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Class: JstsPolygonClipper

Hierarchy

• PolygonClipper

↳ JstsPolygonClipper

Index

Properties

• precision

Methods

• _getPolygonUnion
• _isEmpty
• _polygonArrayFromJstsResult
• difference
• intersection
• multiUnion
• prepareForJsts
• returnFromJsts
• union

Properties

Static Private precision

▪ precision: any = Config.get("modelLimits.maximumPositionPrecision")

Defined in src/util/polygon/JstsPolygonClipper.ts:9

Methods

Private _getPolygonUnion

▸ _getPolygonUnion(polygons: Array‹Polygon | MultiPolygon›): Polygon[]

Defined in src/util/polygon/JstsPolygonClipper.ts:109

Parameters:

Name	Type
polygons	Array‹Polygon | MultiPolygon›

Returns: Polygon[]

---

Private _isEmpty

▸ _isEmpty(polygons: Array‹Polygon | MultiPolygon›): boolean

Defined in src/util/polygon/JstsPolygonClipper.ts:114

Parameters:

Name	Type
polygons	Array‹Polygon | MultiPolygon›

Returns: boolean

---

Private _polygonArrayFromJstsResult

▸ _polygonArrayFromJstsResult(jstsResult: any): Polygon[]

Defined in src/util/polygon/JstsPolygonClipper.ts:118

Parameters:

Name	Type
jstsResult	any

Returns: Polygon[]

---

difference

▸ difference(base: Polygon | MultiPolygon, candidates: Array‹Polygon | MultiPolygon›): MultiPolygon

Overrides PolygonClipper.difference

Defined in src/util/polygon/JstsPolygonClipper.ts:66

Because jsts does not support difference operations on GeometryCollections we have to calculate the difference of all the given polygons "by hand" and combine them correctly in the end.

Parameters:

Name	Type	Description
base	Polygon | MultiPolygon	-
candidates	Array‹Polygon | MultiPolygon›

Returns: MultiPolygon

---

intersection

▸ intersection(base: Polygon | MultiPolygon, candidates: Array‹Polygon | MultiPolygon›): MultiPolygon

Overrides PolygonClipper.intersection

Defined in src/util/polygon/JstsPolygonClipper.ts:17

Because jsts was throwing some errors when passing several candidates we have to calculate the intersection of all the given polygons "by hand" by performing several intersections one after another.

Parameters:

Name	Type	Description
base	Polygon | MultiPolygon	-
candidates	Array‹Polygon | MultiPolygon›

Returns: MultiPolygon

---

multiUnion

▸ multiUnion(polygons: Array‹Polygon | MultiPolygon›): MultiPolygon

Overrides PolygonClipper.multiUnion

Defined in src/util/polygon/JstsPolygonClipper.ts:44

Parameters:

Name	Type
polygons	Array‹Polygon | MultiPolygon›

Returns: MultiPolygon

---

prepareForJsts

▸ prepareForJsts(base: Polygon | MultiPolygon): any

Defined in src/util/polygon/JstsPolygonClipper.ts:92

Parameters:

Name	Type
base	Polygon | MultiPolygon

Returns: any

---

returnFromJsts

▸ returnFromJsts(jstsResult: any): MultiPolygon

Defined in src/util/polygon/JstsPolygonClipper.ts:100

Parameters:

Name	Type
jstsResult	any

Returns: MultiPolygon

---

union

▸ union(base: Polygon | MultiPolygon, candidates: Array‹Polygon | MultiPolygon›): MultiPolygon

Overrides PolygonClipper.union

Defined in src/util/polygon/JstsPolygonClipper.ts:40

Parameters:

Name	Type
base	Polygon | MultiPolygon
candidates	Array‹Polygon | MultiPolygon›

Returns: MultiPolygon