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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
//=============================================================================
//
// Helper math functions
//
//=============================================================================
#ifndef AGS_SHARED_UTIL_MATH_H
#define AGS_SHARED_UTIL_MATH_H
#include "common/std/limits.h"
#include "ags/lib/std.h"
namespace AGS3 {
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
namespace AGS {
namespace Shared {
namespace Math {
template <class T>
inline const T &Max(const T &a, const T &b) {
return a < b ? b : a;
}
template <class T>
inline const T &Min(const T &a, const T &b) {
return a < b ? a : b;
}
template <class T>
inline const T &Clamp(const T &val, const T &floor, const T &ceil) {
return Max<T>(floor, Min<T>(val, ceil));
}
template <class T>
inline void ClampLength(T &from, T &length, const T &floor, const T &height) {
if (from < floor) {
length -= floor - from;
from = floor;
} else if (from >= floor + height) {
from = floor + height;
length = 0;
}
length = Max<T>(length, 0);
length = Min<T>(length, height - from);
}
// Get a measure of how value A is greater than value B;
// if A is smaller than or equal to B, returns 0.
template <class T>
inline T Surplus(const T &larger, const T &smaller) {
return larger > smaller ? larger - smaller : 0;
}
// Tests if the big-type value is in range of the result type;
// returns same value converted if it's in range, or provided replacement if it's not.
template <typename T, typename TBig>
inline T InRangeOrDef(const TBig &val, const T &def) {
return (val >= std::numeric_limits<T>::min() && val <= std::numeric_limits<T>::max()) ?
static_cast<T>(val) : def;
}
inline float RadiansToDegrees(float rads) {
return rads * (float)(180.0 / M_PI);
}
inline float DegreesToRadians(float deg) {
return deg * (float)(M_PI / 180.0);
}
} // namespace Math
} // namespace Shared
} // namespace AGS
} // namespace AGS3
#endif
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