mirror of
https://github.com/qgis/QGIS.git
synced 2025-04-14 00:07:35 -04:00
1e13d733c2
initAlgorithm() method This allows 2 benefits: - algorithms can be subclassed and have subclasses add additional parameters/outputs to the algorithm. With the previous approach of declaring parameters/outputs in the constructor, it's not possible to call virtual methods to add additional parameters/ outputs (since you can't call virtual methods from a constructor). - initAlgorithm takes a variant map argument, allowing the algorithm to dynamically adjust its declared parameters and outputs according to this configuration map. This potentially allows model algorithms which can be configured to have variable numbers of parameters and outputs at run time. E.g. a "router" algorithm which directs features to one of any number of output sinks depending on some user configured criteria.
248 lines
12 KiB
Python
248 lines
12 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
***************************************************************************
|
|
Union.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,
|
|
QgsFeatureSink,
|
|
QgsGeometry,
|
|
QgsWkbTypes,
|
|
QgsMessageLog,
|
|
QgsProcessingUtils)
|
|
|
|
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
|
|
from processing.core.parameters import ParameterVector
|
|
from processing.core.outputs import OutputVector
|
|
from processing.tools import 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 Union(QgisAlgorithm):
|
|
|
|
INPUT = 'INPUT'
|
|
INPUT2 = 'INPUT2'
|
|
OUTPUT = 'OUTPUT'
|
|
|
|
def icon(self):
|
|
return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'union.png'))
|
|
|
|
def group(self):
|
|
return self.tr('Vector overlay tools')
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
|
|
def initAlgorithm(self, config=None):
|
|
self.addParameter(ParameterVector(Union.INPUT,
|
|
self.tr('Input layer')))
|
|
self.addParameter(ParameterVector(Union.INPUT2,
|
|
self.tr('Input layer 2')))
|
|
self.addOutput(OutputVector(Union.OUTPUT, self.tr('Union')))
|
|
|
|
def name(self):
|
|
return 'union'
|
|
|
|
def displayName(self):
|
|
return self.tr('Union')
|
|
|
|
def processAlgorithm(self, parameters, context, feedback):
|
|
vlayerA = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Union.INPUT), context)
|
|
vlayerB = QgsProcessingUtils.mapLayerFromString(self.getParameterValue(Union.INPUT2), context)
|
|
|
|
geomType = vlayerA.wkbType()
|
|
fields = vector.combineFields(vlayerA.fields(), vlayerB.fields())
|
|
writer = self.getOutputFromName(Union.OUTPUT).getVectorWriter(fields, geomType, vlayerA.crs(), context)
|
|
inFeatA = QgsFeature()
|
|
inFeatB = QgsFeature()
|
|
outFeat = QgsFeature()
|
|
indexA = QgsProcessingUtils.createSpatialIndex(vlayerB, context)
|
|
indexB = QgsProcessingUtils.createSpatialIndex(vlayerA, context)
|
|
|
|
count = 0
|
|
nElement = 0
|
|
featuresA = QgsProcessingUtils.getFeatures(vlayerA, context)
|
|
nFeat = QgsProcessingUtils.featureCount(vlayerA, context)
|
|
for inFeatA in featuresA:
|
|
feedback.setProgress(nElement / float(nFeat) * 50)
|
|
nElement += 1
|
|
lstIntersectingB = []
|
|
geom = inFeatA.geometry()
|
|
atMapA = inFeatA.attributes()
|
|
intersects = indexA.intersects(geom.boundingBox())
|
|
if len(intersects) < 1:
|
|
try:
|
|
outFeat.setGeometry(geom)
|
|
outFeat.setAttributes(atMapA)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
# This really shouldn't happen, as we haven't
|
|
# edited the input geom at all
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
else:
|
|
request = QgsFeatureRequest().setFilterFids(intersects)
|
|
|
|
engine = QgsGeometry.createGeometryEngine(geom.geometry())
|
|
engine.prepareGeometry()
|
|
|
|
for inFeatB in vlayerB.getFeatures(request):
|
|
count += 1
|
|
|
|
atMapB = inFeatB.attributes()
|
|
tmpGeom = inFeatB.geometry()
|
|
|
|
if engine.intersects(tmpGeom.geometry()):
|
|
int_geom = geom.intersection(tmpGeom)
|
|
lstIntersectingB.append(tmpGeom)
|
|
|
|
if not int_geom:
|
|
# There was a problem creating the intersection
|
|
QgsMessageLog.logMessage(self.tr('GEOS geoprocessing error: One or more input features have invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
int_geom = QgsGeometry()
|
|
else:
|
|
int_geom = QgsGeometry(int_geom)
|
|
|
|
if int_geom.wkbType() == QgsWkbTypes.Unknown or QgsWkbTypes.flatType(int_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
|
|
# Intersection produced different geomety types
|
|
temp_list = int_geom.asGeometryCollection()
|
|
for i in temp_list:
|
|
if i.type() == geom.type():
|
|
int_geom = QgsGeometry(i)
|
|
try:
|
|
outFeat.setGeometry(int_geom)
|
|
outFeat.setAttributes(atMapA + atMapB)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
else:
|
|
# Geometry list: prevents writing error
|
|
# in geometries of different types
|
|
# produced by the intersection
|
|
# fix #3549
|
|
if int_geom.wkbType() in wkbTypeGroups[wkbTypeGroups[int_geom.wkbType()]]:
|
|
try:
|
|
outFeat.setGeometry(int_geom)
|
|
outFeat.setAttributes(atMapA + atMapB)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
|
|
# the remaining bit of inFeatA's geometry
|
|
# if there is nothing left, this will just silently fail and we're good
|
|
diff_geom = QgsGeometry(geom)
|
|
if len(lstIntersectingB) != 0:
|
|
intB = QgsGeometry.unaryUnion(lstIntersectingB)
|
|
diff_geom = diff_geom.difference(intB)
|
|
|
|
if diff_geom.wkbType() == 0 or QgsWkbTypes.flatType(diff_geom.geometry().wkbType()) == QgsWkbTypes.GeometryCollection:
|
|
temp_list = diff_geom.asGeometryCollection()
|
|
for i in temp_list:
|
|
if i.type() == geom.type():
|
|
diff_geom = QgsGeometry(i)
|
|
try:
|
|
outFeat.setGeometry(diff_geom)
|
|
outFeat.setAttributes(atMapA)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
|
|
length = len(vlayerA.fields())
|
|
atMapA = [None] * length
|
|
|
|
featuresA = QgsProcessingUtils.getFeatures(vlayerB, context)
|
|
nFeat = QgsProcessingUtils.featureCount(vlayerB, context)
|
|
for inFeatA in featuresA:
|
|
feedback.setProgress(nElement / float(nFeat) * 100)
|
|
add = False
|
|
geom = inFeatA.geometry()
|
|
diff_geom = QgsGeometry(geom)
|
|
atMap = [None] * length
|
|
atMap.extend(inFeatA.attributes())
|
|
intersects = indexB.intersects(geom.boundingBox())
|
|
|
|
if len(intersects) < 1:
|
|
try:
|
|
outFeat.setGeometry(geom)
|
|
outFeat.setAttributes(atMap)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
else:
|
|
request = QgsFeatureRequest().setFilterFids(intersects)
|
|
|
|
# use prepared geometries for faster intersection tests
|
|
engine = QgsGeometry.createGeometryEngine(diff_geom.geometry())
|
|
engine.prepareGeometry()
|
|
|
|
for inFeatB in vlayerA.getFeatures(request):
|
|
atMapB = inFeatB.attributes()
|
|
tmpGeom = inFeatB.geometry()
|
|
|
|
if engine.intersects(tmpGeom.geometry()):
|
|
add = True
|
|
diff_geom = QgsGeometry(diff_geom.difference(tmpGeom))
|
|
else:
|
|
try:
|
|
# Ihis only happens if the bounding box
|
|
# intersects, but the geometry doesn't
|
|
outFeat.setGeometry(diff_geom)
|
|
outFeat.setAttributes(atMap)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
|
|
if add:
|
|
try:
|
|
outFeat.setGeometry(diff_geom)
|
|
outFeat.setAttributes(atMap)
|
|
writer.addFeature(outFeat, QgsFeatureSink.FastInsert)
|
|
except:
|
|
QgsMessageLog.logMessage(self.tr('Feature geometry error: One or more output features ignored due to invalid geometry.'),
|
|
self.tr('Processing'), QgsMessageLog.INFO)
|
|
nElement += 1
|
|
|
|
del writer
|