//Rotates the spawn direction vector, then returns the spawn location for the next asteroid
private Vector3 GetNextSpawnPos()
{
//Get the furthest possible spawn location in the current direction, then calcuate its distance from the center
Vector3 MaxDistanceSpawnPos = SpawnDirection * SpawnDistanceRange.y;
MaxDistanceSpawnPos = ScreenBounds.ClampPosInside(MaxDistanceSpawnPos);
float MaxSpawnDistance = Vector3.Distance(Vector3.zero, MaxDistanceSpawnPos);
//Get the new spawn pos somewhere along that line
float SpawnDistance = Random.Range(SpawnDistanceRange.x, MaxSpawnDistance);
Vector3 SpawnPos = SpawnDirection * SpawnDistance;
//Rotate the spawn direction ready for next time, then return the final spawn position
SpawnDirection = Quaternion.AngleAxis(-RotationPerSpawn, Vector3.forward) * SpawnDirection;
return(SpawnPos);
}
//Returns a position offset from the players current location, within the range of the given vector values
private Vector3 GetOffsetPlayerPos(Vector2 OffsetRange)
{
//Get 2 random values within the given offset range to offset from the player pos in each direction
float XOffset = Random.Range(OffsetRange.x, OffsetRange.y);
float YOffset = Random.Range(OffsetRange.x, OffsetRange.y);
//Flip a coin to decide which direction these offsets will be applied
bool PositiveXOffset = Random.value >= 0.5f;
bool PositiveYOffset = Random.value >= 0.5f;
//Apply these offsets to the players current location to get the new offset position
Vector3 OffsetPos = GameState.Instance.PlayerShip.transform.position;
OffsetPos.x += PositiveXOffset ? XOffset : -XOffset;
OffsetPos.y += PositiveYOffset ? YOffset : -YOffset;
OffsetPos = ScreenBounds.ClampPosInside(OffsetPos);
return(OffsetPos);
}
private float RotationPerSpawn; //Spawn direction vector rotation after each spawn
private void Start()
{
//Spawn all the stars into place
RotationPerSpawn = 360f / StarAmount;
for (int i = 0; i < StarAmount; i++)
{
//Get the furthest distance possible spawn location in the current spawn direction, then calculate its distance
Vector3 MaxDistanceSpawnPos = SpawnDirection * MaxSpawnDistance;
MaxDistanceSpawnPos = ScreenBounds.ClampPosInside(MaxDistanceSpawnPos);
float MaxValidSpawnDistance = Vector3.Distance(Vector3.zero, MaxDistanceSpawnPos);
//Spawn a new star in a random distance between 0 and this max distance
float RandomSpawnDistance = Random.Range(0f, MaxValidSpawnDistance);
Vector3 SpawnPos = SpawnDirection * RandomSpawnDistance;
Instantiate(StarPrefab, SpawnPos, Quaternion.identity);
//Rotate the spawn direction vector, ready for the next star to be spawned
SpawnDirection = Quaternion.AngleAxis(-RotationPerSpawn, Vector3.forward) * SpawnDirection;
}
}