QGIS API Documentation 3.40.0-Bratislava (b56115d8743)
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Decorator class for Triangulations (s. More...
#include <TriDecorator.h>
Public Member Functions | |
TriDecorator ()=default | |
TriDecorator (QgsTriangulation *t) | |
Constructor for TriDecorator with an existing triangulation. | |
void | addLine (const QVector< QgsPoint > &points, QgsInterpolator::SourceType lineType) override |
Adds a line (e.g. | |
int | addPoint (const QgsPoint &p) override |
Adds a point to the triangulation. | |
virtual void | addTriangulation (QgsTriangulation *t) |
Adds an association to a triangulation. | |
bool | calcNormal (double x, double y, QgsPoint &result) override |
Calculates the normal at a point on the surface and assigns it to 'result'. | |
bool | calcPoint (double x, double y, QgsPoint &result) override |
Calculates x-, y and z-value of the point on the surface and assigns it to 'result'. | |
void | eliminateHorizontalTriangles () override |
Eliminates the horizontal triangles by swapping. | |
int | oppositePoint (int p1, int p2) override |
Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge). | |
void | performConsistencyTest () override |
Performs a consistency check, remove this later. | |
QgsPoint * | point (int i) const override |
Returns a pointer to the point with number i. | |
bool | pointInside (double x, double y) override |
Returns true , if the point with coordinates x and y is inside the convex hull and false otherwise. | |
QList< int > | pointsAroundEdge (double x, double y) override |
Returns a value list with the numbers of the four points, which would be affected by an edge swap. | |
int | pointsCount () const override |
Returns the number of points. | |
void | ruppertRefinement () override |
Adds points to make the triangles better shaped (algorithm of ruppert) | |
void | setForcedCrossBehavior (QgsTriangulation::ForcedCrossBehavior b) override |
Draws the points, edges and the forced lines. | |
void | setTriangleInterpolator (TriangleInterpolator *interpolator) override |
Sets an interpolator object. | |
QList< int > | surroundingTriangles (int pointno) override |
Returns a value list with the information of the triangles surrounding (counterclockwise) a point. | |
bool | swapEdge (double x, double y) override |
Reads the content of a taff-file. | |
bool | triangleVertices (double x, double y, QgsPoint &p1, int &n1, QgsPoint &p2, int &n2, QgsPoint &p3, int &n3) override |
Finds out in which triangle the point with coordinates x and y is and assigns the numbers of the vertices to 'n1', 'n2' and 'n3' and the vertices to 'p1', 'p2' and 'p3'. | |
bool | triangleVertices (double x, double y, QgsPoint &p1, QgsPoint &p2, QgsPoint &p3) override |
Finds out, in which triangle the point with coordinates x and y is and assigns the points at the vertices to 'p1', 'p2' and 'p3. | |
double | xMax () const override |
Returns the largest x-coordinate value of the bounding box. | |
double | xMin () const override |
Returns the smallest x-coordinate value of the bounding box. | |
double | yMax () const override |
Returns the largest y-coordinate value of the bounding box. | |
double | yMin () const override |
Returns the smallest x-coordinate value of the bounding box. | |
Public Member Functions inherited from QgsTriangulation | |
virtual | ~QgsTriangulation ()=default |
virtual bool | saveTriangulation (QgsFeatureSink *sink, QgsFeedback *feedback=nullptr) const =0 |
Saves the triangulation features to a feature sink. | |
virtual QgsMesh | triangulationToMesh (QgsFeedback *feedback=nullptr) const =0 |
Returns a QgsMesh corresponding to the triangulation. | |
Protected Attributes | |
QgsTriangulation * | mTIN = nullptr |
Association with a Triangulation object. | |
Additional Inherited Members | |
Public Types inherited from QgsTriangulation | |
enum | ForcedCrossBehavior { SnappingTypeVertex , DeleteFirst , InsertVertex } |
Enumeration describing the behavior, if two forced lines cross. More... | |
Static Public Member Functions inherited from QgsTriangulation | |
static QgsFields | triangulationFields () |
Returns the fields output by features when calling saveTriangulation(). | |
Decorator class for Triangulations (s.
Decorator pattern in Gamma et al.).
Definition at line 31 of file TriDecorator.h.
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default |
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inlineexplicit |
Constructor for TriDecorator with an existing triangulation.
Definition at line 70 of file TriDecorator.h.
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overridevirtual |
Adds a line (e.g.
a break-, structure- or an isoline) to the triangulation, by specifying a list of source points.
Implements QgsTriangulation.
Definition at line 20 of file TriDecorator.cpp.
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overridevirtual |
Adds a point to the triangulation.
The point should have a z-value matching the value to interpolate.
Implements QgsTriangulation.
Definition at line 32 of file TriDecorator.cpp.
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inlinevirtual |
Adds an association to a triangulation.
Definition at line 76 of file TriDecorator.h.
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overridevirtual |
Calculates the normal at a point on the surface and assigns it to 'result'.
true
in case of success and false
in case of failure Implements QgsTriangulation.
Definition at line 58 of file TriDecorator.cpp.
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overridevirtual |
Calculates x-, y and z-value of the point on the surface and assigns it to 'result'.
Returns true
in case of success and false
in case of failure
Implements QgsTriangulation.
Definition at line 72 of file TriDecorator.cpp.
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overridevirtual |
Eliminates the horizontal triangles by swapping.
Implements QgsTriangulation.
Definition at line 246 of file TriDecorator.cpp.
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overridevirtual |
Returns the number of the point opposite to the triangle points p1, p2 (which have to be on a halfedge).
Returns -1 if point is a virtual point. Returns -10 if point crosses over edges.
Implements QgsTriangulation.
Definition at line 141 of file TriDecorator.cpp.
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overridevirtual |
Performs a consistency check, remove this later.
Implements QgsTriangulation.
Definition at line 46 of file TriDecorator.cpp.
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overridevirtual |
Returns a pointer to the point with number i.
Implements QgsTriangulation.
Definition at line 86 of file TriDecorator.cpp.
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overridevirtual |
Returns true
, if the point with coordinates x and y is inside the convex hull and false
otherwise.
Implements QgsTriangulation.
Definition at line 270 of file TriDecorator.cpp.
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overridevirtual |
Returns a value list with the numbers of the four points, which would be affected by an edge swap.
This function is e.g. needed by NormVecDecorator to know the points, for which the normals have to be recalculated. The list has to be deleted by the code which calls this method
Implements QgsTriangulation.
Definition at line 298 of file TriDecorator.cpp.
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overridevirtual |
Returns the number of points.
Implements QgsTriangulation.
Definition at line 128 of file TriDecorator.cpp.
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overridevirtual |
Adds points to make the triangles better shaped (algorithm of ruppert)
Implements QgsTriangulation.
Definition at line 258 of file TriDecorator.cpp.
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overridevirtual |
Draws the points, edges and the forced lines.
Sets the behavior of the triangulation in case of crossing forced lines
Implements QgsTriangulation.
Definition at line 222 of file TriDecorator.cpp.
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overridevirtual |
Sets an interpolator object.
Implements QgsTriangulation.
Definition at line 234 of file TriDecorator.cpp.
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overridevirtual |
Returns a value list with the information of the triangles surrounding (counterclockwise) a point.
Four integer values describe a triangle, the first three are the number of the half edges of the triangle and the fourth is -10, if the third (and most counterclockwise) edge is a breakline, and -20 otherwise. Any virtual point needs to have the number -1
Implements QgsTriangulation.
Definition at line 155 of file TriDecorator.cpp.
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overridevirtual |
Reads the content of a taff-file.
Saves the content to a taff file Swaps the edge which is closest to the point with x and y coordinates (if this is possible)
Implements QgsTriangulation.
Definition at line 284 of file TriDecorator.cpp.
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overridevirtual |
Finds out in which triangle the point with coordinates x and y is and assigns the numbers of the vertices to 'n1', 'n2' and 'n3' and the vertices to 'p1', 'p2' and 'p3'.
Implements QgsTriangulation.
Definition at line 100 of file TriDecorator.cpp.
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overridevirtual |
Finds out, in which triangle the point with coordinates x and y is and assigns the points at the vertices to 'p1', 'p2' and 'p3.
Implements QgsTriangulation.
Definition at line 114 of file TriDecorator.cpp.
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overridevirtual |
Returns the largest x-coordinate value of the bounding box.
Implements QgsTriangulation.
Definition at line 167 of file TriDecorator.cpp.
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overridevirtual |
Returns the smallest x-coordinate value of the bounding box.
Implements QgsTriangulation.
Definition at line 181 of file TriDecorator.cpp.
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overridevirtual |
Returns the largest y-coordinate value of the bounding box.
Implements QgsTriangulation.
Definition at line 194 of file TriDecorator.cpp.
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overridevirtual |
Returns the smallest x-coordinate value of the bounding box.
Implements QgsTriangulation.
Definition at line 208 of file TriDecorator.cpp.
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protected |
Association with a Triangulation object.
Definition at line 65 of file TriDecorator.h.