Once the button is clicked I want to have the venues scroll through with a slot machine spinning animation using CSS3 and jQuery before a venue is selected. I thought about using -webkit-keyframes and changing the background position, but it's not the ideal animation I would like. 7,779 Slot Machine clip art images on GoGraph. Download high quality Slot Machine clip art from our collection of 41,940,205 clip art graphics.
By Bill Burton
Over the last year, I have heard many players complain that they are not having as many jackpots on the slot machinesas they used to have. I first heard this from a few of my friends who said they believed that the casinos were tightening the machines because the bad economy was forcing people to make fewertrips to the casino. I did not pay too much attention to this but then I started to notice other players posting the same opinions on several Internet forums.
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It seems many of the players have come to believe that every casino was lowering the paybackpercentage on all of their machines.
A month ago I was contacted by a newspaper reporter from Colorado who requested an interview with me. He said he was writing a story about the casinos lowering the payback on the slot machinesthat were making it harder for the players to win. He wanted my opinion on the subject and he was surprised by my answer.
Why Players Win Fewer Jackpots
I told him I do believe that some casinos may be ordering new machines with lower payout percentages but I did not believe that this was the main reason why players may not be winning as muchas they used to. I gave him the following reasons for my answer.
Over the years there have been many myths associated with casino gambling. One of the most common ones is the belief that a casino can raise and lower a machine's payback with the flip of aswitch. This is not true because the slot machines have a computer chip in them that determines the pay back percentage. These are set at the factory.
In order for a casino to change the pay back, they would have to change the chip. In most jurisdictions, there is paperwork that has to be filled and submitted to the Casino Control Commissionfor each machine if the chip is changed. It is time-consuming and the chips are very expensive. For this reason, the cost of changing the chip in numerous machines on the casino floor does notmake economical sense.
Many of the gambling jurisdictions around the country require the casinos to report the overall payout percentages on a monthly basis. (California is not one of the States) These figures are amatter of public record and are published in some newspapers and gaming publications. I looked back on these figures over the last year and saw that there was very little change in most casinosaround the country. In some instances, there were even some of the payback percentages had increased.
A reason why some players feel that they may not be winning as often is the fact that many players are making fewer trips to the casino so they are not playing as many sessions. So because theyare playing fewer sessions they will see fewer big jackpots and fewer winning sessions overall. It is all proportional.
Some players may have decided to play lower denomination machines. Many of the nickel and penny slot machines have a higher hit frequency, which means you will have many smaller wins but not asmany big jackpots.
How To Help Your Payback Percentages
If you still honestly believe that your casino is lowering the return rate on the slot machines you have several courses of action. The easiest thing to do is to play the older machines. It isdoubtful that a casino would go through the expense of putting a new chip in an older machine to lower the return rate. You can try a new casino. You may find that your luck is better at adifferent casino and a change is your routine will let you enjoy some new experiences.
You can switch to video poker. It is the only machine game that will let you know the payback of the machine by readingthe pay table. However, if you do decide to try video poker, make sure you learn the strategy or get a strategy card to bring along with you when you play.
Switch to the table games. Playing table games is exciting and they offer a lower house edge than the slot machines. Many casinos give free table game lessons so you can learn the basics beforeyou sit down.
Let me close by saying again that I do believe that there will be some machines on the casino floors with lower returns, however, I do not believe that is as widespread as the rumors would haveyou believe. The casinos are in competition with each other for your business so they do not want to alienate the players by offering games where nobody can win.
As a customer/player you always have the option of taking your business elsewhere. The ultimate decision of where to play is entirely up to you.
Until next time remember, luck comes and goes.....knowledge stays forever.
This is the fourth part of the Slot machine game in HTML5 (previous parts 1, 2, and 3) and this time we modify the game to support HTML5 offline mode, also known as HTML5 Application Cache.
Try out offline supported version here.
Word of warning. HTML5 offline mode is powerful but very fragile feature. It’s tricky to get right, but once you get it to work the mobile user experience can be very native app like.
Some problems you will encounter
- Browser refresh logic is confusing. Especially the fact that browser does not use updated manifest and resources when they change but only after next reload. Fortunately Javascript workarounds exists.
- Application cache file maintenance needs diligence. For example, browser will not reload any assets if this file is not modified.
- Externally linked resources do not generally work offline. This makes CDN use difficult.
- Web server has to use right MIME type and cache settings to reliably use application cache files. Most web servers don’t do this in default configuration.
- No reliable way to detect if page was loaded in online or offline mode.
- Chrome bypasses some restrictions (e.g. cross-domain issues) in the specification and what works in Chrome may not work anywhere else.
- Each browser has slightly different meaning and heuristic for using offline mode. For example if browser can load some unrelated pages but can’t currently load your app page it may not show your page in offline mode and simply shows “Can not reach the server error”. This may happen especially if it knows from last load that manifest has been updated. Then at other times, it may load page few times in offline mode even when connectivity has returned.
Manifest file
Web page must use application cache manifest file to support offline mode. This manifest file is specified in html tag of the page.
The file has listing of all content that page needs. For detailed explanation of each section, refer to Beginners guide to HTML5 application cache
Web Fonts
Web fonts must be hosted locally if you want to use them offline. Note that some web fonts may have licensing restrictions for local hosting.
The webfont.css defines the font face and loads true type file.
The file Slackey.ttf is hosted locally in css directory.
Web Server Support
Web server must use correct MIME type for text/cache-manifest application cache manifest. For example, in NGINX web server edit the mime.types and add following file type to MIME type mapping.
Browsers should check manifest every time page is loaded online, but it may not do this often enough if cache control is too long. Therefore, set short cache lifetime for the manifest files by adding this inside server section of NGINX configuration file. This forces cache lifetime of 1 minute to all *.appcache files.
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Verify with cURL that server response Content-Type has right MIME type and that the Expires and/or Cache-Control have correct 1 minute cache life time. If you get 404 error, make sure that site root configuration is set in http section.
Detecting online status
Currently only “reliable” method to do is to make Ajax request and check the response. There are some caveats
- Request may fail for other reasons, and this does not mean browser is in offline mode
- Offline status may change while user is in page, you may want to do repeat polling check.
- User may be in public WiFi that redirects requests to login server. This can confuse your app that gets response but is not what was expected.
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Slots game checks online status in parallel while game loads and only on startup. Slots game does not really need to know if it’s online or offline, but just writes the status on screen for debugging purposes.
Otherwise loading images, audio and other content should be fully transparent to your app. Think twice before doing separate logic for online and offline as things will get difficult. Best advice I can give is to that you write code for online use with proper handling for Ajax errors. In this way when app loads in online mode but loses network later in session (e.g. when user goes in subway tunnel), the experience does not break completely.
Testing
This is the part where things get interesting, offline is tricky to test because of caching and browser reload logic. See detailed lamentation about subject here in Dive into HTML5.
These are the best practices I’ve come up with. First, set browser manually to offline mode to try things out. e.g. in Firefox this is enabled from File->Work Offline.
Second, if you develop the game from local server, do not use http://localhost as host, but use real domain name that resolves to localhost. In this example I’ve used http://hexxie.com that supports wildcard subdomain. Any subdomain resolves to address 127.0.0.1.
In this way you can always start from scratch the offline debugging simply by changing subdomain name. For example I just used slotsoff1.hexxie.com, slotsoff2.hexxie.com, … etc.:
Note that at least Firefox asks each time if you allow offline content.
Before each deploy, remember to increment the version comment in manifest file, so web server notices that the file has changed and browser will refresh it on next load. Server does not look inside the manifest file, so it does not matter how you change the file, as long as it’s changed.
Good Luck!
Code is available in Github.