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pep8 --ignore=E111,E128,E201,E202,E203,E211,E221,E222,E225,E226,E227,E231,E241,E261,E265,E272,E302,E303,E501,E701 \
--exclude="ui_*.py,debian/*,python/ext-libs/*" \
.
147 lines
5.5 KiB
Python
147 lines
5.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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PointsToPaths.py
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---------------------
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Date : April 2014
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Copyright : (C) 2014 by Alexander Bruy
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Email : alexander dot bruy 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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__author__ = 'Alexander Bruy'
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__date__ = 'April 2014'
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__copyright__ = '(C) 2014, Alexander Bruy'
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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 datetime import datetime
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from PyQt4.QtCore import QVariant
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from qgis.core import QGis, QgsFeature, QgsFields, QgsField, QgsGeometry, QgsDistanceArea
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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 ParameterTableField
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from processing.core.parameters import ParameterString
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from processing.core.outputs import OutputVector
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from processing.core.outputs import OutputDirectory
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from processing.tools import dataobjects, vector
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class PointsToPaths(GeoAlgorithm):
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VECTOR = 'VECTOR'
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GROUP_FIELD = 'GROUP_FIELD'
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ORDER_FIELD = 'ORDER_FIELD'
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DATE_FORMAT = 'DATE_FORMAT'
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#GAP_PERIOD = 'GAP_PERIOD'
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OUTPUT_LINES = 'OUTPUT_LINES'
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OUTPUT_TEXT = 'OUTPUT_TEXT'
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def defineCharacteristics(self):
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self.name = 'Points to path'
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self.group = 'Vector creation tools'
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self.addParameter(ParameterVector(self.VECTOR,
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self.tr('Input point layer'), [ParameterVector.VECTOR_TYPE_POINT]))
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self.addParameter(ParameterTableField(self.GROUP_FIELD,
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self.tr('Group field'), self.VECTOR))
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self.addParameter(ParameterTableField(self.ORDER_FIELD,
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self.tr('Order field'), self.VECTOR))
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self.addParameter(ParameterString(self.DATE_FORMAT,
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self.tr('Date format (if order field is DateTime)'), '', optional=True))
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#self.addParameter(ParameterNumber(
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# self.GAP_PERIOD,
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# 'Gap period (if order field is DateTime)', 0, 60, 0))
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self.addOutput(OutputVector(self.OUTPUT_LINES, self.tr('Paths')))
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self.addOutput(OutputDirectory(self.OUTPUT_TEXT, self.tr('Directory')))
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def processAlgorithm(self, progress):
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layer = dataobjects.getObjectFromUri(
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self.getParameterValue(self.VECTOR))
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groupField = self.getParameterValue(self.GROUP_FIELD)
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orderField = self.getParameterValue(self.ORDER_FIELD)
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dateFormat = unicode(self.getParameterValue(self.DATE_FORMAT))
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#gap = int(self.getParameterValue(self.GAP_PERIOD))
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dirName = self.getOutputValue(self.OUTPUT_TEXT)
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fields = QgsFields()
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fields.append(QgsField('group', QVariant.String, '', 254, 0))
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fields.append(QgsField('begin', QVariant.String, '', 254, 0))
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fields.append(QgsField('end', QVariant.String, '', 254, 0))
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writer = self.getOutputFromName(self.OUTPUT_LINES).getVectorWriter(
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fields, QGis.WKBLineString, layer.dataProvider().crs())
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points = dict()
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features = vector.features(layer)
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total = 100.0 / len(features)
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for count, f in enumerate(features):
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point = f.geometry().asPoint()
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group = f[groupField]
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order = f[orderField]
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if dateFormat != '':
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order = datetime.strptime(unicode(order), dateFormat)
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if group in points:
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points[group].append((order, point))
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else:
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points[group] = [(order, point)]
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progress.setPercentage(int(count * total))
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progress.setPercentage(0)
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da = QgsDistanceArea()
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count = 0
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total = 100.0 / len(points)
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for group, vertices in points.iteritems():
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vertices.sort()
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f = QgsFeature()
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f.initAttributes(len(fields))
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f.setFields(fields)
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f['group'] = group
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f['begin'] = vertices[0][0]
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f['end'] = vertices[-1][0]
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fileName = os.path.join(dirName, '%s.txt' % group)
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fl = open(fileName, 'w')
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fl.write('angle=Azimuth\n')
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fl.write('heading=Coordinate_System\n')
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fl.write('dist_units=Default\n')
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line = []
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i = 0
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for node in vertices:
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line.append(node[1])
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if i == 0:
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fl.write('startAt=%f;%f;90\n' % (node[1].x(), node[1].y()))
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fl.write('survey=Polygonal\n')
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fl.write('[data]\n')
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else:
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angle = line[i-1].azimuth(line[i])
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distance = da.measureLine(line[i-1], line[i])
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fl.write('%f;%f;90\n' % (angle, distance))
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i += 1
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f.setGeometry(QgsGeometry.fromPolyline(line))
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writer.addFeature(f)
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count += 1
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progress.setPercentage(int(count * total))
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del writer
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fl.close()
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