OffsetCurveSetBuilder class

Creates all the raw offset curves for a buffer of a {@link Geometry}. Raw curves need to be noded together and polygonized to form the final buffer area.

@version 1.7

Constructors

OffsetCurveSetBuilder(Geometry inputGeom, double distance, OffsetCurveBuilder curveBuilder)

Properties

curveBuilder ↔ OffsetCurveBuilder

getter/setter pair

curveList ↔ List

getter/setter pair

distance ↔ double

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

inputGeom ↔ Geometry

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

add(Geometry g) → void

addCollection(GeometryCollection gc) → void

addCurve(List<Coordinate>? coord, int leftLoc, int rightLoc) → void

Creates a {@link SegmentString} for a coordinate list which is a raw offset curve, and adds it to the list of buffer curves. The SegmentString is tagged with a Label giving the topology of the curve. The curve may be oriented in either direction. If the curve is oriented CW, the locations will be:
Left: Location.EXTERIOR
Right: Location.INTERIOR

addLineString(LineString line) → void

addPoint(Point p) → void

Add a Point to the graph.

addPolygon(Polygon p) → void

addPolygonRing(List<Coordinate> coord, double offsetDistance, int side, int cwLeftLoc, int cwRightLoc) → void

Adds an offset curve for a polygon ring. The side and left and right topological location arguments assume that the ring is oriented CW. If the ring is in the opposite orientation, the left and right locations must be interchanged and the side flipped.

addRingBothSides(List<Coordinate> coord, double distance) → void

addRingSide(List<Coordinate> coord, double offsetDistance, int side, int cwLeftLoc, int cwRightLoc) → void

Adds an offset curve for one side of a ring. The side and left and right topological location arguments are provided as if the ring is oriented CW. (If the ring is in the opposite orientation, this is detected and the left and right locations are interchanged and the side is flipped.)

getCurves() → List

Computes the set of raw offset curves for the buffer. Each offset curve has an attached {@link Label} indicating its left and right location.

isErodedCompletely(LinearRing ring, double bufferDistance) → bool

The ringCoord is assumed to contain no repeated points. It may be degenerate (i.e. contain only 1, 2, or 3 points). In this case it has no area, and hence has a minimum diameter of 0.

isTriangleErodedCompletely(List<Coordinate> triangleCoord, double bufferDistance) → bool

Tests whether a triangular ring would be eroded completely by the given buffer distance. This is a precise test. It uses the fact that the inner buffer of a triangle converges on the inCentre of the triangle (the point equidistant from all sides). If the buffer distance is greater than the distance of the inCentre from a side, the triangle will be eroded completely.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited