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bb79d13e82
* Remove deprecated Qgis::WKBType and API cleanup Renames QgsWKBTypes to QgsWkbTypes Replaces usage of the enums: * Qgis::WKBType with QgsWkbTypes::Type * Qgis::GeometryType with QgsWkbTypes::GeometryType Their values should be forward compatible (a fact that was already explited up to now by casting between the types) Renames some SSLxxx to SslXxx and URIxxx to UriXxx * Fix build warnings and simplify type handling * Add a fixer to rewrite imports * The forgotten rebase conflictThe forgotten rebase conflicts * QgsDataSourcURI > QgsDataSourceUri * QgsWKBTypes > QgsWkbTypes * Qgis.WKBGeom > QgsWkbTypes.Geom * Further python fixes * Guess what... Qgis::wkbDimensions != QgsWkbTypes::wkbDimensions * Fix tests * Python 3 updates * [travis] pull request caching cannot be disabled so at least use it in r/w mode * Fix python3 print in plugins
70 lines
3.3 KiB
Plaintext
70 lines
3.3 KiB
Plaintext
class QgsMapToPixelSimplifier : QgsAbstractGeometrySimplifier
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{
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%TypeHeaderCode
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#include "qgsmaptopixelgeometrysimplifier.h"
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%End
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public:
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//! Types of simplification algorithms that can be used
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enum SimplifyAlgorithm
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{
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Distance = 0, //!< The simplification uses the distance between points to remove duplicate points
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SnapToGrid = 1, //!< The simplification uses a grid (similar to ST_SnapToGrid) to remove duplicate points
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Visvalingam = 2, //!< The simplification gives each point in a line an importance weighting, so that least important points are removed first
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};
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//! Constructor
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QgsMapToPixelSimplifier( int simplifyFlags, double tolerance, SimplifyAlgorithm simplifyAlgorithm = Distance );
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virtual ~QgsMapToPixelSimplifier();
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//! Applicable simplification flags
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enum SimplifyFlag
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{
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NoFlags = 0, //!< No simplification can be applied
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SimplifyGeometry = 1, //!< The geometries can be simplified using the current map2pixel context state
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SimplifyEnvelope = 2, //!< The geometries can be fully simplified by its BoundingBox
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};
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protected:
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//! Returns the squared 2D-distance of the vector defined by the two points specified
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static float calculateLengthSquared2D( double x1, double y1, double x2, double y2 );
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//! Returns whether the points belong to the same grid
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static bool equalSnapToGrid( double x1, double y1, double x2, double y2, double gridOriginX, double gridOriginY, float gridInverseSizeXY );
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public:
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//! Gets the simplification hints of the vector layer managed
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int simplifyFlags() const;
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//! Sets the simplification hints of the vector layer managed
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void setSimplifyFlags( int simplifyFlags );
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//! Gets the local simplification algorithm of the vector layer managed
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SimplifyAlgorithm simplifyAlgorithm() const;
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//! Sets the local simplification algorithm of the vector layer managed
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void setSimplifyAlgorithm( SimplifyAlgorithm simplifyAlgorithm );
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//! Returns a simplified version the specified geometry
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virtual QgsGeometry simplify( const QgsGeometry& geometry ) const;
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//! Simplifies the specified geometry
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virtual bool simplifyGeometry( QgsGeometry* geometry ) const;
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//! Simplifies the specified WKB-point array
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virtual bool simplifyPoints( QgsWkbTypes::Type wkbType, QgsConstWkbPtr& sourceWkbPtr, QPolygonF& targetPoints ) const;
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// MapToPixel simplification helper methods
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public:
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//! Returns whether the envelope can be replaced by its BBOX when is applied the specified map2pixel context
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static bool isGeneralizableByMapBoundingBox( const QgsRectangle& envelope, double map2pixelTol );
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//! Returns whether the envelope can be replaced by its BBOX when is applied the specified map2pixel context
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bool isGeneralizableByMapBoundingBox( const QgsRectangle& envelope ) const;
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//! Simplifies the geometry when is applied the specified map2pixel context
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static bool simplifyGeometry( QgsGeometry* geometry, int simplifyFlags, double tolerance, SimplifyAlgorithm simplifyAlgorithm = Distance );
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//! Simplifies the WKB-point array when is applied the specified map2pixel context
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static bool simplifyPoints( QgsWkbTypes::Type wkbType, QgsConstWkbPtr& sourceWkbPtr, QPolygonF& targetPoints, int simplifyFlags, double tolerance, SimplifyAlgorithm simplifyAlgorithm = Distance );
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};
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