From 3458670eee995b9330613d5dc257268e0dae117b Mon Sep 17 00:00:00 2001
From: jovoy <50204158+jovoy@users.noreply.github.com>
Date: Thu, 22 Feb 2024 16:59:21 +0100
Subject: [PATCH] Make the generator target position changable

---
 src/TRestAxionGeneratorProcess.cxx | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/TRestAxionGeneratorProcess.cxx b/src/TRestAxionGeneratorProcess.cxx
index f7ff7a11..76b03c53 100644
--- a/src/TRestAxionGeneratorProcess.cxx
+++ b/src/TRestAxionGeneratorProcess.cxx
@@ -166,9 +166,10 @@ TRestEvent* TRestAxionGeneratorProcess::ProcessEvent(TRestEvent* evInput) {
 
     /// The axion position must be displaced by the target size.
     /// We always do this. It is independent of generator
-    /// The target is virtually placed at the (0,0,0).
+    /// The target is virtually placed at the (0,0,0) + TargetPosition since the 
+    /// experiment is not focussed by the bore but by the whole experiment.
     /// In my opinion the target should be either the optics, or the magnet end bore.
-    /// Then one should place the optics or the magnet end bore at the (0,0,0).
+    /// Then one should place the optics or the magnet end bore at the (0,0,0) + TargetPosition.
     ///
     do {
         x = 2 * (fRandom->Rndm() - 0.5);
@@ -178,7 +179,7 @@ TRestEvent* TRestAxionGeneratorProcess::ProcessEvent(TRestEvent* evInput) {
 
     r = TMath::Sqrt(r);
 
-    axionPosition = axionPosition + TVector3(fTargetRadius * x, fTargetRadius * y, 0);
+    axionPosition = axionPosition + TVector3(fTargetRadius * x, fTargetRadius * y, 0) + fTargetPosition;
 
     Double_t mass = fRandom->Uniform(fAxionMassRange.X(), fAxionMassRange.Y());