135 // cout << "end = " << end << endl;
1138 // cout << "group = " << start << " to " << end - 1 << endl;
1140 // make a list of points for the group
1141 point_list group_nodes;
1142 group_nodes.clear();
1144 double bs_radius = 0;
1145 for ( i = start; i < end; ++i ) {
1146 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1147 group_nodes.push_back( wgs84_nodes[ tris_v[i][j] ] );
1148 bs_center = sgCalcCenter( group_nodes );
1149 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1153 // write group headers
1155 fprintf(fp, "# usemtl %s\n", material.c_str());
1156 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1157 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1160 for ( i = start; i < end; ++i ) {
1162 for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
1163 fprintf(fp, " %d/%d", tris_v[i][j], tris_tc[i][j] );
1173 // dump triangle groups
1174 if ( strips_v.size() > 0 ) {
1175 fprintf(fp, "# triangle strips\n");
1180 while ( start < (int)strip_materials.size() ) {
1182 material = strip_materials[start];
1183 while ( (end < (int)strip_materials.size()) &&
1184 (material == strip_materials[end]) )
1186 // cout << "end = " << end << endl;
1189 // cout << "group = " << start << " to " << end - 1 << endl;
1191 // make a list of points for the group
1192 point_list group_nodes;
1193 group_nodes.clear();
1195 double bs_radius = 0;
1196 for ( i = start; i < end; ++i ) {
1197 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1198 group_nodes.push_back( wgs84_nodes[ strips_v[i][j] ] );
1199 bs_center = sgCalcCenter( group_nodes );
1200 bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
1204 // write group headers
1206 fprintf(fp, "# usemtl %s\n", material.c_str());
1207 fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
1208 bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
1211 for ( i = start; i < end; ++i ) {
1213 for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
1214 fprintf(fp, " %d/%d", strips_v[i][j], strips_tc[i][j] );
1227 command = "gzip --force --best " + file;
1228 system(command.c_str());