2 files changed, 7 insertions, 2 deletions
diff --git a/3dmath.c b/3dmath.c
index 5b876f2..2693c32 100644
--- a/3dmath.c
+++ b/3dmath.c
@@ -19,7 +19,9 @@ normalize(float x[3]) {
 }
 
 float
-sphere_intersect(float y[3], float r[3], const float s[3], const float d[3], const float c[3], float R) {
+sphere_intersect(float* restrict y, float* restrict r,
+                 const float* restrict s, const float* restrict d,
+                 const float* restrict c, float R) {
     int i;
     float D, n[3], t, v[3];
 
diff --git a/3dmath.h b/3dmath.h
index 0b6e035..3a984cb 100644
--- a/3dmath.h
+++ b/3dmath.h
@@ -1,3 +1,6 @@
 float dot(const float x[3], const float y[3]);
 void normalize(float x[3]);
-float sphere_intersect(float y[3], float r[3], const float s[3], const float d[3], const float c[3], float R);
+
+float sphere_intersect(float* restrict y, float* restrict r,
+                       const float* restrict s, const float* restrict d,
+                       const float* restrict c, float R);