Subgroup: other

Class: QgsCompoundCurve¶

class qgis.core.QgsCompoundCurve¶

Bases: qgis._core.QgsCurve

Compound curve geometry type

New in version 2.10: Methods

`addCurve`	Adds a curve to the geometry (takes ownership)
`addMValue`
`addToPainterPath`
`addVertex`	Adds a vertex to the end of the geometry.
`addZValue`
`adjacentVertices`
`area`	Returns the area of the geometry.
`asGml2`
`asGml3`
`asJson`
`asQPolygonF`	Returns a QPolygonF representing the points.
`asWkb`
`asWkt`
`boundary`
`boundingBox`
`calculateBoundingBox`
`centroid`	Returns the centroid of the geometry
`childCount`
`childGeometry`
`childPoint`
`clear`
`clearCache`
`clone`
`close`	Appends first point if not already closed.
`closestSegment`
`convertTo`	Converts the geometry to a specified type.
`coordinateSequence`
`createEmptyWithSameType`
`curveAt`	Returns the curve at the specified index.
`curveToLine`	Returns a new line string geometry corresponding to a segmentized approximation of the curve.
`deleteVertex`
`dimension`
`draw`
`drawAsPolygon`
`dropMValue`
`dropZValue`
`endPoint`
`equals`
`fromWkb`
`fromWkt`
`geometryType`
`hasChildGeometries`
`hasCurvedSegments`
`insertVertex`
`is3D`	Returns true if the geometry is 3D and contains a z-value.
`isClosed`	Returns true if the curve is closed.
`isEmpty`
`isMeasure`	Returns true if the geometry contains m values.
`isRing`	Returns true if the curve is a ring.
`length`
`moveVertex`
`nCoordinates`	Returns the number of nodes contained in the geometry
`nCurves`	Returns the number of curves in the geometry.
`nextVertex`
`numPoints`
`partCount`
`perimeter`	Returns the perimeter of the geometry.
`pointAt`
`points`
`removeCurve`	Removes a curve from the geometry.
`removeDuplicateNodes`
`reversed`
`ringCount`
`segmentLength`
`segmentize`	Returns a geometry without curves.
`setZMTypeFromSubGeometry`
`snappedToGrid`
`startPoint`
`sumUpArea`
`toCurveType`
`transform`	transform(self, t: QTransform, zTranslate: float = 0, zScale: float = 1, mTranslate: float = 0, mScale: float = 1)
`vertexAngle`
`vertexAt`
`vertexCount`
`vertexNumberFromVertexId`
`vertices`	Returns Java-style iterator for traversal of vertices of the geometry
`wkbType`	Returns the WKB type of the geometry.
`wktTypeStr`	Returns the WKT type string of the geometry.
`xAt`
`yAt`

Attributes

`MaximumAngle`
`MaximumDifference`

addCurve(self, c: QgsCurve)¶: Adds a curve to the geometry (takes ownership)

addMValue(self, mValue: float = 0) → bool¶

addToPainterPath(self, path: QPainterPath)¶

addVertex(self, pt: QgsPoint)¶: Adds a vertex to the end of the geometry.

addZValue(self, zValue: float = 0) → bool¶

asGml2(self, doc: QDomDocument, precision: int = 17, ns: str = '') → QDomElement¶

asGml3(self, doc: QDomDocument, precision: int = 17, ns: str = '') → QDomElement¶

asJson(self, precision: int = 17) → str¶

asWkb(self) → QByteArray¶

asWkt(self, precision: int = 17) → str¶

calculateBoundingBox(self) → QgsRectangle¶

childCount()¶

childGeometry()¶

childPoint()¶

clear(self)¶

clearCache()¶

clone(self) → QgsCompoundCurve¶

close(self)¶: Appends first point if not already closed.

closestSegment(self, pt: QgsPoint, epsilon: float = 4*DBL_EPSILON) → Tuple[float, QgsPoint, QgsVertexId, int]¶

createEmptyWithSameType(self) → QgsCompoundCurve¶

curveAt(self, i: int) → QgsCurve¶: Returns the curve at the specified index.

curveToLine(self, tolerance: float = M_PI_2/90, toleranceType: QgsAbstractGeometry.SegmentationToleranceType = QgsAbstractGeometry.MaximumAngle) → QgsLineString¶

Returns a new line string geometry corresponding to a segmentized approximation of the curve.

Parameters:	tolerance – segmentation tolerance toleranceType – maximum segmentation angle or maximum difference between approximation and curve*

deleteVertex(self, position: QgsVertexId) → bool¶

dimension(self) → int¶

draw(self, p: QPainter)¶

drawAsPolygon(self, p: QPainter)¶

dropMValue(self) → bool¶

dropZValue(self) → bool¶

endPoint(self) → QgsPoint¶

equals(self, other: QgsCurve) → bool¶

fromWkb(self, wkb: QgsConstWkbPtr) → bool¶

fromWkt(self, wkt: str) → bool¶

geometryType(self) → str¶

hasChildGeometries()¶

hasCurvedSegments(self) → bool¶

insertVertex(self, position: QgsVertexId, vertex: QgsPoint) → bool¶

isEmpty(self) → bool¶

length(self) → float¶

moveVertex(self, position: QgsVertexId, newPos: QgsPoint) → bool¶

nCurves(self) → int¶: Returns the number of curves in the geometry.

numPoints(self) → int¶

pointAt(self, node: int, point: QgsPoint) → Tuple[bool, QgsVertexId.VertexType]¶

points(self) → object¶

removeCurve(self, i: int)¶

Removes a curve from the geometry.

Parameters:	i – index of curve to remove

removeDuplicateNodes(self, epsilon: float = 4*DBL_EPSILON, useZValues: bool = False) → bool¶

reversed(self) → QgsCompoundCurve¶

segmentLength(self, startVertex: QgsVertexId) → float¶

setZMTypeFromSubGeometry()¶

snappedToGrid(self, hSpacing: float, vSpacing: float, dSpacing: float = 0, mSpacing: float = 0) → QgsCompoundCurve¶

startPoint(self) → QgsPoint¶

sumUpArea(self) → float¶

transform(self, ct: QgsCoordinateTransform, d: QgsCoordinateTransform.TransformDirection = QgsCoordinateTransform.ForwardTransform, transformZ: bool = False)¶: transform(self, t: QTransform, zTranslate: float = 0, zScale: float = 1, mTranslate: float = 0, mScale: float = 1)

vertexAngle(self, vertex: QgsVertexId) → float¶

xAt(self, index: int) → float¶

yAt(self, index: int) → float¶