1 files changed, 7 insertions, 0 deletions
diff --git a/source/blender/draw/intern/shaders/common_math_geom_lib.glsl b/source/blender/draw/intern/shaders/common_math_geom_lib.glsl
index 6b0a7b028ee..7b701d1d81b 100644
--- a/source/blender/draw/intern/shaders/common_math_geom_lib.glsl
+++ b/source/blender/draw/intern/shaders/common_math_geom_lib.glsl
@@ -83,6 +83,13 @@ float line_unit_box_intersect_dist(vec3 lineorigin, vec3 linedirection)
   return min_v3(furthestplane);
 }
 
+float line_unit_box_intersect_dist_safe(vec3 lineorigin, vec3 linedirection)
+{
+  vec3 safe_linedirection = max(vec3(1e-8), abs(linedirection)) *
+                            mix(vec3(1.0), -vec3(1.0), lessThan(linedirection, vec3(0.0)));
+  return line_unit_box_intersect_dist(lineorigin, safe_linedirection);
+}
+
 /** \} */
 
 /* ---------------------------------------------------------------------- */