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test.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<script>
var speed = 25;
var WIDTH = 25;
var HEIGHT = 25;
var puzzle;
var rules = [];
var map = [
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,0,0,1,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,1,0,1,
1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,0,0,0,1,
1,1,0,1,0,1,1,1,0,1,0,1,0,1,0,1,1,1,1,1,1,1,1,0,1,
1,0,0,1,0,0,0,0,0,1,0,1,0,1,0,0,0,1,0,0,0,0,1,0,1,
1,0,1,1,1,0,1,1,1,1,0,1,0,1,0,1,0,1,0,1,1,0,0,0,1,
1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,1,0,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,0,0,1,0,0,0,1,
1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,1,1,0,1,0,1,1,1,
1,1,0,1,0,1,0,0,0,1,0,1,0,1,1,1,0,0,1,0,1,0,0,0,1,
1,1,0,1,0,1,1,1,1,1,0,1,0,1,0,1,0,1,1,0,1,0,1,0,1,
1,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,1,0,1,1,1,0,1,
1,1,0,1,1,1,1,1,0,1,1,0,1,1,1,1,1,0,1,0,0,0,0,0,1,
1,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,1,0,1,1,1,0,1,0,1,
1,0,1,1,1,1,1,1,0,1,0,0,1,1,1,0,1,0,0,0,1,0,1,0,1,
1,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,1,1,0,1,0,1,0,1,
1,1,1,1,1,1,1,1,1,1,0,1,0,0,1,0,0,0,1,0,1,0,1,0,1,
1,0,0,0,0,1,0,0,0,1,1,1,0,1,1,1,1,0,1,0,1,0,1,0,1,
1,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,1,0,1,0,1,1,1,0,1,
1,0,0,1,0,1,0,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,1,0,1,
1,0,1,1,0,1,0,1,0,1,0,0,0,1,0,0,1,0,0,0,1,0,0,0,1,
1,0,1,0,0,1,0,1,0,0,0,1,1,1,0,1,1,1,1,1,1,1,0,1,1,
1,0,1,1,1,1,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,1,1,
1,0,0,0,0,0,0,1,0,1,1,1,0,1,0,0,0,1,1,1,0,0,0,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
];
var picobot = [4, 21];
var picobot_animation = 'red';
var picobot_animation_frame = 0;
var picobot_cell;
var world;
var OFFSET = 1;
var surroundings;
var Direction = {
UP : "up",
DOWN : "down",
LEFT : "left",
RIGHT : "right"
}
var State = {
IDLE : "idle",
MOVING : "moving"
}
var picobot_state = 0;
var picobot_rule_invoked = "";
var state = State.IDLE;
var movingDirection = Direction.UP;
var updateTimer = "";
var Color = {
RED : "red",
GREEN: "green"
}
function isWall(x, y) {
x|=0;
y|=0;
if (x < 0 || x >= WIDTH) {
return true;
}
if (y < 0 || y >= HEIGHT) {
return true;
}
return !puzzle[y * WIDTH + x].src.match("empty");
}
function chooseWall(index) {
// Look all around and choose which style of wall is best
// 0 - Empty
// 1, 2, 3, 4 - Single wall, 1 = left wall, clockwise rotation
// 5, 6, 7, 8 - Double (Corner) wall, 5 = TopLeft wall, clockwise rotation
// 9, 10, 11, 12 - Triple wall, 9 = No wall to Right, clockwise rotation
// 13, 14 - Double (Straight) wall, 13 = walls to left and right, 14 = top and bottom
// 15 - All Four Walls
// 16, 17, 18, 19 - Small Corners, 16 = corner to TopLeft, clockwise rotation
var x = index % WIDTH;
var y = index / WIDTH;
var wallTop = isWall(x, y-1);
var wallBottom = isWall(x, y+1);
var wallLeft = isWall(x-1,y);
var wallRight = isWall(x+1,y);
var wallTopLeft = isWall(x-1,y-1);
var wallTopRight = isWall(x+1,y-1);
var wallBottomLeft = isWall(x-1,y+1);
var wallBottomRight = isWall(x+1,y+1);
var wall_index = 0;
if (!wallLeft) {
wall_index += 1;
}
else if (wallBottom && !wallBottomLeft) {
wall_index += 2;
}
if (!wallBottom) {
wall_index += 10;
}
else if (wallRight && ! wallBottomRight) {
wall_index += 20;
}
if (!wallRight) {
wall_index += 100;
}
else if (wallTop && !wallTopRight) {
wall_index += 200;
}
if (!wallTop) {
wall_index += 1000;
}
else if (wallLeft && !wallTopLeft) {
wall_index += 2000;
}
wall_index = "" + wall_index;
while (wall_index.length < 4) {
wall_index = "0" + wall_index;
}
return wall_index;
}
function setWall(index, wall_index) {
puzzle[index].src = "img/wall_" + wall_index + ".png";
}
function toggleWall(index) {
if (puzzle[index].src.match("empty")) {
setWall(index, chooseWall(index));
}
else {
puzzle[index].src = "img/empty_uncleared.png";
}
// Choose walls around the current space
var x = index % WIDTH;
var y = index / WIDTH;
x |= 0;
y |= 0;
var xp;
var yp;
for(xp = x-1; xp <= x+1; xp++) {
for(yp = y-1; yp <= y+1; yp++) {
var idx = yp * WIDTH + xp;
if (xp >= 0 && xp < WIDTH && yp >= 0 && yp < HEIGHT && isWall(xp, yp)) {
setWall(idx, chooseWall(idx));
}
}
}
}
function evaluatePicobotPosition() {
var i = picobot[1] * WIDTH + picobot[0];
var cell = document.getElementById('cell_' + i);
cell.src = "img/empty_cleared.png";
var str = "";
if (isWall(picobot[0], picobot[1]-1)) {
str = str + "N";
}
else {
str = str + "n";
}
if (isWall(picobot[0]+1, picobot[1])) {
str = str + "E";
}
else {
str = str + "e";
}
if (isWall(picobot[0]-1, picobot[1])) {
str = str + "W";
}
else {
str = str + "w";
}
if (isWall(picobot[0], picobot[1]+1)) {
str = str + "S";
}
else {
str = str + "s";
}
if (picobot_rule_invoked != "") {
// Update picobot
picobot_state = picobot_rule_invoked.next_state;
}
surroundings.innerHTML = "state: " + picobot_state + " surroundings: " + str;
}
function chooseRule() {
for(var i = 0; i < rules.length; i++) {
var ruleApplies = false;
var rule = rules[i];
if (rule.state == picobot_state) {
ruleApplies = true;
for(var k = 0; k < rule.match.length; k++) {
if (rule.match[k] == 'N' && !isWall(picobot[0], picobot[1]-1)) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'n' && isWall(picobot[0], picobot[1]-1)) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'S' && !isWall(picobot[0], picobot[1]+1)) {
ruleApplies = false;
break;
}
if (rule.match[k] == 's' && isWall(picobot[0], picobot[1]+1)) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'E' && !isWall(picobot[0]+1, picobot[1])) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'e' && isWall(picobot[0]+1, picobot[1])) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'W' && !isWall(picobot[0]-1, picobot[1])) {
ruleApplies = false;
break;
}
if (rule.match[k] == 'w' && isWall(picobot[0]-1, picobot[1])) {
ruleApplies = false;
break;
}
}
}
if (ruleApplies) {
return rule;
}
}
return "";
}
function changePicobotColor(color) {
picobot_animation = color;
picobot_cell.style.backgroundImage = "url('img/" + color + ".gif')"
}
function createWorld() {
puzzle = new Array(WIDTH * HEIGHT);
world = document.getElementById('world');
var world_box_HTML = "";
for(i = 0; i < WIDTH*HEIGHT; i++) {
world_box_HTML = world_box_HTML + '<img id="cell_' + i + '" src="img/empty_uncleared.png" class="cell" onclick="toggleWall(' + i + ')" />'
}
world.innerHTML = world_box_HTML + '<div id="picobot" class="picobot_cell"></div>';
picobot_cell = document.getElementById('picobot');
updatePicobotImage();
for(i = 0; i < WIDTH*HEIGHT; i++) {
puzzle[i] = document.getElementById('cell_' + i);
}
for(i = 0; i < WIDTH*HEIGHT; i++) {
if (map[i] == 1) {
toggleWall(i);
}
}
}
function updatePicobotImage() {
picobot_cell.style.top = (picobot[1] * 20 + OFFSET) + "px";
picobot_cell.style.left = (picobot[0] * 20 + OFFSET) + "px";
}
function nudgePicobot(direction) {
var startAgain = false;
if (updateTimer != "") {
startAgain = true;
stopPicobot();
}
movePicobot(direction);
updatePicobotImage();
state = State.IDLE;
evaluatePicobotPosition();
if (startAgain) {
startPicobot();
}
}
function movePicobot(direction) {
moved = false;
if(direction == Direction.UP) {
if (picobot[1] > 0 && !isWall(picobot[0], picobot[1]-1)) {
picobot[1]--;
moved = true;
}
}
else if (direction == Direction.DOWN) {
if (picobot[1] < HEIGHT-1 && !isWall(picobot[0], picobot[1]+1)) {
picobot[1]++;
moved = true;
}
}
else if (direction == Direction.LEFT) {
if (picobot[0] > 0 && !isWall(picobot[0]-1, picobot[1])) {
picobot[0]--;
moved = true;
}
}
else { /* Direction.RIGHT */
if (picobot[0] < WIDTH-1 && !isWall(picobot[0]+1, picobot[1])) {
picobot[0]++;
moved = true;
}
}
if (moved) {
state = State.MOVING;
movingDirection = direction;
}
else {
state = State.IDLE;
}
}
function initialize() {
createWorld();
createCodeBox('codebox');
surroundings = document.getElementById('surroundings');
startPicobot();
}
function createCodeBox(id) {
var textarea = document.getElementById(id);
var numbers = document.createElement('div');
textarea.parentNode.insertBefore(numbers, textarea);
numbers.appendChild(textarea);
numbers.className = "code_box_numbers";
numbers.style.width = (textarea.offsetWidth + 30) + "px";
textarea.style.position = 'absolute';
textarea.style.left = '30px';
numbers.style.height = (textarea.offsetHeight + 2) + "px";
numbers.style.overflow = 'hidden';
numbers.style.position = 'relative';
numbers.style.width = (textarea.offsetWidth + 30) + "px";
var lines = document.createElement('div');
lines.style.position = 'absolute';
lines.style.top = 1 + "px";
lines.style.left = 0 + "px";
lines.style.width = 23 + "px";
numbers.insertBefore(lines, textarea);
lines.style.textAlign = "right";
lines.className = "code_box_lines";
var string = '';
for(var no=1;no<200;no++){
if(string.length>0) {
string = string + '<br>';
}
string = string + no;
}
lines.innerHTML = string;
textarea.onscroll = function() {
updateLines(lines, textarea);
}
}
var firstLine = 1;
function updateLines(lines, textarea) {
var lineHeight = 16;
var visibleLine = textarea.scrollTop / parseInt(textarea.style.lineHeight);
visibleLine = textarea.scrollTop / lineHeight + 1;
visibleLine |= 0;
var numLines = parseInt(textarea.style.height) / lineHeight;
numLines = 500 / lineHeight;
numLines |= 0;
if (visibleLine != firstLine) {
firstLine = visibleLine|0;
var i;
var str = '';
for(i = firstLine; i < firstLine + numLines + 1; i++) {
str = str + i + "<br />";
}
lines.innerHTML = str;
}
var diff = textarea.scrollTop % lineHeight;
lines.style.top = (-diff + 1) + "px"
}
function startPicobot() {
if (updateTimer == "") {
evaluatePicobotPosition();
updateTimer = window.setInterval("update()", speed);
}
}
function stopPicobot() {
if (updateTimer != "") {
window.clearInterval(updateTimer);
updateTimer = "";
updatePicobotImage();
state = State.IDLE;
evaluatePicobotPosition();
}
}
function interpretRules() {
var new_rules = [];
var textarea = document.getElementById('codebox');
// parse textarea
var str = textarea.value;
var lines = str.split("\n");
var ParserState = {
STATE_TOKEN: 0,
SURROUNDINGS: 1,
ARROW: 2,
NEXT_DIR: 3,
NEXT_STATE: 4
};
var i;
var state = ParserState.STATE_TOKEN;
var rule = {
state: 0,
match: "",
next_direction: "",
next_state: 0
};
for(i = 0; i < lines.length; i++) {
// Sanify line
var line = lines[i];
var new_line = line;
do {
line = new_line;
new_line = line.replace(/\s\s/, " ");
} while (new_line != line);
line = line.replace(/^\s*/, "");
line = line.replace(/\s*$/, "");
if (line == "") {
continue;
}
// Pull out parts according to current parser state
words = line.split(" ");
for (var k = 0; k < words.length; k++) {
var token = words[k];
// Handle Comments
if (token.match(/^\#/)) {
break;
}
switch(state) {
case ParserState.STATE_TOKEN:
// Might allow words here...
rule.state = parseInt(token);
break;
case ParserState.SURROUNDINGS:
// Should contain 'newsNEWS' and nothing else
rule.match = token;
break;
case ParserState.ARROW:
// Check that token == '->'
if (token == '->') {
}
else {
// Parsing error
}
break;
case ParserState.NEXT_DIR:
if (token == 'N' || token == 'n') {
rule.next_direction = Direction.UP;
}
else if (token == 'S' || token == 's') {
rule.next_direction = Direction.DOWN;
}
else if (token == 'E' || token == 'e') {
rule.next_direction = Direction.RIGHT;
}
else if (token == 'W' || token == 'w') {
rule.next_direction = Direction.LEFT;
}
else if (token == 'X' || token == 'x') {
rule.next_direction = "";
}
else {
// Parsing error
}
break;
case ParserState.NEXT_STATE:
rule.next_state = parseInt(token);
new_rules.push(rule);
rule = {
state: 0,
match: "",
next_direction: Direction.UP,
next_state: 0
};
break;
}
state++;
state %= 5;
}
}
rules = new_rules;
}
var i = 0;
function update() {
// Smooth movement code:
if (state == State.MOVING) {
var current_top = parseInt(picobot_cell.style.top);
var current_left = parseInt(picobot_cell.style.left);
var new_value = 0;
if (movingDirection == Direction.UP) {
new_value = current_top - 5;
picobot_cell.style.top = new_value + "px";
}
else if (movingDirection == Direction.DOWN) {
new_value = current_top + 5;
picobot_cell.style.top = new_value + "px";
}
else if (movingDirection == Direction.LEFT) {
new_value = current_left - 5;
picobot_cell.style.left = new_value + "px";
}
else if (movingDirection == Direction.RIGHT) {
new_value = current_left + 5;
picobot_cell.style.left = new_value + "px";
}
if (new_value % 20 == OFFSET) {
state = State.IDLE;
// We choose a new rule
do {
// We evaluate the current position
evaluatePicobotPosition();
picobot_rule_invoked = chooseRule();
if (picobot_rule_invoked == "") {
// No rules!
}
else if (picobot_rule_invoked.next_direction != "") {
// We carry out the rule
movePicobot(picobot_rule_invoked.next_direction);
}
} while(picobot_rule_invoked.next_direction == "");
}
}
else {
var y = picobot[1];
if (i % 2) {
movePicobot(Direction.UP);
}
else {
movePicobot(Direction.DOWN);
}
if (y == picobot[1]) {
i++;
}
}
}
</script>
<style>
.world_container {
width: 504px;
height: 504px;
}
.world_container > div {
}
.code_box {
width: 500px;
height: 500px;
background-color: white;
font-family: monospace;
font-size: 14px;
line-height: 16px;
border: 0;
}
.code_box_numbers {
border:1px solid gray;
font-family: monospace;
background-color: #ddd;
font-size: 14px;
line-height: 16px;
}
.code_box_lines{
font-family: monospace;
border-right: 1px solid gray;
padding-right: 3px;
font-size: 14px;
line-height: 16px;
}
.picobot_cell {
position: absolute;
left: 70px;
top: 50px;
width: 20px;
height: 20px;
background-image: url('img/red.gif');
z-index: 0;
}
.world_box {
width: 500px;
height: 500px;
border: 2px solid gray;
line-height: 0;
background-image: url('img/world_bg.png');
margin: 0;
padding: 0;
}
.cell {
width:20px;
height:20px;
z-index: -1;
}
img {
margin: 0;
padding: 0;
}
td {
margin: 0;
padding: 0;
}
tr {
margin: 0;
padding: 0;
}
table {
margin: 0;
padding: 0;
}
body {
margin: 0;
padding: 0;
}
</style>
</head>
<body onload="initialize()">
<table cellspacing = 0 cellpadding = 0>
<tr>
<td>
<div class="world_box" id="world"></div>
<div id="surroundings">
</div>
<div>
<button onclick="nudgePicobot(Direction.UP)">Up</button> | <button onclick="nudgePicobot(Direction.DOWN)">Down</button> |
<button onclick="nudgePicobot(Direction.LEFT)">Left</button> | <button onclick="nudgePicobot(Direction.RIGHT)">Right</button> |
<button onclick="startPicobot()">Start</button> | <button onclick="stopPicobot()">Stop</button>
<br/>
<button onclick="changePicobotColor(Color.RED)">Red</button> | <button onclick="changePicobotColor(Color.GREEN)">Green</button>
</div>
</td>
<td valign="top">
<textarea class="code_box" id="codebox">
# Current_State surroundings -> Go_Direction Go_into_state
# Capital letters for walls, lowercase letters for openings
# NeWs -> Wall to north and west, opening to east and south
# Example:
# When we are in state 0, and east is clear, don't move anywhere and go to state 1
# 0 e -> X 1
0 e -> E 1
0 nE -> N 0
0 NEw -> W 3
0 NEW -> S 2
1 s -> S 2
1 eS -> E 1
1 nES -> N 0
1 NES -> W 3
2 w -> W 3
2 sW -> S 2
2 SWe -> E 1
2 SWE -> N 0
3 n -> N 0
3 wN -> W 3
3 WNs -> S 2
3 WNS -> E 1
</textarea>
<button onclick="interpretRules()">Enter Rules</button>
</td>
</tr>
</table>
</body>
</html>