public void PremulAndSetInto(BuffVector2d v)
{
double x = v.getX() * getM00() + v.getY() * getM10();
double y = v.getX() * getM01() + v.getY() * getM11();
v.set(x, y);
}
public void MulAndSetInto(BuffVector2d v)
{
double x = getM00() * v.getX() + getM01() * v.getY();
double y = getM10() * v.getX() + getM11() * v.getY();
v.set(x, y);
}
public Vector2d Premul(BuffVector2d v)
{
double x = v.getX() * getM00() + v.getY() * getM10();
double y = v.getX() * getM01() + v.getY() * getM11();
return(new Vector2d(x, y));
}
public Vector2d Mul(BuffVector2d v)
{
double x = getM00() * v.getX() + getM01() * v.getY();
double y = getM10() * v.getX() + getM11() * v.getY();
return(new Vector2d(x, y));
}
public void PremulAndSetInto(BuffVector2 v)
{
if (v is BuffVector2d)
{
this.PremulAndSetInto((BuffVector2d)v);
}
else
{
BuffVector2d _v = new BuffVector2d(v);
this.PremulAndSetInto(_v);
_v.getInto(v);
}
}
public void PremulAndSetInto(BuffVector2d v)
{
v.set(v.getX() * getM00() + v.getY() * getM10(),
v.getX() * getM01() + v.getY() * getM11());
}
public void MulAndSetInto(BuffVector2d v)
{
v.set(getM00() * v.getX() + getM01() * v.getY(),
getM10() * v.getX() + getM11() * v.getY());
}
public Vector2d Premul(BuffVector2d v)
{
return(new Vector2d(v.getX() * getM00() + v.getY() * getM10(),
v.getX() * getM01() + v.getY() * getM11()));
}
public Vector2d Mul(BuffVector2d v)
{
return(new Vector2d(getM00() * v.getX() + getM01() * v.getY(),
getM10() * v.getX() + getM11() * v.getY()));
}
public double AngleTo(BuffVector2d other)
{
// http://stackoverflow.com/questions/2150050/finding-signed-angle-between-vectors
return(Math.atan2(getX() * other.getY() - getY() * other.getX(),
getX() * other.getX() + getY() * other.getY()));
}
