def testGenerationWithStepSize(self):
rl = QgsRasterLayer(os.path.join(unitTestDataPath(), '3d', 'dtm.tif'), 'DTM')
self.assertTrue(rl.isValid())
curve = QgsLineString()
curve.fromWkt('LineString (-348095.18706532847136259 6633687.0235139261931181, -347271.57799367723055184 6633093.13086318597197533, -346140.60267287614988163 6632697.89590711053460836, -345777.013075890194159 6631575.50219972990453243)')
req = QgsProfileRequest(curve)
req.setStepDistance(10)
generator = rl.createProfileGenerator(req)
# not enabled for elevation
self.assertIsNone(generator)
rl.elevationProperties().setEnabled(True)
generator = rl.createProfileGenerator(req)
self.assertIsNotNone(generator)
# the request did not have the crs of the linestring set, so the whole linestring falls outside the raster extent
self.assertFalse(generator.generateProfile())
# set correct crs for linestring and re-try
req.setCrs(QgsCoordinateReferenceSystem('EPSG:3857'))
generator = rl.createProfileGenerator(req)
self.assertTrue(generator.generateProfile())
r = generator.takeResults()
results = r.distanceToHeightMap()
self.assertEqual(len(results), 341)
first_point = min(results.keys())
last_point = max(results.keys())
self.assertEqual(results[first_point], 154)
self.assertEqual(results[last_point], 99)
self.assertEqual(r.zRange().lower(), 74)
self.assertEqual(r.zRange().upper(), 154)
def testIdentify(self):
rl = QgsRasterLayer(os.path.join(unitTestDataPath(), '3d', 'dtm.tif'), 'DTM')
self.assertTrue(rl.isValid())
rl.elevationProperties().setEnabled(True)
curve = QgsLineString()
curve.fromWkt('LineString (321621.3770066662109457 129734.87810317709227093, 321894.21278918092139065 129858.49142702402605209)')
req = QgsProfileRequest(curve)
generator = rl.createProfileGenerator(req)
self.assertTrue(generator.generateProfile())
r = generator.takeResults()
# try identifying
context = QgsProfileIdentifyContext()
res = r.identify(QgsProfilePoint(-10, -10), context)
self.assertFalse(res)
context.maximumSurfaceDistanceDelta = 0
context.maximumSurfaceElevationDelta = 3
context.maximumPointDistanceDelta = 0
context.maximumPointElevationDelta = 0
res = r.identify(QgsProfilePoint(0, 70), context)
self.assertEqual(len(res), 1)
self.assertEqual(res[0].layer(), rl)
self.assertEqual(res[0].results(), [{'distance': 0.0, 'elevation': 72.0}])
context.maximumSurfaceDistanceDelta = 0
context.maximumSurfaceElevationDelta = 5
res = r.identify(QgsProfilePoint(200, 79), context)
self.assertEqual(len(res), 1)
self.assertEqual(res[0].layer(), rl)
self.assertEqual(res[0].results(), [{'distance': 200.0, 'elevation': 75.0}])
res = r.identify(QgsProfilePoint(200, 85), context)
self.assertFalse(res)
def testSnapping(self):
rl = QgsRasterLayer(os.path.join(unitTestDataPath(), '3d', 'dtm.tif'), 'DTM')
self.assertTrue(rl.isValid())
rl.elevationProperties().setEnabled(True)
curve = QgsLineString()
curve.fromWkt('LineString (321621.3770066662109457 129734.87810317709227093, 321894.21278918092139065 129858.49142702402605209)')
req = QgsProfileRequest(curve)
generator = rl.createProfileGenerator(req)
self.assertTrue(generator.generateProfile())
r = generator.takeResults()
# try snapping some points
context = QgsProfileSnapContext()
res = r.snapPoint(QgsProfilePoint(-10, -10), context)
self.assertFalse(res.isValid())
context.maximumSurfaceDistanceDelta = 0
context.maximumSurfaceElevationDelta = 3
context.maximumPointDistanceDelta = 0
context.maximumPointElevationDelta = 0
res = r.snapPoint(QgsProfilePoint(0, 70), context)
self.assertTrue(res.isValid())
self.assertEqual(res.snappedPoint.distance(), 0)
self.assertEqual(res.snappedPoint.elevation(), 72)
context.maximumSurfaceDistanceDelta = 0
context.maximumSurfaceElevationDelta = 5
res = r.snapPoint(QgsProfilePoint(200, 79), context)
self.assertTrue(res.isValid())
self.assertEqual(res.snappedPoint.distance(), 200)
self.assertEqual(res.snappedPoint.elevation(), 75)
res = r.snapPoint(QgsProfilePoint(200, 85), context)
self.assertFalse(res.isValid())