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a769448e70
- Add QgsGeometry method to densify by distance - Fix bug in processing algorithm which resulted in duplicate vertices and incorrectly spaced extra vertices
81 lines
3.1 KiB
Python
81 lines
3.1 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 QgsPoint, QgsGeometry, QgsWkbTypes
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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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class DensifyGeometriesInterval(GeoAlgorithm):
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INPUT = 'INPUT'
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INTERVAL = 'INTERVAL'
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OUTPUT = 'OUTPUT'
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Densify geometries given an interval')
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self.group, self.i18n_group = self.trAlgorithm('Vector geometry tools')
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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.INTERVAL,
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self.tr('Interval between vertices to add'), 0.0, 10000000.0, 1.0))
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self.addOutput(OutputVector(self.OUTPUT, self.tr('Densified')))
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def processAlgorithm(self, feedback):
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layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
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interval = self.getParameterValue(self.INTERVAL)
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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(),
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layer.wkbType(), layer.crs())
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features = vector.features(layer)
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total = 100.0 / len(features)
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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(float(interval))
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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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