DirectionS2< FT > Class Template Reference

#include <DirectionS2.h>

Public Member Functions
	DirectionS2 ()
	DirectionS2 (const VectorS2< FT > &v)
	DirectionS2 (const FT &x, const FT &y)
bool	operator== (const DirectionS2< FT > &d) const
bool	operator!= (const DirectionS2< FT > &d) const
bool	operator>= (const DirectionS2< FT > &d) const
bool	operator<= (const DirectionS2< FT > &d) const
bool	operator> (const DirectionS2< FT > &d) const
bool	operator< (const DirectionS2< FT > &d) const
bool	counterclockwise_in_between (const DirectionS2< FT > &d1, const DirectionS2< FT > &d2) const
VectorS2< FT >	vector () const
DirectionS2< FT >	perpendicular (const Orientation &o) const
DirectionS2< FT >	transform (const Aff_transformationS2< FT > &t) const
DirectionS2< FT >	operator- () const
FT	delta (int i) const
FT	dx () const
FT	dy () const

Public Attributes
FT	e0
FT	e1

Detailed Description

template<class FT>
class DirectionS2< FT >

Definition at line 59 of file DirectionS2.h.

Constructor & Destructor Documentation

CGAL_KERNEL_CTOR_INLINE DirectionS2

(

)

Definition at line 94 of file DirectionS2.h.

{}

CGAL_KERNEL_CTOR_INLINE DirectionS2

(

const VectorS2< FT > &

v

)

Definition at line 98 of file DirectionS2.h.

References VectorS2< FT >::e0, and VectorS2< FT >::e1.

{ e0 = v.e0; e1 = v.e1; }

CGAL_KERNEL_CTOR_INLINE DirectionS2	(	const FT &	x,
		const FT &	y
	)

Definition at line 103 of file DirectionS2.h.

References x, and y.

{ e0 = x; e1 = y; }

Member Function Documentation

CGAL_KERNEL_INLINE bool counterclockwise_in_between	(	const DirectionS2< FT > &	d1,
		const DirectionS2< FT > &	d2
	)		const

Definition at line 161 of file DirectionS2.h.

{
  if ( d1 < *this)
  {
      return ( *this < d2 )||( d2 <= d1 );
  }
  else
  {
      return ( *this < d2 )&&( d2 <= d1 );
  }
}

CGAL_KERNEL_INLINE FT delta

(

int

i

)

const

Definition at line 207 of file DirectionS2.h.

References CGAL_kernel_precondition, dx, and dy.

{
  CGAL_kernel_precondition( ( i == 0 ) || ( i == 1 ) );
  return (i==0) ? dx() : dy();
}

FT dx ( ) const

inline

Definition at line 217 of file DirectionS2.h.

Referenced by LineS2< FT >::LineS2(), DirectionS2< FT >::operator<(), and DirectionS2< FT >::operator==().

{ return e0; }

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FT dy ( ) const

inline

Definition at line 223 of file DirectionS2.h.

Referenced by LineS2< FT >::LineS2(), DirectionS2< FT >::operator<(), and DirectionS2< FT >::operator==().

{ return e1; }

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bool operator!= ( const DirectionS2< FT > &  d ) const

inline

Definition at line 119 of file DirectionS2.h.

References d.

{ return !( *this == d ); }

DirectionS2< FT > operator- ( ) const

inline

Definition at line 199 of file DirectionS2.h.

References dx, and dy.

{ return DirectionS2<FT>(-dx(), -dy()); }

CGAL_KERNEL_MEDIUM_INLINE bool operator<

(

const DirectionS2< FT > &

d

)

const

Definition at line 125 of file DirectionS2.h.

References dx, DirectionS2< FT >::dx(), dy, and DirectionS2< FT >::dy().

{
  int quadrant_this = (dx() >= FT(0)) ? ((dy() >= FT(0))?1:4)
                                      : ((dy() >= FT(0))?2:3);
  int quadrant_d    = (d.dx() >= FT(0)) ? ((d.dy() >= FT(0))?1:4)
                                        : ((d.dy() >= FT(0))?2:3);

  if(quadrant_this < quadrant_d)
    return true;
  else if (quadrant_this > quadrant_d)
    return false;
  else
    return dy() * d.dx() < d.dy() * dx();
}

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CGAL_KERNEL_INLINE bool operator<=

(

const DirectionS2< FT > &

d

)

const

Definition at line 155 of file DirectionS2.h.

{ return (*this < d) || (d == *this) ; }

bool operator==

(

const DirectionS2< FT > &

d

)

const

Definition at line 108 of file DirectionS2.h.

References CGAL_NTS, dx, DirectionS2< FT >::dx(), dy, DirectionS2< FT >::dy(), and sign().

{
// Use a S2 predicate for that ?
    return (CGAL_NTS sign(dx()) == CGAL_NTS sign(d.dx()))
        && (CGAL_NTS sign(dy()) == CGAL_NTS sign(d.dy()))
        && (dy()*d.dx() == d.dy()*dx());
}

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CGAL_KERNEL_INLINE bool operator>

(

const DirectionS2< FT > &

d

)

const

Definition at line 143 of file DirectionS2.h.

{ return d < *this ; }

CGAL_KERNEL_INLINE bool operator>=

(

const DirectionS2< FT > &

d

)

const

Definition at line 149 of file DirectionS2.h.

{ return (d < *this) || (d == *this) ; }

CGAL_KERNEL_MEDIUM_INLINE DirectionS2< FT > perpendicular

(

const Orientation &

o

)

const

Definition at line 183 of file DirectionS2.h.

References CGAL_kernel_precondition, COLLINEAR, COUNTERCLOCKWISE, dx, and dy.

{
  CGAL_kernel_precondition(o != COLLINEAR);
  if (o == COUNTERCLOCKWISE)
    return DirectionS2<FT>(-dy(), dx());
  else
    return DirectionS2<FT>(dy(), -dx());
}

CGAL_KERNEL_INLINE DirectionS2< FT > transform

(

const Aff_transformationS2< FT > &

t

)

const

Definition at line 194 of file DirectionS2.h.

References Aff_transformationS2< FT >::transform().

{ return t.transform(*this); }

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VectorS2< FT > vector ( ) const

inline

Definition at line 177 of file DirectionS2.h.

Referenced by RayS2< FT >::RayS2(), Rotation_repS2< FT >::Rotation_repS2(), Aff_transformation_repS2< FT >::transform(), and Rotation_repS2< FT >::transform().

{ return VectorS2<FT>(*this); }

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Member Data Documentation

FT e0

Definition at line 87 of file DirectionS2.h.

Referenced by VectorS2< FT >::hx(), VectorS2< FT >::VectorS2(), and VectorS2< FT >::x().

FT e1

Definition at line 88 of file DirectionS2.h.

Referenced by VectorS2< FT >::hy(), VectorS2< FT >::VectorS2(), and VectorS2< FT >::y().

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The documentation for this class was generated from the following file:

• DirectionS2.h