added rotations

1 files changed, 5 insertions, 0 deletions

diff --git a/linalg.h b/linalg.h
index 698b6f5..8362ab1 100644
--- a/linalg.h
+++ b/linalg.h
@@ -98,4 +98,9 @@ __device__ __host__ float dot(const float3 &a, const float3 &b)
 	return a.x*b.x + a.y*b.y + a.z*b.z;
 }
 
+__device__ __host__ float3 cross(const float3 &a, const float3 &b)
+{
+	return make_float3(a.y*b.z-a.z*b.y, a.z*b.x-a.x*b.z, a.x*b.y-a.y*b.x);
+}
+
 #endif