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466 lines
16 KiB
Python
466 lines
16 KiB
Python
"""
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***************************************************************************
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RectanglesOvalsDiamondsVariable.py
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---------------------
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Date : April 2016
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Copyright : (C) 2016 by Alexander Bruy
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Email : alexander dot bruy at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = "Alexander Bruy"
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__date__ = "August 2012"
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__copyright__ = "(C) 2012, Victor Olaya"
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import math
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from qgis.PyQt.QtCore import QCoreApplication
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from qgis.core import (
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NULL,
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QgsWkbTypes,
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QgsFeature,
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QgsFeatureSink,
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QgsGeometry,
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QgsPointXY,
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QgsProcessing,
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QgsProcessingException,
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QgsProcessingAlgorithm,
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QgsProcessingParameterField,
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QgsProcessingParameterFeatureSource,
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QgsProcessingParameterEnum,
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QgsProcessingParameterNumber,
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QgsProcessingParameterFeatureSink,
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)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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class RectanglesOvalsDiamondsVariable(QgisAlgorithm):
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INPUT = "INPUT"
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SHAPE = "SHAPE"
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WIDTH = "WIDTH"
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HEIGHT = "HEIGHT"
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ROTATION = "ROTATION"
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SEGMENTS = "SEGMENTS"
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OUTPUT = "OUTPUT"
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def group(self):
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return self.tr("Vector geometry")
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def groupId(self):
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return "vectorgeometry"
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def __init__(self):
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super().__init__()
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def flags(self):
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return super().flags() | QgsProcessingAlgorithm.Flag.FlagDeprecated
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def initAlgorithm(self, config=None):
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self.shapes = [self.tr("Rectangles"), self.tr("Diamonds"), self.tr("Ovals")]
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self.addParameter(
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QgsProcessingParameterFeatureSource(
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self.INPUT,
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self.tr("Input layer"),
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[QgsProcessing.SourceType.TypeVectorPoint],
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)
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)
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self.addParameter(
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QgsProcessingParameterEnum(
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self.SHAPE, self.tr("Buffer shape"), options=self.shapes
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)
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)
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self.addParameter(
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QgsProcessingParameterField(
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self.WIDTH,
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self.tr("Width field"),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric,
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)
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)
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self.addParameter(
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QgsProcessingParameterField(
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self.HEIGHT,
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self.tr("Height field"),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric,
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)
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)
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self.addParameter(
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QgsProcessingParameterField(
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self.ROTATION,
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self.tr("Rotation field"),
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parentLayerParameterName=self.INPUT,
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type=QgsProcessingParameterField.DataType.Numeric,
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optional=True,
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)
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)
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self.addParameter(
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QgsProcessingParameterNumber(
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self.SEGMENTS,
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self.tr("Number of segments"),
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minValue=1,
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defaultValue=36,
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)
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)
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self.addParameter(
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QgsProcessingParameterFeatureSink(
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self.OUTPUT,
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self.tr("Output"),
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type=QgsProcessing.SourceType.TypeVectorPolygon,
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)
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)
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def name(self):
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return "rectanglesovalsdiamondsvariable"
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def displayName(self):
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return self.tr("Rectangles, ovals, diamonds (variable)")
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def processAlgorithm(self, parameters, context, feedback):
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source = self.parameterAsSource(parameters, self.INPUT, context)
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if source is None:
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raise QgsProcessingException(
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self.invalidSourceError(parameters, self.INPUT)
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)
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shape = self.parameterAsEnum(parameters, self.SHAPE, context)
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width_field = self.parameterAsString(parameters, self.WIDTH, context)
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height_field = self.parameterAsString(parameters, self.HEIGHT, context)
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rotation_field = self.parameterAsString(parameters, self.ROTATION, context)
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segments = self.parameterAsInt(parameters, self.SEGMENTS, context)
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(sink, dest_id) = self.parameterAsSink(
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parameters,
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self.OUTPUT,
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context,
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source.fields(),
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QgsWkbTypes.Type.Polygon,
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source.sourceCrs(),
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)
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if sink is None:
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raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
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width = source.fields().lookupField(width_field)
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height = source.fields().lookupField(height_field)
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rotation = source.fields().lookupField(rotation_field)
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if shape == 0:
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self.rectangles(sink, source, width, height, rotation, feedback)
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elif shape == 1:
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self.diamonds(sink, source, width, height, rotation, feedback)
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else:
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self.ovals(sink, source, width, height, rotation, segments, feedback)
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sink.finalize()
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return {self.OUTPUT: dest_id}
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def rectangles(self, sink, source, width, height, rotation, feedback):
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ft = QgsFeature()
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features = source.getFeatures()
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation >= 0:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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angle = feat[rotation]
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# block 0/NULL width or height, but allow 0 as angle value
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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if angle is NULL:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "angle. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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phi = angle * math.pi / 180
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(-xOffset, -yOffset),
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(-xOffset, yOffset),
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(xOffset, yOffset),
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(xOffset, -yOffset),
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]
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polygon = [
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[
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QgsPointXY(
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i[0] * math.cos(phi) + i[1] * math.sin(phi) + x,
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-i[0] * math.sin(phi) + i[1] * math.cos(phi) + y,
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)
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for i in points
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]
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]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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else:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(-xOffset, -yOffset),
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(-xOffset, yOffset),
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(xOffset, yOffset),
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(xOffset, -yOffset),
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]
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polygon = [[QgsPointXY(i[0] + x, i[1] + y) for i in points]]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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def diamonds(self, sink, source, width, height, rotation, feedback):
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features = source.getFeatures()
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ft = QgsFeature()
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation >= 0:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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angle = feat[rotation]
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# block 0/NULL width or height, but allow 0 as angle value
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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if angle is NULL:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "angle. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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phi = angle * math.pi / 180
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(0.0, -yOffset),
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(-xOffset, 0.0),
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(0.0, yOffset),
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(xOffset, 0.0),
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]
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polygon = [
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[
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QgsPointXY(
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i[0] * math.cos(phi) + i[1] * math.sin(phi) + x,
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-i[0] * math.sin(phi) + i[1] * math.cos(phi) + y,
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)
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for i in points
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]
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]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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else:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(0.0, -yOffset),
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(-xOffset, 0.0),
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(0.0, yOffset),
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(xOffset, 0.0),
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]
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polygon = [[QgsPointXY(i[0] + x, i[1] + y) for i in points]]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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def ovals(self, sink, source, width, height, rotation, segments, feedback):
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features = source.getFeatures()
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ft = QgsFeature()
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation >= 0:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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angle = feat[rotation]
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# block 0/NULL width or height, but allow 0 as angle value
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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if angle == NULL:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "angle. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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phi = angle * math.pi / 180
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(xOffset * math.cos(t), yOffset * math.sin(t))
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for t in [(2 * math.pi) / segments * i for i in range(segments)]
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]
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polygon = [
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[
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QgsPointXY(
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i[0] * math.cos(phi) + i[1] * math.sin(phi) + x,
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-i[0] * math.sin(phi) + i[1] * math.cos(phi) + y,
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)
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for i in points
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]
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]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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else:
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for current, feat in enumerate(features):
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if feedback.isCanceled():
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break
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if not feat.hasGeometry():
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continue
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w = feat[width]
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h = feat[height]
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if not w or not h:
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feedback.pushInfo(
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QCoreApplication.translate(
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"RectanglesOvalsDiamondsVariable",
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"Feature {} has empty " "width or height. " "Skipping…",
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).format(feat.id())
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)
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continue
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xOffset = w / 2.0
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yOffset = h / 2.0
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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [
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(xOffset * math.cos(t), yOffset * math.sin(t))
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for t in [(2 * math.pi) / segments * i for i in range(segments)]
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]
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polygon = [[QgsPointXY(i[0] + x, i[1] + y) for i in points]]
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ft.setGeometry(QgsGeometry.fromPolygonXY(polygon))
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ft.setAttributes(feat.attributes())
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sink.addFeature(ft, QgsFeatureSink.Flag.FastInsert)
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feedback.setProgress(int(current * total))
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