-
Notifications
You must be signed in to change notification settings - Fork 68
/
createDonut.py
270 lines (238 loc) · 10.3 KB
/
createDonut.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
"""
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import os
from geographiclib.geodesic import Geodesic
from qgis.core import (
QgsPointXY, QgsGeometry, QgsField,
QgsProject, QgsWkbTypes, QgsCoordinateTransform, QgsPropertyDefinition)
from qgis.core import (
QgsProcessing,
QgsProcessingParameters,
QgsProcessingFeatureBasedAlgorithm,
QgsProcessingParameterBoolean,
QgsProcessingParameterNumber,
QgsProcessingParameterEnum)
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtCore import QVariant, QUrl
from .settings import settings, epsg4326, geod
from .utils import tr, conversionToMeters, DISTANCE_LABELS, makeIdlCrossingsPositive, hasIdlCrossing
SHAPE_TYPE = [tr("Polygon"), tr("Line")]
class CreateDonutAlgorithm(QgsProcessingFeatureBasedAlgorithm):
"""
Algorithm to create a donut shape.
"""
PrmShapeType = 'ShapeType'
PrmOuterRadius = 'OuterRadius'
PrmInnerRadius = 'InnerRadius'
PrmUnitsOfMeasure = 'UnitsOfMeasure'
PrmDrawingSegments = 'DrawingSegments'
PrmExportInputGeometry = 'ExportInputGeometry'
def createInstance(self):
return CreateDonutAlgorithm()
def name(self):
return 'createdonut'
def icon(self):
return QIcon(os.path.join(os.path.dirname(__file__), 'images/donut.png'))
def displayName(self):
return tr('Create donut')
def group(self):
return tr('Geodesic shapes')
def groupId(self):
return 'vectorcreation'
def outputName(self):
return tr('Output layer')
def helpUrl(self):
file = os.path.dirname(__file__) + '/index.html'
if not os.path.exists(file):
return ''
return QUrl.fromLocalFile(file).toString(QUrl.FullyEncoded)
def inputLayerTypes(self):
return [QgsProcessing.TypeVectorPoint]
def outputWkbType(self, input_wkb_type):
if self.shape_type == 0:
return (QgsWkbTypes.Polygon)
return (QgsWkbTypes.MultiLineString)
def outputFields(self, input_fields):
if self.export_geom:
name_x, name_y = settings.getGeomNames(input_fields.names())
input_fields.append(QgsField(name_x, QVariant.Double))
input_fields.append(QgsField(name_y, QVariant.Double))
return(input_fields)
def supportInPlaceEdit(self, layer):
return False
def initParameters(self, config=None):
self.shape_type = 0
self.export_geom = False
self.addParameter(
QgsProcessingParameterEnum(
self.PrmShapeType,
tr('Shape type'),
options=SHAPE_TYPE,
defaultValue=0,
optional=False)
)
param = QgsProcessingParameterNumber(
self.PrmOuterRadius,
tr('Outer radius'),
QgsProcessingParameterNumber.Double,
defaultValue=20.0,
minValue=0,
optional=False)
param.setIsDynamic(True)
param.setDynamicPropertyDefinition(QgsPropertyDefinition(
self.PrmOuterRadius,
tr('Outer radius'),
QgsPropertyDefinition.Double))
param.setDynamicLayerParameterName('INPUT')
self.addParameter(param)
param = QgsProcessingParameterNumber(
self.PrmInnerRadius,
tr('Inner radius'),
QgsProcessingParameterNumber.Double,
defaultValue=10.0,
minValue=0,
optional=False)
param.setIsDynamic(True)
param.setDynamicPropertyDefinition(QgsPropertyDefinition(
self.PrmInnerRadius,
tr('Inner radius'),
QgsPropertyDefinition.Double))
param.setDynamicLayerParameterName('INPUT')
self.addParameter(param)
self.addParameter(
QgsProcessingParameterEnum(
self.PrmUnitsOfMeasure,
tr('Radius units'),
options=DISTANCE_LABELS,
defaultValue=0,
optional=False)
)
self.addParameter(
QgsProcessingParameterNumber(
self.PrmDrawingSegments,
tr('Number of drawing segments'),
QgsProcessingParameterNumber.Integer,
defaultValue=36,
minValue=4,
optional=True)
)
self.addParameter(
QgsProcessingParameterBoolean(
self.PrmExportInputGeometry,
tr('Add input geometry fields to output table'),
False,
optional=True)
)
def prepareAlgorithm(self, parameters, context, feedback):
self.shape_type = self.parameterAsInt(parameters, self.PrmShapeType, context)
self.outer_radius = self.parameterAsDouble(parameters, self.PrmOuterRadius, context)
if self.outer_radius <= 0:
feedback.reportError('Outer radius parameter must be greater than 0')
return False
self.outer_radius_dyn = QgsProcessingParameters.isDynamic(parameters, self.PrmOuterRadius)
if self.outer_radius_dyn:
self.outer_radius_property = parameters[self.PrmOuterRadius]
self.inner_radius = self.parameterAsDouble(parameters, self.PrmInnerRadius, context)
self.inner_radius_dyn = QgsProcessingParameters.isDynamic(parameters, self.PrmInnerRadius)
if self.inner_radius_dyn:
self.inner_radius_property = parameters[self.PrmInnerRadius]
segments = self.parameterAsInt(parameters, self.PrmDrawingSegments, context)
units = self.parameterAsInt(parameters, self.PrmUnitsOfMeasure, context)
self.export_geom = self.parameterAsBool(parameters, self.PrmExportInputGeometry, context)
self.measure_factor = conversionToMeters(units)
self.inner_radius_converted = self.inner_radius * self.measure_factor
self.outer_radius_converted = self.outer_radius * self.measure_factor
self.pt_spacing = 360.0 / segments
source = self.parameterAsSource(parameters, 'INPUT', context)
src_crs = source.sourceCrs()
self.total_features = source.featureCount()
if src_crs != epsg4326:
self.geom_to_4326 = QgsCoordinateTransform(src_crs, epsg4326, QgsProject.instance())
self.to_sink_crs = QgsCoordinateTransform(epsg4326, src_crs, QgsProject.instance())
else:
self.geom_to_4326 = None
self.to_sink_crs = None
self.num_bad = 0
return True
def processFeature(self, feature, context, feedback):
try:
pts_in = []
pts_out = []
pt = feature.geometry().asPoint()
pt_orig_x = pt.x()
pt_orig_y = pt.y()
# make sure the coordinates are in EPSG:4326
if self.geom_to_4326:
pt = self.geom_to_4326.transform(pt.x(), pt.y())
lat = pt.y()
lon = pt.x()
if self.inner_radius_dyn:
inner_rad, e = self.inner_radius_property.valueAsDouble(context.expressionContext(), self.inner_radius)
if not e:
self.num_bad += 1
return []
inner_rad *= self.measure_factor
else:
inner_rad = self.inner_radius_converted
if self.outer_radius_dyn:
outer_rad, e = self.outer_radius_property.valueAsDouble(context.expressionContext(), self.outer_radius)
outer_rad *= self.measure_factor
if not e or outer_rad <= 0:
self.num_bad += 1
return []
else:
outer_rad = self.outer_radius_converted
angle = 0
while angle < 360:
if inner_rad != 0:
g = geod.Direct(lat, lon, angle, inner_rad, Geodesic.LATITUDE | Geodesic.LONGITUDE)
pts_in.append(QgsPointXY(g['lon2'], g['lat2']))
g = geod.Direct(lat, lon, angle, outer_rad, Geodesic.LATITUDE | Geodesic.LONGITUDE)
pts_out.append(QgsPointXY(g['lon2'], g['lat2']))
angle += self.pt_spacing
if inner_rad != 0:
pts_in.append(pts_in[0])
pts_out.append(pts_out[0])
crosses_idl = hasIdlCrossing(pts_out)
if crosses_idl:
if inner_rad != 0:
makeIdlCrossingsPositive(pts_in, True)
makeIdlCrossingsPositive(pts_out, True)
# If the Output crs is not 4326 transform the points to the proper crs
if self.to_sink_crs:
if inner_rad != 0:
for x, pt_out in enumerate(pts_in):
pts_in[x] = self.to_sink_crs.transform(pt_out)
for x, pt_out in enumerate(pts_out):
pts_out[x] = self.to_sink_crs.transform(pt_out)
if self.shape_type == 0:
if inner_rad == 0:
feature.setGeometry(QgsGeometry.fromPolygonXY([pts_out]))
else:
feature.setGeometry(QgsGeometry.fromPolygonXY([pts_out, pts_in]))
else:
if inner_rad == 0:
feature.setGeometry(QgsGeometry.fromMultiPolylineXY([pts_out]))
else:
feature.setGeometry(QgsGeometry.fromMultiPolylineXY([pts_out, pts_in]))
if self.export_geom:
attr = feature.attributes()
attr.append(pt_orig_x)
attr.append(pt_orig_y)
feature.setAttributes(attr)
except Exception:
self.num_bad += 1
return []
return [feature]
def postProcessAlgorithm(self, context, feedback):
if self.num_bad:
feedback.pushInfo(tr("{} out of {} features had invalid parameters and were ignored.".format(self.num_bad, self.total_features)))
return {}