Asteroid Spawning: Randomized Algorithm Choice

[antfarmar]

Currently algorithm:

• spawned randomly along edges
• guarantees not to overlap ship, whose position is always centered (0,0,0).

  Better Implementation:

• purely random position
• just check for ship overlap
• allows ship to remain at its current position between levels.

[antfarmar]

Implemented as a fully random world spawn position, checking potential spawn points against a sphere collider child on the ship, using the static Physics.CheckSphere function. Allows the ship to be active and moving between levels.

The code:

public void SpawnRandomPosition()
    {
        int mask = LayerMask.GetMask("ShipSpawnSphere");
        Vector3 spawnPosition;
        bool hit = false;

        do
        {
            Vector3 randomPosition = new Vector3(Random.value, Random.value, 0f);
            spawnPosition = Camera.main.ViewportToWorldPoint(randomPosition);
            hit = Physics.CheckSphere(spawnPosition, 5f, mask);
        } while(hit);

        spawnPosition.z = 0f;
        transform.position = spawnPosition;
    }