Hi, I'm trying to create a 'curtain shooter' game. Essentially this is a side scrolling shooter (think Gradius, R-Type etc) but the enemies throw out a rediculous number of bullets. Here is an example: http://www.sss-mag.com/images/strayfire2.jpg could anyone advise me as to how I could do the mathmatical side of this? I've looked at what I am trying to do and have summarised that I need to: i) Create a circle (n.b - this isnt a problem) ii) Plot points at regular points around the circle (this is where the problem lies) iii) The circle will also have to grow by a set amount each frame, and the space between the intervals will have to grow also. I was also hoping to do something with sine and cosine waves. However im not sure how to approach this (I get the feeling its a lot easier than I think it is...its 2d geometary). Is there a specific topic i should look up? Can anyone recommend specific reading?