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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.
162 lines
6.3 KiB
Python
162 lines
6.3 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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from builtins import str
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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 qgis.PyQt.QtCore import QVariant
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from qgis.core import (QgsApplication,
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QgsFeature,
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QgsFeatureSink,
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QgsFields,
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QgsField,
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QgsGeometry,
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QgsDistanceArea,
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QgsWkbTypes,
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QgsProcessingUtils)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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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
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class PointsToPaths(QgisAlgorithm):
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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 group(self):
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return self.tr('Vector creation tools')
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def __init__(self):
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super().__init__()
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self.addParameter(ParameterVector(self.VECTOR,
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self.tr('Input point layer'), [dataobjects.TYPE_VECTOR_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'), datatype=[dataobjects.TYPE_VECTOR_LINE]))
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self.addOutput(OutputDirectory(self.OUTPUT_TEXT, self.tr('Directory')))
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def name(self):
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return 'pointstopath'
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def displayName(self):
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return self.tr('Points to path')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.VECTOR), context)
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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 = str(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(fields, QgsWkbTypes.LineString, layer.crs(),
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context)
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points = dict()
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features = QgsProcessingUtils.getFeatures(layer, context)
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total = 100.0 / layer.featureCount() if layer.featureCount() else 0
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for current, 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(str(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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feedback.setProgress(int(current * total))
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feedback.setProgress(0)
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da = QgsDistanceArea()
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current = 0
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total = 100.0 / len(points) if points else 1
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for group, vertices in list(points.items()):
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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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with open(fileName, 'w') as fl:
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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, QgsFeatureSink.FastInsert)
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current += 1
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feedback.setProgress(int(current * total))
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del writer
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