1 files changed, 79 insertions, 0 deletions
diff --git a/js/stochasticca.js b/js/stochasticca.js
new file mode 100644
index 0000000..5226c35
--- /dev/null
+++ b/js/stochasticca.js
@@ -0,0 +1,79 @@
+var params;
+
+function mod(a, b)
+{
+    var c = a % b;
+    while (a < 0)
+    {
+        c += b;
+    }
+    return c;
+}
+
+function sigmoid(z)
+{
+    return 1 / (1 + Math.exp(-z))
+}
+
+function drawCA()
+{
+    try
+    {
+        params = $.parseJSON("[" + $("#params").val() + "]");
+        var width = parseInt($("#width").val());
+        var time  = parseInt($("#time").val());
+    }
+    catch(e)
+    {
+        $("#error").text("Error - Invalid parameters: " + $("#params").val() + ".");
+        return;
+    }
+    createCanvas(width, time);
+    var C = Math.floor(params.length / 2);
+    var values = [[]];
+    for (var i = 0; i < width; i++)
+    {
+        values[0][i] = 1;
+    }
+    for (var t = 1; t < time; t++)
+    {
+        values.push([]);
+        for (var i = 0; i < width; i++)
+        {
+            var total = 0;
+            for (var c = -C; c <= C; c++)
+            {
+                total += params[c+C] * values[t-1][i+c];
+            }
+            values[t].push(Math.random() < sigmoid(total) ? 1 : 0)
+        }
+    }
+
+    for (var t = 0; t < time; t++)
+    {
+        for (var i = 0; i < width; i++)
+        {
+            stroke(values[t][i] === 1 ? 0 : 255);
+            point(i, t);
+        }
+    }
+}
+
+function setup()
+{
+}
+
+$(function()
+{
+    $("#params").keydown(function (e)
+    {
+        if (e.which == 13)
+        {
+            drawCA();
+        }
+    });
+    $("#display").click(function()
+    {
+        drawCA();
+    });
+});