This is a documentation for Board Game Arena: play board games online !
BGA Studio Cookbook: Difference between revisions
Victoria La (talk | contribs) (Added recipe for calling functions from onEnteringState) |
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'''Ingredients:''' ggg.js, ggg.game.php | '''Ingredients:''' ggg.js, ggg.game.php | ||
So you want nice pictures in the game log | So you want nice pictures in the game log. What do you do? The first idea that comes to mind is to send html from php in notifications (see method above). | ||
So what else can you do? I use this recipe | This is a bad idea for many reasons: | ||
* It's bad architecture. ui elements leak into the server, and now you have to manage the ui in multiple places. | |||
* If you decided to change something in the ui in future version, replay logs for old games and tutorials may not work, since they use stored notifications. | |||
* Log previews for old games become unreadable. (This is the log state before you enter the game replay, which is useful for troubleshooting and game analysis.) | |||
* It's more data to transfer and store in the db. | |||
* It's a nightmare for translators. | |||
So what else can you do? I use this recipe for '''client side log injection''' to intercept log arguments (which come from the server) and replace them with html on the client side. | |||
[[File:clientloginjection.png|left]] | [[File:clientloginjection.png|left]] | ||
| Line 318: | Line 320: | ||
<pre> | <pre> | ||
/** Override this function to inject html | /** Override this function to inject html into log items. This is a built-in BGA method. */ | ||
/* @Override */ | /* @Override */ | ||
| Line 342: | Line 344: | ||
return this.inherited(arguments); | return this.inherited(arguments); | ||
}, | }, | ||
</pre> | </pre> | ||
| Line 386: | Line 384: | ||
</pre> | </pre> | ||
Note in this case server simply injects token_id as name, and client substitutes it for the | Note that in this case the server simply injects token_id as a name, and the client substitutes it for the translated name or the picture. | ||
| Line 409: | Line 407: | ||
args[key] = this.getTokenDiv('token_id', args); | args[key] = this.getTokenDiv('token_id', args); | ||
} | } | ||
'''Important:''' In the client-side 'format_string_recursive' method, the 'args' parameter will only contain arguments passed to it from the server in the second parameter (the string that is contained in 'clienttranslate'. | |||
=== High-Definition Graphics === | === High-Definition Graphics === | ||
Revision as of 21:39, 30 December 2020
This page is collection of design and implementation recipes for BGA Studio framework. For tooling and usage recipes see Tools and tips of BGA Studio. If you have your own recipes feel free to edit this page.
Visual Effects, Layout and Animation
Create pieces dynamically (using template)
Ingredients: ggg_ggg.tpl, ggg.js
Note: this method is recommended by BGA guildlines
Declared js template with variables in .tpl file, like this
<script type="text/javascript">
// Javascript HTML templates
var jstpl_ipiece = '<div class="${type} ${type}_${color} inlineblock" aria-label="${name}" title="${name}"></div>';
</script>
Use it like this in .js file
div = this.format_block('jstpl_ipiece', {
type : 'meeple',
color : 'ff0000',
name : 'Bob',
});
Then you do whatever you need to do with that div, this one specifically design to go to log entries, because it has embedded title (otherwise its a picture only) and no id.
Note: you could have place this variable in js itself, but keeping it in .tpl allows you to have your js code be free of HTML. Normally it never happens but it is good to strive for it. Note: you can also use string concatenation, its less readable. You can also use dojo dom object creation api's but its brutally verbose and its more unreadable.
Create pieces dynamically (using string concatenation)
Ingredients: ggg.js
Note: Not recommended
div = "<div class='meeple "+color+"'></div>";
Create all pieces statically
Ingredients: ggg_ggg.tpl, ggg.css, ggg.view.php (optional)
- Create ALL game pieces in html template (.tpl)
- ALL pieces should have unique id, and it should be meaningful, i.e. meeple_red_1
- Do not use inline styling
- Id of player's specific pieces should use some sort of 'color' identification, since player id cannot be used in static layout, you can use english color name, hex 6 char value, or color "number" (1,2,3...)
- Pieces should have separated class for its color, type, etc, so it can be easily styled in groups. In example below you now can style all meeples, all red meeples or all red tokens, or all "first" meeples
ggg.tpl:
<div id="home_red" class="home_red home">
<div id="meeple_red_1" class="meeple red n1"></div>
<div id="meeple_red_2" class="meeple red n2"></div>
</div>
ggg.css:
.meeple {
width: 32px;
height: 39px;
background-image: url(img/78_64_stand_meeples.png);
background-size: 352px;
}
.meeple.red {
background-position: 30% 0%;
}
- There should be straight forward mapping between server id and js id (or 1:1)
- You place objects in different zones of the layout, and setup css to take care of layout
.home .meeple{
display: inline-block;
}
- If you need to have a temporary object that look like original you can use dojo.clone (and change id to some temp id)
- If there is lots of repetition or zone grid you can use template generator, but inject style declaration in css instead of inline style for flexibility
Note:
- If you use this model you cannot use premade js components such as Stock and Zone
- You have to use alternative methods of animation (slightly altered) since default method will leave object with inline style attributes which you don't need
Use thematic fonts
Ingredients: ggg.css
Sometime game elements use specific fonts of text, if you want to match it up you can load some specific font (IMPORTANT: from some free font source. See notes below).
.css
/* latin-ext */
@font-face {
font-family: 'Qwigley';
font-style: normal;
font-weight: 400;
src: local('Qwigley'), local('Qwigley-Regular'), url(https://fonts.gstatic.com/s/qwigley/v6/2Dy1Unur1HJoklbsg4iPJ_Y6323mHUZFJMgTvxaG2iE.woff2) format('woff2');
unicode-range: U+0100-024F, U+1E00-1EFF, U+20A0-20AB, U+20AD-20CF, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Qwigley';
font-style: normal;
font-weight: normal;
src: local('Qwigley'), local('Qwigley-Regular'), url(https://fonts.gstatic.com/s/qwigley/v6/gThgNuQB0o5ITpgpLi4Zpw.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2212, U+2215, U+E0FF, U+EFFD, U+F000;
}
@font-face {
font-family: 'Qwigley';
font-style: normal;
font-weight: normal;
src: local('Qwigley'), local('Qwigley-Regular'), url(http://ff.static.1001fonts.net/q/w/qwigley.regular.ttf) format('ttf');
}
.zone_title {
display: inline-block;
position: absolute;
font: italic 32px/32px "Qwigley", cursive;
height: 32px;
width: auto;
}
NB: if you need to include a font that's not available online, an extra action will be needed from an admin. Please include the font file(s) in your img directory, and mention it to admins when requesting your game to be moved to alpha. Please remember that the font has to be free, and include a .txt with all appropriate license information about the font. You can look for free fonts (for example) on https://fonts.google.com or https://www.fontsquirrel.com/)
Use player color in template
Ingredients: ggg_ggg.tpl, ggg.view.php
.view.php:
function build_page($viewArgs) {
// Get players & players number
$players = $this->game->loadPlayersBasicInfos();
$players_nbr = count($players);
/**
* ********* Place your code below: ***********
*/
// Set PCOLOR to the current player color hex
global $g_user;
$cplayer = $g_user->get_id();
if (array_key_exists($cplayer, $players)) { // may be not set if spectator
$player_color = $players [$cplayer] ['player_color'];
} else {
$player_color = 'ffffff'; // spectator
}
$this->tpl ['PCOLOR'] = $player_color;
Scale to fit for big boards
Ingredients: ggg_ggg.tpl, ggg.js
Lets say you have huge game board, and lets say you want it to be 1400px wide. Besides the board there will be side bar which is 240 and trim. My display is 1920 wide so it fits, but there is big chance other people won't have that width. What do you do? Easiest thing I came up with is to scale whole content to fit (everything you declare in .tpl file). Tested or firefox and chrome.
ggg_ggg.tpl:
<div id="thething" class="thething" style="width: 1400px;">
... everything else you declare ...
</div>
ggg.js:
setup : function(gamedatas) {
console.log("Starting game setup");
...
this.interface_min_width = 740;
this.interface_max_width = 1400;
dojo.connect(window, "onresize", this, dojo.hitch(this, "adaptViewportSize"));
},
adaptViewportSize : function() {
var pageid = "page-content";
var nodeid = "thething";
var bodycoords = dojo.marginBox(pageid);
var contentWidth = bodycoords.w;
var browserZoomLevel = window.devicePixelRatio;
//console.log("zoom",browserZoomLevel);
if (contentWidth >= this.interface_max_width || browserZoomLevel >1 || this.control3dmode3d) {
dojo.style(nodeid,'transform','');
return;
}
var percentageOn1 = contentWidth / this.interface_max_width;
dojo.style(nodeid, "transform", "scale(" + percentageOn1 + ")");
},
Note: this method does not seems to work to retina resolution displays, if you know better way let me know
Dynamic tooltips
If you really need a dynamic tooltip you can use this technique. (Only use it if the static tooltips provided by the BGA framework are not sufficient.)
new dijit.Tooltip({
connectId: ["divItemId"],
getContent: function(matchedNode){
return "... calculated ...";
}
});
This is an out-of-the-box djit.Tooltip. It has a getContent method which is called dynamically.
The string function return becomes the innerHTML of the tooltip, so it can be anything (matchedNode in this case) dojo node representing dom object with id of "divItemId" but there are more parameters which I am not posting here which allows more sophisticated subnode queries.
It's not part of the BGA API so use at your own risk.
Accessing images from js
Ingredients: ggg.js
// your game resources
var my_img = '<img src="'+g_gamethemeurl+'img/cards.jpg"/>';
// shared resources
var my_help_img = "<img class='imgtext' src='" + g_themeurl + "img/layout/help_click.png' alt='action' /> <span class='tooltiptext'>" +
text + "</span>";
Inject parameters in the log
Here is an example of what was done for Terra Mystica which is simple and straightforward:
//Define the proper message
$message = clienttranslate('${player_name} gets ${power_income} via Structures');
if ($price > 0) {
self::DbQuery("UPDATE player SET player_score = player_score - $price WHERE player_id = $player_id");
$message = clienttranslate('${player_name} pays ${vp_price} and gets ${power_income} via Structures');
}
// Notify
self::notifyAllPlayers( "powerViaStructures", $message, array(
'i18n' => array( ),
'player_id' => $player_id,
'player_name' => self::getUniqueValueFromDb( "SELECT player_name FROM player WHERE player_id = $player_id" ),
'power_tokens' => $power_tokens,
'vp_price' => self::getLogsVPAmount($price),
'power_income' => self::getLogsPowerAmount($power_income),
'newScore' => self::getUniqueValueFromDb( "SELECT player_score FROM player WHERE player_id = $player_id" ),
'counters' => $this->getGameCounters(null),
) );
With some functions to have the needed html added inside the substitution variable, such as:
function getLogsPowerAmount( $amount ) {
return "<div class='tmlogs_icon' title='Power'><div class='power_amount'>$amount</div></div>";
}
Note: injecting html from php is not ideal but easy, if you want more clean solution, use method below but it is a lot more sophisticated.
Rendering text with players color and proper background
Ingredients: ggg.js
This example actually writes "You" but you can replace this with player name as easily, drop translating function in this case
/* Implementation of proper colored You with background in case of white or light colors */
divYou : function() {
var color = this.gamedatas.players[this.player_id].color;
var color_bg = "";
if (this.gamedatas.players[this.player_id] && this.gamedatas.players[this.player_id].color_back) {
color_bg = "background-color:#" + this.gamedatas.players[this.player_id].color_back + ";";
}
var you = "<span style=\"font-weight:bold;color:#" + color + ";" + color_bg + "\">" + __("lang_mainsite", "You") + "</span>";
return you;
},
Inject images and styled html in the log
Ingredients: ggg.js, ggg.game.php
So you want nice pictures in the game log. What do you do? The first idea that comes to mind is to send html from php in notifications (see method above).
This is a bad idea for many reasons:
- It's bad architecture. ui elements leak into the server, and now you have to manage the ui in multiple places.
- If you decided to change something in the ui in future version, replay logs for old games and tutorials may not work, since they use stored notifications.
- Log previews for old games become unreadable. (This is the log state before you enter the game replay, which is useful for troubleshooting and game analysis.)
- It's more data to transfer and store in the db.
- It's a nightmare for translators.
So what else can you do? I use this recipe for client side log injection to intercept log arguments (which come from the server) and replace them with html on the client side.
ggg.js
/** Override this function to inject html into log items. This is a built-in BGA method. */
/* @Override */
format_string_recursive : function(log, args) {
try {
if (log && args && !args.processed) {
args.processed = true;
// list of special keys we want to replace with images
var keys = ['place_name','token_name'];
for ( var i in keys) {
var key = keys[i];
args[key] = this.getTokenDiv(key, args);
}
}
} catch (e) {
console.error(log,args,"Exception thrown", e.stack);
}
return this.inherited(arguments);
},
getTokenDiv : function(key, args) {
// ... implement whatever html you want here, example from sharedcode.js
var token_id = args[key];
var item_type = getPart(token_id,0);
var logid = "log" + (this.globalid++) + "_" + token_id;
switch (item_type) {
case 'wcube':
var tokenDiv = this.format_block('jstpl_resource_log', {
"id" : logid,
"type" : "wcube",
"color" : getPart(token_id,1),
});
return tokenDiv;
break;
case 'meeple':
if ($(token_id)) {
var clone = dojo.clone($(token_id));
dojo.attr(clone, "id", logid);
this.stripPosition(clone);
dojo.addClass(clone, "logitem");
return clone.outerHTML;
}
break;
default:
break;
}
return "'" + this.clienttranslate_string(this.getTokenName(token_id)) + "'";
},
getTokenName : function(key) {
return this.gamedatas.token_types[key].name; // get name for the key, from static table for example
},
Note that in this case the server simply injects token_id as a name, and the client substitutes it for the translated name or the picture.
ggg.game.php:
$this->notifyAllPlayers('playerLog',clienttranslate('Game moves ${token_name}'),['token_name'=>$token_id]);
Now if you don't like raw log containing id instead of name but want name, and want substitution, you can use another parameter as id. The problem with that, it will work at first, but if you reload game using F5 you will loose your additional parameters, why? Because when game reloads it does not actually send same notifications, it sends special "hitstorical_log" notification where all parameters not listed in the "log" are removed. There is a hack (feature) to circumvent that, called recursive parameters. I.e. you can send stuff like this:
$this->notifyAllPlayers('playerLog',clienttranslate('Game moves ${token_name_rec}'),
['token_name_rec'=>['log'=>'${token_name}',
'args'=> ['token_name'=>clienttranslate('Boo'), 'token_id'=>$token_id, 'i18n'=>['token_name'] ]
]
]);
and in format_log_recursive
var key = 'token_name';
if (typeof args[key] == 'string' && typeof args['token_id'] == 'string') {
args[key] = this.getTokenDiv('token_id', args);
}
Important: In the client-side 'format_string_recursive' method, the 'args' parameter will only contain arguments passed to it from the server in the second parameter (the string that is contained in 'clienttranslate'.
High-Definition Graphics
Some users will have screens which can display text and images at a greater resolution than the usual 72 dpi, e.g. the "Retina" screens on the 5k iMac, all iPads, and high-DPI screens on laptops from many manufacturers. If you can get art assets at this size, they will make your game look extra beautiful. You could just use large graphics and scale them down, but that would increase the download time and bandwidth for users who can't display them. Instead, a good way is to prepare a separate graphics file at exactly twice the size you would use otherwise, and add "@2x" at the end of the filename, e.g. if pieces.png is 240x320, then pieces@2x.png is 480x640.
There are two changes required in order to use the separate graphics files. First in your css, where you use a file, add a media query which overrides the original definition and uses the bigger version on devices which can display them. Ensuring that the "background-size" attribute is set means that the size of the displayed object doesn't change, but only is drawn at the improved dot pitch.
.piece {
position: absolute;
background-image: url('img/pieces.png');
background-size:240px 320px;
z-index: 10;
}
@media (-webkit-min-device-pixel-ratio: 2), (min-device-pixel-ratio: 2), (min-resolution: 192dpi)
{
.piece {
background-image: url('img/pieces@2x.png');
}
}
Secondly, in your setup function in javascript, you must ensure than only the appropriate one version of the file gets pre-loaded (otherwise you more than waste the bandwidth saved by maintaining the standard-resolution file). Note that the media query is the same in both cases:
var isRetina = "(-webkit-min-device-pixel-ratio: 2), (min-device-pixel-ratio: 2), (min-resolution: 192dpi)";
if (window.matchMedia(isRetina).matches)
{
this.dontPreloadImage( 'pieces.png' );
this.dontPreloadImage( 'board.jpg' );
}
else
{
this.dontPreloadImage( 'pieces@2x.png' );
this.dontPreloadImage( 'board@2x.jpg' );
}
Cool realistic shadow effect with CSS
If you wish to make a shadow effect for game pieces that are not rectangle, do not use box-shadow but use filter, which is supported by recent major browsers. This way, you can use the alpha channel of your element to drop a shadow. This even work for transparent backgrounds, so that if you are using the "CSS-sprite" method, it will work!
For instance:
.xxx-token {
filter: drop-shadow(0px 0px 1px #000000);
}
Using the CSS classes from the state machine
If you need to hide or show stuff depending on the state of your game, you can of course use javascript, but CSS is hand enough for that. The #overall-content element does change class depending on the game state. For instance, if you are in state playerTurn, it will have the class gamestate_playerTurn.
So now, if you want to show the discard pile only during player turns, you may use:
#discard_pile { display: none }
.gamestate_playerTurn #discard_pile { display: block }
This can be used if you want to change sizing of elements, position, layout or visual appearance.
More readable JS: onEnteringState
If you have a lot of states onEnteringState and friends become rather wild, you can do this trick to call some method dynamically.
onEnteringState: function(stateName, args) {
console.log('Entering state: ' + stateName, args);
// Call appropriate method
var methodName = "onEnteringState_" + stateName;
if (this[methodName] !== undefined) {
console.log('Calling ' + methodName, args.args);
this[methodName](args.args);
}
},
onEnteringState_playerTurn: function(args) { // this is args directly, not args.args
// process
},
onEnteringState_playerSomethingElse: function(args) {
// process
},
Note: since its ignores the undefined functions you don't have define function for each state, but on the other hand you cannot make typos. Same applies to onUpdateActionButtons except you pass 'args' to method, not args.args, and for onLeavingState where you don't pass anything.
Game Model and Database design
Database for The euro game
Lets say we have a game with workers, dice, tokens, board, resources, money and vp. Workers and dice can be placed in various zones on the board, and you can get resources, money, tokens and vp in your home zone. Also tokens can be flipped or not flipped.
Now lets try to map it, we have
- (meeple,zone)
- (die, zone, sideup)
- (resource cube/money token/vp token,player home zone)
- (token, player home zone, flip state)
We can notice that resource and money are uncountable, and don't need to be track individually so we can replace our mapping to
- (resource type/money,player home zone, count)
And vp stored already for us in player table, so we can remove it from that list.
Now when we get to encode it we can see that everything can be encoded as (object,zone,state) form, where object and zone is string and state is integer. The resource mapping is slightly different semantically so you can go with two table, or counting using same table with state been used as count for resources.
So the piece mapping for non-grid based games can be in most case represented by (string: token_key, string: location, int: state), example of such database schema can be found here: dbmodel.sql and class implementing access to it here table.game.php.
Variant 1: Minimalistic
CREATE TABLE IF NOT EXISTS `token` ( `token_key` varchar(32) NOT NULL, `token_location` varchar(32) NOT NULL, `token_state` int(10), PRIMARY KEY (`token_key`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
| token_key | token_location | token_state |
|---|---|---|
| meeple_red_1 | home_red | 0 |
| dice_black_2 | board_guard | 1 |
| dice_green_1 | board_action_mayor | 3 |
| bread | home_red | 5 |
Now how we represent resource counters such as bread? Using same table from we simply add special counter token for bread and use state to indicate the count. Note to keep first column unique we have to add player identification for that counter, i.e. ff0000 is red player.
| token_key | token_location | token_state |
|---|---|---|
| bread_ff0000 | tableau_ff0000 | 5 |
See php module for this table here https://github.com/elaskavaia/bga-sharedcode/blob/master/modules/tokens.php
Variant 2: Additional resource table, resource count for each player id
CREATE TABLE IF NOT EXISTS `resource` ( `player_id` int(10) unsigned NOT NULL, `resource_key` varchar(32) NOT NULL, `resource_count` int(10) signed NOT NULL, PRIMARY KEY (`player_id`,`resource_key`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ALTER TABLE resource ADD CONSTRAINT fk_player_id FOREIGN KEY (player_id) REFERENCES player(player_id);
| player_id | resource_key | resource_count |
|---|---|---|
| 123456 | bread | 5 |
Variant 3: More normalised
This version is similar to "card" table from hearts tutorial, you can also use exact cards database schema and Deck implementation for most purposes (even you not dealing with cards).
CREATE TABLE IF NOT EXISTS `token` ( `token_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `token_type` varchar(16) NOT NULL, `token_arg` int(11) NOT NULL, `token_location` varchar(32) NOT NULL, `token_state` int(10), PRIMARY KEY (`token_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
| token_id | token_type | token_arg | token_location | token_state |
|---|---|---|---|---|
| 22 | meeple | 123456 | home_123456 | 0 |
| 23 | dice | 2 | board_guard | 1 |
| 26 | dice | 1 | board_action_mayor | 3 |
| 49 | bread | 0 | home_123456 | 5 |
Advantages of this would be is a bit more straightforward to do some queries in db, disadvantage its hard to read (as you can compare with previous example, you cannot just look at say, ah I know what it means). Another questionable advantage is it allows you to do id randomisation, so it hard to do crafted queries to cheat, the down side of that you cannot understand it either, and handcraft db states for debugging or testing.
Database for The card game
Lets say you have a standard card game, player have hidden cards in hand, you can draw card from draw deck, play card on tableau and discard to discard pile. We have to design database for such game.
In real word to "save" the game we take a picture a play area, save cards from it, then put away draw deck, discard and hand of each player separately and mark it, also we will record current scoring (if any) and who's turn was it.
- Framework handles state machine transition, so you don't have to worry about database design for that (i.e. who's turn it is, what phase of the game we are at, you still have to design it but part of state machine step)
- Also framework supports basic player information, color, order around the table, basic scoring, etc, so you don't have to worry about it either
- The only thing you need in our database is state of the "board", which is "where each pieces is, and in what state", or (position,rotation) pair.
Lets see what we have for that:
- The card state is very simple, its usually "face up/face down", "tapped/untapped", "right side up/up side down"
- As position go we never need real coordinates x,y,z. We need to know what "zone" card was, and depending on the zone it may sometimes need an extra "z" or "x" as card order. The zone position usually static or irrelevant.
- So our model is: we have cards, which have some attributes, at any given point in time they belong to a "zone", and can also have order and state
- Now for mapping we should consider what information changes and what information is static, later is always candidate for material file
- For dynamic information we should try to reduce amount of fields we need
- we need at least a field for card, so its one
- we need to know what zone cards belong to, its 2
- and we have possibly few other fields, if you look closely at you game you may find out that most of the zone only need one attribute at a time, i.e. draw pile always have cards face down, hand always face up, also for hand and discard order does not matter at all (but for draw it does matter). So in majority of cases we can get away with one single extra integer field representing state or order
- In real database both card and zone will be integers as primary keys referring to additional tables, but in our case its total overkill, so they can be strings as easily
Variant 1: Minimalistic
CREATE TABLE IF NOT EXISTS `card` ( `card_key` varchar(32) unsigned NOT NULL, `card_location` varchar(32) NOT NULL, `card_state` int(11) NOT NULL, PRIMARY KEY (`card_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
Variant 2: More normalised
This version supported by Deck php class, so unless you want to rewrite db access layer go with this one
CREATE TABLE IF NOT EXISTS `card` ( `card_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `card_type` varchar(16) NOT NULL, `card_type_arg` int(11) NOT NULL, `card_location` varchar(16) NOT NULL, `card_location_arg` int(11) NOT NULL, PRIMARY KEY (`card_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
Note: if you using this schema, some zones/locations have special semantic. The 'hand' location is actually multiple locations - one per player, but player id is encoded as card_location_arg. If 'hand' in your game is ordered, visible or can have some other card states, you cannot use hand location (replacement is hand_<player_id> or hand_<color_id>)
Game Modules
Including your own JavaScript module
Ingredients: ggg.js, modules/ggg_other.js
- Create ggg_other.js in modules/ folder and sync
- Modify ggg.js to include it
define([ "dojo", "dojo/_base/declare", "ebg/core/gamegui", "ebg/counter",
// load my own module!!!
g_gamethemeurl + "modules/ggg_other.js" ], function(dojo,
declare) {
Including your own PHP module
Ingredients: ggg.game.php, modules/ggg_other.php
- Create ggg_other.php in modules/ folder and sync
- Modify ggg.game.php to include it
require_once ('modules/ggg_other.php');
Assorted Stuff
Out-of-turn actions: Un-pass
Ingredients: ggg.js, ggg.game.php, ggg.action.php, states.inc.php
In multiplayer game sometimes players passes but than they think more and want to un-Pass and redo their choice. To re-active a player who passes some trickery required.
Define a special action that does how and hook it up.
In states.inc.php add an action to mmultipleactiveplayer state to "unpass", lets call it "actionCancel"
In ggg.action.php add action hook
public function actionCancel() {
self::setAjaxMode();
$this->game->actionCancel();
self::ajaxResponse();
}
In ggg.game.php add action handler
function actionCancel() {
$this->gamestate->checkPossibleAction('actionCancel');
$this->gamestate->setPlayersMultiactive(array ($this->getCurrentPlayerId() ), 'error', false);
}
Finally to call this in client ggg.js you would do something like:
onUpdateActionButtons: function(stateName, args) {
if (this.isCurrentPlayerActive()) {
// ...
} else if (!this.isSpectator) { // player is NOT active but not spectatoe
switch (stateName) {
case 'playerTurnMuliPlayerState':
this.addActionButton('button_unpass', _('Oh no!'), 'onUnpass');
break;
}
}
}
onUnpass: function(e) {
this.ajaxcall("/" + this.game_name + "/" + this.game_name + "/actionCancel.html", {}, this); // no checkAction!
}
Multi Step Interactions: Select Worker/Place Worker - Using Selection
Ingredients: ggg.js
Simple way to implement something like that without extra states is to use "selection" mechanism. When user click on worker add some sort of class into that element i.e. 'selected' (which also have to have some indication by css i.e. outline).
Than user can click on placement zone, you can use dojo.query for "selected" element and use it along with zone id to send data to server. If proper worker is not selected yet can give a error message using this.showMessage(...) function.
Extra code required to properly cleanup selection between states
Multi Step Interactions: Select Worker/Place Worker - Using Client States
Ingredients: ggg.js
I don't think its documented feature but there is a way to do client-only states, which is absolutely wonderful for few reasons
- When player iteration is two step process, such as select worker, place worker, or place worker, pick one of two resources of your choice
- When multi-step process can result of impossible situation and has to be undone (by rules)
- When multi-step process is triggered from multiple states (such as you can do same thing as activated card action, pass action or main action)
So lets do Select Worker/Place Worker
Define your server state as usual, i.e. playerMainTurn -> "You must pick up a worker". Now define a client state, we only need "name" and "descriptionmyturn", lets say "client_playerPicksLocation". Always prefix names of client state with "client_" to avoid confusion. Now we have to do the following:
- Have a handler for onUpdateActionButtons for playerMainTurn to activate all possible workers he can pick
- When player clicks workers, remember the worker in one of the members of the main class, I usually use one called this.clientStateArgs.
- Transition to new client state
onWorker: function(e) {
var id = event.currentTarget.id;
dojo.stopEvent(event);
... // do validity checks
this.clientStateArgs.worker_id = id;
this.setClientState("client_playerPicksLocation", {
descriptionmyturn : "${you} must select location",
});
}
- Have a handler for onUpdateActionButtons for client_playerPicksLocation to activate all possible locations this worker can go AND add Cancel button (see below)
- Have a location handler which will eventually send a server request, using stored this.clientStateArgs.worker_id as worker id
- The cancel button should call a method to restore server state, also if you doing it for more than one state you can add this universally using this.on_client_state check
if (this.isCurrentPlayerActive()) {
if (this.on_client_state && !$('button_cancel')) {
this.addActionButton('button_cancel', _('Cancel'), dojo.hitch(this, function() {
this.restoreServerGameState();
}));
}
}
Note: usually I call my own function call this.cancelLocalStateEffects() which will do more stuff first then call restoreServerGameState(), same function is usually needs to be called when server request has failed (i.e. invalid move)
Note: If you need more than 2 steps, you may have to do client side animation to reflect the new state, which gets trickier because you have to undo that also on cancellation.
Code is available here sharedcode.js (its using playerTurnPlayCubes and client_selectCubeLocation).