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5339d62715
Include descriptive text with the specified parameter value in error, and always check that sources were loaded to avoid raw Python exceptions when they are not
266 lines
11 KiB
Python
266 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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RectanglesOvalsDiamondsFixed.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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# This will get replaced with a git SHA1 when you do a git archive323
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__revision__ = '$Format:%H$'
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import math
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from qgis.core import (QgsProcessingParameterFeatureSource,
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QgsProcessingParameterEnum,
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QgsProcessingParameterNumber,
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QgsProcessingParameterFeatureSink,
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QgsProcessingParameterDistance,
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QgsProcessingException,
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QgsFeature,
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QgsFeatureSink,
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QgsGeometry,
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QgsPointXY,
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QgsWkbTypes,
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QgsProcessing)
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from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
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class RectanglesOvalsDiamondsFixed(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 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(QgsProcessingParameterFeatureSource(self.INPUT,
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self.tr('Input layer'),
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[QgsProcessing.TypeVectorPoint]))
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self.addParameter(QgsProcessingParameterEnum(self.SHAPE,
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self.tr('Buffer shape'), options=self.shapes))
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self.addParameter(QgsProcessingParameterDistance(self.WIDTH, self.tr('Width'), parentParameterName=self.INPUT,
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minValue=0.0000001, maxValue=999999999.0, defaultValue=1.0))
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self.addParameter(QgsProcessingParameterDistance(self.HEIGHT, self.tr('Height'), parentParameterName=self.INPUT,
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minValue=0.0000001, maxValue=999999999.0, defaultValue=1.0))
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self.addParameter(QgsProcessingParameterNumber(self.ROTATION, self.tr('Rotation'), type=QgsProcessingParameterNumber.Double,
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minValue=0.0, maxValue=360.0, optional=True))
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self.addParameter(QgsProcessingParameterNumber(self.SEGMENTS,
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self.tr('Number of segments'),
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minValue=1,
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maxValue=999999999,
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defaultValue=36))
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self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT,
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self.tr('Output'),
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type=QgsProcessing.TypeVectorPolygon))
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def name(self):
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return 'rectanglesovalsdiamondsfixed'
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def displayName(self):
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return self.tr('Rectangles, ovals, diamonds (fixed)')
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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(self.invalidSourceError(parameters, self.INPUT))
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shape = self.parameterAsEnum(parameters, self.SHAPE, context)
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width = self.parameterAsDouble(parameters, self.WIDTH, context)
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height = self.parameterAsDouble(parameters, self.HEIGHT, context)
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rotation = self.parameterAsDouble(parameters, self.ROTATION, context)
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segments = self.parameterAsInt(parameters, self.SEGMENTS, context)
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(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
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source.fields(), QgsWkbTypes.Polygon, source.sourceCrs())
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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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return {self.OUTPUT: dest_id}
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def rectangles(self, sink, source, width, height, rotation, feedback):
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features = source.getFeatures()
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ft = QgsFeature()
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xOffset = width / 2.0
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yOffset = height / 2.0
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation is not None:
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phi = rotation * math.pi / 180
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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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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [(-xOffset, -yOffset), (-xOffset, yOffset), (xOffset, yOffset), (xOffset, -yOffset)]
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polygon = [[QgsPointXY(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) 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.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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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [(-xOffset, -yOffset), (-xOffset, yOffset), (xOffset, yOffset), (xOffset, -yOffset)]
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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.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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xOffset = width / 2.0
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yOffset = height / 2.0
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation is not None:
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phi = rotation * math.pi / 180
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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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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [(0.0, -yOffset), (-xOffset, 0.0), (0.0, yOffset), (xOffset, 0.0)]
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polygon = [[QgsPointXY(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) 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.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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point = feat.geometry().asPoint()
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x = point.x()
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y = point.y()
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points = [(0.0, -yOffset), (-xOffset, 0.0), (0.0, yOffset), (xOffset, 0.0)]
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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.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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xOffset = width / 2.0
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yOffset = height / 2.0
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total = 100.0 / source.featureCount() if source.featureCount() else 0
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if rotation is not None:
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phi = rotation * math.pi / 180
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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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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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for t in [(2 * math.pi) / segments * i for i in range(segments)]:
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points.append((xOffset * math.cos(t), yOffset * math.sin(t)))
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polygon = [[QgsPointXY(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) 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.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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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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for t in [(2 * math.pi) / segments * i for i in range(segments)]:
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points.append((xOffset * math.cos(t), yOffset * math.sin(t)))
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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.FastInsert)
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feedback.setProgress(int(current * total))
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