Generate a random point with an anullus.

Questions & Answers
1

Ive been searching this up but it is in some obscure crappy language called mathematica. Basically i am trying to generate a random point around the player to spawn the unistorm thunder effect at, as i am wanting a more realistic sound and shadow from them.

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Essentially i want to specify a min distance and a max distance for the bolt to spawn in around the player. It would then pick a random point within the yellow area to spawn the bolt. What would be the most efficient way of generating these results?

2

Something like this should work(pseudo code), you will still have to decide on a height.

//Pick a random direction.
var Direction_Vector : Vector3 = Vector3.zero;

while (Direction_Vector == Vector3.zero) {
    Direction_Vector = Vector3(Random.Range(-1.0, 1.0), 0, Random.Range(-1.0, 1.0));
}

//Normalise it.
Direction_Vector = Direction_Vector.normalized;

//Assuming the small circle radius is 5 and the large radius is 10.
Magnitude = Random.Range(5, 10);

//Create you spawn Vector
Spawn_Vector = Direction_Vector * Magnitude;

//Height Vector, ten high (change to what you want).
Height_Vector = Vector3(0, 10, 0);

//Use Spawn Vector in relation to character position to get spawn position.
//and adjust with the Height_Vector.
Spawn_Position = Character.transform.position + Spawn_Vector + Height_Vector;
3

THe interpreter moans about multiplying vector twos. Ive tryed storing them in temp variables as X,Y but it produces some dodgy results,