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-rw-r--r--libcrystfel/src/cell-utils.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/libcrystfel/src/cell-utils.h b/libcrystfel/src/cell-utils.h
index 000c863a..efb4b25b 100644
--- a/libcrystfel/src/cell-utils.h
+++ b/libcrystfel/src/cell-utils.h
@@ -35,6 +35,8 @@
#include <config.h>
#endif
+#include <gsl/gsl_matrix.h>
+
#include "cell.h"
#ifdef __cplusplus
@@ -47,6 +49,7 @@ extern double resolution(UnitCell *cell,
extern UnitCell *cell_rotate(UnitCell *in, struct quaternion quat);
extern UnitCell *rotate_cell(UnitCell *in, double omega, double phi,
double rot);
+extern UnitCell *transform_cell_gsl(UnitCell *in, gsl_matrix *m);
extern void cell_print(UnitCell *cell);