def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_LAYER))
writer = self.getOutputFromName(
self.OUTPUT_LAYER).getVectorWriter(
layer.fields().toList(),
QGis.WKBPoint,
layer.crs())
features = vector.features(layer)
total = 100.0 / len(features)
for current, input_feature in enumerate(features):
output_feature = input_feature
if input_feature.constGeometry():
input_geometry = QgsGeometry(input_feature.geometry())
output_geometry = input_geometry.pointOnSurface()
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating point on surface'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
progress.setPercentage(int(current * total))
del writer
def processAlgorithm(self, progress):
layer = dataobjects.getObjectFromUri(
self.getParameterValue(self.INPUT_LAYER))
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
layer.fields().toList(), QGis.WKBPoint, layer.crs())
features = vector.features(layer)
total = 100.0 / len(features)
for current, input_feature in enumerate(features):
output_feature = input_feature
if input_feature.constGeometry():
input_geometry = QgsGeometry(input_feature.geometry())
output_geometry = input_geometry.pointOnSurface()
if not output_geometry:
raise GeoAlgorithmExecutionException(
self.tr('Error calculating point on surface'))
output_feature.setGeometry(output_geometry)
writer.addFeature(output_feature)
progress.setPercentage(int(current * total))
del writer
def in_mask(self, feature, srid=None):
if feature is None: # expression overview
return False
if self.layer is None:
return False
try:
# layer is not None but destroyed ?
self.layer.id()
except:
self.reset_mask_layer()
return False
# mask layer empty due to unloaded memlayersaver plugin > no filtering
if self.layer.featureCount() == 0:
return True
mask_geom, bbox = self.mask_geometry()
geom = QgsGeometry(feature.geometry())
if not geom.isGeosValid():
geom = geom.buffer(0.0, 1)
if geom is None:
return False
if srid is not None and self.layer.crs().postgisSrid() != srid:
src_crs = QgsCoordinateReferenceSystem(srid)
dest_crs = self.layer.crs()
xform = QgsCoordinateTransform(src_crs, dest_crs, QgsProject.instance())
try:
geom.transform(xform)
except:
# transformation error. Check layer projection.
pass
if geom.type() == QgsWkbTypes.PolygonGeometry:
if self.parameters.polygon_mask_method == 2 and not self.has_point_on_surface:
self.parameters.polygon_mask_method = 1
if self.parameters.polygon_mask_method == 0:
# this method can only work when no geometry simplification is involved
return (mask_geom.overlaps(geom) or mask_geom.contains(geom))
elif self.parameters.polygon_mask_method == 1:
# the fastest method, but with possible inaccuracies
pt = geom.vertexAt(0)
return bbox.contains(QgsPointXY(pt)) and mask_geom.contains(geom.centroid())
elif self.parameters.polygon_mask_method == 2:
# will always work
pt = geom.vertexAt(0)
return bbox.contains(QgsPointXY(pt)) and mask_geom.contains(geom.pointOnSurface())
else:
return False
elif geom.type() == QgsWkbTypes.LineGeometry:
if self.parameters.line_mask_method == 0:
return mask_geom.intersects(geom)
elif self.parameters.line_mask_method == 1:
return mask_geom.contains(geom)
else:
return False
elif geom.type() == QgsWkbTypes.PointGeometry:
return mask_geom.intersects(geom)
else:
return False
def in_mask(self, feature, srid=None):
if feature is None: # expression overview
return False
if self.layer is None:
return False
try:
# layer is not None but destroyed ?
self.layer.id()
except:
self.reset_mask_layer()
return False
# mask layer empty due to unloaded memlayersaver plugin > no filtering
if self.layer.featureCount() == 0:
return True
mask_geom, bbox = self.mask_geometry()
geom = QgsGeometry(feature.geometry())
if not geom.isGeosValid():
geom = geom.buffer(0.0, 1)
if geom is None:
return False
if srid is not None and self.layer.crs().postgisSrid() != srid:
src_crs = QgsCoordinateReferenceSystem(srid)
dest_crs = self.layer.crs()
xform = QgsCoordinateTransform(src_crs, dest_crs,
QgsProject.instance())
try:
geom.transform(xform)
except Exception as e:
for m in e.args:
QgsMessageLog.logMessage("in_mask - {}".format(m),
"Extensions")
# transformation error. Check layer projection.
pass
if geom.type() == QgsWkbTypes.PolygonGeometry:
if (self.parameters.polygon_mask_method == 2
and not self.has_point_on_surface):
self.parameters.polygon_mask_method = 1
if self.parameters.polygon_mask_method == 0:
# this method can only work when no geometry simplification is involved
return mask_geom.overlaps(geom) or mask_geom.contains(geom)
elif self.parameters.polygon_mask_method == 1:
# the fastest method, but with possible inaccuracies
pt = geom.vertexAt(0)
return bbox.contains(QgsPointXY(pt)) and mask_geom.contains(
geom.centroid())
elif self.parameters.polygon_mask_method == 2:
# will always work
pt = geom.vertexAt(0)
return bbox.contains(QgsPointXY(pt)) and mask_geom.contains(
geom.pointOnSurface())
else:
return False
elif geom.type() == QgsWkbTypes.LineGeometry:
if self.parameters.line_mask_method == 0:
return mask_geom.intersects(geom)
elif self.parameters.line_mask_method == 1:
return mask_geom.contains(geom)
else:
return False
elif geom.type() == QgsWkbTypes.PointGeometry:
return mask_geom.intersects(geom)
else:
return False
