Jump to content
Sign in to follow this  

simple vex code for Conway's game of life

Recommended Posts

Hi there,

I'm quite new to vex and try to build a simple loop to implement the set of rules of the "game of life" by Conway.

The code seems to work for the first iteration, but then stops working as I would expect.

In my example I use a grid with 5 points to be having a attrib value of 1, which is called


  the others are set to 0.

This goes into a point wrangle:

int count = chi("count");

int life = i@life;

int adj[] = array();
int alive = 0;

adj = nearpoints(0, @P, 10, 9);
removeindex(adj, 0);
i[]@adj = adj;

for(int i = 0; i < count; i++){

    alive = 0;
    for(int p = 0; p < len(adj); p++){
        int iter = adj[p];
        alive += point(0, "life", iter);
    if(life == 1){
        if(alive < 2 || alive == 8) life = 0;
    else if(alive == 3) life = 1;
    i@life = life;

I would very much apprecciate any help on that!



Share this post

Link to post
Share on other sites

 You need to use a solver sop. Houdini don't keep "global" variables overtime. It's why you need a solver.
I've put your wrangle in a solver and it's do something but more like an infection. Don't know if it's the behavior you expect.
I've also give it a try some time ago, the file is attached. Not perfect and stop working at frame 55. No idea why.

A very good explanation of the solver sop here.
If you're new to houdini this site is a must see.

It as also a simple game of life example.


vex_gameOfLife + solver.hiplc


Edited by flcc

Share this post

Link to post
Share on other sites

Thank you Fred!

within a sop solver it works fine!
I don't get though, why it wouldn't work without it just with the loop.

And thank you for the links, they are very useful!

Edited by regart

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this