Class: QgsCompoundCurve¶

class qgis.core.QgsCompoundCurve¶

Bases: qgis._core.QgsCurve

Compound curve geometry type

New in version 2.10: Enums

Methods

`addCurve`	Adds a curve to the geometry (takes ownership)
`addMValue`
`addToPainterPath`
`addVertex`	Adds a vertex to the end of the geometry.
`addZValue`
`asGml2`
`asGml3`
`asWkb`
`asWkt`
`calculateBoundingBox`
`childCount`
`childGeometry`
`childPoint`
`clear`
`clearCache`
`clone`
`close`	Appends first point if not already closed.
`closestSegment`
`createEmptyWithSameType`
`curveAt`	Returns the curve at the specified index.
`curveSubstring`
`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`
`interpolatePoint`
`isEmpty`
`length`
`moveVertex`
`nCurves`	Returns the number of curves in the geometry.
`numPoints`
`pointAt`
`points`
`removeCurve`	Removes a curve from the geometry.
`removeDuplicateNodes`
`reversed`
`segmentLength`
`setZMTypeFromSubGeometry`
`snappedToGrid`
`startPoint`
`sumUpArea`
`swapXy`
`transform`	transform(self, t: QTransform, zTranslate: float = 0, zScale: float = 1, mTranslate: float = 0, mScale: float = 1)
`vertexAngle`
`xAt`
`yAt`

Signals

Attributes

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 = '', axisOrder: QgsAbstractGeometry.AxisOrder = QgsAbstractGeometry.AxisOrder.XY) → QDomElement¶

asGml3(self, doc: QDomDocument, precision: int = 17, ns: str = '', axisOrder: QgsAbstractGeometry.AxisOrder = QgsAbstractGeometry.AxisOrder.XY) → QDomElement¶

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.

curveSubstring(self, startDistance: float, endDistance: float) → QgsCompoundCurve¶

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¶

interpolatePoint(self, distance: float) → QgsPoint¶

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) → List[QgsPoint]¶

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¶

swapXy(self)¶

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¶