2 files changed, 15 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_math_base.h b/source/blender/blenlib/BLI_math_base.h
index c862290b262..028ca31a059 100644
--- a/source/blender/blenlib/BLI_math_base.h
+++ b/source/blender/blenlib/BLI_math_base.h
@@ -117,6 +117,9 @@ MINLINE float sasqrt(float fac);
 MINLINE float interpf(float a, float b, float t);
 MINLINE double interpd(double a, double b, double t);
 
+MINLINE float ratiof(float min, float max, float pos);
+MINLINE double ratiod(double min, double max, double pos);
+
 /* NOTE: Compilers will upcast all types smaller than int to int when performing arithmetic
  * operation. */
 MINLINE int square_s(short a);
diff --git a/source/blender/blenlib/intern/math_base_inline.c b/source/blender/blenlib/intern/math_base_inline.c
index 39945960e68..6481fac5a14 100644
--- a/source/blender/blenlib/intern/math_base_inline.c
+++ b/source/blender/blenlib/intern/math_base_inline.c
@@ -180,6 +180,18 @@ MINLINE double interpd(double target, double origin, double fac)
   return (fac * target) + (1.0f - fac) * origin;
 }
 
+MINLINE float ratiof(float min, float max, float pos)
+{
+  float range = max - min;
+  return range == 0 ? 0 : ((pos - min) / range);
+}
+
+MINLINE double ratiod(double min, double max, double pos)
+{
+  double range = max - min;
+  return range == 0 ? 0 : ((pos - min) / range);
+}
+
 /* used for zoom values*/
 MINLINE float power_of_2(float val)
 {