From a2df705677f5f72753d5576f1d76ed99807a632e Mon Sep 17 00:00:00 2001
From: Hans van der Kwast <jvdkwast@yahoo.com>
Date: Sat, 9 Mar 2019 16:43:59 +0100
Subject: [PATCH] corrected for 0 vectors

---
 crayfish/processing/saga_flow_to_grib.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/crayfish/processing/saga_flow_to_grib.py b/crayfish/processing/saga_flow_to_grib.py
index 23a8a0b5..0a39f9b7 100644
--- a/crayfish/processing/saga_flow_to_grib.py
+++ b/crayfish/processing/saga_flow_to_grib.py
@@ -106,13 +106,13 @@ def processAlgorithm(self, parameters, context, feedback):
         y_block = QgsRasterBlock(Qgis.Float32, width, height)
         diag = 1. / sqrt(2)
         dir_map = {
-            0: (0, 1),
+            0: (1e-7, 1),
             1: (diag, diag),
-            2: (1, 0),
+            2: (1, 1e-7),
             3: (diag, -diag),
-            4: (0, -1),
+            4: (1e-7, -1),
             5: (-diag, -diag),
-            6: (-1, 0),
+            6: (-1, 1e-7),
             7: (-diag, diag),
             255: (0, 0)
         }