Random Number within a certain Range that's divisible by a certain number

jmkulakowski

Hello! I'm attempting to spawn enemies in patterns, moving from left to right and vice versa across the screen. I've been able to generate and destroy the actors when they leave the screen, but I want to limit the vertical position of each of these actors.

Essentially, I've been able to limit the vertical(y) position of the spawned actor to a value between 80 and 240. However, I only want 4 positions - 80, 120, 160, and 240. I believe I have to use modulus to spawn only a number that is divisible by 40, but I'm having trouble figuring out the expression. I would really appreciate your help. Thanks!

RThurman

Hmm... too bad you couldn't have 5 positions (80,120,160,200,240). Then it would only be something like:

random(2,6)*40

If you really cant use the 200 that gets randomly generated, I suppose you could do a test to see if its position is 200 and then destroy the actor.

gyroscope

Hi @jmkulakowski and welcome to the Forums.

The solution below assumes you want your spawns at a regular amount of seconds after each other.

I'll assume the spawning starts straightaway, the following Rules in an actor outside the playing area:

Integer attribute WhichSpawn initial value set to 0

Timer: After 2 seconds --- or whatever interval you want

Change Attribute WhichSpawn to random(1,4)

Now in your Prototype that you want spawned:

Change Attribute self.Position.X to 25 -- or whatever you've decided

Rule: When WhichSpawn < 4
Change Attribute self.Position.Y to 40+(WhichSpawn*40)
Otherwise
Change Attribute self.Position.Y to 240

colander

Here you go try this. Run the project and click the actor repeatedly and the number will change randomly in the range you specified.