#ifndef __glubackend_h_
#define __glubackend_h_
#include "trimvertex.h"
#include "gridvertex.h"
#include "gridtrimvertex.h"
class BasicCurveEvaluator;
class BasicSurfaceEvaluator;
class Backend {
private:
BasicCurveEvaluator& curveEvaluator;
BasicSurfaceEvaluator& surfaceEvaluator;
public:
Backend( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e )
: curveEvaluator(c), surfaceEvaluator(e) {}
void bgnsurf( int, int, long );
void patch( REAL, REAL, REAL, REAL );
void surfpts( long, REAL *, long, long, int, int,
REAL, REAL, REAL, REAL );
void surfbbox( long, REAL *, REAL * );
void surfgrid( REAL, REAL, long, REAL, REAL, long );
void surfmesh( long, long, long, long );
void bgntmesh( const char * );
void endtmesh( void );
void swaptmesh( void );
void tmeshvert( GridTrimVertex * );
void tmeshvert( TrimVertex * );
void tmeshvert( GridVertex * );
void tmeshvert( REAL u, REAL v );
void linevert( TrimVertex * );
void linevert( GridVertex * );
void bgnoutline( void );
void endoutline( void );
void endsurf( void );
void triangle( TrimVertex*, TrimVertex*, TrimVertex* );
void bgntfan();
void endtfan();
void bgnqstrip();
void endqstrip();
void evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
int n_lower, REAL v_lower, REAL* lower_val
);
void evalVStrip(int n_left, REAL u_left, REAL* left_val,
int n_right, REAL v_right, REAL* right_val
);
void tmeshvertNOGE(TrimVertex *t);
void tmeshvertNOGE_BU(TrimVertex *t);
void tmeshvertNOGE_BV(TrimVertex *t);
void preEvaluateBU(REAL u);
void preEvaluateBV(REAL v);
void bgncurv( void );
void segment( REAL, REAL );
void curvpts( long, REAL *, long, int, REAL, REAL );
void curvgrid( REAL, REAL, long );
void curvmesh( long, long );
void curvpt( REAL );
void bgnline( void );
void endline( void );
void endcurv( void );
private:
#ifndef NOWIREFRAME
int wireframetris;
int wireframequads;
int npts;
REAL mesh[3][4];
int meshindex;
#endif
};
#endif