Added Astaroth 2.0

src/core/math_utils.h

@@ -0,0 +1,91 @@
+/*
+    Copyright (C) 2014-2018, Johannes Pekkilae, Miikka Vaeisalae.
+
+    This file is part of Astaroth.
+
+    Astaroth is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Astaroth is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Astaroth.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file
+ * \brief Brief info.
+ *
+ * Detailed info.
+ *
+ */
+#pragma once
+#include <math.h>   // isnan, isinf
+#include <stdlib.h> // rand
+
+template <class T>
+static inline const T
+max(const T& a, const T& b)
+{
+    return a > b ? a : b;
+}
+
+template <class T>
+static inline const T
+min(const T& a, const T& b)
+{
+    return a < b ? a : b;
+}
+
+template <class T>
+static inline const T
+sum(const T& a, const T& b)
+{
+    return a + b;
+}
+
+template <class T>
+static inline const T
+is_valid(const T& val)
+{
+    if (isnan(val) || isinf(val))
+        return false;
+    else
+        return true;
+}
+
+template <class T>
+static inline const T
+clamp(const T& val, const T& min, const T& max)
+{
+    return val < min ? min : val > max ? max : val;
+}
+
+static inline AcReal
+randr()
+{
+    return AcReal(rand()) / AcReal(RAND_MAX);
+}
+
+static inline int3
+operator+(const int3& a, const int3& b)
+{
+    return (int3){a.x + b.x, a.y + b.y, a.z + b.z};
+}
+
+static inline int3
+operator-(const int3& a, const int3& b)
+{
+    return (int3){a.x - b.x, a.y - b.y, a.z - b.z};
+}
+
+static inline bool
+is_power_of_two(const unsigned val)
+{
+    return val && !(val & (val - 1));
+}