curt
7a65a990ba
time calculations for an alternate calendar time (i.e. if the application is being driven from an external source of data.) Fix a bug in sg_binobj.cxx which disrupted the 'broken down time' globally for the entire application.
1014 lines
28 KiB
C++
1014 lines
28 KiB
C++
// sg_binobj.cxx -- routines to read and write low level flightgear 3d objects
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//
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// Written by Curtis Olson, started January 2000.
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//
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// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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//
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#include <simgear/compiler.h>
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#include <stdio.h>
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#include <time.h>
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#include <vector>
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#include STL_STRING
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#include <simgear/bucket/newbucket.hxx>
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#include "lowlevel.hxx"
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#include "sg_binobj.hxx"
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SG_USING_STD( string );
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SG_USING_STD( vector );
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#if !defined (SG_HAVE_NATIVE_SGI_COMPILERS)
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SG_USING_STD( cout );
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SG_USING_STD( endl );
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#endif
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enum {
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SG_BOUNDING_SPHERE = 0,
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SG_VERTEX_LIST = 1,
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SG_NORMAL_LIST = 2,
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SG_TEXCOORD_LIST = 3,
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SG_TRIANGLE_FACES = 10,
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SG_TRIANGLE_STRIPS = 11,
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SG_TRIANGLE_FANS = 12
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} tgObjectTypes;
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enum {
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SG_MATERIAL = 0
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} tgPropertyTypes;
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class sgSimpleBuffer {
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private:
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char *ptr;
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unsigned int size;
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public:
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inline sgSimpleBuffer( unsigned int s )
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{
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size = 1;
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while ( size < s ) {
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size *= 2;
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}
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cout << "Creating a new buffer of size = " << size << endl;
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ptr = new char[size];
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}
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inline ~sgSimpleBuffer() {
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delete [] ptr;
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}
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inline unsigned int get_size() const { return size; }
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inline char *get_ptr() const { return ptr; }
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inline void resize( unsigned int s ) {
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if ( s > size ) {
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if ( ptr != NULL ) {
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delete [] ptr;
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}
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while ( size < s ) {
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size *= 2;
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}
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cout << "resizing buffer to size = " << size << endl;
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ptr = new char[size];
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}
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}
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};
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// calculate the center of a list of points, by taking the halfway
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// point between the min and max points.
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static Point3D calc_center( point_list& wgs84_nodes ) {
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Point3D p, min, max;
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if ( wgs84_nodes.size() ) {
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min = max = wgs84_nodes[0];
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} else {
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min = max = Point3D( 0 );
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}
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for ( int i = 0; i < (int)wgs84_nodes.size(); ++i ) {
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p = wgs84_nodes[i];
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if ( p.x() < min.x() ) { min.setx( p.x() ); }
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if ( p.y() < min.y() ) { min.sety( p.y() ); }
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if ( p.z() < min.z() ) { min.setz( p.z() ); }
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if ( p.x() > max.x() ) { max.setx( p.x() ); }
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if ( p.y() > max.y() ) { max.sety( p.y() ); }
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if ( p.z() > max.z() ) { max.setz( p.z() ); }
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}
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return ( min + max ) / 2.0;
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}
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// calculate the bounding sphere. Center is the center of the
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// tile and zero elevation
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double sgCalcBoundingRadius( Point3D center, point_list& wgs84_nodes ) {
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double dist_squared;
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double radius_squared = 0;
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for ( int i = 0; i < (int)wgs84_nodes.size(); ++i ) {
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dist_squared = center.distance3Dsquared( wgs84_nodes[i] );
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if ( dist_squared > radius_squared ) {
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radius_squared = dist_squared;
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}
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}
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return sqrt(radius_squared);
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}
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// read a binary file and populate the provided structures.
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bool SGBinObject::read_bin( const string& file ) {
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Point3D p;
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int i, j, k;
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char material[256];
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unsigned int nbytes;
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static sgSimpleBuffer buf( 32768 ); // 32 Kb
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// zero out structures
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gbs_center = Point3D( 0 );
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gbs_radius = 0.0;
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wgs84_nodes.clear();
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normals.clear();
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texcoords.clear();
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tris_v.clear();
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tris_tc.clear();
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tri_materials.clear();
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strips_v.clear();
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strips_tc.clear();
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strip_materials.clear();
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fans_v.clear();
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fans_tc.clear();
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fan_materials.clear();
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gzFile fp;
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if ( (fp = gzopen( file.c_str(), "rb" )) == NULL ) {
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string filegz = file + ".gz";
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if ( (fp = gzopen( filegz.c_str(), "rb" )) == NULL ) {
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// cout << "ERROR: opening " << file << " or " << filegz
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// << "for reading!" << endl;
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return false;
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}
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}
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sgClearReadError();
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// read headers
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unsigned int header;
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sgReadUInt( fp, &header );
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if ( ((header & 0xFF000000) >> 24) == 'S' &&
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((header & 0x00FF0000) >> 16) == 'G' ) {
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// cout << "Good header" << endl;
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// read file version
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version = (header & 0x0000FFFF);
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// cout << "File version = " << version << endl;
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} else {
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// close the file before we return
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gzclose(fp);
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return false;
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}
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// read creation time
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time_t calendar_time;
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sgReadLong( fp, &calendar_time );
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#if 0
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// The following code has a global effect on the host application
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// and can screws up the time elsewhere. It should be avoided
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// unless you need this for debugging in which case you should
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// disable it again once the debugging task is finished.
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struct tm *local_tm;
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local_tm = localtime( &calendar_time );
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char time_str[256];
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strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
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cout << "File created on " << time_str << endl;
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#endif
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// read number of top level objects
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short nobjects;
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sgReadShort( fp, &nobjects );
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// cout << "Total objects to read = " << nobjects << endl;
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// read in objects
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for ( i = 0; i < nobjects; ++i ) {
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// read object header
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char obj_type;
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short nproperties, nelements;
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sgReadChar( fp, &obj_type );
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sgReadShort( fp, &nproperties );
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sgReadShort( fp, &nelements );
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// cout << "object " << i << " = " << (int)obj_type << " props = "
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// << nproperties << " elements = " << nelements << endl;
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if ( obj_type == SG_BOUNDING_SPHERE ) {
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// read bounding sphere properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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}
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// read bounding sphere elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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double *dptr = (double *)ptr;
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (uint64 *)&(dptr[0]) );
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sgEndianSwap( (uint64 *)&(dptr[1]) );
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sgEndianSwap( (uint64 *)&(dptr[2]) );
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}
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gbs_center = Point3D( dptr[0], dptr[1], dptr[2] );
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// cout << "Center = " << gbs_center << endl;
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ptr += sizeof(double) * 3;
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float *fptr = (float *)ptr;
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (unsigned int *)fptr );
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}
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gbs_radius = fptr[0];
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// cout << "Bounding radius = " << gbs_radius << endl;
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}
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} else if ( obj_type == SG_VERTEX_LIST ) {
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// read vertex list properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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}
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// read vertex list elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / (sizeof(float) * 3);
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float *fptr = (float *)ptr;
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for ( k = 0; k < count; ++k ) {
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (unsigned int *)&(fptr[0]) );
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sgEndianSwap( (unsigned int *)&(fptr[1]) );
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sgEndianSwap( (unsigned int *)&(fptr[2]) );
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}
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p = Point3D( fptr[0], fptr[1], fptr[2] );
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// cout << "node = " << p << endl;
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wgs84_nodes.push_back( p );
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fptr += 3;
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}
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}
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} else if ( obj_type == SG_NORMAL_LIST ) {
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// read normal list properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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}
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// read normal list elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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unsigned char *ptr = (unsigned char *)(buf.get_ptr());
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / 3;
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for ( k = 0; k < count; ++k ) {
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sgdVec3 normal;
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sgdSetVec3( normal,
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(ptr[0]) / 127.5 - 1.0,
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(ptr[1]) / 127.5 - 1.0,
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(ptr[2]) / 127.5 - 1.0 );
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sgdNormalizeVec3( normal );
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p = Point3D( normal[0], normal[1], normal[2] );
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// cout << "normal = " << p << endl;
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normals.push_back( p );
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ptr += 3;
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}
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}
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} else if ( obj_type == SG_TEXCOORD_LIST ) {
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// read texcoord list properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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}
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// read texcoord list elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / (sizeof(float) * 2);
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float *fptr = (float *)ptr;
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for ( k = 0; k < count; ++k ) {
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (unsigned int *)&(fptr[0]) );
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sgEndianSwap( (unsigned int *)&(fptr[1]) );
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}
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p = Point3D( fptr[0], fptr[1], 0 );
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// cout << "texcoord = " << p << endl;
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texcoords.push_back( p );
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fptr += 2;
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}
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}
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} else if ( obj_type == SG_TRIANGLE_FACES ) {
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// read triangle face properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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if ( prop_type == SG_MATERIAL ) {
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strncpy( material, ptr, nbytes );
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material[nbytes] = '\0';
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// cout << "material type = " << material << endl;
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}
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}
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// read triangle face elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / (sizeof(short) * 2);
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short *sptr = (short *)ptr;
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int_list vs, tcs;
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vs.clear(); tcs.clear();
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for ( k = 0; k < count; ++k ) {
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (unsigned short *)&(sptr[0]) );
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sgEndianSwap( (unsigned short *)&(sptr[1]) );
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}
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vs.push_back( sptr[0] );
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tcs.push_back( sptr[1] );
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// cout << sptr[0] << "/" << sptr[1] << " ";
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sptr += 2;
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}
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// cout << endl;
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tris_v.push_back( vs );
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tris_tc.push_back( tcs );
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tri_materials.push_back( material );
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}
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} else if ( obj_type == SG_TRIANGLE_STRIPS ) {
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// read triangle strip properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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if ( prop_type == SG_MATERIAL ) {
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strncpy( material, ptr, nbytes );
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material[nbytes] = '\0';
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// cout << "material type = " << material << endl;
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}
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}
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// read triangle strip elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / (sizeof(short) * 2);
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short *sptr = (short *)ptr;
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int_list vs, tcs;
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vs.clear(); tcs.clear();
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for ( k = 0; k < count; ++k ) {
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if ( sgIsBigEndian() ) {
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sgEndianSwap( (unsigned short *)&(sptr[0]) );
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sgEndianSwap( (unsigned short *)&(sptr[1]) );
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}
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vs.push_back( sptr[0] );
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tcs.push_back( sptr[1] );
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// cout << sptr[0] << "/" << sptr[1] << " ";
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sptr += 2;
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}
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// cout << endl;
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strips_v.push_back( vs );
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strips_tc.push_back( tcs );
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strip_materials.push_back( material );
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}
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} else if ( obj_type == SG_TRIANGLE_FANS ) {
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// read triangle fan properties
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for ( j = 0; j < nproperties; ++j ) {
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char prop_type;
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sgReadChar( fp, &prop_type );
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sgReadUInt( fp, &nbytes );
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// cout << "property size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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if ( prop_type == SG_MATERIAL ) {
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strncpy( material, ptr, nbytes );
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material[nbytes] = '\0';
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// cout << "material type = " << material << endl;
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}
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}
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// read triangle fan elements
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for ( j = 0; j < nelements; ++j ) {
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sgReadUInt( fp, &nbytes );
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// cout << "element size = " << nbytes << endl;
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if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
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char *ptr = buf.get_ptr();
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sgReadBytes( fp, nbytes, ptr );
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int count = nbytes / (sizeof(short) * 2);
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short *sptr = (short *)ptr;
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int_list vs, tcs;
|
|
vs.clear(); tcs.clear();
|
|
for ( k = 0; k < count; ++k ) {
|
|
if ( sgIsBigEndian() ) {
|
|
sgEndianSwap( (unsigned short *)&(sptr[0]) );
|
|
sgEndianSwap( (unsigned short *)&(sptr[1]) );
|
|
}
|
|
vs.push_back( sptr[0] );
|
|
tcs.push_back( sptr[1] );
|
|
// cout << sptr[0] << "/" << sptr[1] << " ";
|
|
sptr += 2;
|
|
}
|
|
// cout << endl;
|
|
fans_v.push_back( vs );
|
|
fans_tc.push_back( tcs );
|
|
fan_materials.push_back( material );
|
|
}
|
|
} else {
|
|
// unknown object type, just skip
|
|
|
|
// read properties
|
|
for ( j = 0; j < nproperties; ++j ) {
|
|
char prop_type;
|
|
sgReadChar( fp, &prop_type );
|
|
|
|
sgReadUInt( fp, &nbytes );
|
|
// cout << "property size = " << nbytes << endl;
|
|
if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
|
|
char *ptr = buf.get_ptr();
|
|
sgReadBytes( fp, nbytes, ptr );
|
|
}
|
|
|
|
// read elements
|
|
for ( j = 0; j < nelements; ++j ) {
|
|
sgReadUInt( fp, &nbytes );
|
|
// cout << "element size = " << nbytes << endl;
|
|
if ( nbytes > buf.get_size() ) { buf.resize( nbytes ); }
|
|
char *ptr = buf.get_ptr();
|
|
sgReadBytes( fp, nbytes, ptr );
|
|
}
|
|
}
|
|
}
|
|
|
|
// close the file
|
|
gzclose(fp);
|
|
|
|
if ( sgReadError() ) {
|
|
cout << "We detected an error while reading the file." << endl;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// write out the structures to a binary file. We assume that the
|
|
// groups come to us sorted by material property. If not, things
|
|
// don't break, but the result won't be as optimal.
|
|
bool SGBinObject::write_bin( const string& base, const string& name,
|
|
const SGBucket& b )
|
|
{
|
|
Point3D p;
|
|
sgVec2 t;
|
|
sgVec3 pt;
|
|
int i, j;
|
|
|
|
string dir = base + "/" + b.gen_base_path();
|
|
string command = "mkdir -p " + dir;
|
|
#if defined(_MSC_VER) || defined(__MINGW32__)
|
|
system( (string("mkdir ") + dir).c_str() );
|
|
#else
|
|
system(command.c_str());
|
|
#endif
|
|
|
|
string file = dir + "/" + name + ".gz";
|
|
cout << "Output file = " << file << endl;
|
|
|
|
gzFile fp;
|
|
if ( (fp = gzopen( file.c_str(), "wb9" )) == NULL ) {
|
|
cout << "ERROR: opening " << file << " for writing!" << endl;
|
|
return false;
|
|
}
|
|
|
|
sgClearWriteError();
|
|
|
|
cout << "triangles size = " << tris_v.size() << " tri_materials = "
|
|
<< tri_materials.size() << endl;
|
|
cout << "strips size = " << strips_v.size() << " strip_materials = "
|
|
<< strip_materials.size() << endl;
|
|
cout << "fans size = " << fans_v.size() << " fan_materials = "
|
|
<< fan_materials.size() << endl;
|
|
|
|
cout << "points = " << wgs84_nodes.size() << endl;
|
|
cout << "tex coords = " << texcoords.size() << endl;
|
|
|
|
// write header magic
|
|
sgWriteUInt( fp, SG_FILE_MAGIC_NUMBER );
|
|
time_t calendar_time = time(NULL);
|
|
sgWriteLong( fp, (long int)calendar_time );
|
|
|
|
// calculate and write number of top level objects
|
|
string material;
|
|
int start;
|
|
int end;
|
|
short nobjects = 0;
|
|
nobjects++; // for gbs
|
|
nobjects++; // for vertices
|
|
nobjects++; // for normals
|
|
nobjects++; // for texcoords
|
|
|
|
// tris
|
|
short ntris = 0;
|
|
start = 0; end = 1;
|
|
while ( start < (int)tri_materials.size() ) {
|
|
material = tri_materials[start];
|
|
while ( (end < (int)tri_materials.size()) &&
|
|
(material == tri_materials[end]) ) {
|
|
end++;
|
|
}
|
|
ntris++;
|
|
start = end; end = start + 1;
|
|
}
|
|
nobjects += ntris;
|
|
|
|
// strips
|
|
short nstrips = 0;
|
|
start = 0; end = 1;
|
|
while ( start < (int)strip_materials.size() ) {
|
|
material = strip_materials[start];
|
|
while ( (end < (int)strip_materials.size()) &&
|
|
(material == strip_materials[end]) ) {
|
|
end++;
|
|
}
|
|
nstrips++;
|
|
start = end; end = start + 1;
|
|
}
|
|
nobjects += nstrips;
|
|
|
|
// fans
|
|
short nfans = 0;
|
|
start = 0; end = 1;
|
|
while ( start < (int)fan_materials.size() ) {
|
|
material = fan_materials[start];
|
|
while ( (end < (int)fan_materials.size()) &&
|
|
(material == fan_materials[end]) ) {
|
|
end++;
|
|
}
|
|
nfans++;
|
|
start = end; end = start + 1;
|
|
}
|
|
nobjects += nfans;
|
|
|
|
cout << "total top level objects = " << nobjects << endl;
|
|
sgWriteShort( fp, nobjects );
|
|
|
|
// write bounding sphere
|
|
sgWriteChar( fp, (char)SG_BOUNDING_SPHERE ); // type
|
|
sgWriteShort( fp, 0 ); // nproperties
|
|
sgWriteShort( fp, 1 ); // nelements
|
|
|
|
sgWriteUInt( fp, sizeof(double) * 3 + sizeof(float) ); // nbytes
|
|
sgdVec3 center;
|
|
sgdSetVec3( center, gbs_center.x(), gbs_center.y(), gbs_center.z() );
|
|
sgWritedVec3( fp, center );
|
|
sgWriteFloat( fp, gbs_radius );
|
|
|
|
// dump vertex list
|
|
sgWriteChar( fp, (char)SG_VERTEX_LIST ); // type
|
|
sgWriteShort( fp, 0 ); // nproperties
|
|
sgWriteShort( fp, 1 ); // nelements
|
|
sgWriteUInt( fp, wgs84_nodes.size() * sizeof(float) * 3 ); // nbytes
|
|
for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
|
|
p = wgs84_nodes[i] - gbs_center;
|
|
sgSetVec3( pt, p.x(), p.y(), p.z() );
|
|
sgWriteVec3( fp, pt );
|
|
}
|
|
|
|
// dump vertex normal list
|
|
sgWriteChar( fp, (char)SG_NORMAL_LIST ); // type
|
|
sgWriteShort( fp, 0 ); // nproperties
|
|
sgWriteShort( fp, 1 ); // nelements
|
|
sgWriteUInt( fp, normals.size() * 3 ); // nbytes
|
|
char normal[3];
|
|
for ( i = 0; i < (int)normals.size(); ++i ) {
|
|
p = normals[i];
|
|
normal[0] = (unsigned char)((p.x() + 1.0) * 127.5);
|
|
normal[1] = (unsigned char)((p.y() + 1.0) * 127.5);
|
|
normal[2] = (unsigned char)((p.z() + 1.0) * 127.5);
|
|
sgWriteBytes( fp, 3, normal );
|
|
}
|
|
|
|
// dump texture coordinates
|
|
sgWriteChar( fp, (char)SG_TEXCOORD_LIST ); // type
|
|
sgWriteShort( fp, 0 ); // nproperties
|
|
sgWriteShort( fp, 1 ); // nelements
|
|
sgWriteUInt( fp, texcoords.size() * sizeof(float) * 2 ); // nbytes
|
|
for ( i = 0; i < (int)texcoords.size(); ++i ) {
|
|
p = texcoords[i];
|
|
sgSetVec2( t, p.x(), p.y() );
|
|
sgWriteVec2( fp, t );
|
|
}
|
|
|
|
// dump individual triangles if they exist
|
|
if ( tris_v.size() > 0 ) {
|
|
int start = 0;
|
|
int end = 1;
|
|
string material;
|
|
while ( start < (int)tri_materials.size() ) {
|
|
// find next group
|
|
material = tri_materials[start];
|
|
while ( (end < (int)tri_materials.size()) &&
|
|
(material == tri_materials[end]) )
|
|
{
|
|
// cout << "end = " << end << endl;
|
|
end++;
|
|
}
|
|
// cout << "group = " << start << " to " << end - 1 << endl;
|
|
|
|
// write group headers
|
|
sgWriteChar( fp, (char)SG_TRIANGLE_FACES ); // type
|
|
sgWriteShort( fp, 1 ); // nproperties
|
|
sgWriteShort( fp, 1 ); // nelements
|
|
|
|
sgWriteChar( fp, (char)SG_MATERIAL ); // property
|
|
sgWriteUInt( fp, material.length() ); // nbytes
|
|
sgWriteBytes( fp, material.length(), material.c_str() );
|
|
|
|
sgWriteUInt( fp, (end - start) * 3 * 2 * sizeof(short) ); // nbytes
|
|
|
|
// write group
|
|
for ( i = start; i < end; ++i ) {
|
|
for ( j = 0; j < 3; ++j ) {
|
|
sgWriteShort( fp, (short)tris_v[i][j] );
|
|
sgWriteShort( fp, (short)tris_tc[i][j] );
|
|
}
|
|
}
|
|
|
|
start = end;
|
|
end = start + 1;
|
|
}
|
|
}
|
|
|
|
// dump triangle strips
|
|
if ( strips_v.size() > 0 ) {
|
|
int start = 0;
|
|
int end = 1;
|
|
string material;
|
|
while ( start < (int)strip_materials.size() ) {
|
|
// find next group
|
|
material = strip_materials[start];
|
|
while ( (end < (int)strip_materials.size()) &&
|
|
(material == strip_materials[end]) )
|
|
{
|
|
// cout << "end = " << end << endl;
|
|
end++;
|
|
}
|
|
// cout << "group = " << start << " to " << end - 1 << endl;
|
|
|
|
// write group headers
|
|
sgWriteChar( fp, (char)SG_TRIANGLE_STRIPS ); // type
|
|
sgWriteShort( fp, 1 ); // nproperties
|
|
sgWriteShort( fp, end - start ); // nelements
|
|
|
|
sgWriteChar( fp, (char)SG_MATERIAL ); // property
|
|
sgWriteUInt( fp, material.length() ); // nbytes
|
|
sgWriteBytes( fp, material.length(), material.c_str() );
|
|
|
|
// write strips
|
|
for ( i = start; i < end; ++i ) {
|
|
// nbytes
|
|
sgWriteUInt( fp, strips_v[i].size() * 2 * sizeof(short) );
|
|
for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
|
|
sgWriteShort( fp, (short)strips_v[i][j] );
|
|
sgWriteShort( fp, (short)strips_tc[i][j] );
|
|
}
|
|
}
|
|
|
|
start = end;
|
|
end = start + 1;
|
|
}
|
|
}
|
|
|
|
// dump triangle fans
|
|
if ( fans_v.size() > 0 ) {
|
|
int start = 0;
|
|
int end = 1;
|
|
string material;
|
|
while ( start < (int)fan_materials.size() ) {
|
|
// find next group
|
|
material = fan_materials[start];
|
|
while ( (end < (int)fan_materials.size()) &&
|
|
(material == fan_materials[end]) )
|
|
{
|
|
// cout << "end = " << end << endl;
|
|
end++;
|
|
}
|
|
// cout << "group = " << start << " to " << end - 1 << endl;
|
|
|
|
// write group headers
|
|
sgWriteChar( fp, (char)SG_TRIANGLE_FANS ); // type
|
|
sgWriteShort( fp, 1 ); // nproperties
|
|
sgWriteShort( fp, end - start ); // nelements
|
|
|
|
sgWriteChar( fp, (char)SG_MATERIAL ); // property
|
|
sgWriteUInt( fp, material.length() ); // nbytes
|
|
sgWriteBytes( fp, material.length(), material.c_str() );
|
|
|
|
// write fans
|
|
for ( i = start; i < end; ++i ) {
|
|
// nbytes
|
|
sgWriteUInt( fp, fans_v[i].size() * 2 * sizeof(short) );
|
|
for ( j = 0; j < (int)fans_v[i].size(); ++j ) {
|
|
sgWriteShort( fp, (short)fans_v[i][j] );
|
|
sgWriteShort( fp, (short)fans_tc[i][j] );
|
|
}
|
|
}
|
|
|
|
start = end;
|
|
end = start + 1;
|
|
}
|
|
}
|
|
|
|
// close the file
|
|
gzclose(fp);
|
|
|
|
if ( sgWriteError() ) {
|
|
cout << "We detected an error while writing the file." << endl;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// write out the structures to an ASCII file. We assume that the
|
|
// groups come to us sorted by material property. If not, things
|
|
// don't break, but the result won't be as optimal.
|
|
bool SGBinObject::write_ascii( const string& base, const string& name,
|
|
const SGBucket& b )
|
|
{
|
|
Point3D p;
|
|
int i, j;
|
|
|
|
string dir = base + "/" + b.gen_base_path();
|
|
string command = "mkdir -p " + dir;
|
|
#if defined(_MSC_VER) || defined(__MINGW32__)
|
|
system( (string("mkdir ") + dir).c_str() );
|
|
#else
|
|
system(command.c_str());
|
|
#endif
|
|
|
|
// string file = dir + "/" + b.gen_index_str();
|
|
string file = dir + "/" + name;
|
|
cout << "Output file = " << file << endl;
|
|
|
|
FILE *fp;
|
|
if ( (fp = fopen( file.c_str(), "w" )) == NULL ) {
|
|
cout << "ERROR: opening " << file << " for writing!" << endl;
|
|
return false;
|
|
}
|
|
|
|
cout << "triangles size = " << tris_v.size() << " tri_materials = "
|
|
<< tri_materials.size() << endl;
|
|
cout << "strips size = " << strips_v.size() << " strip_materials = "
|
|
<< strip_materials.size() << endl;
|
|
cout << "fans size = " << fans_v.size() << " fan_materials = "
|
|
<< fan_materials.size() << endl;
|
|
|
|
cout << "points = " << wgs84_nodes.size() << endl;
|
|
cout << "tex coords = " << texcoords.size() << endl;
|
|
// write headers
|
|
fprintf(fp, "# FGFS Scenery\n");
|
|
fprintf(fp, "# Version %s\n", SG_SCENERY_FILE_FORMAT);
|
|
|
|
time_t calendar_time = time(NULL);
|
|
struct tm *local_tm;
|
|
local_tm = localtime( &calendar_time );
|
|
char time_str[256];
|
|
strftime( time_str, 256, "%a %b %d %H:%M:%S %Z %Y", local_tm);
|
|
fprintf(fp, "# Created %s\n", time_str );
|
|
fprintf(fp, "\n");
|
|
|
|
// write bounding sphere
|
|
fprintf(fp, "# gbs %.5f %.5f %.5f %.2f\n",
|
|
gbs_center.x(), gbs_center.y(), gbs_center.z(), gbs_radius);
|
|
fprintf(fp, "\n");
|
|
|
|
// dump vertex list
|
|
fprintf(fp, "# vertex list\n");
|
|
for ( i = 0; i < (int)wgs84_nodes.size(); ++i ) {
|
|
p = wgs84_nodes[i] - gbs_center;
|
|
|
|
fprintf(fp, "v %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
|
|
}
|
|
fprintf(fp, "\n");
|
|
|
|
fprintf(fp, "# vertex normal list\n");
|
|
for ( i = 0; i < (int)normals.size(); ++i ) {
|
|
p = normals[i];
|
|
fprintf(fp, "vn %.5f %.5f %.5f\n", p.x(), p.y(), p.z() );
|
|
}
|
|
fprintf(fp, "\n");
|
|
|
|
// dump texture coordinates
|
|
fprintf(fp, "# texture coordinate list\n");
|
|
for ( i = 0; i < (int)texcoords.size(); ++i ) {
|
|
p = texcoords[i];
|
|
fprintf(fp, "vt %.5f %.5f\n", p.x(), p.y() );
|
|
}
|
|
fprintf(fp, "\n");
|
|
|
|
// dump individual triangles if they exist
|
|
if ( tris_v.size() > 0 ) {
|
|
fprintf(fp, "# triangle groups\n");
|
|
|
|
int start = 0;
|
|
int end = 1;
|
|
string material;
|
|
while ( start < (int)tri_materials.size() ) {
|
|
// find next group
|
|
material = tri_materials[start];
|
|
while ( (end < (int)tri_materials.size()) &&
|
|
(material == tri_materials[end]) )
|
|
{
|
|
// cout << "end = " << end << endl;
|
|
end++;
|
|
}
|
|
// cout << "group = " << start << " to " << end - 1 << endl;
|
|
|
|
// make a list of points for the group
|
|
point_list group_nodes;
|
|
group_nodes.clear();
|
|
Point3D bs_center;
|
|
double bs_radius = 0;
|
|
for ( i = start; i < end; ++i ) {
|
|
for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
|
|
group_nodes.push_back( wgs84_nodes[ tris_v[i][j] ] );
|
|
bs_center = calc_center( group_nodes );
|
|
bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
|
|
}
|
|
}
|
|
|
|
// write group headers
|
|
fprintf(fp, "\n");
|
|
fprintf(fp, "# usemtl %s\n", material.c_str());
|
|
fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
|
|
bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
|
|
|
|
// write groups
|
|
for ( i = start; i < end; ++i ) {
|
|
fprintf(fp, "f");
|
|
for ( j = 0; j < (int)tris_v[i].size(); ++j ) {
|
|
fprintf(fp, " %d/%d", tris_v[i][j], tris_tc[i][j] );
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|
|
|
|
start = end;
|
|
end = start + 1;
|
|
}
|
|
}
|
|
|
|
// dump triangle groups
|
|
if ( strips_v.size() > 0 ) {
|
|
fprintf(fp, "# triangle strips\n");
|
|
|
|
int start = 0;
|
|
int end = 1;
|
|
string material;
|
|
while ( start < (int)strip_materials.size() ) {
|
|
// find next group
|
|
material = strip_materials[start];
|
|
while ( (end < (int)strip_materials.size()) &&
|
|
(material == strip_materials[end]) )
|
|
{
|
|
// cout << "end = " << end << endl;
|
|
end++;
|
|
}
|
|
// cout << "group = " << start << " to " << end - 1 << endl;
|
|
|
|
// make a list of points for the group
|
|
point_list group_nodes;
|
|
group_nodes.clear();
|
|
Point3D bs_center;
|
|
double bs_radius = 0;
|
|
for ( i = start; i < end; ++i ) {
|
|
for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
|
|
group_nodes.push_back( wgs84_nodes[ strips_v[i][j] ] );
|
|
bs_center = calc_center( group_nodes );
|
|
bs_radius = sgCalcBoundingRadius( bs_center, group_nodes );
|
|
}
|
|
}
|
|
|
|
// write group headers
|
|
fprintf(fp, "\n");
|
|
fprintf(fp, "# usemtl %s\n", material.c_str());
|
|
fprintf(fp, "# bs %.4f %.4f %.4f %.2f\n",
|
|
bs_center.x(), bs_center.y(), bs_center.z(), bs_radius);
|
|
|
|
// write groups
|
|
for ( i = start; i < end; ++i ) {
|
|
fprintf(fp, "ts");
|
|
for ( j = 0; j < (int)strips_v[i].size(); ++j ) {
|
|
fprintf(fp, " %d/%d", strips_v[i][j], strips_tc[i][j] );
|
|
}
|
|
fprintf(fp, "\n");
|
|
}
|
|
|
|
start = end;
|
|
end = start + 1;
|
|
}
|
|
}
|
|
|
|
// close the file
|
|
fclose(fp);
|
|
|
|
command = "gzip --force --best " + file;
|
|
system(command.c_str());
|
|
|
|
return true;
|
|
}
|