reduce float comparisons for keying operation and despill.

1 files changed, 24 insertions, 0 deletions

diff --git a/source/blender/blenlib/intern/math_geom_inline.c b/source/blender/blenlib/intern/math_geom_inline.c
index 0d4c797cefb..bbf6dc9dfc2 100644
--- a/source/blender/blenlib/intern/math_geom_inline.c
+++ b/source/blender/blenlib/intern/math_geom_inline.c
@@ -137,4 +137,28 @@ MINLINE void madd_sh_shfl(float r[9], const float sh[9], const float f)
 	add_sh_shsh(r, r, tmp);
 }
 
+MINLINE int axis_primary_v3(const float vec[3])
+{
+	const float x = vec[0];
+	const float y = vec[1];
+	const float z = vec[2];
+
+	if (x > y) {
+		if (x > z) {
+			return 0;
+		}
+		else {
+			return 2;
+		}
+	}
+	else {
+		if (y > z) {
+			return 1;
+		}
+		else {
+			return 2;
+		}
+	}
+}
+
 #endif /* __MATH_GEOM_INLINE_C__ */