Subgroup: other

Class: QgsCircularString

class qgis.core.QgsCircularString

Bases: qgis._core.QgsCurve

Constructs an empty circular string.

QgsCircularString(p1: QgsPoint, p2: QgsPoint, p3: QgsPoint) Constructs a circular string with a single arc passing through p1, p2 and p3.

New in version 3.2.

QgsCircularString(QgsCircularString)

Circular string geometry type

New in version 2.10: Methods

addMValue
addToPainterPath
addZValue
asGml2
asGml3
asJson
asWkb
asWkt
calculateBoundingBox
childCount
childGeometry
childPoint
clear
clearCache
clone
closestSegment
createEmptyWithSameType
curveSubstring
curveToLine
deleteVertex
dimension
draw
drawAsPolygon
dropMValue
dropZValue
endPoint
equals
fromTwoPointsAndCenter Creates a circular string with a single arc representing the curve from p1 to p2 with the specified center.
fromWkb
fromWkt
geometryType
hasChildGeometries
hasCurvedSegments
insertVertex
interpolatePoint
isEmpty
length
moveVertex
numPoints
pointAt
pointN Returns the point at index i within the circular string.
points
removeDuplicateNodes
reversed
segmentLength
setPoints Sets the circular string’s points
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

addMValue(self, mValue: float = 0) → bool
addToPainterPath(self, path: QPainterPath)
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) → QgsCircularString
closestSegment(self, pt: QgsPoint, epsilon: float = 4*DBL_EPSILON) → Tuple[float, QgsPoint, QgsVertexId, int]
createEmptyWithSameType(self) → QgsCircularString
curveSubstring(self, startDistance: float, endDistance: float) → QgsCircularString
curveToLine(self, tolerance: float = M_PI_2/90, toleranceType: QgsAbstractGeometry.SegmentationToleranceType = QgsAbstractGeometry.MaximumAngle) → QgsLineString
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
fromTwoPointsAndCenter(p1: QgsPoint, p2: QgsPoint, center: QgsPoint, useShortestArc: bool = True) → QgsCircularString

Creates a circular string with a single arc representing the curve from p1 to p2 with the specified center.

If useShortestArc is true, then the arc returned will be that corresponding to the shorter arc from p1 to p2. If it is false, the longer arc from p1 to p2 will be used (i.e. winding the other way around the circle).

New in version 3.2.

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

Returns the point at index i within the circular string.

points(self) → object
removeDuplicateNodes(self, epsilon: float = 4*DBL_EPSILON, useZValues: bool = False) → bool
reversed(self) → QgsCircularString
segmentLength(self, startVertex: QgsVertexId) → float
setPoints(self, points: object)

Sets the circular string’s points

setZMTypeFromSubGeometry()
snappedToGrid(self, hSpacing: float, vSpacing: float, dSpacing: float = 0, mSpacing: float = 0) → QgsCircularString
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