linerectangleclipper.h File Reference

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Classes
class	LineRectangleClipper< T >
	Clips a line between two points by a rectangle. The line may be completely outside, completely inside or partially inside. If partially inside, new endpoints are calculated. More...

Macros
#define	mBoundaryClip(delta, offset)
#define	mAdjustPoint(which)

Functions
template<class T >
void	clipPolyLine (const Geom::Rectangle< T > &rect, const TypeSet< Geom::Point2D< T > > &polyline, ObjectSet< TypeSet< Geom::Point2D< T > > > &result)

Macro Definition Documentation

#define mAdjustPoint

(

which

)

Value:

{ \
    Geom::Point2D<T> newpoint; \
    newpoint.x = start.x + castDouble2T( dx * t##which ); \
    newpoint.y = start.y + castDouble2T( dy * t##which ); \
    which##changed_ = which##_ != newpoint; \
    which##_ = newpoint; \
}

#define mBoundaryClip	(		delta,
			offset
	)

Value:

{ \
    if ( delta ) \
    { \
        double tnew = (double) (offset) / (delta); \
	if ( (delta) < 0 ) \
        { \
            if ( tnew > tstop )  return; \
            if ( tnew > tstart ) tstart = tnew; \
        } \
        else \
        { \
            if ( tnew < tstart ) return; \
            if ( tnew < tstop )  tstop = tnew; \
        } \
    } \
    else \
        if ( (offset) < 0 ) return; \
}

Function Documentation

template<class T >

void clipPolyLine ( const Geom::Rectangle< T > &  rect, const TypeSet< Geom::Point2D< T > > &  polyline, ObjectSet< TypeSet< Geom::Point2D< T > > > &  result  )

inline