File content as of revision 0:3d0db4e183ee:

#include "Vector.h"

Vector::Vector()
{   // constructor
    this->set((float)0,(float)0);
}

Vector::Vector(float fX, float fY)
{
    this->set(fX, fY);
}

void Vector::set(float fX, float fY)
{
    x=fX;
    y=fY;
}
void Vector::set(int nX, int nY)
{
    this->set((float)nX, (float)nY);
}

float Vector::getSize()
{   // get the size of the vector
    return(sqrt(x*x+y*y));
}

bool Vector::isLeft()  { return(x<0); }
bool Vector::isRight() { return(x>0); }
bool Vector::isUp()    { return(y<0); }
bool Vector::isDown()  { return(y>0); }


void Vector::add(float fAdd)
{   // add the size of the vector by adding to its size
    float fSize=getSize();
    float fSizeNew=fSize+fAdd;
    if(fSize!=0)
    {
        x=x * (fSizeNew/fSize);
        y=y * (fSizeNew/fSize);
    }
    else
    {   // in case of zero lenght, default to addition in first quadrant.
        x=sqrt(0.5 * fAdd * fAdd);
        y=x;
    }
}

void Vector::add(Vector vAdd)
{
    x+=vAdd.x;
    y+=vAdd.y;
}

void Vector::multiply(Vector vMult)
{   // multiply the vector by means of the other vector
    x*=vMult.x;
    y*=vMult.y;
}