2 files changed, 19 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_unit.h b/source/blender/blenkernel/BKE_unit.h
index 6b72c01bf0a..91b1702ca82 100644
--- a/source/blender/blenkernel/BKE_unit.h
+++ b/source/blender/blenkernel/BKE_unit.h
@@ -36,6 +36,9 @@ void	bUnit_AsString(char *str, double value, int prec, int system, int type, int
 /* replace units with values, used before python button evaluation */
 int		bUnit_ReplaceString(char *str, char *str_orig, char *str_prev, double scale_pref, int system, int type);
 
+/* the size of the unit used for this value (used for calculating the ckickstep) */
+double bUnit_Size(double value, int system, int type);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/blenkernel/intern/unit.c b/source/blender/blenkernel/intern/unit.c
index eaa90a87691..5ecc8ddf5b8 100644
--- a/source/blender/blenkernel/intern/unit.c
+++ b/source/blender/blenkernel/intern/unit.c
@@ -347,3 +347,19 @@ int bUnit_ReplaceString(char *str, char *str_orig, char *str_prev, double scale_
 	// printf("replace %s\n", str);
 	return change;
 }
+
+
+double bUnit_Size(double value, int system, int type)
+{
+	bUnitCollection *usys = unit_get_system(system, type);
+	bUnitDef *unit;
+
+	if(usys==NULL)
+		return -1;
+
+	unit= unit_best_fit(value, usys, NULL);
+	if(unit==NULL)
+		return -1;
+
+	return unit->mul;
+}