diff options
Diffstat (limited to 'debian/fireflies/fireflies-2.08/libgfx/include/gfx/vec2.h')
| -rw-r--r-- | debian/fireflies/fireflies-2.08/libgfx/include/gfx/vec2.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/debian/fireflies/fireflies-2.08/libgfx/include/gfx/vec2.h b/debian/fireflies/fireflies-2.08/libgfx/include/gfx/vec2.h new file mode 100644 index 00000000..11b7ac7f --- /dev/null +++ b/debian/fireflies/fireflies-2.08/libgfx/include/gfx/vec2.h @@ -0,0 +1,158 @@ +#ifndef GFXVEC2_INCLUDED // -*- C++ -*- +#define GFXVEC2_INCLUDED +#if !defined(__GNUC__) +# pragma once +#endif + +/************************************************************************ + + 2D Vector class + + $Id: vec2.h 427 2004-09-27 04:45:31Z garland $ + + ************************************************************************/ + +#include "gfx.h" + +namespace gfx +{ + +template<class T> +class TVec2 { +private: + T elt[2]; + +public: + // Standard constructors + // + TVec2(T s=0) { *this = s; } + TVec2(T x, T y) { elt[0]=x; elt[1]=y; } + + // Copy constructors & assignment operators + template<class U> TVec2(const TVec2<U>& v) { *this = v; } + template<class U> TVec2(const U v[2]) { elt[0]=v[0]; elt[1]=v[1]; } + template<class U> TVec2& operator=(const TVec2<U>& v) + { elt[0]=v[0]; elt[1]=v[1]; return *this; } + TVec2& operator=(T s) { elt[0]=elt[1]=s; return *this; } + + + // Descriptive interface + // + typedef T value_type; + static int dim() { return 2; } + + + // Access methods + // + operator T*() { return elt; } + operator const T*() const { return elt; } + +#ifndef HAVE_CASTING_LIMITS + T& operator[](int i) { return elt[i]; } + T operator[](int i) const { return elt[i]; } + operator const T*() { return elt; } +#endif + + // In-place arithmetic methods + // + inline TVec2& operator+=(const TVec2& v); + inline TVec2& operator-=(const TVec2& v); + inline TVec2& operator*=(T s); + inline TVec2& operator/=(T s); +}; + +//////////////////////////////////////////////////////////////////////// +// +// Method definitions +// +template<class T> inline TVec2<T>& TVec2<T>::operator+=(const TVec2<T>& v) + { elt[0] += v[0]; elt[1] += v[1]; return *this; } + +template<class T> inline TVec2<T>& TVec2<T>::operator-=(const TVec2<T>& v) + { elt[0] -= v[0]; elt[1] -= v[1]; return *this; } + +template<class T> inline TVec2<T>& TVec2<T>::operator*=(T s) + { elt[0] *= s; elt[1] *= s; return *this; } + +template<class T> inline TVec2<T>& TVec2<T>::operator/=(T s) + { elt[0] /= s; elt[1] /= s; return *this; } + +//////////////////////////////////////////////////////////////////////// +// +// Operator defintions +// + +template<class T> +inline TVec2<T> operator+(const TVec2<T> &u, const TVec2<T> &v) + { return TVec2<T>(u[0]+v[0], u[1]+v[1]); } + +template<class T> +inline TVec2<T> operator-(const TVec2<T> &u, const TVec2<T> &v) + { return TVec2<T>(u[0]-v[0], u[1]-v[1]); } + +template<class T> inline TVec2<T> operator-(const TVec2<T> &v) + { return TVec2<T>(-v[0], -v[1]); } + +#if _MSC_VER>=1200 +// Normally, we use the <class T, class N> construct below to allow the scalar +// argument to be different than the template type. This, for example, allows +// the user to write things like v/2. Unfortunately, Microsoft VC6.0 (aka +// v1200) gets confused by this. We used to include explicit versions for the +// case of int's, but this was causing silent (and incorrect) coercion of +// floats to ints. +// + + template<class T> inline TVec2<T> operator*(T s, const TVec2<T> &v) + { return TVec2<T>(v[0]*s, v[1]*s); } + template<class T> inline TVec2<T> operator*(const TVec2<T> &v, T s) + { return s*v; } + + template<class T> inline TVec2<T> operator/(const TVec2<T> &v, T s) + { return TVec2<T>(v[0]/s, v[1]/s); } + +#else + template<class T, class N> inline TVec2<T> operator*(N s, const TVec2<T> &v) + { return TVec2<T>(v[0]*s, v[1]*s); } + template<class T, class N> inline TVec2<T> operator*(const TVec2<T> &v, N s) + { return s*v; } + + template<class T, class N> inline TVec2<T> operator/(const TVec2<T> &v, N s) + { return TVec2<T>(v[0]/s, v[1]/s); } +#endif + +template<class T> inline T operator*(const TVec2<T> &u, const TVec2<T>& v) + { return u[0]*v[0] + u[1]*v[1]; } + +template<class T> inline TVec2<T> perp(const TVec2<T> &v) + { return TVec2<T>(v[1], -v[0]); } + +template<class T> +inline std::ostream &operator<<(std::ostream &out, const TVec2<T> &v) + { return out << v[0] << " " << v[1]; } + +template<class T> +inline std::istream &operator>>(std::istream &in, TVec2<T>& v) + { return in >> v[0] >> v[1]; } + + +//////////////////////////////////////////////////////////////////////// +// +// Misc. function definitions +// + +template<class T> inline T norm2(const TVec2<T>& v) { return v*v; } +template<class T> inline T norm(const TVec2<T>& v) { return sqrt(norm2(v)); } + +template<class T> inline void unitize(TVec2<T>& v) +{ + T l = norm2(v); + if( l!=1.0 && l!=0.0 ) v /= sqrt(l); +} + +typedef TVec2<double> Vec2; +typedef TVec2<float> Vec2f; + +} // namespace gfx + +// GFXVEC2_INCLUDED +#endif |