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+/****************************************************************************
+**
+** Copyright (C) 2009-2011 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef INCLUDED_QT3DS_MATH_CPP_MISC_H
+#define INCLUDED_QT3DS_MATH_CPP_MISC_H
+
+inline bool nvIsPowerOfTwo(unsigned int i)
+{
+ return (i & (i - 1)) == 0;
+}
+
+inline float nvDegToRadf(float d)
+{
+ return d * 3.14159265358979323846f / 180.0f;
+}
+
+inline float nvRadToDegf(float r)
+{
+ return r * 180.0f / 3.14159265358979323846f;
+}
+
+/*
+ 'mod' differs from '%' in that it behaves correctly when either the
+ numerator or denominator is negative.
+*/
+
+inline int nvMod(int n, int d)
+{
+ int m = n % d;
+ return (((m < 0) && (d > 0)) || ((m > 0) && (d < 0))) ? (m + d) : m;
+}
+
+inline int nvAbs(int n)
+{
+ if (n < 0)
+ return -n;
+ return n;
+}
+
+inline int nvSign(int n)
+{
+ if (n > 0)
+ return 1;
+ if (n < 0)
+ return -1;
+ return 0;
+}
+
+/*
+ This returns the smallest amplitude value x such that
+ nvMod(b + x, m) == a
+*/
+
+inline int nvDifMod(int a, int b, int m)
+{
+
+ int x1 = a - b;
+ int x2 = (x1 > 0) ? x1 - m : x1 + m;
+ return (nvAbs(x1) < nvAbs(x2)) ? x1 : x2;
+}
+
+inline float nvWrapf(float a, float min, float max)
+{
+
+ assert(max > min);
+
+ float d = max - min;
+ float s = a - min;
+ float q = s / d;
+ float m = q - floorf(q);
+ return m * d + min;
+}
+
+inline float nvClampf(float a, float min, float max)
+{
+ return (a < min) ? min : ((a > max) ? max : a);
+}
+
+inline int nvClampi(int i, int min, int max)
+{
+ return (i < min) ? min : ((i > max) ? max : i);
+}
+
+inline float nvGaussian(float x, float s)
+{
+ float c = s * sqrtf(2.0f * 3.14159265358979323846f);
+ return expf(-(x * x) / (2.0f * s * s)) / c;
+}
+
+inline float nvLerpf(float a, float b, float t)
+{
+ return a * (1.0f - t) + b * t;
+}
+
+inline float nvEasef(float t)
+{
+
+ float t_2 = t * t;
+ float t_3 = t_2 * t;
+ return 3.0f * t_2 - 2.0f * t_3;
+}
+
+#endif