public IVector2D Multiply(float scalar)
{
IVector2D r = new Vector2D(X * scalar, Y * scalar);
return r;
}
public IVector2D Negate()
{
IVector2D r = new Vector2D(-X, -Y);
return r;
}
public IVector2D Divide(float divisor)
{
IVector2D r = new Vector2D(X / divisor, Y / divisor);
return r;
}
public IVector2D Add(IVector2D v)
{
IVector2D r = new Vector2D(X + v.X, Y + v.Y);
return r;
}
public IVector2D Substract(IVector2D v)
{
IVector2D r = new Vector2D(X - v.X, Y - v.Y);
return r;
}
public IVector2D Rotate90()
{
IVector2D r = new Vector2D(-Y, X);
return r;
}
public IVector2D Rotate(float degrees)
{
float radians = degrees.ToRadians();
var sine = (float)Math.Sin(radians);
var cosine = (float)Math.Cos(radians);
IVector2D r = new Vector2D(X * cosine - Y * sine, X * sine - Y * cosine);
return r;
}