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b1cadb1822
have specific icons, instead of generic qgis icon We consider these 'top level' algorithms, and using the standard algorithm icon should help reflect this and differentiate them from 3rd party algorithms.
92 lines
3.7 KiB
Python
92 lines
3.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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DensifyGeometriesInterval.py by Anita Graser, Dec 2012
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based on DensifyGeometries.py
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---------------------
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Date : October 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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from builtins import range
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__author__ = 'Anita Graser'
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__date__ = 'Dec 2012'
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__copyright__ = '(C) 2012, Anita Graser'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from math import sqrt
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from qgis.core import (QgsWkbTypes,
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QgsApplication,
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QgsFeatureSink,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterNumber,
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QgsProcessingParameterFeatureSink,
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QgsProcessingOutputVectorLayer,
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QgsProcessingParameterDefinition)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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class DensifyGeometriesInterval(QgisAlgorithm):
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INPUT = 'INPUT'
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INTERVAL = 'INTERVAL'
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OUTPUT = 'OUTPUT'
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def group(self):
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return self.tr('Vector geometry tools')
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def __init__(self):
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super().__init__()
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self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
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self.tr('Input layer'), [QgsProcessingParameterDefinition.TypeVectorPolygon, QgsProcessingParameterDefinition.TypeVectorLine]))
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self.addParameter(QgsProcessingParameterNumber(self.INTERVAL,
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self.tr('Interval between vertices to add'), QgsProcessingParameterNumber.Double,
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1, False, 0, 10000000))
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self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Densified')))
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self.addOutput(QgsProcessingOutputVectorLayer(self.OUTPUT, self.tr('Densified')))
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def name(self):
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return 'densifygeometriesgivenaninterval'
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def displayName(self):
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return self.tr('Densify geometries given an interval')
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def processAlgorithm(self, parameters, context, feedback):
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source = self.parameterAsSource(parameters, self.INPUT, context)
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interval = self.parameterAsDouble(parameters, self.INTERVAL, context)
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(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
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source.fields(), source.wkbType(), source.sourceCrs())
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features = source.getFeatures()
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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for current, f in enumerate(features):
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if feedback.isCanceled():
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break
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feature = f
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if feature.hasGeometry():
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new_geometry = feature.geometry().densifyByDistance(float(interval))
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feature.setGeometry(new_geometry)
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sink.addFeature(feature, QgsFeatureSink.FastInsert)
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feedback.setProgress(int(current * total))
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return {self.OUTPUT: dest_id}
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