added missing file :-/

diff --git a/2d.js b/2d.js
new file mode 100644 (file)
index 0000000..b919ec8
--- /dev/null
+++ b/2d.js
@@ -0,0 +1,153 @@
+$(document).ready(function(){
+    
+    var canvas = document.getElementById('canvas')
+    var c = canvas.getContext('2d');
+
+    var rows = 50;
+    var columns = 50;
+
+    var cellWidth = canvas.width / rows;
+    var cellHeight = canvas.height / columns;
+
+    function cell(x, y, h, l) {
+        this.x = x;
+        this.y = y;
+        this.h = h;
+        this.l = l;
+        this.state = 0;
+        this.kill = function() {
+            c.fillStyle = "rgb(255,255,255)";
+            c.fillRect(this.x, this.y, this.h, this.l);
+            this.state = 0;
+        }
+        this.revive = function() {
+            c.fillStyle = "rgb(0,0,0)";
+            c.fillRect(this.x, this.y, this.h, this.l);
+            this.state = 1;
+        }
+        this.redraw = function() {
+            c.fillStyle = this.state == 1 ? "rgb(0,0,0)" : "rgb(255,255,255)";
+            c.fillRect(this.x, this.y, this.h, this.l);
+        }
+        this.highlight = function() {
+            c.fillStyle = "rgb(0,0,100)";
+            c.fillRect(this.x, this.y, this.h, this.l);
+        }
+    }
+
+    function universe() {
+        this.population = [];
+        this.generation = 0;
+
+        for (var i = 0; i < rows; i++) {
+            var world = [];
+            var x = 0;
+            var y = i * cellHeight;
+            for (var ii = 0; ii < columns; ii++) {
+                world.push(new cell(x, y, cellWidth, cellHeight));
+                x += cellWidth;
+                Math.random() > .5 ? world[ii].revive() : world[ii].kill();
+            }
+            this.population.push(world);
+        }
+
+        this.print = function() {
+            for (var i = 0; i < rows; i++) {
+                var s = '';
+                for (var ii = 0; ii < columns; ii++) {
+                    s += this.population[i][ii];
+                }
+            }
+        }
+
+        this.highlight = function() {
+            for (var i = 0; i < rows; i++) {
+                for (var ii = 0; ii < columns; ii++) {
+                    if (this.population[i][ii].state == 1) {
+                        this.population[i][ii].highlight();
+                    }
+                }
+            }
+        }
+
+        this.redraw = function() {
+            for (var i = 0; i < rows; i++) {
+                for (var ii = 0; ii < columns; ii++) {
+                    if (this.population[i][ii].state == 1) {
+                        this.population[i][ii].redraw();
+                    }
+                }
+            }
+        }
+    }
+
+    function tick(automaton) {
+        automaton.generation += 1;
+        var universe = automaton.population;
+        var newUniverse = [];
+        for (var i = 0; i < universe.length; i++) {
+            newUniverse[i] = [];
+            for (var ii = 0; ii < universe[i].length; ii++) {
+                var neighbors = (universe[i][ii+1] ? universe[i][ii+1].state : 0) +
+                                (universe[i][ii-1] ? universe[i][ii-1].state : 0) +
+                                (universe[i+1] ? 
+                                    (universe[i+1][ii] ? universe[i+1][ii].state : 0) +
+                                    (universe[i+1][ii+1] ? universe[i+1][ii+1].state : 0) +
+                                    (universe[i+1][ii-1] ? universe[i+1][ii-1].state : 0)
+                                    : 0) +
+                                (universe[i-1] ? 
+                                    (universe[i-1][ii] ? universe[i-1][ii].state : 0) +
+                                    (universe[i-1][ii-1] ? universe[i-1][ii-1].state : 0) +
+                                    (universe[i-1][ii+1] ? universe[i-1][ii+1].state : 0)
+                                    : 0);
+                universe[i][ii].neighbors = neighbors;
+                if (universe[i][ii].state == 1) {
+                    if (neighbors < 2 || neighbors > 3) {
+                        newUniverse[i][ii] = 0;
+                    } else { 
+                        newUniverse[i][ii] = 1;
+                    }
+                } else {
+                    newUniverse[i][ii] = (neighbors == 3 ? 1 : 0);
+                }
+            }
+        }
+        for (var i in newUniverse) {
+            for (var ii in newUniverse[i]) {
+                newUniverse[i][ii] ? universe[i][ii].revive() : universe[i][ii].kill();
+            }
+        }
+        $('#generation')[0].innerHTML = automaton.generation;
+    }
+
+    var automaton = new universe;
+    var seed = $.extend(true, {}, automaton);
+    var tickID = 0;
+
+    $('#controls #start-automaton').click(function(e){
+        tickID = setInterval(function(){tick(automaton)}, 100);
+        $('#controls #start-automaton').hide();
+        $('#controls #stop-automaton').show();
+        $('#controls #highlight-seed').show();
+    });
+
+    $('#controls #stop-automaton').click(function(e){
+        clearInterval(tickID);
+        $('#controls #stop-automaton').hide();
+        $('#controls #start-automaton').show();
+    });
+
+    $('#controls #reset-automaton').click(function(e){
+        clearInterval(tickID);
+        $('#controls #stop-automaton').hide();
+        $('#controls #start-automaton').show();
+        automaton = $.extend(true, {}, seed);
+        $('#generation')[0].innerHTML = automaton.generation;
+        automaton.redraw();
+    });
+
+    $('#controls #highlight-seed').click(function(e){
+        seed.highlight();
+    });
+
+});