API Reference > core-geometry > Curve > ParityRegion

ParityRegion Class

  • A ParityRegion is a collection of Loop objects.
  • The loops collectively define a planar region.
  • A point is "in" the composite region if it is "in" an odd number of the loops.

see Curve Collections learning article.

Extends

Methods

Name Description
constructor(): ParityRegion Construct parity region with empty loop array  
addLoops(data?: Loop | Loop[] | Loop[][]): void Add loops (recursively) to this region's children  
announceToCurveProcessor(processor: RecursiveCurveProcessor, indexInParent: number = -1): void invoke processor.announceParityRegion(this, indexInParent)  
clone(): ParityRegion Return a deep copy.  
cloneEmptyPeer(): ParityRegion Create a new empty parity region.  
cloneStroked(options?: StrokeOptions): ParityRegion Stroke these curves into a new ParityRegion.  
dgnBoundaryType(): number Return the boundary type (4) of a corresponding MicroStation CurveVector  
dispatchToGeometryHandler(handler: GeometryHandler): any Second step of double dispatch: call handler.handleRegion(this)  
getChild(i: number): undefined | Loop Get child i by index.  
isSameGeometryClass(other: GeometryQuery): boolean Test if other is an instance of ParityRegion  
tryAddChild(child: undefined | AnyCurve): boolean Add child to this parity region.  
create(...data: Loop[]): ParityRegion Static Create a parity region with given loops  
createLoops(data?: Loop | Loop[] | Loop[][]): Loop | ParityRegion Static Return a single loop or parity region with given loops.  

Inherited methods

Name Inherited from Description
checkForNonLinearPrimitives(): boolean CurveCollection return true if the curve collection has any primitives other than LineSegment3d and LineString3d
cloneTransformed(transform: Transform): undefined | CurveCollection CurveCollection Create a deep copy of transformed curves.
cloneWithExpandedLineStrings(): CurveCollection CurveCollection Create a deep copy with all linestrings expanded to multiple LineSegment3d.
closestPoint(spacePoint: Point3d): undefined | CurveLocationDetail CurveCollection Return the closest point on the contained curves
collectCurvePrimitives(collectorArray?: CurvePrimitive[], smallestPossiblePrimitives: boolean = false, explodeLineStrings: boolean = false): CurvePrimitive[] CurveCollection Return an array containing only the curve primitives.
extendRange(rangeToExtend: Range3d, transform?: Transform): void CurveCollection Extend (increase) rangeToExtend as needed to include these curves (optionally transformed)
isAlmostEqual(other: GeometryQuery): boolean CurveCollection test for exact structure and nearly identical geometry.
maxGap(): number CurveCollection return the max gap between adjacent primitives in Path and Loop collections.
projectedParameterRange(ray: Ray3d | Vector3d, lowHigh?: Range1d): undefined | Range1d CurveCollection Project instance geometry (via dispatch) onto the given ray, and return the extreme fractional parameters of projection.
range(transform?: Transform, result?: Range3d): Range3d CurveCollection return the range of the entire (tree) GeometryQuery
sumLengths(): number CurveCollection Return the sum of the lengths of all contained curves.
tryTransformInPlace(transform: Transform): boolean CurveCollection Apply transform recursively to children
tryTranslateInPlace(dx: number, dy: number = 0.0, dz: number = 0.0): boolean CurveCollection try to move the geometry by dx,dy,dz
areAlmostEqual(a: undefined | GeometryQuery, b: undefined | GeometryQuery): boolean Static CurveCollection apply instance method isAlmostEqual if both are defined.
createCurveLocationDetailOnAnyCurvePrimitive(source: undefined | GeometryQuery, fraction: number = 0.5): undefined | CurveLocationDetail Static CurveCollection * Find any curve primitive in the source.

Properties

Name Type Description
_children Protected Loop[] Array of loops in this parity region.  
children Accessor ReadOnly Loop[] Return the array of loops in this parity region.  
curveCollectionType Readonly "parityRegion" String name for schema properties  

Inherited properties

Name Type Inherited from Description
geometryCategory Readonly "curveCollection" CurveCollection String name for schema properties
isAnyRegionType Accessor ReadOnly boolean CurveCollection Return true for planar region types:
* Loop
* ParityRegion
* UnionRegion
isClosedPath Accessor ReadOnly boolean CurveCollection Return true for a single-loop planar region type, i.e. Loop.
* This is _not- a test for physical closure of a Path
isInner boolean CurveCollection Flag for inner loop status.
isOpenPath Accessor ReadOnly boolean CurveCollection Return true for a Path, i.e. a chain of curves joined head-to-tail

Defined in

Last Updated: 30 November, 2023