SMF_State.cpp

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    1 #include "SMF_State.hpp"
    2 #include <cstring>
    3 #include <cstdlib>
    4  
    5 // static inline int streq(const char *a,const char *b) { return std::strcmp(a,b)==0; }
    6  
    7 namespace moab
    8 {
    9  
   10 SMF_State::SMF_State( const SMF_ivars& ivar, SMF_State* next )
   11 {
   12     first_vertex = ivar.next_vertex;
   13     if( next )
   14     {
   15         vertex_correction = next->vertex_correction;
   16         xform             = next->xform;
   17     }
   18     else
   19     {
   20         vertex_correction = 0;
   21         AffineXform identity;
   22         xform = identity;
   23     }
   24 }
   25  
   26 void SMF_State::vertex( double v[3] )
   27 {
   28     xform.xform_point( v );
   29 }
   30  
   31 void SMF_State::normal( double nrm[3] )
   32 {
   33     xform.xform_vector( nrm );
   34 }
   35  
   36 void SMF_State::face( int* verts, const SMF_ivars& ivar )
   37 {
   38     for( int i = 0; i < 3; i++ )
   39     {
   40         if( verts[i] < 0 )
   41             verts[i] += ivar.next_vertex;
   42         else
   43             verts[i] += vertex_correction + ( first_vertex - 1 );
   44     }
   45 }
   46  
   47 void SMF_State::set_vertex_correction( int i )
   48 {
   49     vertex_correction = i;
   50 }
   51  
   52 void SMF_State::mmult( const AffineXform& M )
   53 {
   54     // initially, we tried this:
   55     // xform.accumulate(M);
   56     // maybe we should do M.accumulate(xform)
   57     AffineXform tmp = M;
   58     tmp.accumulate( xform );
   59     xform = tmp;
   60 }
   61  
   62 void SMF_State::mload( const AffineXform& M )
   63 {
   64     xform = M;
   65 }
   66  
   67 }  // namespace moab