Question

I have defined the following record:

type Ball =
    {
       center : Vector3<m> 
       radius : float32<m>
       color : Microsoft.Xna.Framework.Color 
    }

I’m trying to create a list of Ball this way:

let BallRadius = 0.2<m>
let list =
    [ for i in 0 .. 9 ->
        {
            center = { X = BallRadius + (float i) * BallRadius * 2.0 ; Y = 0.0<m>; Z = 0.0<m>}; //1 error
            radius = BallRadius; //1 error
            color = Microsoft.Xna.Framework.Color.White
        }

    ]

Seems that in the first case i is an int and I can’t multiply if for float. In the second case I can’t assign a float to a float32.
How can I solve this?

Answer 1

1. You can’t multiple floats by ints, so you’ll need center = BallRadius + (float i) * BallRadius * 2.0
2. radius = (float32 BallRadius) * 1.0f<m> works, though I’m not sure it’s the most idiomatic.

That aside, it’s not clear to me how adding two BallRadius gets you a Vector3<m>, unless your vector is just a float…