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-rw-r--r--libcrystfel/src/taketwo.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/libcrystfel/src/taketwo.c b/libcrystfel/src/taketwo.c
index 0dc1ed51..082e7886 100644
--- a/libcrystfel/src/taketwo.c
+++ b/libcrystfel/src/taketwo.c
@@ -245,6 +245,15 @@ static struct rvec new_rvec(double new_u, double new_v, double new_w)
return new_rvector;
}
+static struct rvec rvec_add_rvec(struct rvec first, struct rvec second)
+{
+ struct rvec diff = new_rvec(second.u + first.u,
+ second.v + first.v,
+ second.w + first.w);
+
+ return diff;
+}
+
static struct rvec diff_vec(struct rvec from, struct rvec to)
{