public double Distance(double2 v)
{
double2 delta = v - this;
double len = delta.Dot(delta);
return (double)System.Math.Sqrt((double)len);
}
public double2(double2 f)
{
x = f.x;
y = f.y;
}
public static double2 Lerp(double2 a, double2 b, double alpha)
{
return (a * (1.0f - alpha)) + (b * alpha);
}
public double2 Rotate(double rot)
{
double2 result = new double2();
result.x = (double)(System.Math.Cos(rot) * x - System.Math.Sin(rot) * y);
result.y = (double)(System.Math.Sin(rot) * x + System.Math.Cos(rot) * y);
return result;
}
public double2 Saturate(double2 v)
{
return v.Min(new double2(1, 1)).Max(new double2(0, 0));
}
public double2 Reflect(double2 normal)
{
return this - normal * this.Dot(normal) * 2.0f;
//v = i - 2 * dot(i, n) * n.
}
public double2 PowSign(double v)
{
double2 ret = new double2();
ret.x = System.Math.Sign(x) * (double)System.Math.Pow(System.Math.Abs(x), v);
ret.y = System.Math.Sign(y) * (double)System.Math.Pow(System.Math.Abs(y), v);
return ret;
}
public double2 Min(double2 v)
{
double2 ret = new double2();
ret.x = x < v.x ? x : v.x;
ret.y = y < v.y ? y : v.y;
return ret;
}
public double2 Max(double2 v)
{
double2 ret = new double2();
ret.x = x > v.x ? x : v.x;
ret.y = y > v.y ? y : v.y;
return ret;
}
// math functions
public double Dot(double2 v)
{
return (x * v.x) + (y * v.y);
}