public static Vector3 SphericalToCartesian(this Vector3Spherical vec)
{
var outCart = new Vector3();
outCart.X = (float)(vec.Radius * Math.Sin(vec.Theta) * Math.Cos(vec.Phi));
outCart.Y = -(float)(vec.Radius * Math.Sin(vec.Theta) * Math.Sin(vec.Phi));
outCart.Z = (float)(vec.Radius * Math.Cos(vec.Theta));
return outCart;
}
public static Vector3Spherical CartesianToSpherical(this Vector3 cartCoords)
{
var vec = new Vector3Spherical();
var module = CalculateModule(cartCoords);
vec.Radius = module;
vec.Theta = (float)Math.Acos(cartCoords.Z / module);
vec.Phi = (float)(Math.Atan(-cartCoords.Y / cartCoords.X));
return vec;
}
public static float GetYRotation(this Vector3 direction)
{
Vector3Spherical vec = direction.CartesianToSpherical();
return MathHelper.ToDegrees(90.0f - vec.Phi);
}