198 lines
4.5 KiB
C++
198 lines
4.5 KiB
C++
/*
|
|
* This file is part of libgim.
|
|
*
|
|
* libgim 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.
|
|
*
|
|
* libgim 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 libgim. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Copyright 2011-2012 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
|
|
#include "range.hpp"
|
|
|
|
#include "debug.hpp"
|
|
#include "maths.hpp"
|
|
|
|
#include <limits>
|
|
#include <cstdint>
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
using namespace std;
|
|
using namespace util;
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
template <typename T>
|
|
range<T>::range (const json::node &node) {
|
|
if (node.is_string () && (node == "UNIT" ||
|
|
node == "unit")) {
|
|
min = UNIT.min;
|
|
max = UNIT.max;
|
|
} else if (node.is_string () && (node == "UNLIMITED" ||
|
|
node == "unlimited")) {
|
|
min = UNLIMITED.min;
|
|
max = UNLIMITED.max;
|
|
} else {
|
|
min = node[0].as_number ();
|
|
max = node[1].as_number ();
|
|
}
|
|
|
|
sanity ();
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
range<T>::range (T _min, T _max):
|
|
min (_min),
|
|
max (_max)
|
|
{ sanity (); }
|
|
|
|
|
|
template <typename T>
|
|
bool
|
|
range<T>::contains (T val) const
|
|
{ return val >= min && val <= max; }
|
|
|
|
|
|
template <typename T>
|
|
bool
|
|
range<T>::contains (const range <T> &r) const
|
|
{ return r.min >= min && r.max <= max; }
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
range<T>::sanity (void) const
|
|
{ CHECK (min <= max); }
|
|
|
|
|
|
namespace util {
|
|
template <>
|
|
void
|
|
range<double>::sanity (void) const {
|
|
if (std::isnan (min) || std::isnan (max))
|
|
return;
|
|
CHECK (min <= max);
|
|
}
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
T
|
|
range<T>::clamp (T val) const
|
|
{ return std::max (min, std::min (val, max)); }
|
|
|
|
|
|
template <typename T>
|
|
void
|
|
range<T>::expand (T val) {
|
|
// The arguments to min and max are such that expansion from initial NaN
|
|
// values should change both min and max to be that value.
|
|
min = std::min (val, min);
|
|
max = std::max (val, max);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
double
|
|
range<T>::normalise (T val) const {
|
|
CHECK_SOFT (val >= min && val <= max);
|
|
return ((double)val - min) /
|
|
((double)max - min);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
range<T>&
|
|
range<T>::operator*= (T val) {
|
|
min *= val;
|
|
max *= val;
|
|
|
|
return *this;
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
range<T>
|
|
range<T>::operator* (T val) const {
|
|
return range<T> (min * val, max * val);
|
|
}
|
|
|
|
|
|
namespace util {
|
|
template <>
|
|
double
|
|
range<double>::random (void) const {
|
|
double pos = ::rand () / (double)(RAND_MAX);
|
|
return (max - min) * pos + min;
|
|
}
|
|
|
|
template <>
|
|
float
|
|
range<float>::random (void) const {
|
|
float pos = ::rand () / (float)(RAND_MAX);
|
|
return (max - min) * pos + min;
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
T
|
|
range<T>::random (void) const {
|
|
return min + (T)::rand () % (max - min);
|
|
}
|
|
|
|
|
|
namespace util {
|
|
template <>
|
|
bool
|
|
range<float>::operator ==(const range<float> &rhs) const
|
|
{ return almost_equal (min, rhs.min) &&
|
|
almost_equal (max, rhs.max); }
|
|
|
|
|
|
template <>
|
|
bool
|
|
range<double>::operator ==(const range<double> &rhs) const
|
|
{ return almost_equal (min, rhs.min) &&
|
|
almost_equal (max, rhs.max); }
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
bool
|
|
range<T>::operator ==(const range<T> &rhs) const
|
|
{ return min == rhs.min && max == rhs.max; }
|
|
|
|
|
|
template <typename T>
|
|
const range<T>
|
|
range<T>::UNLIMITED (numeric_limits <T>::is_integer ? numeric_limits <T>::min () :
|
|
-numeric_limits <T>::infinity (),
|
|
numeric_limits <T>::is_integer ? numeric_limits <T>::max () :
|
|
numeric_limits <T>::infinity ());
|
|
|
|
template <typename T>
|
|
const range<T>
|
|
range<T>::UNIT (0.0, 1.0);
|
|
|
|
|
|
namespace util {
|
|
template struct range<double>;
|
|
template struct range<float>;
|
|
template struct range<uint8_t>;
|
|
template struct range<uint16_t>;
|
|
template struct range<uint32_t>;
|
|
template struct range<uint64_t>;
|
|
}
|