TSLBufferHelper Class Reference

Detailed Description

This class provides methods for buffering entities.

Currently the entities that can be buffered are polylines, polygons and symbols.

Static Public Member Functions
static TSLPolygon *	buffer (const TSLPolygon *polygon, const int distance, const int curveIncrementInDegrees=5)
static TSLEntity *	buffer (const TSLPolyline *polyline, const int distance, const TSLBufferSideSelection side=TSLBufferSideSelectionLeft)
static TSLEntity *	buffer (const TSLPolyline *polyline, const int distance, const TSLCoord &point)
static TSLEllipse *	buffer (const TSLSymbol *symbol, const int distance)
static TSLEntity *	buffer (const TSLEntity *entity, const int distance)

Member Function Documentation

buffer() [1/5]

static TSLEntity * TSLBufferHelper::buffer ( const TSLEntity * entity, const int distance )

static

This method buffers the given entity by the specified distance.

Parameters

entity	The entity to be buffered.
distance	The size of the buffer in TMC units.

Returns

the buffered entity on success, NULL otherwise.

buffer() [2/5]

static TSLPolygon * TSLBufferHelper::buffer ( const TSLPolygon * polygon, const int distance, const int curveIncrementInDegrees = 5 )

static

This method buffers the given polygon by the specified distance.

Parameters

polygon	The polygon to be buffered.
distance	The width of the buffer in TMC units.
curveIncrementInDegrees	Determines the smoothness of the disc used to perform the buffering. The smaller the value, the smoother the buffer. Defaults to 5 degrees.

Returns

the buffered polygon on success, NULL otherwise.

buffer() [3/5]

static TSLEntity * TSLBufferHelper::buffer ( const TSLPolyline * polyline, const int distance, const TSLBufferSideSelection side = TSLBufferSideSelectionLeft )

static

This method buffers the given polyline by the specified distance on the specified side.

Parameters

polyline	The polyline to be buffered.
distance	The width of the buffer in TMC units (for a double sided buffer this should be half the width).
side	The side of the polyline to be buffered. Defaults to TSLBufferSide SelectionLeft.

Returns

the buffered polyline on success, NULL otherwise.

buffer() [4/5]

static TSLEntity * TSLBufferHelper::buffer ( const TSLPolyline * polyline, const int distance, const TSLCoord & point )

static

This method buffers the given polyline by the specified distance on the side specified by the given point.

Parameters

polyline	The polyline to be buffered.
distance	The width of the buffer in TMC units.
point	The point that determines which side the polyline should be buffered on.

Returns

the buffered polyline on success, NULL otherwise.

buffer() [5/5]

static TSLEllipse * TSLBufferHelper::buffer ( const TSLSymbol * symbol, const int distance )

static

This method buffers the given symbol, returning a circle with the specified distance as the radius.

Parameters

symbol	The symbol to be buffered.
distance	The radius of the circle in TMC units.

Returns

the buffered symbol on success, NULL otherwise.