osmscout::LabelPath Class Reference

Helper for rendering labels following some path. More...

#include <LabelPath.h>

Public Member Functions
void	AddPoint (const Vertex2D &point)
double	AngleAtLength (double offset) const
double	AngleAtLengthDeg (double offset) const
double	GetLength () const
	LabelPath (double minSegmentLength=5)
Vertex2D	PointAtLength (double offset) const
bool	TestAngleVariance (double startOffset, double endOffset, double maximumAngle) const
	Test how squiggly is path in given offsets. More...
virtual	~LabelPath ()

Detailed Description

Helper for rendering labels following some path.

TODO: implement Bezier curves ?

Constructor & Destructor Documentation

LabelPath()

osmscout::LabelPath::LabelPath ( double  minSegmentLength = 5 )

explicit

~LabelPath()

osmscout::LabelPath::~LabelPath ( )

virtual

Member Function Documentation

AddPoint()

void osmscout::LabelPath::AddPoint

(

const Vertex2D &

point

)

References osmscout::Segment::angle, osmscout::Vertex2D::DistanceTo(), osmscout::Vertex2D::GetX(), osmscout::Vertex2D::GetY(), osmscout::Segment::length, and osmscout::Segment::start.

AngleAtLength()

double osmscout::LabelPath::AngleAtLength

(

double

offset

)

const

References osmscout::Segment::angle.

Referenced by AngleAtLengthDeg(), and osmscout::LabelLayouter< QGlyphRun, QTextLayout, MapPainterQt >::RegisterContourLabel().

AngleAtLengthDeg()

double osmscout::LabelPath::AngleAtLengthDeg

(

double

offset

)

const

References AngleAtLength().

Referenced by osmscout::LabelLayouter< QGlyphRun, QTextLayout, MapPainterQt >::RegisterContourLabel().

GetLength()

double osmscout::LabelPath::GetLength ( ) const

inline

Referenced by osmscout::LabelLayouter< QGlyphRun, QTextLayout, MapPainterQt >::RegisterContourLabel().

PointAtLength()

Vertex2D osmscout::LabelPath::PointAtLength

(

double

offset

)

const

References osmscout::Segment::angle, osmscout::Vertex2D::GetX(), osmscout::Vertex2D::GetY(), osmscout::Segment::offset, and osmscout::Segment::start.

Referenced by osmscout::LabelLayouter< QGlyphRun, QTextLayout, MapPainterQt >::RegisterContourLabel().

TestAngleVariance()

bool osmscout::LabelPath::TestAngleVariance	(	double	startOffset,
		double	endOffset,
		double	maximumAngle
	)		const

Test how squiggly is path in given offsets.

It return true if angle between first path segment (on startOffset) and any following (until endOffset) is lesser than required maximum.

Parameters

startOffset
endOffset
maximumAngle	in radians

Returns

true if angle between first and following segments (between given offsets) is lesser than maximumAngle

References osmscout::Segment::angle, osmscout::AngleDiff(), osmscout::Segment::length, and osmscout::Segment::offset.

Referenced by osmscout::LabelLayouter< QGlyphRun, QTextLayout, MapPainterQt >::RegisterContourLabel().

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

• LabelPath.h
• LabelPath.cpp