1 files changed, 7 insertions, 2 deletions
diff --git a/3dmath.h b/3dmath.h
index 4135f3b..1635c40 100644
--- a/3dmath.h
+++ b/3dmath.h
@@ -1,3 +1,8 @@
-float dot(float x[3], float y[3]);
+#define POW2(x) ((x) * (x))
+
+float dot(const float x[3], const float y[3]);
 void normalize(float x[3]);
-float sphere_intersect(float y[3], float r[3], float s[3], float d[3], 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, int invert);