Emitting objects at a progressive rate randomly in a 2D game

Question

I am planning on developing a small 2D Android and iPhone game and I need to go over a few things before I can start building.

I was wondering how to build a script in Javascript to emit a prefab within a ring-like parameter in a 2D style game. I will try to explain with images.

alt text

In this image, The green square represents the Camera's view, and the red ring of sorts represents the parameters of which I want the enemies (those blob things) to spawn.

I need help developing a script that randomly generates a position within the parameter and places an object of choice there (to be changed in the inspector tab). I also need to have the spawn rate changeable through time, as in it spawns faster over a period of time.

If anyone can help me, it would be so great. I'm willing to go into further detail, so just ask if you need that.

Thanks.

Answer 1

Best Answer

Answer by Benproductions1 · May 20, 2013 at 04:14 AM

How about using 2 random numbers one for magnitude, which would be between the 2 radii and one for direction (angle) which would be between 0 and 2pi. Then you can use sin/cos to get the x and y values. Then cast that to a vector and pass it into the Instantiate function you are already calling :)

Add comment · Show 1 · Share

IandYou · May 21, 2013 at 02:47 AM 0

Share

Thanks heaps, I just didn't really know where to begin to randomise each position, but I got it working.

Thanks

Emitting objects at a progressive rate randomly in a 2D game

1 Reply

Your answer

Follow this Question

Related Questions