Move basic_math.h and vec.h to core directory

Change-Id: I143b7af450ff48d4958b4bc7137b393a2dc0eb64
Signed-off-by: Mateusz Jablonski <mateusz.jablonski@intel.com>

core/helpers/vec.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2017-2019 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+
+template <typename T>
+struct Vec3 {
+    Vec3(T x, T y, T z) : x(x), y(y), z(z) {}
+    Vec3(const Vec3 &v) : x(v.x), y(v.y), z(v.z) {}
+    Vec3(const T *arr) {
+        if (arr == nullptr) {
+            x = y = z = 0;
+        } else {
+            x = arr[0];
+            y = arr[1];
+            z = arr[2];
+        }
+    }
+
+    Vec3 &operator=(const Vec3 &arr) {
+        x = arr.x;
+        y = arr.y;
+        z = arr.z;
+        return *this;
+    }
+
+    Vec3<T> &operator=(const T arr[3]) {
+        x = arr[0];
+        y = arr[1];
+        z = arr[2];
+        return *this;
+    }
+
+    bool operator==(const Vec3<T> &vec) const {
+        return ((x == vec.x) && (y == vec.y) && (z == vec.z));
+    }
+
+    bool operator!=(const Vec3<T> &vec) const {
+        return !operator==(vec);
+    }
+
+    unsigned int getSimplifiedDim() const {
+        if (z > 1) {
+            return 3;
+        }
+        if (y > 1) {
+            return 2;
+        }
+        if (x >= 1) {
+            return 1;
+        }
+        return 0;
+    }
+
+    T x;
+    T y;
+    T z;
+};