commit 3e87d8dadefaf4b56bf15a15f1b53928d7a12cd2
author Michael Johnson <mpj@google.com> Fri Aug 19 11:47:08 2011 -0700
committer Mathias Agopian <mathias@google.com> Wed Jun 27 17:07:55 2012 -0700
tree ab668b163c12f23f013e4b4402e703a187afa34f
parent a01b4e237d57b74689576a3d486a2b2b903e74f4

More error checks to avoid div by zero.

Change-Id: I18e5b72d02bf5420c14334d3a03f18fa40572d31

services/sensorservice/vec.h

diff --git a/services/sensorservice/vec.h b/services/sensorservice/vec.h
index f74ccc5..24f30ff 100644
--- a/services/sensorservice/vec.h
+++ b/services/sensorservice/vec.h
@@ -212,6 +212,15 @@
     typename TYPE,
     size_t SIZE
 >
+TYPE PURE length_squared(const V<TYPE, SIZE>& v) {
+    return dot_product(v, v);
+}
+
+template <
+    template<typename T, size_t S> class V,
+    typename TYPE,
+    size_t SIZE
+>
 V<TYPE, SIZE> PURE normalize(const V<TYPE, SIZE>& v) {
     return v * (1/length(v));
 }