From fdc607dafa91e7678501805ee9d929f3cd20b3dd Mon Sep 17 00:00:00 2001
From: Oliver Hahn <oliverjhahn@gmail.com>
Date: Thu, 4 Jun 2020 13:59:02 +0200
Subject: [PATCH] fix overall minus in PANPHASIA noise

---
 src/plugins/random_panphasia.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/plugins/random_panphasia.cc b/src/plugins/random_panphasia.cc
index 1489f59..f2450bf 100644
--- a/src/plugins/random_panphasia.cc
+++ b/src/plugins/random_panphasia.cc
@@ -502,6 +502,9 @@ public:
             auto y1(g1.kelem(i, j, k)), y2(g2.kelem(i, j, k)), y3(g3.kelem(i, j, k)), y4(g4.kelem(i, j, k));
 
             g0.kelem(i, j, k) += 3.0 * (y1 * gx * gy * fz + y2 * fx * gy * gz + y3 * gx * fy * gz) + sqrt27 * y4 * gx * gy * gz;
+
+            // fix the overall minus w.r.t. the monofonic noise definition
+            g0.kelem(i, j, k ) *= -1.0;
           }
         }
       }