1 files changed, 33 insertions, 0 deletions
diff --git a/common/vec3.c b/common/vec3.c
new file mode 100644
index 0000000000..12c33179c2
--- /dev/null
+++ b/common/vec3.c
@@ -0,0 +1,33 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "common.h"
+#include "math.h"
+#include "math_util.h"
+#include "vec3.h"
+#include "util.h"
+
+void vec3_scalar_mul(vec3_t v, float c)
+{
+	v[X] *= c;
+	v[Y] *= c;
+	v[Z] *= c;
+}
+
+float vec3_dot(const vec3_t v, const vec3_t w)
+{
+	return v[X] * w[X] + v[Y] * w[Y] + v[Z] * w[Z];
+}
+
+float vec3_norm_squared(const vec3_t v)
+{
+	return vec3_dot(v, v);
+}
+
+float vec3_norm(const vec3_t v)
+{
+	return sqrtf(vec3_norm_squared(v));
+}
+