diff options
Diffstat (limited to 'StarsEx/Fix.h')
| -rw-r--r-- | StarsEx/Fix.h | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/StarsEx/Fix.h b/StarsEx/Fix.h deleted file mode 100644 index 84c5ac3..0000000 --- a/StarsEx/Fix.h +++ /dev/null @@ -1,120 +0,0 @@ -/* Starshatter: The Open Source Project - Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors - Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors - Copyright (c) 1997-2006, Destroyer Studios LLC. - - AUTHOR: John DiCamillo - - - OVERVIEW - ======== - Fixed point number class with 16 bits of fractional precision -*/ - -#ifndef Fix_h -#define Fix_h - -// +--------------------------------------------------------------------+ - -#include "Types.h" - -// +--------------------------------------------------------------------+ - -const double fix_sixty_five=65536.0; - -inline int fast_f2i(double d) -{ - return static_cast<int>(d); -} - -// +--------------------------------------------------------------------+ - -class fix -{ -public: - static const char* TYPENAME() { return "fix"; } - - enum FixDef { Precision=16, IntMask=0xffff0000, FractMask=0x0000ffff }; - static const fix one; - static const fix two; - static const fix three; - static const fix five; - static const fix ten; - - fix() : val(0) { } - fix(int n) : val(n<<Precision) { } - fix(double d) : val(static_cast<long>(d * fix_sixty_five)) { } - fix(const fix& f) : val(f.val) { } - - // conversion operators: - operator int () const { return (val>>Precision); } - operator float () const { return ((float) val) / ((float) fix_sixty_five); } - operator double() const { return ((double) val) / fix_sixty_five; } - - // assignment operators: - fix& operator=(const fix& f) { val=f.val; return *this; } - fix& operator=(int n) { val=(n<<Precision); return *this; } - fix& operator=(double d) { val = static_cast<long>(d * fix_sixty_five); return *this; } - - // comparison operators: - int operator==(const fix& f) const { return val==f.val; } - int operator!=(const fix& f) const { return val!=f.val; } - int operator<=(const fix& f) const { return val<=f.val; } - int operator>=(const fix& f) const { return val>=f.val; } - int operator< (const fix& f) const { return val< f.val; } - int operator> (const fix& f) const { return val> f.val; } - - // arithmetic operators: - fix operator+(const fix& f) const { fix r; r.val = val+f.val; return r; } - fix operator-(const fix& f) const { fix r; r.val = val-f.val; return r; } - fix operator*(const fix& f) const { - fix r; - r.val = (val * f.val) >> Precision; - return r; } - fix operator/(const fix& f) const { - fix r; - r.val = (val << Precision) / f.val; - return r; } - fix& operator+=(const fix& f) { val+=f.val; return *this; } - fix& operator-=(const fix& f) { val-=f.val; return *this; } - fix& operator*=(const fix& f) { - val = (val * f.val) >> Precision; - return *this; } - fix& operator/=(const fix& f) { - val = (val << Precision) / f.val; - return *this; } - - fix operator+(int n) const { fix r; r.val = val+(n<<Precision); return r; } - fix operator-(int n) const { fix r; r.val = val-(n<<Precision); return r; } - fix operator*(int n) const { fix r; r.val = val*n; return r; } - fix operator/(int n) const { fix r; r.val = val/n; return r; } - fix& operator+=(int n) { val+=(n<<Precision); return *this; } - fix& operator-=(int n) { val-=(n<<Precision); return *this; } - fix& operator*=(int n) { val*=n; return *this; } - fix& operator/=(int n) { val/=n; return *this; } - - fix operator+(double d) const { fix f(d); return (*this)+f; } - fix operator-(double d) const { fix f(d); return (*this)-f; } - fix operator*(double d) const { fix f(d); return (*this)*f; } - fix operator/(double d) const { fix f(d); return (*this)/f; } - fix& operator+=(double d) { fix f(d); val+=f.val; return *this; } - fix& operator-=(double d) { fix f(d); val-=f.val; return *this; } - fix& operator*=(double d) { val*=static_cast<long>(d); return *this; } - fix& operator/=(double d) { val/=static_cast<long>(d); return *this; } - - // misc. functions: - fix truncate() const { fix r; r.val = val&IntMask; return r; } - fix fraction() const { fix r; r.val = val-truncate().val; return r; } - fix floor() const { fix r; r.val = val&IntMask; return r; } - fix ceil() const { fix r; r.val = (val+FractMask)&IntMask; return r; } - fix adjust_up() const { fix r; r.val = val+FractMask; return r; } - fix adjust_down() const { fix r; r.val = val-FractMask; return r; } - - fix muldiv(const fix& num, const fix& den) const { return (*this) * num / den; } - - // data: - long val; -}; - -#endif // Fix_h - |