177 lines
3.3 KiB
C++
177 lines
3.3 KiB
C++
#pragma once
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#ifndef TUTIL_INCLUDED
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#define TUTIL_INCLUDED
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#include "tcommon.h"
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#include <math.h>
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#ifdef _WIN32
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#include <windows.h>
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#include <winbase.h>
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#endif
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//! Type definition for a pair of double.
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typedef std::pair<double, double> DoublePair;
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//! Type definition for a pair of integer.
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typedef std::pair<int, int> IntPair;
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//! Square of x.
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/*!
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\par x val to square
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*/
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template <class T>
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inline T sq(T x)
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{
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return x * x;
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}
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//! Calculates the floor of a value.
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/*!
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Return the largest integer that is less than or equal to x.
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\par x val to floor
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\ret largest integer that is less than or equal to x
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*/
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inline int tfloor(double x)
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{
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return ((int)(x) > (x) ? (int)(x)-1 : (int)(x));
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}
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//! Calculates the ceiling of a value.
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/*!
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Return the smallest integer that is greater than or equal to x.
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\par x val to floor
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\ret smallest integer that is greater than or equal to x.
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*/
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inline int tceil(double x)
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{
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return ((int)(x) < (x) ? (int)(x) + 1 : (int)(x));
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}
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//! Check if value is an integer.
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/*!
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Return largest integer that is less than or equal to x
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\par x val to test
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\ret true if val is integer
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*/
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inline bool isInt(double x)
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{
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return (int)(x) == (x);
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}
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inline int tfloor(int x, int step)
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{
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return step * (x >= 0 ? (x / step) : -((-1 - x + step) / step));
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}
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inline int tceil(int x, int step)
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{
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return step * (x >= 0 ? ((x + step - 1) / step) : -((-x) / step));
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}
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inline int intLE(double x)
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{
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return tfloor(x);
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}
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inline int intGT(double x)
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{
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return tfloor(x) + 1;
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}
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inline int intLT(double x)
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{
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return tceil(x) - 1;
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}
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inline int intGE(double x)
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{
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return tceil(x);
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}
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//! convert radiant to degree
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/*!
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Convert an angle from radiant to angle.
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\par angle in radiant
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\ret angle in degree
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*/
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inline double rad2degree(double rad)
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{
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return rad * M_180_PI;
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}
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//! convert degree to radiant
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/*!
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Convert an angle from degree to radiant.
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\par angle in degree
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\ret angle in radiant
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*/
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inline double degree2rad(double degree)
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{
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return degree * M_PI_180;
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}
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//! Sign of argument.
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/*!
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Return sign of argument.
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\par arg value to test
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\ret -1 if arg is negative, 1 if arg is positive, 0 if arg is zero
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*/
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template <class T>
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inline int tsign(T arg)
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{
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return arg < 0 ? -1 : arg > 0 ? 1 : 0;
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}
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//! Check if two values are very similar.
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/*!
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Check if two values are very similar.
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\par a first value
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\par b second value
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\par err max distance from value
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\ret bool if value are very similar.
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*/
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inline bool areAlmostEqual(double a, double b, double err = TConsts::epsilon)
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{
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return fabs(a - b) < err;
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}
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//! Check if two values are very similar.
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/*!
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Check if two values are very similar.
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\par a first value
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\par b second value
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\par err max distance from value
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\ret bool if value are very similar.
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*/
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template <class T>
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inline bool areAlmostEqual(const T &a, const T &b, double err = TConsts::epsilon)
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{
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return tdistance(a, b) < err;
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}
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struct TDeleteObjectFunctor {
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template <typename T>
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void operator()(T *ptr)
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{
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delete ptr;
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}
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};
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//! Clear a container deleting all elements.
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/*!
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Clear a container, but before recall delete for all elements.
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\par c container
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\note the code doesn't work with map because it's impossible
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to deduce template
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*/
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template <class T>
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inline void clearPointerContainer(T &c) throw()
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{
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T tmp;
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std::for_each(c.begin(), c.end(), TDeleteObjectFunctor());
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c.swap(tmp);
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}
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#endif
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