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-rw-r--r--libcrystfel/src/geometry.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/libcrystfel/src/geometry.h b/libcrystfel/src/geometry.h
index db3c0fe8..0a403a9c 100644
--- a/libcrystfel/src/geometry.h
+++ b/libcrystfel/src/geometry.h
@@ -97,8 +97,12 @@ enum gparam {
struct polarisation
{
double fraction; /**< Polarisation fraction (0 to 1) */
+
double angle; /**< Angle of electron beam, radians, clockwise from
* horizontal when looking along beam */
+
+ int disable; /**< If set, don't even correct for the polarisation
+ * of the diffracted beam (1 - 0.5sin^2(2theta)) */
};