Science Forums 2

[CraigD]

Originally Posted by chendoh

What would I need to play this on my Pc?

A MUMPS language interpreter. A free, non-expiring, single user copy of the one I use can be had at Free Caché Downloads. The vendor, Intersystems, requires you register an email address with them to get it, but in my experience won’t spam you unless you request it, or give the address to any other company.

Pay no attention to the name “Cache”. Intersystems makes a great effort to hide the fact that Cache is, in fact, a (much extended) implementation of the MUMPS language, but it’s one of the best.

Once installed, you need only click on the icon it installs in your system tray, or follow the start menu path to its “Terminal” application, and paste the following into it

 f  r R q:'$l(R)  s I=$p($p(R,";",$l(R,";")),":") i $l(I) s @I=R

(making sure to end with exactly 1 Enter keystroke) followed by the code in post #1, followed by a blank line (the Enter key), followed by

x XELCOL4
1 .25 5,5
1 .25 4,6
1 .25 6,6
1 .25 3,7
1 .25 5,7
1 .25 7,7
1 .25 2,8
1 .25 4,8
1 .25 6,8
1 .25 8,8
 8,0 1,1  2
 0,8 1,1  2
 0,8 9,1  2
 8,0 1,9  2
3 .5 5.5,2 .2,1

, where the last line gives the mass, radius position and velocity of the ball. Pressing enter at the following prompts will step you through the simulation, and, if you want, give you more detailed data than I’ve been posting here.

In addition to letting you run the MUMPS code I post so much of at hypography, the free application has the full IDE and documentation for the language, and a lot of extensions beyond the language standard. You may find, as I do, that MUMPS and Cache are nifty language for prototyping, simulating, and other math and science-y fun.

It goes without saying, let me know if I can be of any help.