SMF_State.cpp

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#include "SMF_State.hpp"
#include <cstring>
#include <cstdlib>
 
// static inline int streq(const char *a,const char *b) { return std::strcmp(a,b)==0; }
 
namespace moab
{
 
SMF_State::SMF_State( const SMF_ivars& ivar, SMF_State* next )
{
 first_vertex = ivar.next_vertex;
 if( next )
 {
 vertex_correction = next->vertex_correction;
 xform = next->xform;
 }
 else
 {
 vertex_correction = 0;
 AffineXform identity;
 xform = identity;
 }
}
 
void SMF_State::vertex( double v[3] )
{
 xform.xform_point( v );
}
 
void SMF_State::normal( double nrm[3] )
{
 xform.xform_vector( nrm );
}
 
void SMF_State::face( int* verts, const SMF_ivars& ivar )
{
 for( int i = 0; i < 3; i++ )
 {
 if( verts[i] < 0 )
 verts[i] += ivar.next_vertex;
 else
 verts[i] += vertex_correction + ( first_vertex - 1 );
 }
}
 
void SMF_State::set_vertex_correction( int i )
{
 vertex_correction = i;
}
 
void SMF_State::mmult( const AffineXform& M )
{
 // initially, we tried this:
 // xform.accumulate(M);
 // maybe we should do M.accumulate(xform)
 AffineXform tmp = M;
 tmp.accumulate( xform );
 xform = tmp;
}
 
void SMF_State::mload( const AffineXform& M )
{
 xform = M;
}
 
} // namespace moab