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fd2c18ee16
temporary output layers in the provided processing context Should fix loss of intermediate memory layers when running a multi-step model
101 lines
3.6 KiB
Python
101 lines
3.6 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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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__ = 'Victor Olaya'
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__date__ = 'October 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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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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import os
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from qgis.core import (QgsGeometry,
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QgsPoint,
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QgsWkbTypes,
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QgsApplication,
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QgsProcessingUtils)
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterNumber
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects, vector
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class DensifyGeometries(GeoAlgorithm):
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INPUT = 'INPUT'
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VERTICES = 'VERTICES'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QgsApplication.getThemeIcon("/providerQgis.svg")
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def svgIconPath(self):
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return QgsApplication.iconPath("providerQgis.svg")
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def tags(self):
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return self.tr('add,vertices,points').split(',')
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def group(self):
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return self.tr('Vector geometry tools')
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def name(self):
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return 'densifygeometries'
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def displayName(self):
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return self.tr('Densify geometries')
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def defineCharacteristics(self):
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Input layer'),
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[dataobjects.TYPE_VECTOR_POLYGON, dataobjects.TYPE_VECTOR_LINE]))
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self.addParameter(ParameterNumber(self.VERTICES,
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self.tr('Vertices to add'), 1, 10000000, 1))
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self.addOutput(OutputVector(self.OUTPUT,
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self.tr('Densified')))
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def processAlgorithm(self, context, feedback):
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layer = dataobjects.getLayerFromString(
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self.getParameterValue(self.INPUT))
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vertices = self.getParameterValue(self.VERTICES)
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isPolygon = layer.geometryType() == QgsWkbTypes.PolygonGeometry
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writer = self.getOutputFromName(
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self.OUTPUT).getVectorWriter(layer.fields().toList(), layer.wkbType(), layer.crs(), context)
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / QgsProcessingUtils.featureCount(layer, context)
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for current, f in enumerate(features):
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feature = f
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if feature.hasGeometry():
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new_geometry = feature.geometry().densifyByCount(int(vertices))
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feature.setGeometry(new_geometry)
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writer.addFeature(feature)
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feedback.setProgress(int(current * total))
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del writer
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