From c19a9c7571b3369aee89cd82d69edd17facd0e1b Mon Sep 17 00:00:00 2001
From: Nikiforos Nikiforou <Nikiforos.Nikiforou@cern.ch>
Date: Wed, 21 Jan 2015 13:53:07 +0000
Subject: [PATCH] Corrected orientation of u,v vectors
---
DDDetectors/src/SiTrackerBarrel_surfaces.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/DDDetectors/src/SiTrackerBarrel_surfaces.cpp b/DDDetectors/src/SiTrackerBarrel_surfaces.cpp
index e7bb16b8b..030dce20b 100644
--- a/DDDetectors/src/SiTrackerBarrel_surfaces.cpp
+++ b/DDDetectors/src/SiTrackerBarrel_surfaces.cpp
@@ -28,7 +28,8 @@ void Installer<UserData>::install(DetElement component, PlacedVolume pv) {
double outer_thickness = half_module_thickness + sensitive_z_position;
double inner_thickness = half_module_thickness - sensitive_z_position;
//Surface is placed at the center of the volume, no need to shift origin
- Vector3D u(1.,0.,0.), v(0.,1.,0.), n(0.,0.,1.), o(0.,0.,0.);
+ //Make sure u,v,n form a right-handed coordinate system, v along the final z
+ Vector3D u(-1.,0.,0.), v(0.,-1.,0.), n(0.,0.,1.), o(0.,0.,0.);
VolPlane surf(comp_vol,Type(Type::Sensitive,Type::Measurement1D),
inner_thickness, outer_thickness, u, v, n, o);
--
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