QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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Polyhedral surface geometry type. More...
#include <qgspolyhedralsurface.h>
Public Member Functions | |
QgsPolyhedralSurface () | |
QgsPolyhedralSurface (const QgsMultiPolygon *multiPolygon) | |
Creates a polyhedral surface from a multiPolygon. | |
QgsPolyhedralSurface (const QgsPolyhedralSurface &p) | |
~QgsPolyhedralSurface () override | |
bool | addMValue (double mValue=0) override |
Adds a measure to the geometry, initialized to a preset value. | |
virtual void | addPatch (QgsPolygon *patch) |
Adds a patch to the geometry, transferring ownership to the polyhedral surface. | |
bool | addZValue (double zValue=0) override |
Adds a z-dimension to the geometry, initialized to a preset value. | |
void | adjacentVertices (QgsVertexId vertex, QgsVertexId &previousVertex, QgsVertexId &nextVertex) const override |
Returns the vertices adjacent to a specified vertex within a geometry. | |
double | area () const override |
Returns the planar, 2-dimensional area of the geometry. | |
QDomElement | asGml2 (QDomDocument &doc, int precision=17, const QString &ns="gml", QgsAbstractGeometry::AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const override |
Returns a GML2 representation of the geometry. | |
QDomElement | asGml3 (QDomDocument &doc, int precision=17, const QString &ns="gml", QgsAbstractGeometry::AxisOrder axisOrder=QgsAbstractGeometry::AxisOrder::XY) const override |
Returns a GML3 representation of the geometry. | |
json | asJsonObject (int precision=17) const override |
Returns a json object representation of the geometry. | |
QString | asKml (int precision=17) const override |
Returns a KML representation of the geometry. | |
QPainterPath | asQPainterPath () const override |
Returns the geometry represented as a QPainterPath. | |
QByteArray | asWkb (QgsAbstractGeometry::WkbFlags flags=QgsAbstractGeometry::WkbFlags()) const override |
Returns a WKB representation of the geometry. | |
QString | asWkt (int precision=17) const override |
Returns a WKT representation of the geometry. | |
QgsAbstractGeometry * | boundary () const override |
Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the geometry). | |
bool | boundingBoxIntersects (const QgsBox3D &box3d) const override |
Returns true if the bounding box of this geometry intersects with a box3d. | |
void | clear () override |
Clears the geometry, ie reset it to a null geometry. | |
QgsPolyhedralSurface * | clone () const override |
Clones the geometry by performing a deep copy. | |
double | closestSegment (const QgsPoint &pt, QgsPoint &segmentPt, QgsVertexId &vertexAfter, int *leftOf=nullptr, double epsilon=4 *std::numeric_limits< double >::epsilon()) const override |
Searches for the closest segment of the geometry to a given point. | |
QgsCoordinateSequence | coordinateSequence () const override |
Retrieves the sequence of geometries, rings and nodes. | |
QgsPolyhedralSurface * | createEmptyWithSameType () const override |
Creates a new geometry with the same class and same WKB type as the original and transfers ownership. | |
bool | deleteVertex (QgsVertexId position) override |
Deletes a vertex within the geometry. | |
int | dimension () const final |
Returns the inherent dimension of the geometry. | |
void | draw (QPainter &p) const override |
Draws the geometry using the specified QPainter. | |
bool | dropMValue () override |
Drops any measure values which exist in the geometry. | |
bool | dropZValue () override |
Drops any z-dimensions which exist in the geometry. | |
void | filterVertices (const std::function< bool(const QgsPoint &) > &filter) override |
Filters the vertices from the geometry in place, removing any which do not return true for the filter function check. | |
bool | fromWkb (QgsConstWkbPtr &wkb) override |
Sets the geometry from a WKB string. | |
bool | fromWkt (const QString &wkt) override |
Sets the geometry from a WKT string. | |
bool | fuzzyDistanceEqual (const QgsAbstractGeometry &other, double epsilon=1e-8) const override |
Performs fuzzy distance comparison between this geometry and other using an epsilon. | |
bool | fuzzyEqual (const QgsAbstractGeometry &other, double epsilon=1e-8) const override |
Performs fuzzy comparison between this geometry and other using an epsilon. | |
QString | geometryType () const override |
Returns a unique string representing the geometry type. | |
bool | hasCurvedSegments () const final |
Returns true if the geometry contains curved segments. | |
bool | insertVertex (QgsVertexId position, const QgsPoint &vertex) override |
Inserts a vertex into the geometry. | |
bool | isEmpty () const override |
Returns true if the geometry is empty. | |
bool | isValid (QString &error, Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const override |
Checks validity of the geometry, and returns true if the geometry is valid. | |
bool | moveVertex (QgsVertexId position, const QgsPoint &newPos) override |
Moves a vertex within the geometry. | |
int | nCoordinates () const override |
Returns the number of nodes contained in the geometry. | |
bool | nextVertex (QgsVertexId &id, QgsPoint &vertex) const override |
Returns next vertex id and coordinates. | |
void | normalize () override |
Reorganizes the geometry into a normalized form (or "canonical" form). | |
int | numPatches () const |
Returns the number of patches contained with the polyhedral surface. | |
bool | operator!= (const QgsAbstractGeometry &other) const override |
QgsPolyhedralSurface & | operator= (const QgsPolyhedralSurface &p) |
bool | operator== (const QgsAbstractGeometry &other) const override |
int | partCount () const override |
Returns count of parts contained in the geometry. | |
QgsPolygon * | patchN (int i) |
Retrieves a patch from the polyhedral surface. | |
const QgsPolygon * | patchN (int i) const |
Retrieves a patch from the polyhedral surface. | |
double | perimeter () const override |
Returns the planar, 2-dimensional perimeter of the geometry. | |
bool | removeDuplicateNodes (double epsilon=4 *std::numeric_limits< double >::epsilon(), bool useZValues=false) override |
Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerate geometry. | |
bool | removePatch (int patchIndex) |
Removes a patch from the polyhedral surface. | |
int | ringCount (int part=0) const override |
Returns the number of rings of which this geometry is built. | |
QgsAbstractGeometry * | segmentize (double tolerance=M_PI_2/90, SegmentationToleranceType toleranceType=MaximumAngle) const override |
Returns a geometry without curves. | |
double | segmentLength (QgsVertexId startVertex) const override |
Returns the length of the segment of the geometry which begins at startVertex. | |
virtual void | setPatches (const QVector< QgsPolygon * > &patches) |
Sets all patches, transferring ownership to the polyhedral surface. | |
QgsPolyhedralSurface * | simplifyByDistance (double tolerance) const override |
Simplifies the geometry by applying the Douglas Peucker simplification by distance algorithm. | |
QgsPolyhedralSurface * | snappedToGrid (double hSpacing, double vSpacing, double dSpacing=0, double mSpacing=0, bool removeRedundantPoints=false) const override |
Makes a new geometry with all the points or vertices snapped to the closest point of the grid. | |
void | swapXy () override |
Swaps the x and y coordinates from the geometry. | |
QgsMultiSurface * | toCurveType () const override |
Returns the geometry converted to the more generic curve type. | |
QgsMultiPolygon * | toMultiPolygon () const |
Converts a polyhedral surface to a multipolygon. | |
void | transform (const QgsCoordinateTransform &ct, Qgis::TransformDirection d=Qgis::TransformDirection::Forward, bool transformZ=false) override |
Transforms the geometry using a coordinate transform. | |
void | transform (const QTransform &t, double zTranslate=0.0, double zScale=1.0, double mTranslate=0.0, double mScale=1.0) override |
Transforms the x and y components of the geometry using a QTransform object t. | |
bool | transform (QgsAbstractGeometryTransformer *transformer, QgsFeedback *feedback=nullptr) override |
Transforms the vertices from the geometry in place, using the specified geometry transformer object. | |
void | transformVertices (const std::function< QgsPoint(const QgsPoint &) > &transform) override |
Transforms the vertices from the geometry in place, applying the transform function to every vertex. | |
double | vertexAngle (QgsVertexId vertex) const override |
Returns approximate rotation angle for a vertex. | |
QgsPoint | vertexAt (QgsVertexId id) const override |
Returns the point corresponding to a specified vertex id. | |
int | vertexCount (int part=0, int ring=0) const override |
Returns the number of vertices of which this geometry is built. | |
int | vertexNumberFromVertexId (QgsVertexId id) const override |
Returns the vertex number corresponding to a vertex id. | |
int | wkbSize (QgsAbstractGeometry::WkbFlags flags=QgsAbstractGeometry::WkbFlags()) const override |
Returns the length of the QByteArray returned by asWkb() | |
Public Member Functions inherited from QgsSurface | |
QgsBox3D | boundingBox3D () const override |
Returns the 3D bounding box for the geometry. | |
bool | isValid (QString &error, Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const override |
Checks validity of the geometry, and returns true if the geometry is valid. | |
Public Member Functions inherited from QgsAbstractGeometry | |
QgsAbstractGeometry ()=default | |
QgsAbstractGeometry (const QgsAbstractGeometry &geom) | |
virtual | ~QgsAbstractGeometry ()=default |
QString | asJson (int precision=17) |
Returns a GeoJSON representation of the geometry as a QString. | |
virtual QgsRectangle | boundingBox () const |
Returns the minimal bounding box for the geometry. | |
virtual bool | boundingBoxIntersects (const QgsRectangle &rectangle) const |
Returns true if the bounding box of this geometry intersects with a rectangle. | |
virtual QgsPoint | centroid () const |
Returns the centroid of the geometry. | |
virtual int | compareTo (const QgsAbstractGeometry *other) const |
Comparator for sorting of geometry. | |
const_part_iterator | const_parts_begin () const |
Returns STL-style iterator pointing to the const first part of the geometry. | |
const_part_iterator | const_parts_end () const |
Returns STL-style iterator pointing to the imaginary const part after the last part of the geometry. | |
virtual bool | convertTo (Qgis::WkbType type) |
Converts the geometry to a specified type. | |
bool | is3D () const |
Returns true if the geometry is 3D and contains a z-value. | |
bool | isMeasure () const |
Returns true if the geometry contains m values. | |
virtual double | length () const |
Returns the planar, 2-dimensional length of the geometry. | |
QgsAbstractGeometry & | operator= (const QgsAbstractGeometry &geom) |
QgsGeometryPartIterator | parts () |
Returns Java-style iterator for traversal of parts of the geometry. | |
QgsGeometryConstPartIterator | parts () const |
Returns Java-style iterator for traversal of parts of the geometry. | |
part_iterator | parts_begin () |
Returns STL-style iterator pointing to the first part of the geometry. | |
part_iterator | parts_end () |
Returns STL-style iterator pointing to the imaginary part after the last part of the geometry. | |
virtual const QgsAbstractGeometry * | simplifiedTypeRef () const |
Returns a reference to the simplest lossless representation of this geometry, e.g. | |
QgsVertexIterator | vertices () const |
Returns a read-only, Java-style iterator for traversal of vertices of all the geometry, including all geometry parts and rings. | |
vertex_iterator | vertices_begin () const |
Returns STL-style iterator pointing to the first vertex of the geometry. | |
vertex_iterator | vertices_end () const |
Returns STL-style iterator pointing to the imaginary vertex after the last vertex of the geometry. | |
Qgis::WkbType | wkbType () const |
Returns the WKB type of the geometry. | |
QString | wktTypeStr () const |
Returns the WKT type string of the geometry. | |
Static Public Member Functions | |
static const QgsPolyhedralSurface * | cast (const QgsAbstractGeometry *geom) |
Cast the geom to a QgsPolyhedralSurface. | |
Static Public Member Functions inherited from QgsSurface | |
static const QgsSurface * | cast (const QgsAbstractGeometry *geom) |
Cast the geom to a QgsSurface. | |
Protected Member Functions | |
QgsBox3D | calculateBoundingBox3D () const override |
Calculates the minimal 3D bounding box for the geometry. | |
int | childCount () const override |
Returns number of child geometries (for geometries with child geometries) or child points (for geometries without child geometries - i.e. | |
QgsAbstractGeometry * | childGeometry (int index) const override |
Returns pointer to child geometry (for geometries with child geometries - i.e. | |
int | compareToSameClass (const QgsAbstractGeometry *other) const override |
Compares to an other geometry of the same class, and returns a integer for sorting of the two geometries. | |
Protected Member Functions inherited from QgsSurface | |
void | clearCache () const override |
Clears any cached parameters associated with the geometry, e.g., bounding boxes. | |
Protected Member Functions inherited from QgsAbstractGeometry | |
virtual QgsRectangle | calculateBoundingBox () const |
Default calculator for the minimal bounding box for the geometry. | |
virtual QgsPoint | childPoint (int index) const |
Returns point at index (for geometries without child geometries - i.e. | |
virtual bool | hasChildGeometries () const |
Returns whether the geometry has any child geometries (false for point / curve, true otherwise) | |
void | setZMTypeFromSubGeometry (const QgsAbstractGeometry *subggeom, Qgis::WkbType baseGeomType) |
Updates the geometry type based on whether sub geometries contain z or m values. | |
int | sortIndex () const |
Returns the sort index for the geometry, used in the compareTo() method to compare geometries of different types. | |
Protected Attributes | |
QVector< QgsPolygon * > | mPatches |
Protected Attributes inherited from QgsSurface | |
QgsBox3D | mBoundingBox |
bool | mHasCachedValidity = false |
QString | mValidityFailureReason |
Protected Attributes inherited from QgsAbstractGeometry | |
Qgis::WkbType | mWkbType = Qgis::WkbType::Unknown |
Additional Inherited Members | |
Public Types inherited from QgsAbstractGeometry | |
enum | AxisOrder { XY = 0 , YX } |
Axis order for GML generation. More... | |
enum | SegmentationToleranceType { MaximumAngle = 0 , MaximumDifference } |
Segmentation tolerance as maximum angle or maximum difference between approximation and circle. More... | |
enum | WkbFlag { FlagExportTrianglesAsPolygons = 1 << 0 , FlagExportNanAsDoubleMin = 1 << 1 } |
WKB export flags. More... | |
typedef QFlags< WkbFlag > | WkbFlags |
Polyhedral surface geometry type.
A polyhedral surface is a collection of polygons which share common boundary segments.
Definition at line 37 of file qgspolyhedralsurface.h.
QgsPolyhedralSurface::QgsPolyhedralSurface | ( | ) |
Definition at line 38 of file qgspolyhedralsurface.cpp.
QgsPolyhedralSurface::QgsPolyhedralSurface | ( | const QgsPolyhedralSurface & | p | ) |
Definition at line 81 of file qgspolyhedralsurface.cpp.
QgsPolyhedralSurface::QgsPolyhedralSurface | ( | const QgsMultiPolygon * | multiPolygon | ) |
Creates a polyhedral surface from a multiPolygon.
Definition at line 43 of file qgspolyhedralsurface.cpp.
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override |
Definition at line 59 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Adds a measure to the geometry, initialized to a preset value.
mValue | initial m-value for all nodes |
true
on success Implements QgsAbstractGeometry.
Definition at line 839 of file qgspolyhedralsurface.cpp.
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virtual |
Adds a patch to the geometry, transferring ownership to the polyhedral surface.
Reimplemented in QgsTriangulatedSurface.
Definition at line 505 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Adds a z-dimension to the geometry, initialized to a preset value.
zValue | initial z-value for all nodes |
true
on success Implements QgsAbstractGeometry.
Definition at line 822 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the vertices adjacent to a specified vertex within a geometry.
Implements QgsAbstractGeometry.
Definition at line 679 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the planar, 2-dimensional area of the geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 352 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a GML2 representation of the geometry.
doc | DOM document |
precision | number of decimal places for coordinates |
ns | XML namespace |
axisOrder | Axis order for generated GML |
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 280 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a GML3 representation of the geometry.
doc | DOM document |
precision | number of decimal places for coordinates |
ns | XML namespace |
axisOrder | Axis order for generated GML |
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 286 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a json object representation of the geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 307 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a KML representation of the geometry.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 315 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the geometry represented as a QPainterPath.
Implements QgsAbstractGeometry.
Definition at line 542 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a WKB representation of the geometry.
The optional flags argument specifies flags controlling WKB export behavior (since QGIS 3.14).
Implements QgsAbstractGeometry.
Definition at line 237 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a WKT representation of the geometry.
precision | number of decimal places for coordinates |
Implements QgsAbstractGeometry.
Definition at line 252 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the closure of the combinatorial boundary of the geometry (ie the topological boundary of the geometry).
For instance, a polygon geometry will have a boundary consisting of the linestrings for each ring in the polygon.
nullptr
for some geometry types. Implements QgsAbstractGeometry.
Definition at line 376 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns true
if the bounding box of this geometry intersects with a box3d.
Since this test only considers the bounding box of the geometry, is is very fast to calculate and handles invalid geometries.
Reimplemented from QgsAbstractGeometry.
Definition at line 465 of file qgspolyhedralsurface.cpp.
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overrideprotectedvirtual |
Calculates the minimal 3D bounding box for the geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 211 of file qgspolyhedralsurface.cpp.
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inlinestatic |
Cast the geom to a QgsPolyhedralSurface.
Should be used by qgsgeometry_cast<QgsPolyhedralSurface *>( geometry ).
Definition at line 309 of file qgspolyhedralsurface.h.
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overrideprotectedvirtual |
Returns number of child geometries (for geometries with child geometries) or child points (for geometries without child geometries - i.e.
curve / point)
Reimplemented from QgsAbstractGeometry.
Definition at line 960 of file qgspolyhedralsurface.cpp.
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overrideprotectedvirtual |
Returns pointer to child geometry (for geometries with child geometries - i.e.
geom. collection / polygon)
Reimplemented from QgsAbstractGeometry.
Definition at line 965 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Clears the geometry, ie reset it to a null geometry.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 119 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Clones the geometry by performing a deep copy.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 114 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Searches for the closest segment of the geometry to a given point.
pt | specifies the point to find closest segment to |
segmentPt | storage for the closest point within the geometry |
vertexAfter | storage for the ID of the vertex at the end of the closest segment |
leftOf | indicates whether the point lies on the left side of the geometry (-1 if point is to the left of the geometry, +1 if the point is to the right of the geometry, or 0 for cases where left/right could not be determined, e.g. point exactly on a line) false if point is to right of segment) |
epsilon | epsilon for segment snapping |
Implements QgsAbstractGeometry.
Definition at line 642 of file qgspolyhedralsurface.cpp.
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overrideprotectedvirtual |
Compares to an other geometry of the same class, and returns a integer for sorting of the two geometries.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 970 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Retrieves the sequence of geometries, rings and nodes.
Implements QgsAbstractGeometry.
Definition at line 584 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Creates a new geometry with the same class and same WKB type as the original and transfers ownership.
To create it, the geometry is default constructed and then the WKB is changed.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 64 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Deletes a vertex within the geometry.
position | vertex id for vertex to delete |
true
if delete was successful Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 727 of file qgspolyhedralsurface.cpp.
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finalvirtual |
Returns the inherent dimension of the geometry.
For example, this is 0 for a point geometry, 1 for a linestring and 2 for a polygon.
Implements QgsAbstractGeometry.
Definition at line 76 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Draws the geometry using the specified QPainter.
p | destination QPainter |
Implements QgsAbstractGeometry.
Definition at line 555 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Drops any measure values which exist in the geometry.
true
if m-values were present and have been removed Implements QgsAbstractGeometry.
Definition at line 872 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Drops any z-dimensions which exist in the geometry.
true
if Z values were present and have been removed Implements QgsAbstractGeometry.
Definition at line 856 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Filters the vertices from the geometry in place, removing any which do not return true
for the filter function check.
Has no meaning when called on a single point geometry.
Depending on the filter used, this may result in an invalid geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 940 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Sets the geometry from a WKB string.
After successful read the wkb argument will be at the position where the reading has stopped.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 128 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Sets the geometry from a WKT string.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 167 of file qgspolyhedralsurface.cpp.
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inlineoverridevirtual |
Performs fuzzy distance comparison between this geometry and other using an epsilon.
Traditionally, the comparison is done by examining the specific values (such as x and y) that define the location of vertices in the geometry. It focuses on the numerical differences or relationships between these values. On the other hand, comparing distances between points considers the actual spatial separation or length between the points, regardless of their coordinate values. This comparison involves measuring the distance between two points using formulas like the distance formula. Here, it's the "distance comparison" (fuzzyDistanceEqual).
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 95 of file qgspolyhedralsurface.h.
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inlineoverridevirtual |
Performs fuzzy comparison between this geometry and other using an epsilon.
The comparison is done by examining the specific values (such as x and y) that define the location of vertices in the geometry.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 91 of file qgspolyhedralsurface.h.
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overridevirtual |
Returns a unique string representing the geometry type.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 71 of file qgspolyhedralsurface.cpp.
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finalvirtual |
Returns true
if the geometry contains curved segments.
Reimplemented from QgsAbstractGeometry.
Definition at line 749 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Inserts a vertex into the geometry.
position | vertex id for position of inserted vertex |
vertex | vertex to insert |
true
if insert was successful Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 693 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns true
if the geometry is empty.
Reimplemented from QgsAbstractGeometry.
Definition at line 637 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Checks validity of the geometry, and returns true
if the geometry is valid.
error | will be set to the validity error message |
flags | indicates optional flags which control the type of validity checking performed (corresponding to Qgis::GeometryValidityFlags). |
true
if geometry is validImplements QgsAbstractGeometry.
Definition at line 999 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Moves a vertex within the geometry.
position | vertex id for vertex to move |
newPos | new position of vertex |
true
if move was successful Implements QgsAbstractGeometry.
Definition at line 710 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the number of nodes contained in the geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 600 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns next vertex id and coordinates.
id | initial value should be the starting vertex id. The next vertex id will be stored in this variable if found. |
vertex | container for found node |
false
if at end Implements QgsAbstractGeometry.
Definition at line 648 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Reorganizes the geometry into a normalized form (or "canonical" form).
Polygon rings will be rearranged so that their starting vertex is the lower left and ring orientation follows the right hand rule, collections are ordered by geometry type, and other normalization techniques are applied. The resultant geometry will be geometrically equivalent to the original geometry.
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 321 of file qgspolyhedralsurface.cpp.
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inline |
Returns the number of patches contained with the polyhedral surface.
Definition at line 145 of file qgspolyhedralsurface.h.
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inlineoverridevirtual |
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 105 of file qgspolyhedralsurface.h.
QgsPolyhedralSurface & QgsPolyhedralSurface::operator= | ( | const QgsPolyhedralSurface & | p | ) |
Definition at line 99 of file qgspolyhedralsurface.cpp.
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inlineoverridevirtual |
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 100 of file qgspolyhedralsurface.h.
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overridevirtual |
Returns count of parts contained in the geometry.
Implements QgsAbstractGeometry.
Definition at line 798 of file qgspolyhedralsurface.cpp.
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inline |
Retrieves a patch from the polyhedral surface.
The first patch has index 0.
Definition at line 171 of file qgspolyhedralsurface.h.
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inline |
Retrieves a patch from the polyhedral surface.
The first patch has index 0.
Definition at line 157 of file qgspolyhedralsurface.h.
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overridevirtual |
Returns the planar, 2-dimensional perimeter of the geometry.
Reimplemented from QgsAbstractGeometry.
Definition at line 364 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Removes duplicate nodes from the geometry, wherever removing the nodes does not result in a degenerate geometry.
The epsilon parameter specifies the tolerance for coordinates when determining that vertices are identical.
By default, z values are not considered when detecting duplicate nodes. E.g. two nodes with the same x and y coordinate but different z values will still be considered duplicate and one will be removed. If useZValues is true
, then the z values are also tested and nodes with the same x and y but different z will be maintained.
Note that duplicate nodes are not tested between different parts of a multipart geometry. E.g. a multipoint geometry with overlapping points will not be changed by this method.
The function will return true
if nodes were removed, or false
if no duplicate nodes were found.
Implements QgsAbstractGeometry.
Definition at line 451 of file qgspolyhedralsurface.cpp.
bool QgsPolyhedralSurface::removePatch | ( | int | patchIndex | ) |
Removes a patch from the polyhedral surface.
The first patch has index 0. The corresponding patch is removed from the polyhedral surface and deleted. If a patch was successfully removed the function will return true
.
Definition at line 530 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the number of rings of which this geometry is built.
Implements QgsAbstractGeometry.
Definition at line 790 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns a geometry without curves.
Caller takes ownership
tolerance | segmentation tolerance |
toleranceType | maximum segmentation angle or maximum difference between approximation and curve |
Reimplemented from QgsAbstractGeometry.
Definition at line 754 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the length of the segment of the geometry which begins at startVertex.
Implements QgsAbstractGeometry.
Definition at line 811 of file qgspolyhedralsurface.cpp.
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virtual |
Sets all patches, transferring ownership to the polyhedral surface.
Definition at line 492 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Simplifies the geometry by applying the Douglas Peucker simplification by distance algorithm.
The caller takes ownership of the returned geometry. Curved geometries will be segmentized prior to simplification.
If a simplified geometry cannot be calculated nullptr
will be returned.
The returned geometry may be invalid and contain self-intersecting rings.
Implements QgsAbstractGeometry.
Definition at line 437 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Makes a new geometry with all the points or vertices snapped to the closest point of the grid.
Ownership is transferred to the caller.
If the gridified geometry could not be calculated nullptr
will be returned. It may generate an invalid geometry (in some corner cases). It can also be thought as rounding the edges and it may be useful for removing errors.
Example:
In this case we use a 2D grid of 1x1 to gridify. In this case, it can be thought like rounding the x and y of all the points/vertices to full units (remove all decimals).
hSpacing | Horizontal spacing of the grid (x axis). 0 to disable. |
vSpacing | Vertical spacing of the grid (y axis). 0 to disable. |
dSpacing | Depth spacing of the grid (z axis). 0 (default) to disable. |
mSpacing | Custom dimension spacing of the grid (m axis). 0 (default) to disable. |
removeRedundantPoints | if true , then points which are redundant (e.g. they represent mid points on a straight line segment) will be skipped (since QGIS 3.38) |
Implements QgsAbstractGeometry.
Reimplemented in QgsTriangulatedSurface.
Definition at line 403 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Swaps the x and y coordinates from the geometry.
This can be used to repair geometries which have accidentally had their latitude and longitude coordinates reversed.
Implements QgsAbstractGeometry.
Definition at line 888 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the geometry converted to the more generic curve type.
E.g. QgsLineString -> QgsCompoundCurve, QgsPolygon -> QgsCurvePolygon, QgsMultiLineString -> QgsMultiCurve, QgsMultiPolygon -> QgsMultiSurface
Implements QgsAbstractGeometry.
Definition at line 897 of file qgspolyhedralsurface.cpp.
QgsMultiPolygon * QgsPolyhedralSurface::toMultiPolygon | ( | ) | const |
Converts a polyhedral surface to a multipolygon.
Caller takes ownership.
Definition at line 929 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Transforms the geometry using a coordinate transform.
ct | coordinate transform |
d | transformation direction |
transformZ | set to true to also transform z coordinates. This requires that the z coordinates in the geometry represent height relative to the vertical datum of the source CRS (generally ellipsoidal heights) and are expressed in its vertical units (generally meters). If false , then z coordinates will not be changed by the transform. |
Implements QgsAbstractGeometry.
Definition at line 566 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Transforms the x and y components of the geometry using a QTransform object t.
Optionally, the geometry's z values can be scaled via zScale and translated via zTranslate. Similarly, m-values can be scaled via mScale and translated via mTranslate.
Implements QgsAbstractGeometry.
Definition at line 575 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Transforms the vertices from the geometry in place, using the specified geometry transformer object.
Depending on the transformer used, this may result in an invalid geometry.
The optional feedback argument can be used to cancel the transformation before it completes. If this is done, the geometry will be left in a semi-transformed state.
true
if the geometry was successfully transformed.Implements QgsAbstractGeometry.
Definition at line 908 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Transforms the vertices from the geometry in place, applying the transform function to every vertex.
Depending on the transform used, this may result in an invalid geometry.
Transform functions are not permitted to alter the dimensionality of vertices. If a transform which adds (or removes) z/m values is desired, first call the corresponding addZValue() or addMValue() function to change the geometry's dimensionality and then transform.
Reimplemented from QgsAbstractGeometry.
Definition at line 950 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns approximate rotation angle for a vertex.
Usually average angle between adjacent segments.
vertex | the vertex id |
Implements QgsAbstractGeometry.
Definition at line 762 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the point corresponding to a specified vertex id.
Implements QgsAbstractGeometry.
Definition at line 803 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the number of vertices of which this geometry is built.
Implements QgsAbstractGeometry.
Definition at line 773 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the vertex number corresponding to a vertex id.
The vertex numbers start at 0, so a return value of 0 corresponds to the first vertex.
Returns -1 if a corresponding vertex could not be found.
Implements QgsAbstractGeometry.
Definition at line 610 of file qgspolyhedralsurface.cpp.
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overridevirtual |
Returns the length of the QByteArray returned by asWkb()
The optional flags argument specifies flags controlling WKB export behavior
Implements QgsAbstractGeometry.
Definition at line 227 of file qgspolyhedralsurface.cpp.
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protected |
Definition at line 377 of file qgspolyhedralsurface.h.