#include <BufferBuilder.h>
Public Member Functions | |
BufferBuilder (const BufferParameters &nBufParams) | |
void | setWorkingPrecisionModel (const geom::PrecisionModel *pm) |
void | setNoder (noding::Noder *newNoder) |
geom::Geometry * | buffer (const geom::Geometry *g, double distance) |
geom::Geometry * | bufferLineSingleSided (const geom::Geometry *g, double distance, bool leftSide) |
Allows setting the level of approximation for circular arcs, and the precision model in which to carry out the computation.
When computing buffers in floating point double-precision it can happen that the process of iterated noding can fail to converge (terminate).
In this case a TopologyException will be thrown. Retrying the computation in a fixed precision can produce more robust results.
geos::operation::buffer::BufferBuilder::BufferBuilder | ( | const BufferParameters & | nBufParams | ) | [inline] |
Creates a new BufferBuilder
nBufParams | buffer parameters, this object will keep a reference to the passed parameters so caller must make sure the object is kept alive for the whole lifetime of the buffer builder. |
geom::Geometry* geos::operation::buffer::BufferBuilder::bufferLineSingleSided | ( | const geom::Geometry * | g, | |
double | distance, | |||
bool | leftSide | |||
) |
Generates offset curve for linear geometry.
g | non-areal geometry object | |
distance | width of offset | |
leftSide | controls on which side of the input geometry offset curve is generated. |
BufferParameters::setSingleSided parameter, which is specific to areal geometries only, is ignored by this routine.
Not in JTS: this is a GEOS extension
void geos::operation::buffer::BufferBuilder::setNoder | ( | noding::Noder * | newNoder | ) | [inline] |
Sets the noding::Noder to use during noding. This allows choosing fast but non-robust noding, or slower but robust noding.
noder | the noder to use |
void geos::operation::buffer::BufferBuilder::setWorkingPrecisionModel | ( | const geom::PrecisionModel * | pm | ) | [inline] |
Sets the precision model to use during the curve computation and noding, if it is different to the precision model of the Geometry. If the precision model is less than the precision of the Geometry precision model, the Geometry must have previously been rounded to that precision.
pm | the precision model to use |