Math Lib: Add dist_squared_ray_to_aabb_v3 utility

1 files changed, 17 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_math_geom.h b/source/blender/blenlib/BLI_math_geom.h
index 06412835936..dff4c68d4b9 100644
--- a/source/blender/blenlib/BLI_math_geom.h
+++ b/source/blender/blenlib/BLI_math_geom.h
@@ -284,6 +284,23 @@ bool isect_ray_aabb_v3(
         const struct IsectRayAABB_Precalc *data,
         const float bb_min[3], const float bb_max[3], float *tmin);
 
+struct NearestRayToAABB_Precalc {
+	float ray_origin[3];
+	float ray_dot_axis[3];
+	float idot_axis[3];
+	float cdot_axis[3];
+	float idiag_sq[3];
+	bool sign[3];
+};
+
+void dist_squared_ray_to_aabb_v3_precalc(
+        struct NearestRayToAABB_Precalc *data,
+        const float ray_origin[3], const float ray_direction[3]);
+float dist_squared_ray_to_aabb_v3(
+        const struct NearestRayToAABB_Precalc *data,
+        const float bb_min[3], const float bb_max[3],
+        bool r_axis_closest[3]);
+
 /* other */
 bool isect_sweeping_sphere_tri_v3(const float p1[3], const float p2[3], const float radius,
                                   const float v0[3], const float v1[3], const float v2[3], float *r_lambda, float ipoint[3]);