100 lines
1.8 KiB
C++
100 lines
1.8 KiB
C++
//***********************************************************
|
|
//
|
|
// Name: CVector2D.h
|
|
// Author: Matei Zaharia
|
|
//
|
|
// Description: Provides an interface for a vector in R4 and
|
|
// allows vector and scalar operations on it
|
|
//
|
|
//***********************************************************
|
|
|
|
#ifndef VECTOR2D_H
|
|
#define VECTOR2D_H
|
|
|
|
|
|
#include <math.h>
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// CVector2D:
|
|
class CVector2D
|
|
{
|
|
public:
|
|
CVector2D() {}
|
|
CVector2D(float x,float y) { X=x; Y=y; }
|
|
CVector2D(const CVector2D& p) { X=p.X; Y=p.Y; }
|
|
|
|
operator float*() {
|
|
return &X;
|
|
}
|
|
|
|
operator const float*() const {
|
|
return &X;
|
|
}
|
|
|
|
CVector2D operator-() const {
|
|
return CVector2D(-X, -Y);
|
|
}
|
|
|
|
CVector2D operator+(const CVector2D& t) const {
|
|
return CVector2D(X+t.X, Y+t.Y);
|
|
}
|
|
|
|
CVector2D operator-(const CVector2D& t) const {
|
|
return CVector2D(X-t.X, Y-t.Y);
|
|
}
|
|
|
|
CVector2D operator*(float f) const {
|
|
return CVector2D(X*f, Y*f);
|
|
}
|
|
|
|
CVector2D operator/(float f) const {
|
|
float inv=1.0f/f;
|
|
return CVector2D(X*inv, Y*inv);
|
|
}
|
|
|
|
CVector2D& operator+=(const CVector2D& t) {
|
|
X+=t.X; Y+=t.Y;
|
|
return *this;
|
|
}
|
|
|
|
CVector2D& operator-=(const CVector2D& t) {
|
|
X-=t.X; Y-=t.Y;
|
|
return *this;
|
|
}
|
|
|
|
CVector2D& operator*=(float f) {
|
|
X*=f; Y*=f;
|
|
return *this;
|
|
}
|
|
|
|
CVector2D& operator/=(float f) {
|
|
float invf=1.0f/f;
|
|
X*=invf; Y*=invf;
|
|
return *this;
|
|
}
|
|
|
|
float Dot(const CVector2D& a) const {
|
|
return X*a.X + Y*a.Y;
|
|
}
|
|
|
|
float LengthSquared() const {
|
|
return Dot(*this);
|
|
}
|
|
|
|
float Length() const {
|
|
return (float) sqrt(LengthSquared());
|
|
}
|
|
|
|
void Normalize() {
|
|
float mag=Length();
|
|
X/=mag; Y/=mag;
|
|
}
|
|
|
|
public:
|
|
float X, Y;
|
|
};
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#endif
|