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[processing] restore Shortest path from point to layer
This commit is contained in:
Alexander Bruy
parent
c5ed53942c
commit
494ceff3b4
@ -90,7 +90,7 @@ from .SelectByExpression import SelectByExpression
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# from .ServiceAreaFromLayer import ServiceAreaFromLayer
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# from .ServiceAreaFromPoint import ServiceAreaFromPoint
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# from .ShortestPathLayerToPoint import ShortestPathLayerToPoint
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# from .ShortestPathPointToLayer import ShortestPathPointToLayer
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from .ShortestPathPointToLayer import ShortestPathPointToLayer
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from .ShortestPathPointToPoint import ShortestPathPointToPoint
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from .SimplifyGeometries import SimplifyGeometries
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from .Slope import Slope
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@ -274,6 +274,7 @@ class QGISAlgorithmProvider(QgsProcessingProvider):
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SaveSelectedFeatures(),
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SelectByAttribute(),
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SelectByExpression(),
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ShortestPathPointToLayer(),
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ShortestPathPointToPoint(),
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SimplifyGeometries(),
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Slope(),
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@ -31,10 +31,24 @@ from collections import OrderedDict
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from qgis.PyQt.QtCore import QVariant
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from qgis.PyQt.QtGui import QIcon
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from qgis.core import (QgsWkbTypes, QgsUnitTypes, QgsFeatureSink, QgsFeature, QgsGeometry, QgsPointXY, QgsFields, QgsField, QgsFeatureRequest,
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from qgis.core import (QgsWkbTypes,
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QgsUnitTypes,
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QgsFeature,
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QgsFeatureSink,
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QgsGeometry,
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QgsFields,
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QgsField,
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QgsMessageLog,
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QgsProcessingParameterDefinition,
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QgsProcessingUtils)
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QgsProcessing,
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QgsProcessingParameterEnum,
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QgsProcessingParameterPoint,
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QgsProcessingParameterField,
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QgsProcessingParameterNumber,
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QgsProcessingParameterString,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterFeatureSink,
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QgsProcessingParameterVectorLayer,
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QgsProcessingParameterDefinition)
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from qgis.analysis import (QgsVectorLayerDirector,
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QgsNetworkDistanceStrategy,
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QgsNetworkSpeedStrategy,
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@ -44,22 +58,13 @@ from qgis.analysis import (QgsVectorLayerDirector,
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from qgis.utils import iface
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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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ParameterPoint,
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ParameterNumber,
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ParameterString,
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ParameterTableField,
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ParameterSelection
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)
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from processing.core.outputs import OutputVector
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from processing.tools import dataobjects
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pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
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class ShortestPathPointToLayer(QgisAlgorithm):
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INPUT_VECTOR = 'INPUT_VECTOR'
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INPUT = 'INPUT'
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START_POINT = 'START_POINT'
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END_POINTS = 'END_POINTS'
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STRATEGY = 'STRATEGY'
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@ -71,7 +76,7 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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SPEED_FIELD = 'SPEED_FIELD'
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DEFAULT_SPEED = 'DEFAULT_SPEED'
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TOLERANCE = 'TOLERANCE'
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OUTPUT_LAYER = 'OUTPUT_LAYER'
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OUTPUT = 'OUTPUT'
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def icon(self):
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return QIcon(os.path.join(pluginPath, 'images', 'networkanalysis.svg'))
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@ -92,58 +97,59 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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self.tr('Fastest')
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]
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self.addParameter(ParameterVector(self.INPUT_VECTOR,
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self.tr('Vector layer representing network'),
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[dataobjects.TYPE_VECTOR_LINE]))
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self.addParameter(ParameterPoint(self.START_POINT,
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self.tr('Start point')))
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self.addParameter(ParameterVector(self.END_POINTS,
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self.tr('Vector layer with end points'),
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[dataobjects.TYPE_VECTOR_POINT]))
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self.addParameter(ParameterSelection(self.STRATEGY,
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self.tr('Path type to calculate'),
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self.STRATEGIES,
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default=0))
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self.addParameter(QgsProcessingParameterVectorLayer(self.INPUT,
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self.tr('Vector layer representing network'),
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[QgsProcessing.TypeVectorLine]))
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self.addParameter(QgsProcessingParameterPoint(self.START_POINT,
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self.tr('Start point')))
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self.addParameter(QgsProcessingParameterFeatureSource(self.END_POINTS,
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self.tr('Vector layer with end points'),
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[QgsProcessing.TypeVectorPoint]))
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self.addParameter(QgsProcessingParameterEnum(self.STRATEGY,
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self.tr('Path type to calculate'),
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self.STRATEGIES,
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defaultValue=0))
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params = []
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params.append(ParameterTableField(self.DIRECTION_FIELD,
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self.tr('Direction field'),
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self.INPUT_VECTOR,
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optional=True))
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params.append(ParameterString(self.VALUE_FORWARD,
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self.tr('Value for forward direction'),
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'',
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optional=True))
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params.append(ParameterString(self.VALUE_BACKWARD,
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self.tr('Value for backward direction'),
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'',
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optional=True))
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params.append(ParameterString(self.VALUE_BOTH,
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self.tr('Value for both directions'),
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'',
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optional=True))
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params.append(ParameterSelection(self.DEFAULT_DIRECTION,
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self.tr('Default direction'),
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list(self.DIRECTIONS.keys()),
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default=2))
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params.append(ParameterTableField(self.SPEED_FIELD,
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self.tr('Speed field'),
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self.INPUT_VECTOR,
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optional=True))
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params.append(ParameterNumber(self.DEFAULT_SPEED,
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self.tr('Default speed (km/h)'),
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0.0, 99999999.999999, 5.0))
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params.append(ParameterNumber(self.TOLERANCE,
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self.tr('Topology tolerance'),
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0.0, 99999999.999999, 0.0))
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params.append(QgsProcessingParameterField(self.DIRECTION_FIELD,
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self.tr('Direction field'),
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None,
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self.INPUT,
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optional=True))
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params.append(QgsProcessingParameterString(self.VALUE_FORWARD,
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self.tr('Value for forward direction'),
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optional=True))
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params.append(QgsProcessingParameterString(self.VALUE_BACKWARD,
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self.tr('Value for backward direction'),
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optional=True))
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params.append(QgsProcessingParameterString(self.VALUE_BOTH,
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self.tr('Value for both directions'),
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optional=True))
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params.append(QgsProcessingParameterEnum(self.DEFAULT_DIRECTION,
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self.tr('Default direction'),
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list(self.DIRECTIONS.keys()),
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defaultValue=2))
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params.append(QgsProcessingParameterField(self.SPEED_FIELD,
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self.tr('Speed field'),
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None,
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self.INPUT,
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optional=True))
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params.append(QgsProcessingParameterNumber(self.DEFAULT_SPEED,
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self.tr('Default speed (km/h)'),
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QgsProcessingParameterNumber.Double,
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5.0, False, 0, 99999999.99))
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params.append(QgsProcessingParameterNumber(self.TOLERANCE,
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self.tr('Topology tolerance'),
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QgsProcessingParameterNumber.Double,
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0.0, False, 0, 99999999.99))
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for p in params:
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p.setFlags(p.flags() | QgsProcessingParameterDefinition.FlagAdvanced)
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self.addParameter(p)
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self.addOutput(OutputVector(self.OUTPUT_LAYER,
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self.tr('Shortest path'),
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datatype=[dataobjects.TYPE_VECTOR_LINE]))
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self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT,
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self.tr('Shortest path'),
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QgsProcessing.TypeVectorLine))
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def name(self):
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return 'shortestpathpointtolayer'
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@ -152,21 +158,19 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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return self.tr('Shortest path (point to layer)')
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def processAlgorithm(self, parameters, context, feedback):
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layer = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.INPUT_VECTOR), context)
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startPoint = self.getParameterValue(self.START_POINT)
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endPoints = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(self.END_POINTS), context)
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strategy = self.getParameterValue(self.STRATEGY)
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layer = self.parameterAsVectorLayer(parameters, self.INPUT, context)
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startPoint = self.parameterAsPoint(parameters, self.START_POINT, context)
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endPoints = self.parameterAsSource(parameters, self.END_POINTS, context)
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strategy = self.parameterAsEnum(parameters, self.STRATEGY, context)
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directionFieldName = self.getParameterValue(self.DIRECTION_FIELD)
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forwardValue = self.getParameterValue(self.VALUE_FORWARD)
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backwardValue = self.getParameterValue(self.VALUE_BACKWARD)
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bothValue = self.getParameterValue(self.VALUE_BOTH)
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defaultDirection = self.getParameterValue(self.DEFAULT_DIRECTION)
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bothValue = self.getParameterValue(self.VALUE_BOTH)
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defaultDirection = self.getParameterValue(self.DEFAULT_DIRECTION)
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speedFieldName = self.getParameterValue(self.SPEED_FIELD)
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defaultSpeed = self.getParameterValue(self.DEFAULT_SPEED)
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tolerance = self.getParameterValue(self.TOLERANCE)
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directionFieldName = self.parameterAsString(parameters, self.DIRECTION_FIELD, context)
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forwardValue = self.parameterAsString(parameters, self.VALUE_FORWARD, context)
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backwardValue = self.parameterAsString(parameters, self.VALUE_BACKWARD, context)
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bothValue = self.parameterAsString(parameters, self.VALUE_BOTH, context)
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defaultDirection = self.parameterAsEnum(parameters, self.DEFAULT_DIRECTION, context)
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speedFieldName = self.parameterAsString(parameters, self.SPEED_FIELD, context)
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defaultSpeed = self.parameterAsDouble(parameters, self.DEFAULT_SPEED, context)
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tolerance = self.parameterAsDouble(parameters, self.TOLERANCE, context)
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fields = QgsFields()
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fields.append(QgsField('start', QVariant.String, '', 254, 0))
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@ -176,17 +180,14 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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feat = QgsFeature()
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feat.setFields(fields)
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writer = self.getOutputFromName(
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self.OUTPUT_LAYER).getVectorWriter(fields, QgsWkbTypes.LineString, layer.crs(), context)
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tmp = startPoint.split(',')
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startPoint = QgsPointXY(float(tmp[0]), float(tmp[1]))
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(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
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fields, QgsWkbTypes.LineString, layer.crs())
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directionField = -1
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if directionFieldName is not None:
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if directionFieldName:
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directionField = layer.fields().lookupField(directionFieldName)
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speedField = -1
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if speedFieldName is not None:
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if speedFieldName:
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speedField = layer.fields().lookupField(speedFieldName)
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director = QgsVectorLayerDirector(layer,
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@ -214,12 +215,16 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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feedback.pushInfo(self.tr('Loading end points...'))
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request = QgsFeatureRequest()
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request.setFlags(request.flags() ^ QgsFeatureRequest.SubsetOfAttributes)
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features = QgsProcessingUtils.getFeatures(endPoints, context, request)
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count = QgsProcessingUtils.featureCount(endPoints, context)
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features = source.getFeatures(request)
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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points = [startPoint]
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for f in features:
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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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points.append(f.geometry().asPoint())
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feedback.setProgress(int(current * total))
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feedback.pushInfo(self.tr('Building graph...'))
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snappedPoints = director.makeGraph(builder, points)
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@ -231,7 +236,7 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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tree, cost = QgsGraphAnalyzer.dijkstra(graph, idxStart, 0)
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route = []
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total = 100.0 / count if count else 1
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total = 100.0 / source.featureCount() if source.featureCount() else 1
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for i in range(1, count + 1):
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idxEnd = graph.findVertex(snappedPoints[i])
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@ -256,10 +261,10 @@ class ShortestPathPointToLayer(QgisAlgorithm):
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feat['start'] = startPoint.toString()
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feat['end'] = points[i].toString()
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feat['cost'] = cost / multiplier
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writer.addFeature(feat, QgsFeatureSink.FastInsert)
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sink.addFeature(feat, QgsFeatureSink.FastInsert)
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route[:] = []
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feedback.setProgress(int(i * total))
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del writer
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return {self.OUTPUT: dest_id}
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