1 /* =======================================================================
2 * @author: Leonardo Florez-Valencia
3 * @email: florez-l@javeriana.edu.co
4 * =======================================================================
7 // Inclusion test taken from:
8 // https://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
10 #ifndef __ivq__ITK__RasterContourFilter__hxx__
11 #define __ivq__ITK__RasterContourFilter__hxx__
13 #include <itkImageRegionIteratorWithIndex.h>
14 #include <vtkPolygon.h>
16 // -------------------------------------------------------------------------
17 template< class _TImage >
18 void ivq::ITK::RasterContourFilter< _TImage >::
19 AddPoint( double x, double y )
24 this->m_Contour.push_back( pnt );
28 // -------------------------------------------------------------------------
29 template< class _TImage >
30 void ivq::ITK::RasterContourFilter< _TImage >::
31 AddPoint( double p[ 2 ] )
36 this->m_Contour.push_back( pnt );
40 // -------------------------------------------------------------------------
41 template< class _TImage >
42 void ivq::ITK::RasterContourFilter< _TImage >::
45 this->m_Contour.clear( );
49 // -------------------------------------------------------------------------
50 template< class _TImage >
51 ivq::ITK::RasterContourFilter< _TImage >::
52 RasterContourFilter( )
54 m_InsideValue( TPixel( 1 ) ),
55 m_OutsideValue( TPixel( 0 ) )
60 // -------------------------------------------------------------------------
61 template< class _TImage >
62 ivq::ITK::RasterContourFilter< _TImage >::
63 ~RasterContourFilter( )
67 // -------------------------------------------------------------------------
68 template< class _TImage >
69 void ivq::ITK::RasterContourFilter< _TImage >::
72 _TImage* out = this->GetOutput( 0 );
73 out->SetSpacing( this->m_Template->GetSpacing( ) );
74 out->SetRegions( this->m_Template->GetRequestedRegion( ) );
75 out->SetOrigin( this->m_Template->GetOrigin( ) );
76 out->SetDirection( this->m_Template->GetDirection( ) );
80 // -------------------------------------------------------------------------
81 template< class _TImage >
82 void ivq::ITK::RasterContourFilter< _TImage >::
83 BeforeThreadedGenerateData( )
85 // Keep just indices, not points
86 this->m_Polygon.clear( );
87 _TImage* out = this->GetOutput( 0 );
88 TIndex minIdx, maxIdx;
89 std::deque< TPoint >::const_iterator c = this->m_Contour.begin( );
90 for( ; c != this->m_Contour.end( ); ++c )
93 out->TransformPhysicalPointToIndex( *c, idx );
95 if( this->m_Polygon.size( ) > 0 )
97 if( this->m_Polygon.back( ) != idx )
99 this->m_Polygon.push_back( idx );
100 minIdx[ 0 ] = ( idx[ 0 ] < minIdx[ 0 ] )? idx[ 0 ]: minIdx[ 0 ];
101 minIdx[ 1 ] = ( idx[ 1 ] < minIdx[ 1 ] )? idx[ 1 ]: minIdx[ 1 ];
102 maxIdx[ 0 ] = ( idx[ 0 ] > maxIdx[ 0 ] )? idx[ 0 ]: maxIdx[ 0 ];
103 maxIdx[ 1 ] = ( idx[ 1 ] > maxIdx[ 1 ] )? idx[ 1 ]: maxIdx[ 1 ];
109 this->m_Polygon.push_back( idx );
110 minIdx = maxIdx = idx;
117 typename _TImage::SizeType size;
118 size[ 0 ] = maxIdx[ 0 ] - minIdx[ 0 ] + 1;
119 size[ 1 ] = maxIdx[ 1 ] - minIdx[ 1 ] + 1;
120 this->m_ROI.SetIndex( minIdx );
121 this->m_ROI.SetSize( size );
124 // -------------------------------------------------------------------------
125 template< class _TImage >
126 void ivq::ITK::RasterContourFilter< _TImage >::
127 AfterThreadedGenerateData( )
131 // -------------------------------------------------------------------------
132 template< class _TImage >
133 void ivq::ITK::RasterContourFilter< _TImage >::
134 ThreadedGenerateData( const TRegion& region, itk::ThreadIdType id )
136 long nVerts = this->m_Polygon.size( );
137 _TImage* out = this->GetOutput( );
138 itk::ImageRegionIteratorWithIndex< _TImage > iIt( out, region );
139 for( iIt.GoToBegin( ); !iIt.IsAtEnd( ); ++iIt )
141 TIndex p = iIt.GetIndex( );
143 if( this->m_ROI.IsInside( p ) )
146 for( i = 0, j = nVerts - 1; i < nVerts; j = i++ )
148 TIndex pi = this->m_Polygon[ i ];
149 TIndex pj = this->m_Polygon[ j ];
150 double pi0 = double( pi[ 0 ] );
151 double pi1 = double( pi[ 1 ] );
152 double pj0 = double( pj[ 0 ] );
153 double pj1 = double( pj[ 1 ] );
154 double p0 = double( p[ 0 ] );
155 double p1 = double( p[ 1 ] );
156 double ji0 = pj0 - pi0;
157 double ji1 = pj1 - pi1;
158 double i1 = p1 - pi1;
160 ( ( pi1 > p1 ) != ( pj1 > p1 ) ) &&
161 ( p0 < ( ( ji0 * i1 ) / ji1 ) + pi0 )
168 iIt.Set( ( inside )? this->m_InsideValue: this->m_OutsideValue );
173 #endif // __ivq__ITK__RasterContourFilter__hxx__