540 lines
13 KiB
C++
540 lines
13 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015 Cirilo Bernardo <cirilo.bernardo@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <iomanip>
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#include <iostream>
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#include <map>
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#include <sstream>
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#include <utility>
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#include <wx/log.h>
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#include "3d_cache/sg/sg_helpers.h"
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#include "3d_cache/sg/sg_node.h"
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// formats a floating point number for text output to a VRML file
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void S3D::FormatFloat( std::string& result, double value )
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{
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if( value < 1e-8 && value > -1e-8 )
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{
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result = "0";
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return;
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}
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// note: many VRML implementations use float so we use the max.
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// precision here of 8 digits.
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std::ostringstream out;
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out << std::setprecision( 8 ) << value;
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result = out.str();
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size_t p = result.find( "." );
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// trim trailing 0 if appropriate
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if( std::string::npos == p )
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return;
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p = result.find_first_of( "eE" );
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if( std::string::npos == p )
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{
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while( '0' == *(result.rbegin()) )
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result.erase( result.size() - 1 );
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return;
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}
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if( '0' != result.at( p -1 ) )
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return;
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// trim all 0 to the left of 'p'
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std::string tmp = result.substr( p );
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result = result.substr( 0, p );
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while( '0' == *(result.rbegin()) )
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result.erase( result.size() - 1 );
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result.append( tmp );
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return;
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}
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// format orientation data for VRML output
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void S3D::FormatOrientation( std::string& result, const SGVECTOR& axis, double rotation )
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{
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double aX;
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double aY;
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double aZ;
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axis.GetVector( aX, aY, aZ );
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FormatFloat( result, aX );
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std::string tmp;
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FormatFloat( tmp, aY );
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result.append( " " );
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result.append( tmp );
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FormatFloat( tmp, aZ );
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result.append( " " );
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result.append( tmp );
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FormatFloat( tmp, rotation );
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result.append( " " );
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result.append( tmp );
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return;
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}
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// format point data for VRML output
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void S3D::FormatPoint( std::string& result, const SGPOINT& point )
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{
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FormatFloat( result, point.x );
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std::string tmp;
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FormatFloat( tmp, point.y );
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result.append( " " );
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result.append( tmp );
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FormatFloat( tmp, point.z );
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result.append( " " );
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result.append( tmp );
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return;
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}
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// format vector data for VRML output
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void S3D::FormatVector( std::string& result, const SGVECTOR& aVector )
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{
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double X, Y, Z;
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aVector.GetVector( X, Y, Z );
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FormatFloat( result, X );
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std::string tmp;
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FormatFloat( tmp, Y );
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result.append( " " );
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result.append( tmp );
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FormatFloat( tmp, Z );
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result.append( " " );
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result.append( tmp );
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return;
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}
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// format Color data for VRML output
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void S3D::FormatColor( std::string& result, const SGCOLOR& aColor )
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{
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float R, G, B;
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aColor.GetColor( R, G, B );
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FormatFloat( result, R );
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std::string tmp;
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FormatFloat( tmp, G );
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result.append( " " );
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result.append( tmp );
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FormatFloat( tmp, B );
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result.append( " " );
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result.append( tmp );
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return;
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}
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bool S3D::WritePoint( std::ofstream& aFile, const SGPOINT& aPoint )
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{
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aFile.write( (char*)&aPoint.x, sizeof(aPoint.x) );
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aFile.write( (char*)&aPoint.y, sizeof(aPoint.y) );
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aFile.write( (char*)&aPoint.z, sizeof(aPoint.z) );
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if( aFile.fail() )
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return false;
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return true;
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}
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bool S3D::WriteVector( std::ofstream& aFile, const SGVECTOR& aVector )
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{
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double x, y, z;
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aVector.GetVector( x, y, z );
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aFile.write( (char*)&x, sizeof(double) );
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aFile.write( (char*)&y, sizeof(double) );
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aFile.write( (char*)&z, sizeof(double) );
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if( aFile.fail() )
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return false;
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return true;
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}
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bool S3D::WriteColor( std::ofstream& aFile, const SGCOLOR& aColor )
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{
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float r, g, b;
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aColor.GetColor( r, g, b );
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aFile.write( (char*)&r, sizeof(float) );
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aFile.write( (char*)&g, sizeof(float) );
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aFile.write( (char*)&b, sizeof(float) );
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if( aFile.fail() )
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return false;
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return true;
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}
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S3D::SGTYPES S3D::ReadTag( std::ifstream& aFile, std::string& aName )
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{
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char schar;
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aFile.get( schar );
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if( '[' != schar )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] corrupt data; missing left bracket at position ";
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ostr << aFile.tellg();
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return S3D::SGTYPE_END;
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}
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std::string name;
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aFile.get( schar );
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while( ']' != schar && aFile.good() )
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{
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name.push_back( schar );
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aFile.get( schar );
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}
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if( schar != ']' )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] corrupt data; could not find right bracket";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return S3D::SGTYPE_END;
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}
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aName = name;
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size_t upos = name.find( '_' );
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if( std::string::npos == upos )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] corrupt data; no underscore in name '";
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ostr << name << "'";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return S3D::SGTYPE_END;
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}
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name = name.substr( 0, upos );
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S3D::SGTYPES types[S3D::SGTYPE_END] = {
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SGTYPE_TRANSFORM,
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SGTYPE_APPEARANCE,
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SGTYPE_COLORS,
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SGTYPE_COLORINDEX,
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SGTYPE_FACESET,
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SGTYPE_COORDS,
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SGTYPE_COORDINDEX,
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SGTYPE_NORMALS,
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SGTYPE_SHAPE
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};
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for( int i = 0; i < S3D::SGTYPE_END; ++i )
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{
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if( !name.compare( S3D::GetNodeTypeName( types[i] ) ) )
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return types[i];
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}
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#ifdef DEBUG
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do {
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] corrupt data; no node type matching '";
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ostr << name << "'";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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} while( 0 );
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#endif
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return S3D::SGTYPE_END;
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}
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bool S3D::ReadPoint( std::ifstream& aFile, SGPOINT& aPoint )
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{
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aFile.read( (char*)&aPoint.x, sizeof( aPoint.x ) );
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aFile.read( (char*)&aPoint.y, sizeof( aPoint.y ) );
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aFile.read( (char*)&aPoint.z, sizeof( aPoint.z ) );
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if( aFile.fail() )
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return false;
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return true;
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}
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bool S3D::ReadVector( std::ifstream& aFile, SGVECTOR& aVector )
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{
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double x, y, z;
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aFile.read( (char*)&x, sizeof(double) );
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aFile.read( (char*)&y, sizeof(double) );
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aFile.read( (char*)&z, sizeof(double) );
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aVector.SetVector( x, y, z );
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if( aFile.fail() )
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return false;
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return true;
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}
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bool S3D::ReadColor( std::ifstream& aFile, SGCOLOR& aColor )
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{
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float r, g, b;
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aFile.read( (char*)&r, sizeof(float) );
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aFile.read( (char*)&g, sizeof(float) );
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aFile.read( (char*)&b, sizeof(float) );
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aColor.SetColor( r, g, b );
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if( aFile.fail() )
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return false;
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return true;
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}
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bool S3D::degenerate( glm::dvec3* pts )
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{
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double dx, dy, dz;
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dx = pts[1].x - pts[0].x;
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dy = pts[1].y - pts[0].y;
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dz = pts[1].z - pts[0].z;
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if( ( dx*dx + dy*dy + dz*dz ) < 1e-15 )
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return true;
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dx = pts[2].x - pts[0].x;
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dy = pts[2].y - pts[0].y;
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dz = pts[2].z - pts[0].z;
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if( ( dx*dx + dy*dy + dz*dz ) < 1e-15 )
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return true;
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dx = pts[2].x - pts[1].x;
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dy = pts[2].y - pts[1].y;
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dz = pts[2].z - pts[1].z;
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if( ( dx*dx + dy*dy + dz*dz ) < 1e-15 )
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return true;
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return false;
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};
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static void calcTriad( glm::dvec3* pts, glm::dvec3& tri )
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{
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if( S3D::degenerate( pts ) )
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{
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// degenerate points should contribute nothing to the result
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tri = glm::dvec3( 0.0, 0.0, 0.0 );
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return;
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}
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// normal * 2 * area
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tri = glm::cross( pts[1] - pts[0], pts[2] - pts[0] );
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return;
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}
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bool S3D::CalcTriangleNormals( std::vector< SGPOINT > coords,
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std::vector< int >& index, std::vector< SGVECTOR >& norms )
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{
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size_t vsize = coords.size();
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if( vsize < 3 )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] invalid vertex set (fewer than 3 vertices)";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return false;
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}
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size_t isize = index.size();
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if( 0 != isize % 3 || index.empty() )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] invalid index set (not multiple of 3)";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return false;
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}
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if( !norms.empty() )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] normals set is not empty";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return false;
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}
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std::map< int, std::list< glm::dvec3 > >vmap;
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int p1, p2, p3;
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// create the map of indices to facet sets
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for( size_t i = 0; i < isize; )
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{
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p1 = index[i++];
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p2 = index[i++];
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p3 = index[i++];
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if( p1 < 0 || p1 >= (int)vsize || p2 < 0 || p2 >= (int)vsize ||
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p3 < 0 || p3 >= (int)vsize )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [INFO] invalid index set; index out of bounds";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return false;
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}
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glm::dvec3 tri;
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glm::dvec3 trip[3];
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trip[0] = glm::dvec3( coords[p1].x, coords[p1].y, coords[p1].z );
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trip[1] = glm::dvec3( coords[p2].x, coords[p2].y, coords[p2].z );
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trip[2] = glm::dvec3( coords[p3].x, coords[p3].y, coords[p3].z );
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calcTriad( trip, tri );
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std::map< int, std::list< glm::dvec3 > >::iterator ip = vmap.find( p1 );
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if( ip != vmap.end() )
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{
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ip->second.push_back( tri );
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}
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else
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{
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vmap.insert( std::pair < int, std::list < glm::dvec3 > >
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( p1, std::list < glm::dvec3 >( 1, tri ) ) );
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}
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ip = vmap.find( p2 );
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if( ip != vmap.end() )
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{
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ip->second.push_back( tri );
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}
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else
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{
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vmap.insert( std::pair < int, std::list < glm::dvec3 > >
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( p2, std::list < glm::dvec3 >( 1, tri ) ) );
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}
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ip = vmap.find( p3 );
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if( ip != vmap.end() )
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{
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ip->second.push_back( tri );
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}
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else
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{
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vmap.insert( std::pair < int, std::list < glm::dvec3 > >
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( p3, std::list < glm::dvec3 >( 1, tri ) ) );
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}
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}
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std::map< int, std::list< glm::dvec3 > >::iterator sM = vmap.begin();
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std::map< int, std::list< glm::dvec3 > >::iterator eM = vmap.end();
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size_t idx = 0;
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while( sM != eM )
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{
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size_t item = sM->first;
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// assign any skipped coordinates a normal of (0,0,1)
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while( item > idx )
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{
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norms.push_back( SGVECTOR( 0, 0, 1 ) );
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++idx;
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}
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std::list< glm::dvec3 >::iterator sT = sM->second.begin();
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std::list< glm::dvec3 >::iterator eT = sM->second.end();
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glm::dvec3 norm( 0.0, 0.0, 0.0 );
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while( sT != eT )
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{
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norm += *sT;
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++sT;
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}
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norms.push_back( SGVECTOR( norm.x, norm.y, norm.z ) );
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++idx;
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++sM;
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}
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if( norms.size() != coords.size() )
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{
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#ifdef DEBUG
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std::ostringstream ostr;
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ostr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
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ostr << " * [BUG] number of normals does not equal number of vertices";
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wxLogTrace( MASK_3D_SG, "%s\n", ostr.str().c_str() );
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#endif
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return false;
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}
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return true;
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}
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