init random generator before creating points

Author: alexbruy

python/plugins/processing/algs/qgis/RandomPointsExtent.py

@@ -83,6 +83,8 @@ def processAlgorithm(self, progress):
         index = QgsSpatialIndex()
         points = dict()
 
+        random.seed()
+
         while nIterations < maxIterations and nPoints < pointCount:
             rx = xMin + (xMax - xMin) * random.random()
             ry = yMin + (yMax - yMin) * random.random()

python/plugins/processing/algs/qgis/RandomPointsLayer.py

@@ -84,6 +84,8 @@ def processAlgorithm(self, progress):
 
         request = QgsFeatureRequest()
 
+        random.seed()
+
         while nIterations < maxIterations and nPoints < pointCount:
             rx = bbox.xMinimum() + bbox.width() * random.random()
             ry = bbox.yMinimum() + bbox.height() * random.random()

python/plugins/processing/algs/qgis/RandomPointsPolygonsFixed.py

@@ -80,10 +80,9 @@ def processAlgorithm(self, progress):
         writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
             fields, QGis.WKBPoint, layer.dataProvider().crs())
 
-
         request = QgsFeatureRequest()
-
         da = QgsDistanceArea()
+
         features = vector.features(layer)
         for current, f in enumerate(features):
             fGeom = QgsGeometry(f.geometry())
@@ -101,6 +100,8 @@ def processAlgorithm(self, progress):
             maxIterations = pointCount * 200
             total = 100.0 / pointCount
 
+            random.seed()
+
             while nIterations < maxIterations and nPoints < pointCount:
                 rx = bbox.xMinimum() + bbox.width() * random.random()
                 ry = bbox.yMinimum() + bbox.height() * random.random()

python/plugins/processing/algs/qgis/RandomPointsPolygonsVariable.py

@@ -82,8 +82,8 @@ def processAlgorithm(self, progress):
             fields, QGis.WKBPoint, layer.dataProvider().crs())
 
         request = QgsFeatureRequest()
-
         da = QgsDistanceArea()
+
         features = vector.features(layer)
         for current, f in enumerate(features):
             fGeom = QgsGeometry(f.geometry())
@@ -101,6 +101,8 @@ def processAlgorithm(self, progress):
             maxIterations = pointCount * 200
             total = 100.0 / pointCount
 
+            random.seed()
+
             while nIterations < maxIterations and nPoints < pointCount:
                 rx = bbox.xMinimum() + bbox.width() * random.random()
                 ry = bbox.yMinimum() + bbox.height() * random.random()