104 lines
2.7 KiB
C++
104 lines
2.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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//=============================================================================
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//
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// Helper math functions
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//
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//=============================================================================
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#ifndef AGS_SHARED_UTIL_MATH_H
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#define AGS_SHARED_UTIL_MATH_H
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#include "common/std/limits.h"
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#include "ags/lib/std.h"
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namespace AGS3 {
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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namespace AGS {
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namespace Shared {
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namespace Math {
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template <class T>
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inline const T &Max(const T &a, const T &b) {
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return a < b ? b : a;
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}
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template <class T>
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inline const T &Min(const T &a, const T &b) {
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return a < b ? a : b;
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}
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template <class T>
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inline const T &Clamp(const T &val, const T &floor, const T &ceil) {
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return Max<T>(floor, Min<T>(val, ceil));
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}
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template <class T>
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inline void ClampLength(T &from, T &length, const T &floor, const T &height) {
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if (from < floor) {
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length -= floor - from;
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from = floor;
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} else if (from >= floor + height) {
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from = floor + height;
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length = 0;
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}
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length = Max<T>(length, 0);
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length = Min<T>(length, height - from);
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}
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// Get a measure of how value A is greater than value B;
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// if A is smaller than or equal to B, returns 0.
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template <class T>
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inline T Surplus(const T &larger, const T &smaller) {
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return larger > smaller ? larger - smaller : 0;
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}
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// Tests if the big-type value is in range of the result type;
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// returns same value converted if it's in range, or provided replacement if it's not.
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template <typename T, typename TBig>
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inline T InRangeOrDef(const TBig &val, const T &def) {
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return (val >= std::numeric_limits<T>::min() && val <= std::numeric_limits<T>::max()) ?
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static_cast<T>(val) : def;
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}
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inline float RadiansToDegrees(float rads) {
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return rads * (float)(180.0 / M_PI);
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}
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inline float DegreesToRadians(float deg) {
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return deg * (float)(M_PI / 180.0);
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}
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} // namespace Math
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} // namespace Shared
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} // namespace AGS
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} // namespace AGS3
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#endif
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