Buffer structure for Vertex2D data. More...

#include <Transformation.h>

Public Member Functions
	CoordBuffer ()=default

	CoordBuffer (const CoordBuffer &other)=delete

CoordBufferRange	GenerateParallelWay (const CoordBufferRange &org, double offset)
	Generate parallel way to way stored in this buffer on range orgStart, orgEnd (inclusive) Result is stored after the last valid point. More...

CoordBuffer &	operator= (const CoordBuffer &other)=delete

size_t	PushCoord (const Vertex2D &coord)
	Push coordinate to the buffer. More...

void	Reset ()

	~CoordBuffer ()

Public Attributes
Vertex2D *	buffer {new Vertex2D[bufferSize]()}

Static Public Attributes
static CoordBuffer	emptyCoordBuffer

Detailed Description

Buffer structure for Vertex2D data.

You can add coordinates to the buffer and get the position of the coordinate in the buffer in return.

The CoordBuffer automatically resizes by a factor of 2 if its is too small to hold the additional data. The initial size of the buffer should be able to hold "enough" data. If you thus get reallocation log warnings this is not an error, but if it happens too often you are either not reusing CoordBuffer instances as much as possible or are pushing more geometric data than we expect to be sensible for mobile or desktop rendering. Check your allocation strategy for MapPainter instances or style sheet in this case,

CoordBuffer also allows also higher level operations on the buffer to generate copies of stored objects.

Constructor & Destructor Documentation

◆ CoordBuffer() [1/2]

osmscout::CoordBuffer::CoordBuffer ( )

default

◆ ~CoordBuffer()

osmscout::CoordBuffer::~CoordBuffer ( )

References buffer.

◆ CoordBuffer() [2/2]

osmscout::CoordBuffer::CoordBuffer ( const CoordBuffer & other )

delete

Member Function Documentation

◆ GenerateParallelWay()

CoordBufferRange osmscout::CoordBuffer::GenerateParallelWay	(	const CoordBufferRange &	org,
		double	offset
	)

Generate parallel way to way stored in this buffer on range orgStart, orgEnd (inclusive) Result is stored after the last valid point.

Generated way offsets are returned in start and end.

Way have to have at least two nodes (orgEnd > orgStart)

Parameters

org	original range of data in the CoordBuffer
offset	offset of parallel way - positive offset is left, negative right

Returns: range of data in the CoordBuffer

References buffer, osmscout::Det(), osmscout::CoordBufferRange::GetEnd(), osmscout::CoordBufferRange::GetStart(), osmscout::Vertex2D::GetX(), osmscout::Vertex2D::GetY(), osmscout::Normalize(), and PushCoord().

◆ operator=()

CoordBuffer& osmscout::CoordBuffer::operator= ( const CoordBuffer & other )

delete

◆ PushCoord()

size_t osmscout::CoordBuffer::PushCoord ( const Vertex2D & coord )

Push coordinate to the buffer.

Parameters

coord

Returns: position (index) of the new coordinate coordinate in the buffer

Note: x and y have to be valid, NaN is not allowed

References buffer, osmscout::Vertex2D::GetX(), osmscout::Vertex2D::GetY(), osmscout::log, and osmscout::Log::Warn().

Referenced by osmscout::CopyPolygonToCoordBuffer(), and GenerateParallelWay().

◆ Reset()

void osmscout::CoordBuffer::Reset ( )

Member Data Documentation

◆ buffer

Vertex2D* osmscout::CoordBuffer::buffer {new Vertex2D[bufferSize]()}

Referenced by osmscout::MapPainterAgg::DrawArea(), osmscout::MapPainterSVG::DrawArea(), osmscout::MapPainterAgg::DrawPath(), osmscout::MapPainterSVG::DrawPath(), GenerateParallelWay(), osmscout::CoordBufferRange::Get(), osmscout::CoordBufferRange::GetFirst(), osmscout::CoordBufferRange::GetLast(), PushCoord(), and ~CoordBuffer().

◆ emptyCoordBuffer

CoordBuffer osmscout::CoordBuffer::emptyCoordBuffer

static

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

Public Member Functions

Public Attributes

Static Public Attributes