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JVector.h
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JVector.h
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/////
//
// JVector.h
// declaration of class JVector, a 2D vector class
#ifndef __JVECTOR_H__
#define __JVECTOR_H__
//#include "JMDefs.h"
#include "assert.h"
#include "DungeonConstants.h"
#define VEC_EXPAND(v) (v).x, (v).y
template<class T>class TVector2
{
// Member variables
public:
T x;
T y;
// Member functions
public:
TVector2() {};
TVector2( const T inx, const T iny ):x(inx), y(iny) {};
TVector2( const TVector2 &in ):x(in.x), y(in.y) {};
virtual ~TVector2() {};
// Array indexing
const T &operator [] (unsigned int i)
{
assert (i<2);
return *(&x+i);
}
// Array indexing
const T &operator [] (unsigned int i) const
{
assert (i<2);
return *(&x+i);
}
// Add another JVector to this one
TVector2 &operator += ( const TVector2 &in )
{
x += in.x;
y += in.y;
return *this;
}
// subtract another JVector from this one
TVector2 &operator -= ( const TVector2 &in )
{
x -= in.x;
y -= in.y;
return *this;
}
// multiply vector be int scalar
TVector2 &operator *= ( T &i )
{
x *= i;
y *= i;
return *this;
}
// multiply vector be int scalar
TVector2 &operator *= ( T i )
{
x *= i;
y *= i;
return *this;
}
// integer divide vector by scalar
TVector2 &operator /= ( T &i )
{
assert( i != 0 );
x /= i;
y /= i;
return *this;
}
// negate this vector
friend TVector2 operator - ( const TVector2 &in )
{
return( JVector(-in.x, -in.y) );
}
// subtract 2 vectors
friend TVector2 operator - ( const TVector2 &a, const TVector2 &b )
{
TVector2 vReturn(a);
vReturn -= b;
return(vReturn);
}
// subtract 2 vectors
friend TVector2 operator + ( const TVector2 &a, const TVector2 &b )
{
TVector2 vReturn(a);
vReturn += b;
return(vReturn);
}
// multiply vector by scalar
friend TVector2 operator * ( const TVector2 &a, T &i )
{
return(JVector(a.x * i, a.y * i));
}
// multiply vector by scalar
friend TVector2 operator * ( T &i, const TVector2 &a )
{
return(JVector(a.x * i, a.y * i));
}
// multiply vector by scalar
friend TVector2 operator / ( const TVector2 &a, int &i )
{
assert( i != 0 );
return(TVector2(a.x / i, a.y / i));
}
// test equality
friend bool operator == ( const TVector2 &a, const TVector2 &b )
{
return((a.x == b.x) && (a.y == b.y));
}
// test inequality
friend bool operator != ( const TVector2 &a, const TVector2 &b )
{
return((a.x != b.x) || (a.y != b.y));
}
bool IsInWorld()
{
return( x > 0 && x < ( DUNG_WIDTH - 1 )
&& y > 0 && y < ( DUNG_HEIGHT - 1 ));
}
void Init( T inx=0, T iny=0 )
{
x = inx;
y = iny;
}
bool IsZero()
{
return((x == 0) && (y == 0));
}
float Length()
{
return( (x*x) + (y*y) );
}
void Norm()
{
float len = Length();
if( len != 0.0f )
{
x /= len;
y /= len;
}
}
};
typedef TVector2<int> JIVector;
typedef TVector2<float> JVector;
typedef TVector2<float> JFVector;
#endif //__JVECTOR_H__