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test_qgsgeometry.py
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test_qgsgeometry.py
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# -*- coding: utf-8 -*-
"""QGIS Unit tests for QgsGeometry.
.. note:: 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__ = 'Tim Sutton'
__date__ = '20/08/2012'
__copyright__ = 'Copyright 2012, The QGIS Project'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
import csv
import math
from qgis.core import (
QgsGeometry,
QgsVectorLayer,
QgsFeature,
QgsPoint,
QgsPointV2,
QgsCircularString,
QgsCompoundCurve,
QgsCurvePolygon,
QgsGeometryCollection,
QgsLineString,
QgsMultiCurve,
QgsMultiLineString,
QgsMultiPointV2,
QgsMultiPolygonV2,
QgsMultiSurface,
QgsPolygonV2,
QgsCoordinateTransform,
QgsRectangle,
QgsWkbTypes,
Qgis
)
from qgis.testing import (
start_app,
unittest,
)
from utilities import(
compareWkt,
doubleNear,
unitTestDataPath,
writeShape
)
# Convenience instances in case you may need them not used in this test
start_app()
TEST_DATA_DIR = unitTestDataPath()
class TestQgsGeometry(unittest.TestCase):
def testBool(self):
""" Test boolean evaluation of QgsGeometry """
g = QgsGeometry()
self.assertFalse(g)
myWKT = 'Point (10 10)'
g = QgsGeometry.fromWkt(myWKT)
self.assertTrue(g)
g.setGeometry(None)
self.assertFalse(g)
def testWktPointLoading(self):
myWKT = 'Point (10 10)'
myGeometry = QgsGeometry.fromWkt(myWKT)
self.assertEqual(myGeometry.wkbType(), QgsWkbTypes.Point)
def testWktMultiPointLoading(self):
# Standard format
wkt = 'MultiPoint ((10 15),(20 30))'
geom = QgsGeometry.fromWkt(wkt)
self.assertEqual(geom.wkbType(), QgsWkbTypes.MultiPoint, ('Expected:\n%s\nGot:\n%s\n' % (QgsWkbTypes.Point, geom.type())))
self.assertEqual(geom.geometry().numGeometries(), 2)
self.assertEqual(geom.geometry().geometryN(0).x(), 10)
self.assertEqual(geom.geometry().geometryN(0).y(), 15)
self.assertEqual(geom.geometry().geometryN(1).x(), 20)
self.assertEqual(geom.geometry().geometryN(1).y(), 30)
# Check MS SQL format
wkt = 'MultiPoint (11 16, 21 31)'
geom = QgsGeometry.fromWkt(wkt)
self.assertEqual(geom.wkbType(), QgsWkbTypes.MultiPoint, ('Expected:\n%s\nGot:\n%s\n' % (QgsWkbTypes.Point, geom.type())))
self.assertEqual(geom.geometry().numGeometries(), 2)
self.assertEqual(geom.geometry().geometryN(0).x(), 11)
self.assertEqual(geom.geometry().geometryN(0).y(), 16)
self.assertEqual(geom.geometry().geometryN(1).x(), 21)
self.assertEqual(geom.geometry().geometryN(1).y(), 31)
def testFromPoint(self):
myPoint = QgsGeometry.fromPoint(QgsPoint(10, 10))
self.assertEqual(myPoint.wkbType(), QgsWkbTypes.Point)
def testFromMultiPoint(self):
myMultiPoint = QgsGeometry.fromMultiPoint([
(QgsPoint(0, 0)), (QgsPoint(1, 1))])
self.assertEqual(myMultiPoint.wkbType(), QgsWkbTypes.MultiPoint)
def testFromLine(self):
myLine = QgsGeometry.fromPolyline([QgsPoint(1, 1), QgsPoint(2, 2)])
self.assertEqual(myLine.wkbType(), QgsWkbTypes.LineString)
def testFromMultiLine(self):
myMultiPolyline = QgsGeometry.fromMultiPolyline(
[[QgsPoint(0, 0), QgsPoint(1, 1)], [QgsPoint(0, 1), QgsPoint(2, 1)]])
self.assertEqual(myMultiPolyline.wkbType(), QgsWkbTypes.MultiLineString)
def testFromPolygon(self):
myPolygon = QgsGeometry.fromPolygon(
[[QgsPoint(1, 1), QgsPoint(2, 2), QgsPoint(1, 2), QgsPoint(1, 1)]])
self.assertEqual(myPolygon.wkbType(), QgsWkbTypes.Polygon)
def testFromMultiPolygon(self):
myMultiPolygon = QgsGeometry.fromMultiPolygon([
[[QgsPoint(1, 1),
QgsPoint(2, 2),
QgsPoint(1, 2),
QgsPoint(1, 1)]],
[[QgsPoint(2, 2),
QgsPoint(3, 3),
QgsPoint(3, 1),
QgsPoint(2, 2)]]
])
self.assertEqual(myMultiPolygon.wkbType(), QgsWkbTypes.MultiPolygon)
def testReferenceGeometry(self):
""" Test parsing a whole range of valid reference wkt formats and variants, and checking
expected values such as length, area, centroids, bounding boxes, etc of the resultant geometry.
Note the bulk of this test data was taken from the PostGIS WKT test data """
with open(os.path.join(TEST_DATA_DIR, 'geom_data.csv'), 'r') as f:
reader = csv.DictReader(f)
for i, row in enumerate(reader):
# test that geometry can be created from WKT
geom = QgsGeometry.fromWkt(row['wkt'])
if row['valid_wkt']:
assert geom, "WKT conversion {} failed: could not create geom:\n{}\n".format(i + 1, row['wkt'])
else:
assert not geom, "Corrupt WKT {} was incorrectly converted to geometry:\n{}\n".format(i + 1, row['wkt'])
continue
# test exporting to WKT results in expected string
result = geom.exportToWkt()
exp = row['valid_wkt']
assert compareWkt(result, exp, 0.000001), "WKT conversion {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test num points in geometry
exp_nodes = int(row['num_points'])
self.assertEqual(geom.geometry().nCoordinates(), exp_nodes, "Node count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_nodes, geom.geometry().nCoordinates()))
# test num geometries in collections
exp_geometries = int(row['num_geometries'])
try:
self.assertEqual(geom.geometry().numGeometries(), exp_geometries, "Geometry count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_geometries, geom.geometry().numGeometries()))
except:
# some geometry types don't have numGeometries()
assert exp_geometries <= 1, "Geometry count {}: Expected:\n{} geometries but could not call numGeometries()\n".format(i + 1, exp_geometries)
# test count of rings
exp_rings = int(row['num_rings'])
try:
self.assertEqual(geom.geometry().numInteriorRings(), exp_rings, "Ring count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_rings, geom.geometry().numInteriorRings()))
except:
# some geometry types don't have numInteriorRings()
assert exp_rings <= 1, "Ring count {}: Expected:\n{} rings but could not call numInteriorRings()\n{}".format(i + 1, exp_rings, geom.geometry())
# test isClosed
exp = (row['is_closed'] == '1')
try:
self.assertEqual(geom.geometry().isClosed(), exp, "isClosed {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, True, geom.geometry().isClosed()))
except:
# some geometry types don't have isClosed()
assert not exp, "isClosed {}: Expected:\n isClosed() but could not call isClosed()\n".format(i + 1)
# test geometry centroid
exp = row['centroid']
result = geom.centroid().exportToWkt()
assert compareWkt(result, exp, 0.00001), "Centroid {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test bounding box limits
bbox = geom.geometry().boundingBox()
exp = float(row['x_min'])
result = bbox.xMinimum()
assert doubleNear(result, exp), "Min X {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
exp = float(row['y_min'])
result = bbox.yMinimum()
assert doubleNear(result, exp), "Min Y {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
exp = float(row['x_max'])
result = bbox.xMaximum()
assert doubleNear(result, exp), "Max X {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
exp = float(row['y_max'])
result = bbox.yMaximum()
assert doubleNear(result, exp), "Max Y {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test area calculation
exp = float(row['area'])
result = geom.geometry().area()
assert doubleNear(result, exp), "Area {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test length calculation
exp = float(row['length'])
result = geom.geometry().length()
assert doubleNear(result, exp, 0.00001), "Length {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test perimeter calculation
exp = float(row['perimeter'])
result = geom.geometry().perimeter()
assert doubleNear(result, exp, 0.00001), "Perimeter {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
def testIntersection(self):
myLine = QgsGeometry.fromPolyline([
QgsPoint(0, 0),
QgsPoint(1, 1),
QgsPoint(2, 2)])
myPoint = QgsGeometry.fromPoint(QgsPoint(1, 1))
intersectionGeom = QgsGeometry.intersection(myLine, myPoint)
self.assertEqual(intersectionGeom.wkbType(), QgsWkbTypes.Point)
layer = QgsVectorLayer("Point", "intersection", "memory")
assert layer.isValid(), "Failed to create valid point memory layer"
provider = layer.dataProvider()
ft = QgsFeature()
ft.setGeometry(intersectionGeom)
provider.addFeatures([ft])
self.assertEqual(layer.featureCount(), 1)
def testBuffer(self):
myPoint = QgsGeometry.fromPoint(QgsPoint(1, 1))
bufferGeom = myPoint.buffer(10, 5)
self.assertEqual(bufferGeom.wkbType(), QgsWkbTypes.Polygon)
myTestPoint = QgsGeometry.fromPoint(QgsPoint(3, 3))
self.assertTrue(bufferGeom.intersects(myTestPoint))
def testContains(self):
myPoly = QgsGeometry.fromPolygon(
[[QgsPoint(0, 0),
QgsPoint(2, 0),
QgsPoint(2, 2),
QgsPoint(0, 2),
QgsPoint(0, 0)]])
myPoint = QgsGeometry.fromPoint(QgsPoint(1, 1))
self.assertTrue(QgsGeometry.contains(myPoly, myPoint))
def testTouches(self):
myLine = QgsGeometry.fromPolyline([
QgsPoint(0, 0),
QgsPoint(1, 1),
QgsPoint(2, 2)])
myPoly = QgsGeometry.fromPolygon([[
QgsPoint(0, 0),
QgsPoint(1, 1),
QgsPoint(2, 0),
QgsPoint(0, 0)]])
touchesGeom = QgsGeometry.touches(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", touchesGeom))
assert touchesGeom, myMessage
def testOverlaps(self):
myPolyA = QgsGeometry.fromPolygon([[
QgsPoint(0, 0),
QgsPoint(1, 3),
QgsPoint(2, 0),
QgsPoint(0, 0)]])
myPolyB = QgsGeometry.fromPolygon([[
QgsPoint(0, 0),
QgsPoint(2, 0),
QgsPoint(2, 2),
QgsPoint(0, 2),
QgsPoint(0, 0)]])
overlapsGeom = QgsGeometry.overlaps(myPolyA, myPolyB)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", overlapsGeom))
assert overlapsGeom, myMessage
def testWithin(self):
myLine = QgsGeometry.fromPolyline([
QgsPoint(0.5, 0.5),
QgsPoint(1, 1),
QgsPoint(1.5, 1.5)
])
myPoly = QgsGeometry.fromPolygon([[
QgsPoint(0, 0),
QgsPoint(2, 0),
QgsPoint(2, 2),
QgsPoint(0, 2),
QgsPoint(0, 0)]])
withinGeom = QgsGeometry.within(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", withinGeom))
assert withinGeom, myMessage
def testEquals(self):
myPointA = QgsGeometry.fromPoint(QgsPoint(1, 1))
myPointB = QgsGeometry.fromPoint(QgsPoint(1, 1))
equalsGeom = QgsGeometry.equals(myPointA, myPointB)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", equalsGeom))
assert equalsGeom, myMessage
def testCrosses(self):
myLine = QgsGeometry.fromPolyline([
QgsPoint(0, 0),
QgsPoint(1, 1),
QgsPoint(3, 3)])
myPoly = QgsGeometry.fromPolygon([[
QgsPoint(1, 0),
QgsPoint(2, 0),
QgsPoint(2, 2),
QgsPoint(1, 2),
QgsPoint(1, 0)]])
crossesGeom = QgsGeometry.crosses(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", crossesGeom))
assert crossesGeom, myMessage
def testSimplifyIssue4189(self):
"""Test we can simplify a complex geometry.
Note: there is a ticket related to this issue here:
http://hub.qgis.org/issues/4189
Backstory: Ole Nielson pointed out an issue to me
(Tim Sutton) where simplify ftools was dropping
features. This test replicates that issues.
Interestingly we could replicate the issue in PostGIS too:
- doing straight simplify returned no feature
- transforming to UTM49, then simplify with e.g. 200 threshold is ok
- as above with 500 threshold drops the feature
pgsql2shp -f /tmp/dissolve500.shp gis 'select *,
transform(simplify(transform(geom,32649),500), 4326) as
simplegeom from dissolve;'
"""
with open(os.path.join(unitTestDataPath('wkt'), 'simplify_error.wkt'), 'rt') as myWKTFile:
myWKT = myWKTFile.readline()
# print myWKT
myGeometry = QgsGeometry().fromWkt(myWKT)
assert myGeometry is not None
myStartLength = len(myWKT)
myTolerance = 0.00001
mySimpleGeometry = myGeometry.simplify(myTolerance)
myEndLength = len(mySimpleGeometry.exportToWkt())
myMessage = 'Before simplify: %i\nAfter simplify: %i\n : Tolerance %e' % (
myStartLength, myEndLength, myTolerance)
myMinimumLength = len('Polygon(())')
assert myEndLength > myMinimumLength, myMessage
def testClipping(self):
"""Test that we can clip geometries using other geometries."""
myMemoryLayer = QgsVectorLayer(
('LineString?crs=epsg:4326&field=name:string(20)&index=yes'),
'clip-in',
'memory')
assert myMemoryLayer is not None, 'Provider not initialized'
myProvider = myMemoryLayer.dataProvider()
assert myProvider is not None
myFeature1 = QgsFeature()
myFeature1.setGeometry(QgsGeometry.fromPolyline([
QgsPoint(10, 10),
QgsPoint(20, 10),
QgsPoint(30, 10),
QgsPoint(40, 10),
]))
myFeature1.setAttributes(['Johny'])
myFeature2 = QgsFeature()
myFeature2.setGeometry(QgsGeometry.fromPolyline([
QgsPoint(10, 10),
QgsPoint(20, 20),
QgsPoint(30, 30),
QgsPoint(40, 40),
]))
myFeature2.setAttributes(['Be'])
myFeature3 = QgsFeature()
myFeature3.setGeometry(QgsGeometry.fromPolyline([
QgsPoint(10, 10),
QgsPoint(10, 20),
QgsPoint(10, 30),
QgsPoint(10, 40),
]))
myFeature3.setAttributes(['Good'])
myResult, myFeatures = myProvider.addFeatures(
[myFeature1, myFeature2, myFeature3])
assert myResult
self.assertEqual(len(myFeatures), 3)
myClipPolygon = QgsGeometry.fromPolygon([[
QgsPoint(20, 20),
QgsPoint(20, 30),
QgsPoint(30, 30),
QgsPoint(30, 20),
QgsPoint(20, 20),
]])
print(('Clip: %s' % myClipPolygon.exportToWkt()))
writeShape(myMemoryLayer, 'clipGeometryBefore.shp')
fit = myProvider.getFeatures()
myFeatures = []
myFeature = QgsFeature()
while fit.nextFeature(myFeature):
myGeometry = myFeature.geometry()
if myGeometry.intersects(myClipPolygon):
# Adds nodes where the clip and the line intersec
myCombinedGeometry = myGeometry.combine(myClipPolygon)
# Gives you the areas inside the clip
mySymmetricalGeometry = myGeometry.symDifference(
myCombinedGeometry)
# Gives you areas outside the clip area
# myDifferenceGeometry = myCombinedGeometry.difference(
# myClipPolygon)
# print 'Original: %s' % myGeometry.exportToWkt()
# print 'Combined: %s' % myCombinedGeometry.exportToWkt()
# print 'Difference: %s' % myDifferenceGeometry.exportToWkt()
print(('Symmetrical: %s' % mySymmetricalGeometry.exportToWkt()))
myExpectedWkt = 'Polygon ((20 20, 20 30, 30 30, 30 20, 20 20))'
# There should only be one feature that intersects this clip
# poly so this assertion should work.
assert compareWkt(myExpectedWkt,
mySymmetricalGeometry.exportToWkt())
myNewFeature = QgsFeature()
myNewFeature.setAttributes(myFeature.attributes())
myNewFeature.setGeometry(mySymmetricalGeometry)
myFeatures.append(myNewFeature)
myNewMemoryLayer = QgsVectorLayer(
('LineString?crs=epsg:4326&field=name:string(20)&index=yes'),
'clip-out',
'memory')
myNewProvider = myNewMemoryLayer.dataProvider()
myResult, myFeatures = myNewProvider.addFeatures(myFeatures)
self.assertTrue(myResult)
self.assertEqual(len(myFeatures), 1)
writeShape(myNewMemoryLayer, 'clipGeometryAfter.shp')
def testClosestVertex(self):
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4 !
# |
# 1-+-+-+-+-0 !
polyline = QgsGeometry.fromPolyline(
[QgsPoint(5, 0), QgsPoint(0, 0), QgsPoint(0, 4), QgsPoint(5, 4), QgsPoint(5, 1), QgsPoint(1, 1), QgsPoint(1, 3), QgsPoint(4, 3), QgsPoint(4, 2), QgsPoint(2, 2)]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPoint(6, 1))
self.assertEqual(point, QgsPoint(5, 1))
self.assertEqual(beforeVertex, 3)
self.assertEqual(atVertex, 4)
self.assertEqual(afterVertex, 5)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex) = polyline.closestSegmentWithContext(QgsPoint(6, 2))
self.assertEqual(dist, 1)
self.assertEqual(minDistPoint, QgsPoint(5, 2))
self.assertEqual(afterVertex, 4)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPoint(6, 0))
self.assertEqual(point, QgsPoint(5, 0))
self.assertEqual(beforeVertex, -1)
self.assertEqual(atVertex, 0)
self.assertEqual(afterVertex, 1)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex) = polyline.closestSegmentWithContext(QgsPoint(6, 0))
self.assertEqual(dist, 1)
self.assertEqual(minDistPoint, QgsPoint(5, 0))
self.assertEqual(afterVertex, 1)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPoint(0, -1))
self.assertEqual(point, QgsPoint(0, 0))
self.assertEqual(beforeVertex, 0)
self.assertEqual(atVertex, 1)
self.assertEqual(afterVertex, 2)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex) = polyline.closestSegmentWithContext(QgsPoint(0, 1))
self.assertEqual(dist, 0)
self.assertEqual(minDistPoint, QgsPoint(0, 1))
self.assertEqual(afterVertex, 2)
# 2-3 6-+-7 !
# | | | |
# 0-1 4 5 8-9
polyline = QgsGeometry.fromMultiPolyline(
[
[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 0), ],
[QgsPoint(3, 0), QgsPoint(3, 1), QgsPoint(5, 1), QgsPoint(5, 0), QgsPoint(6, 0), ]
]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPoint(5, 2))
self.assertEqual(point, QgsPoint(5, 1))
self.assertEqual(beforeVertex, 6)
self.assertEqual(atVertex, 7)
self.assertEqual(afterVertex, 8)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex) = polyline.closestSegmentWithContext(QgsPoint(7, 0))
self.assertEqual(dist, 1)
self.assertEqual(minDistPoint, QgsPoint(6, 0))
self.assertEqual(afterVertex, 9)
# 5---4
# |! |
# | 2-3
# | |
# 0-1
polygon = QgsGeometry.fromPolygon(
[[
QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0),
]]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polygon.closestVertex(QgsPoint(0.7, 1.1))
self.assertEqual(point, QgsPoint(1, 1))
self.assertEqual(beforeVertex, 1)
self.assertEqual(atVertex, 2)
self.assertEqual(afterVertex, 3)
assert abs(dist - 0.1) < 0.00001, "Expected: %f; Got:%f" % (dist, 0.1)
(dist, minDistPoint, afterVertex) = polygon.closestSegmentWithContext(QgsPoint(0.7, 1.1))
self.assertEqual(afterVertex, 2)
self.assertEqual(minDistPoint, QgsPoint(1, 1))
exp = 0.3 ** 2 + 0.1 ** 2
assert abs(dist - exp) < 0.00001, "Expected: %f; Got:%f" % (exp, dist)
# 3-+-+-2
# | |
# + 8-7 +
# | |!| |
# + 5-6 +
# | |
# 0-+-+-1
polygon = QgsGeometry.fromPolygon(
[
[QgsPoint(0, 0), QgsPoint(3, 0), QgsPoint(3, 3), QgsPoint(0, 3), QgsPoint(0, 0)],
[QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(1, 2), QgsPoint(1, 1)],
]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polygon.closestVertex(QgsPoint(1.1, 1.9))
self.assertEqual(point, QgsPoint(1, 2))
self.assertEqual(beforeVertex, 7)
self.assertEqual(atVertex, 8)
self.assertEqual(afterVertex, 9)
assert abs(dist - 0.02) < 0.00001, "Expected: %f; Got:%f" % (dist, 0.02)
(dist, minDistPoint, afterVertex) = polygon.closestSegmentWithContext(QgsPoint(1.2, 1.9))
self.assertEqual(afterVertex, 8)
self.assertEqual(minDistPoint, QgsPoint(1.2, 2))
exp = 0.01
assert abs(dist - exp) < 0.00001, "Expected: %f; Got:%f" % (exp, dist)
# 5-+-4 0-+-9
# | | | |
# 6 2-3 1-2!+
# | | | |
# 0-1 7-8
polygon = QgsGeometry.fromMultiPolygon(
[
[[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0), ]],
[[QgsPoint(4, 0), QgsPoint(5, 0), QgsPoint(5, 2), QgsPoint(3, 2), QgsPoint(3, 1), QgsPoint(4, 1), QgsPoint(4, 0), ]]
]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polygon.closestVertex(QgsPoint(4.1, 1.1))
self.assertEqual(point, QgsPoint(4, 1))
self.assertEqual(beforeVertex, 11)
self.assertEqual(atVertex, 12)
self.assertEqual(afterVertex, 13)
assert abs(dist - 0.02) < 0.00001, "Expected: %f; Got:%f" % (dist, 0.02)
(dist, minDistPoint, afterVertex) = polygon.closestSegmentWithContext(QgsPoint(4.1, 1.1))
self.assertEqual(afterVertex, 12)
self.assertEqual(minDistPoint, QgsPoint(4, 1))
exp = 0.02
assert abs(dist - exp) < 0.00001, "Expected: %f; Got:%f" % (exp, dist)
def testAdjacentVertex(self):
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4 !
# |
# 1-+-+-+-+-0 !
polyline = QgsGeometry.fromPolyline(
[QgsPoint(5, 0), QgsPoint(0, 0), QgsPoint(0, 4), QgsPoint(5, 4), QgsPoint(5, 1), QgsPoint(1, 1), QgsPoint(1, 3), QgsPoint(4, 3), QgsPoint(4, 2), QgsPoint(2, 2)]
)
# don't crash
(before, after) = polyline.adjacentVertices(-100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
for i in range(0, 10):
(before, after) = polyline.adjacentVertices(i)
if i == 0:
self.assertEqual(before == -1 and after, 1, "Expected (0,1), Got:(%d,%d)" % (before, after))
elif i == 9:
self.assertEqual(before == i - 1 and after, -1, "Expected (0,1), Got:(%d,%d)" % (before, after))
else:
self.assertEqual(before == i - 1 and after, i + 1, "Expected (0,1), Got:(%d,%d)" % (before, after))
(before, after) = polyline.adjacentVertices(100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
# 2-3 6-+-7
# | | | |
# 0-1 4 5 8-9
polyline = QgsGeometry.fromMultiPolyline(
[
[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 0), ],
[QgsPoint(3, 0), QgsPoint(3, 1), QgsPoint(5, 1), QgsPoint(5, 0), QgsPoint(6, 0), ]
]
)
(before, after) = polyline.adjacentVertices(-100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
for i in range(0, 10):
(before, after) = polyline.adjacentVertices(i)
if i == 0 or i == 5:
self.assertEqual(before == -1 and after, i + 1, "Expected (-1,%d), Got:(%d,%d)" % (i + 1, before, after))
elif i == 4 or i == 9:
self.assertEqual(before == i - 1 and after, -1, "Expected (%d,-1), Got:(%d,%d)" % (i - 1, before, after))
else:
self.assertEqual(before == i - 1 and after, i + 1, "Expected (%d,%d), Got:(%d,%d)" % (i - 1, i + 1, before, after))
(before, after) = polyline.adjacentVertices(100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
# 5---4
# | |
# | 2-3
# | |
# 0-1
polygon = QgsGeometry.fromPolygon(
[[
QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0),
]]
)
(before, after) = polygon.adjacentVertices(-100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
for i in range(0, 7):
(before, after) = polygon.adjacentVertices(i)
if i == 0 or i == 6:
self.assertEqual(before == 5 and after, 1, "Expected (5,1), Got:(%d,%d)" % (before, after))
else:
self.assertEqual(before == i - 1 and after, i + 1, "Expected (%d,%d), Got:(%d,%d)" % (i - 1, i + 1, before, after))
(before, after) = polygon.adjacentVertices(100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
# 3-+-+-2
# | |
# + 8-7 +
# | | | |
# + 5-6 +
# | |
# 0-+-+-1
polygon = QgsGeometry.fromPolygon(
[
[QgsPoint(0, 0), QgsPoint(3, 0), QgsPoint(3, 3), QgsPoint(0, 3), QgsPoint(0, 0)],
[QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(1, 2), QgsPoint(1, 1)],
]
)
(before, after) = polygon.adjacentVertices(-100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
for i in range(0, 8):
(before, after) = polygon.adjacentVertices(i)
if i == 0 or i == 4:
self.assertEqual(before == 3 and after, 1, "Expected (3,1), Got:(%d,%d)" % (before, after))
elif i == 5:
self.assertEqual(before == 8 and after, 6, "Expected (2,0), Got:(%d,%d)" % (before, after))
else:
self.assertEqual(before == i - 1 and after, i + 1, "Expected (%d,%d), Got:(%d,%d)" % (i - 1, i + 1, before, after))
(before, after) = polygon.adjacentVertices(100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
# 5-+-4 0-+-9
# | | | |
# | 2-3 1-2 |
# | | | |
# 0-1 7-8
polygon = QgsGeometry.fromMultiPolygon(
[
[[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0), ]],
[[QgsPoint(4, 0), QgsPoint(5, 0), QgsPoint(5, 2), QgsPoint(3, 2), QgsPoint(3, 1), QgsPoint(4, 1), QgsPoint(4, 0), ]]
]
)
(before, after) = polygon.adjacentVertices(-100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
for i in range(0, 14):
(before, after) = polygon.adjacentVertices(i)
if i == 0 or i == 6:
self.assertEqual(before == 5 and after, 1, "Expected (5,1), Got:(%d,%d)" % (before, after))
elif i == 7 or i == 13:
self.assertEqual(before == 12 and after, 8, "Expected (12,8), Got:(%d,%d)" % (before, after))
else:
self.assertEqual(before == i - 1 and after, i + 1, "Expected (%d,%d), Got:(%d,%d)" % (i - 1, i + 1, before, after))
(before, after) = polygon.adjacentVertices(100)
self.assertEqual(before == -1 and after, -1, "Expected (-1,-1), Got:(%d,%d)" % (before, after))
def testVertexAt(self):
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4 !
# |
# 1-+-+-+-+-0 !
points = [QgsPoint(5, 0), QgsPoint(0, 0), QgsPoint(0, 4), QgsPoint(5, 4), QgsPoint(5, 1), QgsPoint(1, 1), QgsPoint(1, 3), QgsPoint(4, 3), QgsPoint(4, 2), QgsPoint(2, 2)]
polyline = QgsGeometry.fromPolyline(points)
for i in range(0, len(points)):
self.assertEqual(points[i], polyline.vertexAt(i), "Mismatch at %d" % i)
# 2-3 6-+-7
# | | | |
# 0-1 4 5 8-9
points = [
[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 0), ],
[QgsPoint(3, 0), QgsPoint(3, 1), QgsPoint(5, 1), QgsPoint(5, 0), QgsPoint(6, 0), ]
]
polyline = QgsGeometry.fromMultiPolyline(points)
p = polyline.vertexAt(-100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
p = polyline.vertexAt(100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
i = 0
for j in range(0, len(points)):
for k in range(0, len(points[j])):
self.assertEqual(points[j][k], polyline.vertexAt(i), "Mismatch at %d / %d,%d" % (i, j, k))
i += 1
# 5---4
# | |
# | 2-3
# | |
# 0-1
points = [[
QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0),
]]
polygon = QgsGeometry.fromPolygon(points)
p = polygon.vertexAt(-100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
p = polygon.vertexAt(100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
i = 0
for j in range(0, len(points)):
for k in range(0, len(points[j])):
self.assertEqual(points[j][k], polygon.vertexAt(i), "Mismatch at %d / %d,%d" % (i, j, k))
i += 1
# 3-+-+-2
# | |
# + 8-7 +
# | | | |
# + 5-6 +
# | |
# 0-+-+-1
points = [
[QgsPoint(0, 0), QgsPoint(3, 0), QgsPoint(3, 3), QgsPoint(0, 3), QgsPoint(0, 0)],
[QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(1, 2), QgsPoint(1, 1)],
]
polygon = QgsGeometry.fromPolygon(points)
p = polygon.vertexAt(-100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
p = polygon.vertexAt(100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
i = 0
for j in range(0, len(points)):
for k in range(0, len(points[j])):
self.assertEqual(points[j][k], polygon.vertexAt(i), "Mismatch at %d / %d,%d" % (i, j, k))
i += 1
# 5-+-4 0-+-9
# | | | |
# | 2-3 1-2 |
# | | | |
# 0-1 7-8
points = [
[[QgsPoint(0, 0), QgsPoint(1, 0), QgsPoint(1, 1), QgsPoint(2, 1), QgsPoint(2, 2), QgsPoint(0, 2), QgsPoint(0, 0), ]],
[[QgsPoint(4, 0), QgsPoint(5, 0), QgsPoint(5, 2), QgsPoint(3, 2), QgsPoint(3, 1), QgsPoint(4, 1), QgsPoint(4, 0), ]]
]
polygon = QgsGeometry.fromMultiPolygon(points)
p = polygon.vertexAt(-100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
p = polygon.vertexAt(100)
self.assertEqual(p, QgsPoint(0, 0), "Expected 0,0, Got %s" % p.toString())
i = 0
for j in range(0, len(points)):
for k in range(0, len(points[j])):
for l in range(0, len(points[j][k])):
p = polygon.vertexAt(i)
self.assertEqual(points[j][k][l], p, "Got %s, Expected %s at %d / %d,%d,%d" % (p.toString(), points[j][k][l].toString(), i, j, k, l))
i += 1
def testMultipoint(self):
# #9423
points = [QgsPoint(10, 30), QgsPoint(40, 20), QgsPoint(30, 10), QgsPoint(20, 10)]
wkt = "MultiPoint ((10 30),(40 20),(30 10),(20 10))"
multipoint = QgsGeometry.fromWkt(wkt)
assert multipoint.isMultipart(), "Expected MultiPoint to be multipart"
self.assertEqual(multipoint.wkbType(), QgsWkbTypes.MultiPoint, "Expected wkbType to be WKBMultipoint")
i = 0
for p in multipoint.asMultiPoint():
self.assertEqual(p, points[i], "Expected %s at %d, got %s" % (points[i].toString(), i, p.toString()))
i += 1
multipoint = QgsGeometry.fromWkt("MultiPoint ((5 5))")
self.assertEqual(multipoint.vertexAt(0), QgsPoint(5, 5), "MULTIPOINT fromWkt failed")
assert multipoint.insertVertex(4, 4, 0), "MULTIPOINT insert 4,4 at 0 failed"
expwkt = "MultiPoint ((4 4),(5 5))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert multipoint.insertVertex(7, 7, 2), "MULTIPOINT append 7,7 at 2 failed"
expwkt = "MultiPoint ((4 4),(5 5),(7 7))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert multipoint.insertVertex(6, 6, 2), "MULTIPOINT append 6,6 at 2 failed"
expwkt = "MultiPoint ((4 4),(5 5),(6 6),(7 7))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert not multipoint.deleteVertex(4), "MULTIPOINT delete at 4 unexpectedly succeeded"
assert not multipoint.deleteVertex(-1), "MULTIPOINT delete at -1 unexpectedly succeeded"
assert multipoint.deleteVertex(1), "MULTIPOINT delete at 1 failed"
expwkt = "MultiPoint ((4 4),(6 6),(7 7))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert multipoint.deleteVertex(2), "MULTIPOINT delete at 2 failed"
expwkt = "MultiPoint ((4 4),(6 6))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert multipoint.deleteVertex(0), "MULTIPOINT delete at 2 failed"
expwkt = "MultiPoint ((6 6))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
multipoint = QgsGeometry.fromWkt("MultiPoint ((5 5))")
self.assertEqual(multipoint.vertexAt(0), QgsPoint(5, 5), "MultiPoint fromWkt failed")
def testMoveVertex(self):
multipoint = QgsGeometry.fromWkt("MultiPoint ((5 0),(0 0),(0 4),(5 4),(5 1),(1 1),(1 3),(4 3),(4 2),(2 2))")
# try moving invalid vertices
assert not multipoint.moveVertex(9, 9, -1), "move vertex succeeded when it should have failed"
assert not multipoint.moveVertex(9, 9, 10), "move vertex succeeded when it should have failed"
assert not multipoint.moveVertex(9, 9, 11), "move vertex succeeded when it should have failed"
for i in range(0, 10):
assert multipoint.moveVertex(i + 1, -1 - i, i), "move vertex %d failed" % i
expwkt = "MultiPoint ((1 -1),(2 -2),(3 -3),(4 -4),(5 -5),(6 -6),(7 -7),(8 -8),(9 -9),(10 -10))"
wkt = multipoint.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4 !
# |
# 1-+-+-+-+-0 !
polyline = QgsGeometry.fromWkt("LineString (5 0, 0 0, 0 4, 5 4, 5 1, 1 1, 1 3, 4 3, 4 2, 2 2)")
# try moving invalid vertices
assert not polyline.moveVertex(9, 9, -1), "move vertex succeeded when it should have failed"
assert not polyline.moveVertex(9, 9, 10), "move vertex succeeded when it should have failed"
assert not polyline.moveVertex(9, 9, 11), "move vertex succeeded when it should have failed"
assert polyline.moveVertex(5.5, 4.5, 3), "move vertex failed"
expwkt = "LineString (5 0, 0 0, 0 4, 5.5 4.5, 5 1, 1 1, 1 3, 4 3, 4 2, 2 2)"
wkt = polyline.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
# 5-+-4
# | |
# 6 2-3
# | |
# 0-1
polygon = QgsGeometry.fromWkt("Polygon ((0 0, 1 0, 1 1, 2 1, 2 2, 0 2, 0 0))")
assert not polygon.moveVertex(3, 4, -10), "move vertex unexpectedly succeeded"
assert not polygon.moveVertex(3, 4, 7), "move vertex unexpectedly succeeded"
assert not polygon.moveVertex(3, 4, 8), "move vertex unexpectedly succeeded"
assert polygon.moveVertex(1, 2, 0), "move vertex failed"
expwkt = "Polygon ((1 2, 1 0, 1 1, 2 1, 2 2, 0 2, 1 2))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert polygon.moveVertex(3, 4, 3), "move vertex failed"
expwkt = "Polygon ((1 2, 1 0, 1 1, 3 4, 2 2, 0 2, 1 2))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert polygon.moveVertex(2, 3, 6), "move vertex failed"
expwkt = "Polygon ((2 3, 1 0, 1 1, 3 4, 2 2, 0 2, 2 3))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
# 5-+-4 0-+-9
# | | | |
# 6 2-3 1-2!+
# | | | |
# 0-1 7-8
polygon = QgsGeometry.fromWkt("MultiPolygon (((0 0, 1 0, 1 1, 2 1, 2 2, 0 2, 0 0)),((4 0, 5 0, 5 2, 3 2, 3 1, 4 1, 4 0)))")
assert not polygon.moveVertex(3, 4, -10), "move vertex unexpectedly succeeded"
assert not polygon.moveVertex(3, 4, 14), "move vertex unexpectedly succeeded"
assert not polygon.moveVertex(3, 4, 15), "move vertex unexpectedly succeeded"
assert polygon.moveVertex(6, 2, 9), "move vertex failed"
expwkt = "MultiPolygon (((0 0, 1 0, 1 1, 2 1, 2 2, 0 2, 0 0)),((4 0, 5 0, 6 2, 3 2, 3 1, 4 1, 4 0)))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert polygon.moveVertex(1, 2, 0), "move vertex failed"
expwkt = "MultiPolygon (((1 2, 1 0, 1 1, 2 1, 2 2, 0 2, 1 2)),((4 0, 5 0, 6 2, 3 2, 3 1, 4 1, 4 0)))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
assert polygon.moveVertex(2, 1, 7), "move vertex failed"
expwkt = "MultiPolygon (((1 2, 1 0, 1 1, 2 1, 2 2, 0 2, 1 2)),((2 1, 5 0, 6 2, 3 2, 3 1, 4 1, 2 1)))"
wkt = polygon.exportToWkt()
assert compareWkt(expwkt, wkt), "Expected:\n%s\nGot:\n%s\n" % (expwkt, wkt)
def testDeleteVertex(self):
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4
# |
# 1-+-+-+-+-0
polyline = QgsGeometry.fromWkt("LineString (5 0, 0 0, 0 4, 5 4, 5 1, 1 1, 1 3, 4 3, 4 2, 2 2)")
assert polyline.deleteVertex(3), "Delete vertex 5 4 failed"
expwkt = "LineString (5 0, 0 0, 0 4, 5 1, 1 1, 1 3, 4 3, 4 2, 2 2)"