public int LengthSq( Vector2I b )
{
return ( this.x - b.x ) * ( this.x - b.x ) + ( this.y - b.y ) * ( this.y - b.y );
}
public Vector2F( Vector2I a )
{
this.x = (float)a.x;
this.y = (float)a.y;
}
public bool IsParallel( Vector2I b )
{
return this.cross( b ) == 0;
}
public bool IsVertical( Vector2I b )
{
return this.dot( b ) == 0;
}
public bool IsInCircle( Vector2I centerPos, float radius )
{
return IsInCircle( new Vector2F( centerPos.x, centerPos.y ), radius );
}
public bool IsObtuse( Vector2I b )
{
return this.cross( b ) < 0;
}
public bool IsAcute( Vector2I b )
{
return this.cross( b ) > 0;
}
public int dot( Vector2I v )
{
return this.x * v.x + this.y * v.y;
}
public int cross( Vector2I v )
{
return this.x * v.y - this.y * v.x;
}
public static void Swap( ref Vector2I a, ref Vector2I b )
{
Vector2I hoge = a;
a = b;
b = hoge;
}
public bool IsInCircle( Vector2I a, float radius )
{
return IsInCircle( new Vector2F( a.x, a.y ), radius );
}