mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-07 00:02:15 -05:00
02bf88c4b7
Improvements - allow different CRS between layers - instead of optionally allowing selection of a single field to keep from both inputs, allow selection of multiple fields
182 lines
7.2 KiB
Python
182 lines
7.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
LinesIntersection.py
|
|
---------------------
|
|
Date : August 2012
|
|
Copyright : (C) 2012 by Victor Olaya
|
|
Email : volayaf at gmail dot com
|
|
***************************************************************************
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
|
|
__author__ = 'Victor Olaya'
|
|
__date__ = 'August 2012'
|
|
__copyright__ = '(C) 2012, Victor Olaya'
|
|
|
|
# This will get replaced with a git SHA1 when you do a git archive
|
|
|
|
__revision__ = '$Format:%H$'
|
|
|
|
import os
|
|
|
|
from qgis.PyQt.QtGui import QIcon
|
|
|
|
from qgis.core import (QgsFeatureRequest, QgsFeature, QgsGeometry,
|
|
QgsFeatureSink,
|
|
QgsWkbTypes,
|
|
QgsFields,
|
|
QgsSpatialIndex,
|
|
QgsProcessing,
|
|
QgsProcessingParameterFeatureSource,
|
|
QgsProcessingParameterField,
|
|
QgsProcessingParameterFeatureSink)
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
from processing.tools import dataobjects, vector
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
|
|
class LinesIntersection(QgisAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
INTERSECT = 'INTERSECT'
|
|
INPUT_FIELDS = 'INPUT_FIELDS'
|
|
INTERSECT_FIELDS = 'INTERSECT_FIELDS'
|
|
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'lines_intersection.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Vector overlay tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
|
|
self.tr('Input layer'), [QgsProcessing.TypeVectorLine]))
|
|
self.addParameter(QgsProcessingParameterFeatureSource(self.INTERSECT,
|
|
self.tr('Intersect layer'), [QgsProcessing.TypeVectorLine]))
|
|
|
|
self.addParameter(QgsProcessingParameterField(
|
|
self.INPUT_FIELDS,
|
|
self.tr('Input fields to keep (leave empty to keep all fields)'),
|
|
parentLayerParameterName=self.INPUT,
|
|
optional=True, allowMultiple=True))
|
|
self.addParameter(QgsProcessingParameterField(
|
|
self.INTERSECT_FIELDS,
|
|
self.tr('Intersect fields to keep (leave empty to keep all fields)'),
|
|
parentLayerParameterName=self.INTERSECT,
|
|
optional=True, allowMultiple=True))
|
|
|
|
self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Intersections'), QgsProcessing.TypeVectorPoint))
|
|
|
|
def name(self):
|
|
return 'lineintersections'
|
|
|
|
def displayName(self):
|
|
return self.tr('Line intersections')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
sourceA = self.parameterAsSource(parameters, self.INPUT, context)
|
|
sourceB = self.parameterAsSource(parameters, self.INTERSECT, context)
|
|
|
|
fieldsA = self.parameterAsFields(parameters, self.INPUT_FIELDS, context)
|
|
fieldsB = self.parameterAsFields(parameters, self.INTERSECT_FIELDS, context)
|
|
|
|
fieldListA = QgsFields()
|
|
field_indices_a = []
|
|
if len(fieldsA) > 0:
|
|
for f in fieldsA:
|
|
idxA = sourceA.fields().lookupField(f)
|
|
if idxA >= 0:
|
|
field_indices_a.append(idxA)
|
|
fieldListA.append(sourceA.fields()[idxA])
|
|
else:
|
|
fieldListA = sourceA.fields()
|
|
field_indices_a = [i for i in range(0, fieldListA.count())]
|
|
|
|
fieldListB = QgsFields()
|
|
field_indices_b = []
|
|
if len(fieldsB) > 0:
|
|
for f in fieldsB:
|
|
idxB = sourceB.fields().lookupField(f)
|
|
if idxB >= 0:
|
|
field_indices_b.append(idxB)
|
|
fieldListB.append(sourceB.fields()[idxB])
|
|
else:
|
|
fieldListB = sourceB.fields()
|
|
field_indices_b = [i for i in range(0, fieldListB.count())]
|
|
|
|
fieldListB = vector.testForUniqueness(fieldListA, fieldListB)
|
|
for b in fieldListB:
|
|
fieldListA.append(b)
|
|
|
|
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
|
|
fieldListA, QgsWkbTypes.Point, sourceA.sourceCrs())
|
|
|
|
spatialIndex = QgsSpatialIndex(sourceB.getFeatures(QgsFeatureRequest().setSubsetOfAttributes([]).setDestinationCrs(sourceA.sourceCrs())), feedback)
|
|
|
|
outFeat = QgsFeature()
|
|
features = sourceA.getFeatures(QgsFeatureRequest().setSubsetOfAttributes(field_indices_a))
|
|
total = 100.0 / sourceA.featureCount() if sourceA.featureCount() else 0
|
|
for current, inFeatA in enumerate(features):
|
|
if feedback.isCanceled():
|
|
break
|
|
|
|
if not inFeatA.hasGeometry():
|
|
continue
|
|
|
|
inGeom = inFeatA.geometry()
|
|
has_intersections = False
|
|
lines = spatialIndex.intersects(inGeom.boundingBox())
|
|
|
|
engine = None
|
|
if len(lines) > 0:
|
|
has_intersections = True
|
|
# use prepared geometries for faster intersection tests
|
|
engine = QgsGeometry.createGeometryEngine(inGeom.geometry())
|
|
engine.prepareGeometry()
|
|
|
|
if has_intersections:
|
|
request = QgsFeatureRequest().setFilterFids(lines)
|
|
request.setDestinationCrs(sourceA.sourceCrs())
|
|
request.setSubsetOfAttributes(field_indices_b)
|
|
|
|
for inFeatB in sourceB.getFeatures(request):
|
|
if feedback.isCanceled():
|
|
break
|
|
|
|
tmpGeom = inFeatB.geometry()
|
|
|
|
points = []
|
|
if engine.intersects(tmpGeom.geometry()):
|
|
tempGeom = inGeom.intersection(tmpGeom)
|
|
out_attributes = [inFeatA.attributes()[i] for i in field_indices_a]
|
|
out_attributes.extend([inFeatB.attributes()[i] for i in field_indices_b])
|
|
if tempGeom.type() == QgsWkbTypes.PointGeometry:
|
|
if tempGeom.isMultipart():
|
|
points = tempGeom.asMultiPoint()
|
|
else:
|
|
points.append(tempGeom.asPoint())
|
|
|
|
for j in points:
|
|
outFeat.setGeometry(tempGeom.fromPoint(j))
|
|
outFeat.setAttributes(out_attributes)
|
|
sink.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
|
|
feedback.setProgress(int(current * total))
|
|
|
|
return {self.OUTPUT: dest_id}
|