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| 1 | +/*************************************************************************** |
| 2 | + qgsalgorithmsegmentize.cpp |
| 3 | + --------------------- |
| 4 | + begin : March 2018 |
| 5 | + copyright : (C) 2018 by Nyall Dawson |
| 6 | + email : nyall dot dawson at gmail dot com |
| 7 | + ***************************************************************************/ |
| 8 | + |
| 9 | +/*************************************************************************** |
| 10 | + * * |
| 11 | + * This program is free software; you can redistribute it and/or modify * |
| 12 | + * it under the terms of the GNU General Public License as published by * |
| 13 | + * the Free Software Foundation; either version 2 of the License, or * |
| 14 | + * (at your option) any later version. * |
| 15 | + * * |
| 16 | + ***************************************************************************/ |
| 17 | + |
| 18 | +#include "qgsalgorithmsegmentize.h" |
| 19 | + |
| 20 | +///@cond PRIVATE |
| 21 | + |
| 22 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::name() const |
| 23 | +{ |
| 24 | + return QStringLiteral( "segmentizebymaxdistance" ); |
| 25 | +} |
| 26 | + |
| 27 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::displayName() const |
| 28 | +{ |
| 29 | + return QObject::tr( "Segmentize by maximum distance" ); |
| 30 | +} |
| 31 | + |
| 32 | +QStringList QgsSegmentizeByMaximumDistanceAlgorithm::tags() const |
| 33 | +{ |
| 34 | + return QObject::tr( "straighten,linearize,densify,curves,curved,circular" ).split( ',' ); |
| 35 | +} |
| 36 | + |
| 37 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::group() const |
| 38 | +{ |
| 39 | + return QObject::tr( "Vector geometry" ); |
| 40 | +} |
| 41 | + |
| 42 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::groupId() const |
| 43 | +{ |
| 44 | + return QStringLiteral( "vectorgeometry" ); |
| 45 | +} |
| 46 | + |
| 47 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::outputName() const |
| 48 | +{ |
| 49 | + return QObject::tr( "Segmentized" ); |
| 50 | +} |
| 51 | + |
| 52 | +QString QgsSegmentizeByMaximumDistanceAlgorithm::shortHelpString() const |
| 53 | +{ |
| 54 | + return QObject::tr( "This algorithm segmentizes a geometry by converting curved sections to linear sections.\n\n" |
| 55 | + "The segmentization is performed by specifying the maximum allowed offset distance between the original" |
| 56 | + "curve and the segmentized representation.\n\n" |
| 57 | + "Non-curved geometries will be retained without change." ); |
| 58 | +} |
| 59 | + |
| 60 | +QgsSegmentizeByMaximumDistanceAlgorithm *QgsSegmentizeByMaximumDistanceAlgorithm::createInstance() const |
| 61 | +{ |
| 62 | + return new QgsSegmentizeByMaximumDistanceAlgorithm(); |
| 63 | +} |
| 64 | + |
| 65 | +QList<int> QgsSegmentizeByMaximumDistanceAlgorithm::inputLayerTypes() const |
| 66 | +{ |
| 67 | + return QList<int>() << QgsProcessing::TypeVectorLine << QgsProcessing::TypeVectorPolygon; |
| 68 | +} |
| 69 | + |
| 70 | +void QgsSegmentizeByMaximumDistanceAlgorithm::initParameters( const QVariantMap & ) |
| 71 | +{ |
| 72 | + std::unique_ptr< QgsProcessingParameterNumber > tolerance = qgis::make_unique< QgsProcessingParameterNumber >( QStringLiteral( "DISTANCE" ), |
| 73 | + QObject::tr( "Maximum offset distance" ), QgsProcessingParameterNumber::Double, |
| 74 | + 1.0, false, 0, 10000000.0 ); |
| 75 | + tolerance->setIsDynamic( true ); |
| 76 | + tolerance->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "DISTANCE" ), QObject::tr( "Maximum offset distance" ), QgsPropertyDefinition::DoublePositive ) ); |
| 77 | + tolerance->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) ); |
| 78 | + addParameter( tolerance.release() ); |
| 79 | +} |
| 80 | + |
| 81 | +bool QgsSegmentizeByMaximumDistanceAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * ) |
| 82 | +{ |
| 83 | + mTolerance = parameterAsDouble( parameters, QStringLiteral( "DISTANCE" ), context ); |
| 84 | + mDynamicTolerance = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "DISTANCE" ) ); |
| 85 | + if ( mDynamicTolerance ) |
| 86 | + mToleranceProperty = parameters.value( QStringLiteral( "DISTANCE" ) ).value< QgsProperty >(); |
| 87 | + |
| 88 | + return true; |
| 89 | +} |
| 90 | + |
| 91 | +QgsFeatureList QgsSegmentizeByMaximumDistanceAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * ) |
| 92 | +{ |
| 93 | + QgsFeature f = feature; |
| 94 | + if ( f.hasGeometry() ) |
| 95 | + { |
| 96 | + QgsGeometry geometry = f.geometry(); |
| 97 | + double tolerance = mTolerance; |
| 98 | + if ( mDynamicTolerance ) |
| 99 | + tolerance = mToleranceProperty.valueAsDouble( context.expressionContext(), tolerance ); |
| 100 | + geometry.convertToStraightSegment( tolerance, QgsAbstractGeometry::MaximumDifference ); |
| 101 | + f.setGeometry( geometry ); |
| 102 | + } |
| 103 | + return QgsFeatureList() << f; |
| 104 | +} |
| 105 | + |
| 106 | + |
| 107 | + |
| 108 | + |
| 109 | + |
| 110 | +QString QgsSegmentizeByMaximumAngleAlgorithm::name() const |
| 111 | +{ |
| 112 | + return QStringLiteral( "segmentizebymaxangle" ); |
| 113 | +} |
| 114 | + |
| 115 | +QString QgsSegmentizeByMaximumAngleAlgorithm::displayName() const |
| 116 | +{ |
| 117 | + return QObject::tr( "Segmentize by maximum angle" ); |
| 118 | +} |
| 119 | + |
| 120 | +QStringList QgsSegmentizeByMaximumAngleAlgorithm::tags() const |
| 121 | +{ |
| 122 | + return QObject::tr( "straighten,linearize,densify,curves,curved,circular,angle" ).split( ',' ); |
| 123 | +} |
| 124 | + |
| 125 | +QString QgsSegmentizeByMaximumAngleAlgorithm::group() const |
| 126 | +{ |
| 127 | + return QObject::tr( "Vector geometry" ); |
| 128 | +} |
| 129 | + |
| 130 | +QString QgsSegmentizeByMaximumAngleAlgorithm::groupId() const |
| 131 | +{ |
| 132 | + return QStringLiteral( "vectorgeometry" ); |
| 133 | +} |
| 134 | + |
| 135 | +QString QgsSegmentizeByMaximumAngleAlgorithm::outputName() const |
| 136 | +{ |
| 137 | + return QObject::tr( "Segmentized" ); |
| 138 | +} |
| 139 | + |
| 140 | +QString QgsSegmentizeByMaximumAngleAlgorithm::shortHelpString() const |
| 141 | +{ |
| 142 | + return QObject::tr( "This algorithm segmentizes a geometry by converting curved sections to linear sections.\n\n" |
| 143 | + "The segmentization is performed by specifying the maximum allowed radius angle between vertices" |
| 144 | + "on the straightened geometry (e.g the angle of the arc created from the original arc center to consective" |
| 145 | + "output vertices on the linearized geometry).\n\n" |
| 146 | + "Non-curved geometries will be retained without change." ); |
| 147 | +} |
| 148 | + |
| 149 | +QgsSegmentizeByMaximumAngleAlgorithm *QgsSegmentizeByMaximumAngleAlgorithm::createInstance() const |
| 150 | +{ |
| 151 | + return new QgsSegmentizeByMaximumAngleAlgorithm(); |
| 152 | +} |
| 153 | + |
| 154 | +QList<int> QgsSegmentizeByMaximumAngleAlgorithm::inputLayerTypes() const |
| 155 | +{ |
| 156 | + return QList<int>() << QgsProcessing::TypeVectorLine << QgsProcessing::TypeVectorPolygon; |
| 157 | +} |
| 158 | + |
| 159 | +void QgsSegmentizeByMaximumAngleAlgorithm::initParameters( const QVariantMap & ) |
| 160 | +{ |
| 161 | + std::unique_ptr< QgsProcessingParameterNumber > tolerance = qgis::make_unique< QgsProcessingParameterNumber >( QStringLiteral( "ANGLE" ), |
| 162 | + QObject::tr( "Maximum angle between vertices (degrees)" ), QgsProcessingParameterNumber::Double, |
| 163 | + 5.0, false, 0, 360.0 ); |
| 164 | + tolerance->setIsDynamic( true ); |
| 165 | + tolerance->setDynamicPropertyDefinition( QgsPropertyDefinition( QStringLiteral( "ANGLE" ), QObject::tr( "Maximum angle between vertices (degrees)" ), QgsPropertyDefinition::DoublePositive ) ); |
| 166 | + tolerance->setDynamicLayerParameterName( QStringLiteral( "INPUT" ) ); |
| 167 | + addParameter( tolerance.release() ); |
| 168 | +} |
| 169 | + |
| 170 | +bool QgsSegmentizeByMaximumAngleAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * ) |
| 171 | +{ |
| 172 | + mTolerance = parameterAsDouble( parameters, QStringLiteral( "ANGLE" ), context ); |
| 173 | + mDynamicTolerance = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "ANGLE" ) ); |
| 174 | + if ( mDynamicTolerance ) |
| 175 | + mToleranceProperty = parameters.value( QStringLiteral( "ANGLE" ) ).value< QgsProperty >(); |
| 176 | + |
| 177 | + return true; |
| 178 | +} |
| 179 | + |
| 180 | +QgsFeatureList QgsSegmentizeByMaximumAngleAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback * ) |
| 181 | +{ |
| 182 | + QgsFeature f = feature; |
| 183 | + if ( f.hasGeometry() ) |
| 184 | + { |
| 185 | + QgsGeometry geometry = f.geometry(); |
| 186 | + double tolerance = mTolerance; |
| 187 | + if ( mDynamicTolerance ) |
| 188 | + tolerance = mToleranceProperty.valueAsDouble( context.expressionContext(), tolerance ); |
| 189 | + geometry.convertToStraightSegment( M_PI * tolerance / 180.0, QgsAbstractGeometry::MaximumAngle ); |
| 190 | + f.setGeometry( geometry ); |
| 191 | + } |
| 192 | + return QgsFeatureList() << f; |
| 193 | +} |
| 194 | + |
| 195 | +///@endcond |
| 196 | + |
| 197 | + |
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