Here is the Eighth example of the next release of PortablE:
Example 8: StarsXY.e
This is the first of several pretty "stars" examples.  They are not so much examples of the graphics module as they are examples of  general PortablE code, and what can be achieved with a little bit of clever maths.

This example shows stars moving across the screen (in the X/Y plane), with depth parallax, in 87 lines of E code.  Although it is fairly well optimised, I have avoided a few obvious optimisations to keep the code clearer.

[ Edited by ChrisH on 2011/3/2 23:43 ]