mirror of
https://github.com/qgis/QGIS.git
synced 2025-04-05 00:05:32 -04:00
af0d68b882
Faster than QgsGeometry::isGeosEmpty() because it avoids the conversion to GEOS geometries and just uses the QgsAbstractGeometry subclasses directly. Also implements faster isEmpty() overrides for specific QgsAbstractGeometry subclasses.
129 lines
5.9 KiB
Python
129 lines
5.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Intersection.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. *
|
|
* *
|
|
***************************************************************************
|
|
"""
|
|
from builtins import next
|
|
|
|
__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 Qgis, QgsFeatureRequest, QgsFeature, QgsGeometry, QgsWkbTypes, QgsWkbTypes
|
|
|
|
from processing.core.GeoAlgorithm import GeoAlgorithm
|
|
from processing.core.ProcessingLog import ProcessingLog
|
|
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import dataobjects, vector
|
|
|
|
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
|
|
|
|
wkbTypeGroups = {
|
|
'Point': (QgsWkbTypes.Point, QgsWkbTypes.MultiPoint, QgsWkbTypes.Point25D, QgsWkbTypes.MultiPoint25D,),
|
|
'LineString': (QgsWkbTypes.LineString, QgsWkbTypes.MultiLineString, QgsWkbTypes.LineString25D, QgsWkbTypes.MultiLineString25D,),
|
|
'Polygon': (QgsWkbTypes.Polygon, QgsWkbTypes.MultiPolygon, QgsWkbTypes.Polygon25D, QgsWkbTypes.MultiPolygon25D,),
|
|
}
|
|
for key, value in list(wkbTypeGroups.items()):
|
|
for const in value:
|
|
wkbTypeGroups[const] = key
|
|
|
|
|
|
class Intersection(GeoAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
INPUT2 = 'INPUT2'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def getIcon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'intersect.png'))
|
|
|
|
def defineCharacteristics(self):
|
|
self.name, self.i18n_name = self.trAlgorithm('Intersection')
|
|
self.group, self.i18n_group = self.trAlgorithm('Vector overlay tools')
|
|
self.addParameter(ParameterVector(self.INPUT,
|
|
self.tr('Input layer')))
|
|
self.addParameter(ParameterVector(self.INPUT2,
|
|
self.tr('Intersect layer')))
|
|
self.addOutput(OutputVector(self.OUTPUT, self.tr('Intersection')))
|
|
|
|
def processAlgorithm(self, feedback):
|
|
vlayerA = dataobjects.getObjectFromUri(
|
|
self.getParameterValue(self.INPUT))
|
|
vlayerB = dataobjects.getObjectFromUri(
|
|
self.getParameterValue(self.INPUT2))
|
|
|
|
geomType = QgsWkbTypes.multiType(vlayerA.wkbType())
|
|
fields = vector.combineVectorFields(vlayerA, vlayerB)
|
|
writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
|
|
geomType, vlayerA.crs())
|
|
outFeat = QgsFeature()
|
|
index = vector.spatialindex(vlayerB)
|
|
selectionA = vector.features(vlayerA)
|
|
total = 100.0 / len(selectionA)
|
|
for current, inFeatA in enumerate(selectionA):
|
|
feedback.setProgress(int(current * total))
|
|
geom = inFeatA.geometry()
|
|
atMapA = inFeatA.attributes()
|
|
intersects = index.intersects(geom.boundingBox())
|
|
request = QgsFeatureRequest().setFilterFids(intersects)
|
|
|
|
engine = None
|
|
if len(intersects) > 0:
|
|
# use prepared geometries for faster intersection tests
|
|
engine = QgsGeometry.createGeometryEngine(geom.geometry())
|
|
engine.prepareGeometry()
|
|
|
|
for inFeatB in vlayerB.getFeatures(request):
|
|
tmpGeom = inFeatB.geometry()
|
|
if engine.intersects(tmpGeom.geometry()):
|
|
atMapB = inFeatB.attributes()
|
|
int_geom = QgsGeometry(geom.intersection(tmpGeom))
|
|
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
|
|
int_com = geom.combine(tmpGeom)
|
|
int_geom = QgsGeometry()
|
|
if int_com:
|
|
int_sym = geom.symDifference(tmpGeom)
|
|
int_geom = QgsGeometry(int_com.difference(int_sym))
|
|
if int_geom.isEmpty() or not int_geom.isGeosValid():
|
|
ProcessingLog.addToLog(ProcessingLog.LOG_ERROR,
|
|
self.tr('GEOS geoprocessing error: One or '
|
|
'more input features have invalid '
|
|
'geometry.'))
|
|
try:
|
|
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
|
|
outFeat.setGeometry(int_geom)
|
|
attrs = []
|
|
attrs.extend(atMapA)
|
|
attrs.extend(atMapB)
|
|
outFeat.setAttributes(attrs)
|
|
writer.addFeature(outFeat)
|
|
except:
|
|
ProcessingLog.addToLog(ProcessingLog.LOG_INFO,
|
|
self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'))
|
|
continue
|
|
|
|
del writer
|