qgar::WDSegment Class Reference
[Polygonal approximations]

#include <WDSegmentList.H>

Inheritance diagram for qgar::WDSegment:

List of all members.

Detailed Description

A segment resulting from a polygonal approximation performed according to Wall and Danielsson's method.

Todo:: Dirty: Take a look at functions qgar::WDSegmentList::set(), and conversions from WDSegments to Segments. Find a way to remove this class!

Author:: Karl Tombre

Date:: July 3, 2001 09:56

Since:: Qgar 1.0

Definition at line 86 of file WDSegmentList.H.

Public Types

typedef int value_type

Type of the source and target coordinates.

typedef value_type & reference

Reference to qgar::GenSegment::value_type.

typedef const value_type & const_reference

Constant reference to qgar::GenSegment::value_type.

typedef value_type * pointer

Pointer to qgar::GenSegment::value_type.

typedef const value_type * const_pointer

Constant pointer to qgar::GenSegment::value_type.

Public Member Functions

GenSegment ()

Default constructor.

GenSegment (const GenSegment< value_type > &aSeg)

Copy constructor.

GenSegment (const GenQgarSegment< value_type > &aQSeg)

Initialize from a Qgar segment.

GenSegment (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)

Initialize from source and target points.

GenSegment (const value_type aXSource, const value_type aYSource, const value_type aXTarget, const value_type aYTarget)

Initialize from coordinates.

virtual GenSegment< value_type > * clone () const

Return a deep copy of the surrent segment.

double sqr_length () const

Get squared length of the segment.

double rho () const

Distance between point (0,0) and its perpendicular projection onto the line supporting the segment.

double theta () const

Angle between the X axis and the segment, in [0,2PI[ radians.

double angle () const

Same as qgar::GenSegment::theta.

double slope () const

Angle between the X axis and the segment, in [0,PI[ radians.

double thetaDegrees () const

Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.

double angleDegrees () const

Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.

double slopeDegrees () const

Same as qgar::GenSegment::slope, but the result is given in [0,180[ degrees.

bool contains (const GenPoint< int > &c, double aDist=Math::epsilonD())

Return true if the given point approximately belongs to the current segment.

bool operator== (const GenSegment< value_type > &aSeg) const

Same as function qgar::GenSegment::eq.

bool operator!= (const GenSegment< value_type > &aSeg) const

Same as function qgar::GenSegment::notEq.

bool eq (const GenSegment< value_type > &aSeg) const

Equality.

bool notEq (const GenSegment< value_type > &aSeg) const

Inequality.

virtual void translate (value_type aTransX, value_type aTransY)

Translate current segment along X and Y axis.

virtual std::istream & read (std::istream &anInStream)

Deserializes the current segment from an input stream.

virtual std::ostream & write (std::ostream &anOutStream) const

Serializes the current segment to an input stream.

AbstractGenPrimitive ()

Default constructor.

AbstractGenPrimitive (const AbstractGenPrimitive< value_type > &aPrim)

Copy constructor.

AbstractGenPrimitive (const GenPoint< value_type > aSource, const GenPoint< value_type > aTarget)

Initialize from source and target.

AbstractGenPrimitive (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)

Initialize from coordinates.

const GenPoint< value_type > & accessSource () const

Get source point.

GenPoint< value_type > source () const

Get a copy of the source point.

const GenPoint< value_type > & accessTarget () const

Get target point.

GenPoint< value_type > target () const

Get a copy of the target point.

value_type xSource () const

Get X coordinate of the source point.

value_type xTarget () const

Get X coordinate of the target point.

value_type ySource () const

Get Y coordinate of the source point.

value_type yTarget () const

Get Y coordinate of the target point.

value_type dx () const

Difference between target and source X coordinates.

value_type dy () const

Difference between target and source Y coordinates.

void setSource (value_type aX, value_type aY)

Set source point.

void setSource (const GenPoint< value_type > &aPt)

Set source point.

void setTarget (value_type aX, value_type aY)

Set target point.

void setTarget (const GenPoint< value_type > &aPt)

Set target point.

void setSourceTarget (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)

Set both source and target points.

void setSourceTarget (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)

Set both source and target points.

void fixSource (value_type aX, value_type aY)

Set source point.

void fixSource (const GenPoint< value_type > &aPt)

Set source point.

void fixTarget (value_type aX, value_type aY)

Set target point.

void fixTarget (const GenPoint< value_type > &aPt)

Set target point.

void fixSourceTarget (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)

Set both source and target points.

void fixSourceTarget (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)

Set both source and target points.

void setXSource (value_type aX)

Set X coordinate of the source point.

void setXTarget (value_type aX)

Set X coordinate of the target point.

void setYSource (value_type aY)

Set Y coordinate of the source point.

void setYTarget (value_type aY)

Set Y coordinate of the target point.

void fixXSource (value_type aX)

Set X coordinate of the source point.

void fixXTarget (value_type aX)

Set X coordinate of the target point.

void fixYSource (value_type aY)

Set Y coordinate of the source point.

void fixYTarget (value_type aY)

Set Y coordinate of the target point.

Constructors

WDSegment ()

Default constructor: Creation of a null segment.

WDSegment (GenPoint< int > &orig, int deltaX, int deltaY, QGEdirection d)

Construct from full data (used during approximation).

WDSegment (const WDSegment &aSeg)

Copy constructor.

Access

int approxFactor () const

Get approximation factor.

int sqrLength () const

Get square length.

QGEdirection direction () const

Get general direction.

double length () const

Get length of segment.

Transformation

void setApproxFactor (int af)

Set approximation factor.

void setSqrLength (int sl)

Set square length.

void setDirection (QGEdirection d)

Set general direction.

void translateTarget (GenPoint< int > &)

Translate extremum point with given point.

void set (const WDSegment &aSeg)

Set segment from an other segment (member-to-member copy).

void set (GenPoint< int > &orig, int deltaX, int deltaY, QGEdirection d)

Operators

WDSegment & operator= (const WDSegment &w)

Assignment.

int operator== (const WDSegment s) const

Equality.

int operator!= (const WDSegment s) const

Inequality.

Protected Member Functions

virtual void updateSource ()

Update the geometrical structure when the source has been changed.

virtual void updateTarget ()

Update the geometrical structure when the target has been changed.

virtual void updateSourceTarget ()

Update the geometrical structure when both source and target have been changed.

Protected Attributes

GenPoint< value_type > _source

Source point.

GenPoint< value_type > _target

Target point.

Representation of a segment

int _sqrLength

Square length.

int _approxFactor

Approximation factor.

QGEdirection _direction

Direction of the segment.

Member Typedef Documentation

typedef const value_type* qgar::GenSegment< int >::const_pointer [inherited]

Constant pointer to qgar::GenSegment::value_type.

Reimplemented from qgar::AbstractGenPrimitive< int >.
Definition at line 170 of file _QGAR_GenSegment.H.

typedef const value_type& qgar::GenSegment< int >::const_reference [inherited]

Constant reference to qgar::GenSegment::value_type.

Reimplemented from qgar::AbstractGenPrimitive< int >.
Definition at line 160 of file _QGAR_GenSegment.H.

typedef value_type* qgar::GenSegment< int >::pointer [inherited]

Pointer to qgar::GenSegment::value_type.

Reimplemented from qgar::AbstractGenPrimitive< int >.
Definition at line 165 of file _QGAR_GenSegment.H.

typedef value_type& qgar::GenSegment< int >::reference [inherited]

Reference to qgar::GenSegment::value_type.

Reimplemented from qgar::AbstractGenPrimitive< int >.
Definition at line 155 of file _QGAR_GenSegment.H.

typedef int qgar::GenSegment< int >::value_type [inherited]

Type of the source and target coordinates.

Reimplemented from qgar::AbstractGenPrimitive< int >.
Definition at line 150 of file _QGAR_GenSegment.H.

Constructor & Destructor Documentation

qgar::WDSegment::WDSegment ( )

Default constructor: Creation of a null segment.

Definition at line 87 of file WDSegmentList.C.

qgar::WDSegment::WDSegment ( GenPoint< int > & orig,

int deltaX,

int deltaY,

QGEdirection d

)

Construct from full data (used during approximation).

Parameters:

orig origin point

deltaX displacement to end point ( $\Delta_x$ )

deltaY displacement to end point ( $\Delta_y$ )

d direction of segment

Definition at line 99 of file WDSegmentList.C.
References qgar::AbstractGenPrimitive< int >::_target, and qgar::GenPoint< T >::translate().

qgar::WDSegment::WDSegment ( const WDSegment & aSeg )

Copy constructor.

Definition at line 116 of file WDSegmentList.C.
References _approxFactor, _direction, qgar::AbstractGenPrimitive< T >::_source, qgar::AbstractGenPrimitive< int >::_source, _sqrLength, qgar::AbstractGenPrimitive< T >::_target, and qgar::AbstractGenPrimitive< int >::_target.

Member Function Documentation

qgar::AbstractGenPrimitive< int >::AbstractGenPrimitive ( value_type aXSource,

value_type aYSource,

value_type aXTarget,

value_type aYTarget

) [inherited]

Initialize from coordinates.

Parameters:

aXSource X coordinate of source point

aYSource Y coordinate of source point

aXTarget X coordinate of target point

aYTarget Y coordinate of target point

qgar::AbstractGenPrimitive< int >::AbstractGenPrimitive ( const GenPoint< value_type > aSource,

const GenPoint< value_type > aTarget

) [inherited]

Initialize from source and target.

Parameters:

aSource source point

aTarget target point

qgar::AbstractGenPrimitive< int >::AbstractGenPrimitive ( const AbstractGenPrimitive< value_type > & aPrim ) [inherited]

Copy constructor.

Parameters:

aPrim primitive to be copied

qgar::AbstractGenPrimitive< int >::AbstractGenPrimitive ( ) [inherited]

Default constructor.
Source and target at (0, 0).

const GenPoint<value_type>& qgar::AbstractGenPrimitive< int >::accessSource ( ) const [inline, inherited]

Get source point.

const GenPoint<value_type>& qgar::AbstractGenPrimitive< int >::accessTarget ( ) const [inline, inherited]

Get target point.

double qgar::GenSegment< int >::angle ( ) const [inline, inherited]

Same as qgar::GenSegment::theta.

double qgar::GenSegment< int >::angleDegrees ( ) const [inline, inherited]

Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.

int qgar::WDSegment::approxFactor ( ) const [inline]

Get approximation factor.

Definition at line 266 of file WDSegmentList.H.
References _approxFactor.
Referenced by qgar::WDSegmentList::PRIVATEperform().

virtual GenSegment<value_type>* qgar::GenSegment< int >::clone ( ) const [virtual, inherited]

Return a deep copy of the surrent segment.

Implements qgar::AbstractGenPrimitive< int >.

bool qgar::GenSegment< int >::contains ( const GenPoint< int > & c,

double aDist = Math::epsilonD()

) [inline, inherited]

Return true if the given point approximately belongs to the current segment.
Here, ''to belong'' means to be at a distance smaller or equal to the given threshold from somed point between the source and the target of the segment.

Parameters:

c a point

aDist threshold used to decide whether the given point belongs to the segment (default qgar::Math::epsilonD)

Todo:
Use values computed for 'r' to get the distance between the point and the segment, instead of using function qgar::qgDist, which computes again these values.

QGEdirection qgar::WDSegment::direction ( ) const [inline]

Get general direction.

Definition at line 284 of file WDSegmentList.H.
References _direction.
Referenced by qgar::WDSegmentList::PRIVATEperform().

value_type qgar::AbstractGenPrimitive< int >::dx ( ) const [inline, inherited]

Difference between target and source X coordinates.

value_type qgar::AbstractGenPrimitive< int >::dy ( ) const [inline, inherited]

Difference between target and source Y coordinates.

bool qgar::GenSegment< int >::eq ( const GenSegment< value_type > & aSeg ) const [inherited]

Equality.

Parameters:

aSeg a segment

Returns:
true if the current segment and the given segment have the same coordinates.

void qgar::AbstractGenPrimitive< int >::fixSource ( const GenPoint< value_type > & aPt ) [inherited]

Set source point.

Parameters:

aPt a point

Warning:
Function qgar::AbstractGenPrimitive::updateSource is called after the modification of the source point.

void qgar::AbstractGenPrimitive< int >::fixSource ( value_type aX,

value_type aY

) [inherited]

Set source point.

Parameters:

aX new X coordinate of the source point

aY new Y coordinate of the source point

Warning:
Function qgar::AbstractGenPrimitive::updateSource is called after the modification of the source point.

void qgar::AbstractGenPrimitive< int >::fixSourceTarget ( const GenPoint< value_type > & aSource,

const GenPoint< value_type > & aTarget

) [inherited]

Set both source and target points.

Parameters:

aSource source point

aTarget target point

Warning:
Function qgar::AbstractGenPrimitive::updateSourceTarget is called after the modification of the source and target points.

void qgar::AbstractGenPrimitive< int >::fixSourceTarget ( value_type aXSource,

value_type aYSource,

value_type aXTarget,

value_type aYTarget

) [inherited]

Set both source and target points.

Parameters:

aXSource new X coordinate of the source point

aYSource new Y coordinate of the source point

aXTarget new X coordinate of the target point

aYTarget new Y coordinate of the target point

Warning:
Function qgar::AbstractGenPrimitive::updateSourceTarget is called after the modification of the source and target points.

void qgar::AbstractGenPrimitive< int >::fixTarget ( const GenPoint< value_type > & aPt ) [inherited]

Set target point.

Parameters:

aPt a point

Warning:
Function qgar::AbstractGenPrimitive::updateTarget is called after the modification of the source target.

void qgar::AbstractGenPrimitive< int >::fixTarget ( value_type aX,

value_type aY

) [inherited]

Set target point.

Parameters:

aX new X coordinate of the target point

aY new Y coordinate of the target point

Warning:
Function qgar::AbstractGenPrimitive::updateTarget is called after the modification of the target point.

void qgar::AbstractGenPrimitive< int >::fixXSource ( value_type aX ) [inherited]

Set X coordinate of the source point.

Parameters:

aX new X coordinate of the source point

Warning:
Function qgar::AbstractGenPrimitive::updateSource is called after the modification of the source point.

void qgar::AbstractGenPrimitive< int >::fixXTarget ( value_type aX ) [inherited]

Set X coordinate of the target point.

Parameters:

aX new X coordinate of the target point

Warning:
Function qgar::AbstractGenPrimitive::updateTarget is called after the modification of the target point.

void qgar::AbstractGenPrimitive< int >::fixYSource ( value_type aY ) [inherited]

Set Y coordinate of the source point.

Parameters:

aY new Y coordinate of the source point

Warning:
Function qgar::AbstractGenPrimitive::updateSource is called after the modification of the source point.

void qgar::AbstractGenPrimitive< int >::fixYTarget ( value_type aY ) [inherited]

Set Y coordinate of the target point.

Parameters:

aY new Y coordinate of the target point

Warning:
Function qgar::AbstractGenPrimitive::updateTarget is called after the modification of the target point.

qgar::GenSegment< int >::GenSegment ( const value_type aXSource,

const value_type aYSource,

const value_type aXTarget,

const value_type aYTarget

) [inherited]

Initialize from coordinates.

Parameters:

aXSource X coordinate of the source point

aYSource Y coordinate of the source point

aXTarget X coordinate of the target point

aYTarget X coordinate of the target point

qgar::GenSegment< int >::GenSegment ( const GenPoint< value_type > & aSource,

const GenPoint< value_type > & aTarget

) [inherited]

Initialize from source and target points.

Parameters:

aSource source point

aTarget target point

qgar::GenSegment< int >::GenSegment ( const GenQgarSegment< value_type > & aQSeg ) [explicit, inherited]

Initialize from a Qgar segment.

Parameters:

aQSeg a Qgar segment

Warning:
This kind of conversion must be explicitely specified by the client.

qgar::GenSegment< int >::GenSegment ( const GenSegment< value_type > & aSeg ) [inherited]

Copy constructor.

qgar::GenSegment< int >::GenSegment ( ) [inherited]

Default constructor.
Zero-length segment located at the origin of the coordinate system.

Todo:
The created segment does not conform to the definition of a segment!

double qgar::WDSegment::length ( ) const [inline]

Get length of segment.

Reimplemented from qgar::GenSegment< int >.
Definition at line 293 of file WDSegmentList.H.
References _sqrLength.

bool qgar::GenSegment< int >::notEq ( const GenSegment< value_type > & aSeg ) const [inherited]

Inequality.

Parameters:

aSeg a segment

Returns:
true if the coordinates of the current and given segments are different.

bool qgar::GenSegment< int >::operator!= ( const GenSegment< value_type > & aSeg ) const [inline, inherited]

Same as function qgar::GenSegment::notEq.

int qgar::WDSegment::operator!= ( const WDSegment s ) const [inline]

Inequality.

Definition at line 348 of file WDSegmentList.H.

WDSegment & qgar::WDSegment::operator= ( const WDSegment & w )

Assignment.

Definition at line 192 of file WDSegmentList.C.
References _approxFactor, _direction, _sqrLength, qgar::AbstractGenPrimitive< int >::setSource(), qgar::AbstractGenPrimitive< int >::setTarget(), qgar::AbstractGenPrimitive< T >::source(), and qgar::AbstractGenPrimitive< T >::target().

bool qgar::GenSegment< int >::operator== ( const GenSegment< value_type > & aSeg ) const [inline, inherited]

Same as function qgar::GenSegment::eq.

int qgar::WDSegment::operator== ( const WDSegment s ) const [inline]

Equality.

Definition at line 339 of file WDSegmentList.H.

virtual std::istream& qgar::GenSegment< int >::read ( std::istream & anInStream ) [virtual, inherited]

Deserializes the current segment from an input stream.
A serialized segment is represented as:
Segment(<SOURCE>)(<TARGET>)

Parameters:

anInStream the input stream

See also:
qgar::qgReadObjName, qgar::qgReadObjData

Implements qgar::ISerializable.

double qgar::GenSegment< int >::rho ( ) const [inherited]

Distance between point (0,0) and its perpendicular projection onto the line supporting the segment.
Always positive.

void qgar::WDSegment::set ( GenPoint< int > & orig,

int deltaX,

int deltaY,

QGEdirection d

)

Set segment from given data.

Parameters:

orig origin point

deltaX displacement to end point ( $\Delta_{x}$ )

deltaY displacement to end point ( $\Delta_{y}$ )

d direction of segment

Definition at line 147 of file WDSegmentList.C.
References _approxFactor, _direction, qgar::AbstractGenPrimitive< int >::_source, _sqrLength, qgar::AbstractGenPrimitive< int >::_target, and qgar::GenPoint< T >::translate().

void qgar::WDSegment::set ( const WDSegment & aSeg )

Set segment from an other segment (member-to-member copy).

Definition at line 134 of file WDSegmentList.C.
References _approxFactor, _direction, qgar::AbstractGenPrimitive< T >::_source, qgar::AbstractGenPrimitive< int >::_source, _sqrLength, qgar::AbstractGenPrimitive< T >::_target, and qgar::AbstractGenPrimitive< int >::_target.
Referenced by qgar::WDSegmentList::PRIVATEperform().

void qgar::WDSegment::setApproxFactor ( int af ) [inline]

Set approximation factor.

Definition at line 307 of file WDSegmentList.H.
References _approxFactor.
Referenced by qgar::WDSegmentList::PRIVATEperform().

void qgar::WDSegment::setDirection ( QGEdirection d ) [inline]

Set general direction.

Definition at line 325 of file WDSegmentList.H.
References _direction.
Referenced by qgar::WDSegmentList::PRIVATEperform().

void qgar::AbstractGenPrimitive< int >::setSource ( const GenPoint< value_type > & aPt ) [inline, inherited]

Set source point.

Parameters:

aPt a point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setSource ( value_type aX,

value_type aY

) [inline, inherited]

Set source point.

Parameters:

aX new X coordinate of the source point

aY new Y coordinate of the source point

Warning:
The data structure of the primitive is not subsequently updated.

Referenced by operator=().

void qgar::AbstractGenPrimitive< int >::setSourceTarget ( const GenPoint< value_type > & aSource,

const GenPoint< value_type > & aTarget

) [inherited]

Set both source and target points.

Parameters:

aSource source point

aTarget target point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setSourceTarget ( value_type aXSource,

value_type aYSource,

value_type aXTarget,

value_type aYTarget

) [inherited]

Set both source and target points.

Parameters:

aXSource new X coordinate of the source point

aYSource new Y coordinate of the source point

aXTarget new X coordinate of the target point

aYTarget new Y coordinate of the target point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::WDSegment::setSqrLength ( int sl ) [inline]

Set square length.

Definition at line 316 of file WDSegmentList.H.
References _sqrLength.
Referenced by qgar::WDSegmentList::PRIVATEperform().

void qgar::AbstractGenPrimitive< int >::setTarget ( const GenPoint< value_type > & aPt ) [inline, inherited]

Set target point.

Parameters:

aPt a point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setTarget ( value_type aX,

value_type aY

) [inline, inherited]

Set target point.

Parameters:

aX new X coordinate of the target point

aY new Y coordinate of the target point

Warning:
The data structure of the primitive is not subsequently updated.

Referenced by operator=().

void qgar::AbstractGenPrimitive< int >::setXSource ( value_type aX ) [inline, inherited]

Set X coordinate of the source point.

Parameters:

aX new X coordinate of the source point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setXTarget ( value_type aX ) [inline, inherited]

Set X coordinate of the target point.

Parameters:

aX new X coordinate of the target point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setYSource ( value_type aY ) [inline, inherited]

Set Y coordinate of the source point.

Parameters:

aY new Y coordinate of the source point

Warning:
The data structure of the primitive is not subsequently updated.

void qgar::AbstractGenPrimitive< int >::setYTarget ( value_type aY ) [inline, inherited]

Set Y coordinate of the target point.

Parameters:

aY new Y coordinate of the target point

Warning:
The data structure of the primitive is not subsequently updated.

double qgar::GenSegment< int >::slope ( ) const [inline, inherited]

Angle between the X axis and the segment, in [0,PI[ radians.

O O +------------------> X +-----------------> X | \ | | \ | | \ <-' angle | \ <-' angle | \ | \ | + source | + target | \ | \ | \ | \ | \ | \ v + target v + source Y Y

Warning:
The current segment is not assimilited to a vector.

double qgar::GenSegment< int >::slopeDegrees ( ) const [inline, inherited]

Same as qgar::GenSegment::slope, but the result is given in [0,180[ degrees.

GenPoint<value_type> qgar::AbstractGenPrimitive< int >::source ( ) const [inline, inherited]

Get a copy of the source point.

double qgar::GenSegment< int >::sqr_length ( ) const [inherited]

Get squared length of the segment.

int qgar::WDSegment::sqrLength ( ) const [inline]

Get square length.

Definition at line 275 of file WDSegmentList.H.
References _sqrLength.
Referenced by qgar::WDSegmentList::PRIVATEperform().

GenPoint<value_type> qgar::AbstractGenPrimitive< int >::target ( ) const [inline, inherited]

Get a copy of the target point.

double qgar::GenSegment< int >::theta ( ) const [inline, inherited]

Angle between the X axis and the segment, in [0,2PI[ radians.

----->/ O O / / +------------------> X +---------|-------------> X | \ | | | / | | \ <-' angle | angle \_ /__/ | \ | / | + source | + target | \ | ^ | \ | / | v | / v + target v + source Y Y

Warning:
The current segment is assimilited to a vector joining its source to its target.

double qgar::GenSegment< int >::thetaDegrees ( ) const [inline, inherited]

Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.

virtual void qgar::GenSegment< int >::translate ( value_type aTransX,

value_type aTransY

) [virtual, inherited]

Translate current segment along X and Y axis.

Parameters:

aTransX X translation factor

aTransY Y translation factor

Implements qgar::AbstractGenPrimitive< int >.

void qgar::WDSegment::translateTarget ( GenPoint< int > & )

Translate extremum point with given point.

Definition at line 163 of file WDSegmentList.C.
References _direction, qgar::AbstractGenPrimitive< int >::_source, _sqrLength, qgar::AbstractGenPrimitive< int >::_target, qgar::QGE_DIRECTION_E, qgar::QGE_DIRECTION_N, qgar::QGE_DIRECTION_NE, qgar::QGE_DIRECTION_NW, qgar::QGE_DIRECTION_S, qgar::QGE_DIRECTION_SE, qgar::QGE_DIRECTION_W, qgar::GenPoint< T >::x(), and qgar::GenPoint< T >::y().
Referenced by qgar::WDSegmentList::PRIVATEperform().

virtual void qgar::GenSegment< int >::updateSource ( ) [protected, virtual, inherited]

Update the geometrical structure when the source has been changed.
Inherited from qgar::AbstractGenPrimitive.
Implements qgar::AbstractGenPrimitive< int >.

virtual void qgar::GenSegment< int >::updateSourceTarget ( ) [protected, virtual, inherited]

Update the geometrical structure when both source and target have been changed.

Implements qgar::AbstractGenPrimitive< int >.

virtual void qgar::GenSegment< int >::updateTarget ( ) [protected, virtual, inherited]

Update the geometrical structure when the target has been changed.

Implements qgar::AbstractGenPrimitive< int >.

virtual std::ostream& qgar::GenSegment< int >::write ( std::ostream & anOutStream ) const [virtual, inherited]

Serializes the current segment to an input stream.
A serialized segment is represented as:
Segment(<SOURCE>)(<TARGET>)

Parameters:

anOutStream the output stream

Implements qgar::ISerializable.

value_type qgar::AbstractGenPrimitive< int >::xSource ( ) const [inline, inherited]

Get X coordinate of the source point.

value_type qgar::AbstractGenPrimitive< int >::xTarget ( ) const [inline, inherited]

Get X coordinate of the target point.

value_type qgar::AbstractGenPrimitive< int >::ySource ( ) const [inline, inherited]

Get Y coordinate of the source point.

value_type qgar::AbstractGenPrimitive< int >::yTarget ( ) const [inline, inherited]

Get Y coordinate of the target point.

Member Data Documentation

int qgar::WDSegment::_approxFactor [protected]

Approximation factor.
In the Wall & Danielsson's method, it is a measure of the algebraic area between the segment and the approximated curve.
Definition at line 236 of file WDSegmentList.H.
Referenced by approxFactor(), operator=(), set(), setApproxFactor(), and WDSegment().

QGEdirection qgar::WDSegment::_direction [protected]

Direction of the segment.

Definition at line 241 of file WDSegmentList.H.
Referenced by direction(), operator=(), set(), setDirection(), translateTarget(), and WDSegment().

GenPoint<value_type> qgar::AbstractGenPrimitive< int >::_source [protected, inherited]

Source point.

Definition at line 615 of file _QGAR_AbstractGenPrimitive.H.
Referenced by set(), translateTarget(), and WDSegment().

int qgar::WDSegment::_sqrLength [protected]

Square length.

Definition at line 228 of file WDSegmentList.H.
Referenced by length(), operator=(), set(), setSqrLength(), sqrLength(), translateTarget(), and WDSegment().

GenPoint<value_type> qgar::AbstractGenPrimitive< int >::_target [protected, inherited]

Target point.

Definition at line 620 of file _QGAR_AbstractGenPrimitive.H.
Referenced by set(), translateTarget(), and WDSegment().

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


Public Types
typedef int	value_type
	Type of the source and target coordinates.
typedef value_type &	reference
	Reference to qgar::GenSegment::value_type.
typedef const value_type &	const_reference
	Constant reference to qgar::GenSegment::value_type.
typedef value_type *	pointer
	Pointer to qgar::GenSegment::value_type.
typedef const value_type *	const_pointer
	Constant pointer to qgar::GenSegment::value_type.
Public Member Functions
	GenSegment ()
	Default constructor.
	GenSegment (const GenSegment< value_type > &aSeg)
	Copy constructor.
	GenSegment (const GenQgarSegment< value_type > &aQSeg)
	Initialize from a Qgar segment.
	GenSegment (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)
	Initialize from source and target points.
	GenSegment (const value_type aXSource, const value_type aYSource, const value_type aXTarget, const value_type aYTarget)
	Initialize from coordinates.
virtual GenSegment< value_type > *	clone () const
	Return a deep copy of the surrent segment.
double	sqr_length () const
	Get squared length of the segment.
double	rho () const
	Distance between point (0,0) and its perpendicular projection onto the line supporting the segment.
double	theta () const
	Angle between the X axis and the segment, in [0,2PI[ radians.
double	angle () const
	Same as qgar::GenSegment::theta.
double	slope () const
	Angle between the X axis and the segment, in [0,PI[ radians.
double	thetaDegrees () const
	Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.
double	angleDegrees () const
	Same as qgar::GenSegment::theta, but the result is given in [0,360[ degrees.
double	slopeDegrees () const
	Same as qgar::GenSegment::slope, but the result is given in [0,180[ degrees.
bool	contains (const GenPoint< int > &c, double aDist=Math::epsilonD())
	Return true if the given point approximately belongs to the current segment.
bool	operator== (const GenSegment< value_type > &aSeg) const
	Same as function qgar::GenSegment::eq.
bool	operator!= (const GenSegment< value_type > &aSeg) const
	Same as function qgar::GenSegment::notEq.
bool	eq (const GenSegment< value_type > &aSeg) const
	Equality.
bool	notEq (const GenSegment< value_type > &aSeg) const
	Inequality.
virtual void	translate (value_type aTransX, value_type aTransY)
	Translate current segment along X and Y axis.
virtual std::istream &	read (std::istream &anInStream)
	Deserializes the current segment from an input stream.
virtual std::ostream &	write (std::ostream &anOutStream) const
	Serializes the current segment to an input stream.
	AbstractGenPrimitive ()
	Default constructor.
	AbstractGenPrimitive (const AbstractGenPrimitive< value_type > &aPrim)
	Copy constructor.
	AbstractGenPrimitive (const GenPoint< value_type > aSource, const GenPoint< value_type > aTarget)
	Initialize from source and target.
	AbstractGenPrimitive (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)
	Initialize from coordinates.
const GenPoint< value_type > &	accessSource () const
	Get source point.
GenPoint< value_type >	source () const
	Get a copy of the source point.
const GenPoint< value_type > &	accessTarget () const
	Get target point.
GenPoint< value_type >	target () const
	Get a copy of the target point.
value_type	xSource () const
	Get X coordinate of the source point.
value_type	xTarget () const
	Get X coordinate of the target point.
value_type	ySource () const
	Get Y coordinate of the source point.
value_type	yTarget () const
	Get Y coordinate of the target point.
value_type	dx () const
	Difference between target and source X coordinates.
value_type	dy () const
	Difference between target and source Y coordinates.
void	setSource (value_type aX, value_type aY)
	Set source point.
void	setSource (const GenPoint< value_type > &aPt)
	Set source point.
void	setTarget (value_type aX, value_type aY)
	Set target point.
void	setTarget (const GenPoint< value_type > &aPt)
	Set target point.
void	setSourceTarget (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)
	Set both source and target points.
void	setSourceTarget (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)
	Set both source and target points.
void	fixSource (value_type aX, value_type aY)
	Set source point.
void	fixSource (const GenPoint< value_type > &aPt)
	Set source point.
void	fixTarget (value_type aX, value_type aY)
	Set target point.
void	fixTarget (const GenPoint< value_type > &aPt)
	Set target point.
void	fixSourceTarget (value_type aXSource, value_type aYSource, value_type aXTarget, value_type aYTarget)
	Set both source and target points.
void	fixSourceTarget (const GenPoint< value_type > &aSource, const GenPoint< value_type > &aTarget)
	Set both source and target points.
void	setXSource (value_type aX)
	Set X coordinate of the source point.
void	setXTarget (value_type aX)
	Set X coordinate of the target point.
void	setYSource (value_type aY)
	Set Y coordinate of the source point.
void	setYTarget (value_type aY)
	Set Y coordinate of the target point.
void	fixXSource (value_type aX)
	Set X coordinate of the source point.
void	fixXTarget (value_type aX)
	Set X coordinate of the target point.
void	fixYSource (value_type aY)
	Set Y coordinate of the source point.
void	fixYTarget (value_type aY)
	Set Y coordinate of the target point.
Constructors
	WDSegment ()
	Default constructor: Creation of a null segment.
	WDSegment (GenPoint< int > &orig, int deltaX, int deltaY, QGEdirection d)
	Construct from full data (used during approximation).
	WDSegment (const WDSegment &aSeg)
	Copy constructor.
Access
int	approxFactor () const
	Get approximation factor.
int	sqrLength () const
	Get square length.
QGEdirection	direction () const
	Get general direction.
double	length () const
	Get length of segment.
Transformation
void	setApproxFactor (int af)
	Set approximation factor.
void	setSqrLength (int sl)
	Set square length.
void	setDirection (QGEdirection d)
	Set general direction.
void	translateTarget (GenPoint< int > &)
	Translate extremum point with given point.
void	set (const WDSegment &aSeg)
	Set segment from an other segment (member-to-member copy).
void	set (GenPoint< int > &orig, int deltaX, int deltaY, QGEdirection d)
Operators
WDSegment &	operator= (const WDSegment &w)
	Assignment.
int	operator== (const WDSegment s) const
	Equality.
int	operator!= (const WDSegment s) const
	Inequality.
Protected Member Functions
virtual void	updateSource ()
	Update the geometrical structure when the source has been changed.
virtual void	updateTarget ()
	Update the geometrical structure when the target has been changed.
virtual void	updateSourceTarget ()
	Update the geometrical structure when both source and target have been changed.
Protected Attributes
GenPoint< value_type >	_source
	Source point.
GenPoint< value_type >	_target
	Target point.
Representation of a segment
int	_sqrLength
	Square length.
int	_approxFactor
	Approximation factor.
QGEdirection	_direction
	Direction of the segment.

qgar::WDSegment Class Reference [Polygonal approximations]

Detailed Description

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

qgar::WDSegment Class Reference
[Polygonal approximations]