mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-22 06:06:50 +00:00
204 lines
3.4 KiB
C++
204 lines
3.4 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#ifndef NVECTOR_H
|
|
#define NVECTOR_H
|
|
#ifdef _WIN32
|
|
#pragma once
|
|
#endif
|
|
|
|
|
|
#include <math.h>
|
|
|
|
|
|
#define NVectorN NVector<N>
|
|
#define NVector3 NVector<3>
|
|
|
|
|
|
// N-dimensional vector.
|
|
template<int N>
|
|
class NVector
|
|
{
|
|
public:
|
|
|
|
NVectorN() {}
|
|
|
|
float& operator[]( int i );
|
|
float const& operator[]( int i ) const;
|
|
|
|
float Dot( NVectorN const &b ) const;
|
|
NVectorN Cross( NVectorN const &b ) const;
|
|
NVectorN Normalize() const;
|
|
float Length() const;
|
|
|
|
NVectorN operator-() const;
|
|
NVectorN operator+( NVectorN const &b ) const;
|
|
NVectorN const &operator+=( NVectorN const &b );
|
|
NVectorN operator-( NVectorN const &b ) const;
|
|
NVectorN operator*( float val ) const;
|
|
|
|
|
|
// Static helpers.
|
|
public:
|
|
|
|
static NVectorN SetupNVectorNull(); // Returns a vector of all zeros.
|
|
|
|
|
|
public:
|
|
|
|
float v[N];
|
|
};
|
|
|
|
|
|
template<int N>
|
|
inline float NDot( NVector<N> const &a, NVector<N> const &b )
|
|
{
|
|
float ret = 0;
|
|
for( int i=0; i < N; i++ )
|
|
ret += a.v[i] * b.v[i];
|
|
return ret;
|
|
}
|
|
|
|
template<int N>
|
|
Vector& ToVec( NVector<N> &vec ) {assert( N >= 3 ); return *((Vector*)&vec);}
|
|
|
|
template<int N>
|
|
Vector const& ToVec( NVector<N> const &vec ){assert( N >= 3 ); return *((Vector const*)&vec);}
|
|
|
|
NVector<3>& ToNVec( Vector &vec ) {return *((NVector<3>*)&vec);}
|
|
NVector<3> const& ToNVec( Vector const &vec ) {return *((NVector<3> const*)&vec);}
|
|
|
|
|
|
// ------------------------------------------------------------------------------------ //
|
|
// NVector inlines.
|
|
// ------------------------------------------------------------------------------------ //
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::SetupNVectorNull()
|
|
{
|
|
NVector<N> ret;
|
|
memset( ret.v, 0, sizeof(float)*N );
|
|
return ret;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
float& NVectorN::operator[]( int i )
|
|
{
|
|
assert( i >= 0 && i < N );
|
|
return v[i];
|
|
}
|
|
|
|
|
|
template<int N>
|
|
float const& NVectorN::operator[]( int i ) const
|
|
{
|
|
assert( i >= 0 && i < N );
|
|
return v[i];
|
|
}
|
|
|
|
|
|
template<int N>
|
|
float NVectorN::Dot( NVectorN const &b ) const
|
|
{
|
|
float ret = 0;
|
|
|
|
for( int i=0; i < N; i++ )
|
|
ret += v[i]*b.v[i];
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::Cross( NVectorN const &b ) const
|
|
{
|
|
NVector<N> ret;
|
|
NMatrix<N-1> mat;
|
|
|
|
for( int i=0; i < N; i++ )
|
|
{
|
|
for( y=0; y < N; y++ )
|
|
for( x=0; x < N; x++ )
|
|
mat.m[y][x] =
|
|
|
|
ret.v[i] = v[i]*b.v[i];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::Normalize() const
|
|
{
|
|
return *this * (1.0f / Length());
|
|
}
|
|
|
|
|
|
template<int N>
|
|
float NVectorN::Length() const
|
|
{
|
|
return (float)sqrt( Dot(*this) );
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::operator-() const
|
|
{
|
|
NVectorN ret;
|
|
for( int i=0; i < N; i++ )
|
|
ret.v[i] = -v[i];
|
|
return ret;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::operator+( NVectorN const &b ) const
|
|
{
|
|
NVectorN ret;
|
|
|
|
for( int i=0; i < N; i++ )
|
|
ret.v[i] = v[i]+b.v[i];
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN const &NVectorN::operator+=( NVectorN const &b )
|
|
{
|
|
for( int i=0; i < N; i++ )
|
|
v[i] += b.v[i];
|
|
return *this;
|
|
}
|
|
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::operator-( NVectorN const &b ) const
|
|
{
|
|
NVectorN ret;
|
|
|
|
for( int i=0; i < N; i++ )
|
|
ret.v[i] = v[i]-b.v[i];
|
|
|
|
return ret;
|
|
}
|
|
|
|
template<int N>
|
|
NVectorN NVectorN::operator*( float val ) const
|
|
{
|
|
NVectorN ret;
|
|
for( int i=0; i < N; i++ )
|
|
ret.v[i] = v[i] * val;
|
|
return ret;
|
|
}
|
|
|
|
|
|
#endif // NVECTOR_H
|
|
|