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
asGml2
asGml3
asJson
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
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.

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) → 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
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