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The focus of this journal entry is on how I integrated In-App purchase capabilities into my Unity game. I'm not going to discuss strategies for earning money from players, or how I used the IAP assets once they were integrated.
I began by purchasing a Windows Phone 8 IAP Unity package by Zaubersee at Assetstore.unity3d.com to get things going. Like with other third-party Windows Phone 8 assets I've used, it didn't work out of the box. I also struggled a bit with my interpretation of the documentation. After creating a new Unity test project, importing the asset, and deploying to my Windows Phone, I got this error in the status window of the demo scene:
Exception from HRESULT: 0x805A0194
I overcame this error by submitting the test project as a beta app to the Windows Phone Dev Center. I believe the asset developer tried to explain this in the documentation, but I thought that submitting a beta version of the app was merely a suggestion.
Here's what I did to build a functional test project:
Taking this idea a step further, I opened the VS 2013 project for the real Hamster Chase, set the product ID to be that of the beta app, and then deployed it in debug mode to the device.
Since the test app worked well, I figured it would work the first time in my game...but it did not. The app crashed after the app was restored upon me dismissing Microsoft's purchase screen.
My guess is that in the onWP8inAppPurchased callback, I wasn't supposed to do stuff with Unity objects like changing TextMesh text values or calling Transform.GetChild(). I proceeded to move all that code into a function called DoStuffAfterPurchaseFinished(), and then I call Invoke("DoStuffAfterPurchaseFinished", 0.2f) within the callback. The crash went away after that.
I was about to move on entirely when I discovered that Prime31 was offering a free Windows Phone 8 In-App package (while the offer lasted) at Prime31.com . I've worked with Prime31's assets before, and I like their brand.
I decided to make a test app with Prime31's IAP package. Using the lessons learned from integrating Prime31's WinPhoneAds package and the Zaubersee package; I was able to quickly get a functional Prime31 In-App demo app.
I then imported the Prime31 package into the official Hamster Chase app, and tested it. To my surprise, I had the same crash I had with the Zaubersee asset when trying to manipulate GameObjects within the purchase completion callback. As before, the Invoke workaround made the crash go away.
In the end I got both the Zaubersee and Prime31 assets to work; but I decided to stick with the Prime31 asset primarily out of brand loyalty and the expectation of continued upkeep.
In one effort to monetize Hamster Chase, I wanted to have ads appear in it. It took me a while to decide where to put the ads; the articles at Inneractive.jira.com and Streetfightmag.com were helpful with my decision making. I decided to have ads appear briefly at the end of each level, and at random in the hamster cage in the form of a comic strip balloon coming out of a hamster's mouth.
I created an AdDuplex account on Adduplex.com . AdDuplex treated me as both someone who wanted ads in their game, and someone who wanted to put their own ads in other games. They wouldn't let me submit my game before it was published.
I created a Microsoft pubCenter account on Pubcenter.microsoft.com . I was able to create one "ad unit" (which is a fancy way of saying "an ad banner to appear in the game" I think), but I had trouble changing it later and adding more ad units. I was informed by an online help desk representative that I couldn't do those things until my game was published.
I made a new test project in Unity and imported the AdRotator Unity package into it. The first thing I noticed was the AdRotatorDemo scene had no AdRotator components in it. I figured out which ones belonged, and added them manually. Later on I discovered the menu item to do it: GameObject => Create Other => AdRotator. I clearly glazed right over "this will appear in the game object create menu" in their documentation; but in my defense I'm used to the vendor having the demo scene all set up for me.
I was puzzled by the setup: On the pubCenter and AdDuplex portals, I could choose the size of my ads. In the AdRotatorManagement script was a dropdown where I could choose the size of the banners; but none of the selections matched the sizes I assigned in the portals! I decided to just leave all the component settings unchanged.
My attention turned to defaultAdSettingsWP8. It's the file in the Unity project where you set up all your ad portal identities. I discovered I could comment out the elements corresponding to providers that I did not sign up for, and they would not be included in the rotation of served ads. I like how the developer filled everything in with demo values; it made it easier to confirm that the values I would replace them with were formatted correctly.
I then proceeded to Build and Run the project on my phone...and of course, no ads appeared. My first inkling was that I glazed over something else important in the documentation.
I opened the VS 2013 solution and ran it again. I got at least one System.IO.FileNotFound exception. Between seeing that, and revisiting the documentation, I found that I was missing several assemblies. I made sure to have the following References in my project:
I deployed the project to my phone again, and the only ads that would appear were test ads for AdDuplex. The debug log reported once that it successfully got a pubCenter ad, but I don't think it ever appeared. Subsequent attempts to get pubCenter ads failed with no error description ever since. It could have been that pubCenter simply had no ads available at that moment; I never figured out what happened in the end.
I was about to settle for only using AdDuplex ads when I discovered that Prime31 was offering a free Windows Phone 8 Unity package for pubCenter ads (while the offer lasted) at Prime31.com . I've worked with Prime31's assets before, and I like their brand. I grabbed it right away and built a test app with it. There was one issue I had trying to get it working: I got this message trying to complete a purchase:
System.UnauthorizedAccessException: Invalid cross-thread access.
They quickly gave me a resolution which you can read at Support.prime31.com .
The test app worked fine after that; I was able to see pubCenter test ads. I understand that a provider doesn't want to feed live ads to a developer's test environment, but one of my peeves as a developer is not seeing a component work in live mode before the project is published. Right after the game was published, the test ads were replaced with live ads automatically.
In the end, I decided to run with Prime31 and pubCenter ads. I'd like to see AdRotator 2 mature a bit more before I consider using its capabilities. I don't know which ad provider is the best for my game, so I'm going to start with pubCenter. I won't be able to measure its effectiveness on Hamster Chase until the press release has been out for a while and more than a handful of people are playing it. Eventually I may try switching providers or my integration strategy to see if I can improve revenue.
I wanted to add Facebook integration to Hamster Chase for Windows Phone 8 in an effort to have players get word out of the game through social media in exchange for a reward.
A search on Google led me to Chillster's Facebook SDK at Forum.unity3d.com . It was free and also fairly new. I had a fair bit of trouble getting it to do what I wanted because of limitations I wouldn't accept, and because of my interpretations of the instructions. Ultimately I got it working. Here's a walkthrough I would have presented:
1. First you need to add your Windows Phone 8 app to your Facebook developer dashboard. Do this by going to Developers.facebook.com and clicking on Apps at the top. If your app doesn't exist, use Create a New App and fill the proceeding form out.
2. If your app already exists (like you wrote your game for iOS/Android first), you still need to set it up. On the left side of the app's dashboard page on Facebook is a menu item for Settings. Click on it. Hidden beneath your existing platform listings is a "+ Add Platform" button. I swear I went to this page half a dozen times and never saw that button. Click on it and add your app product ID (which you get from your Windows Phone Dev Center account) to the second line. Remove the dashes and make sure you don't have curly brackets.
I had to install the Facebook app on my phone before I could use Facebook integration.
1. Add Chillster's Facebook SDK asset to your Unity project (or better yet make a test project).
2. Look up at your Unity menu bar (File, Edit, Assets...). There should now be a Facebook menu. Go there and choose "Edit Settings" and fill those out.
3. Now go to the link I mentioned at the start of this section (http://forum.unity3d.com/threads/facebook-sdk-for-unity-plus-windows-phone-8.217907/ ), and read Chillster's official documentation for getting set up starting with step 2.1. You've already done step 2.3, so you can skip that step.
My goal was to make it so users could send app requests to friends which invited them to download my game. So when I found this in the code comments:
"... throw new UnityException("There is no Facebook AppRequest on Windows Phone 8"); ... "
I thought it was just an asset limitation. For a while I tried using FB.API() to get the job done starting with getting a friends list. I simply could not get that to work until I finally called"FB.API("me\friends"...)" (note the direction of the slash), and making sure to include the "user_friends" permission at the login. Then I tried a number of ideas to send an app request by using FB.API(); all failed. I ultimately settled for just doing a post on a player's feed by calling:
It doesn't show the link name or caption in my feed; but I'm going to leave those in anyway in case they someday appear through either asset or Facebook-side updates.
I ultimately released Hamster Chase with Facebook integration. It works for posting to Facebook feeds, and it was nice to see it work without having to publish the game first (unlike other assets I integrated with). I'm sure it won't be long before future versions of Facebook integration assets are released with easier setups and more features; including app requests.
A couple weeks ago, a friend tipped me off to a free Microsoft Unity workshop that was held in Orlando, FL. Though reluctant at first, I decided to go. I needed to get out of my lone wolf developer cave, meet other folk, and see what Microsoft could do to help me port my mobile games to Windows Phone 8. Long story short, it was a good experience and I was on my way to getting those games ported.
Having released Hamster Chase for iOS and Android already, I figured getting it deployed to my Windows Phone would be a breeze...but it wasn't.
The first step was to make a branch of Hamster Chase for Unity 4. Right away I got a number of new compiler warnings; mostly about the GameObject.active setter being deprecated for GameObject.SetActive(). After fixing and re-testing all of the related code, I found another issue: in Unity 3.x, I would set certain objects to be "static" (motionless) objects at runtime when they wouldn't move, and then unset the static flag before they were to move again. I thought this would provide an optimization in rendering, and possibly with the physics too. In unity 4.5 at least, it would seem that once an object is static, it is always static and would never move again. I fixed this by simply never setting the static flag in the first place.
Those were the only two issues I dealt with during the upgrade process. With all the compiler warnings and static behavior fixed, I was ready to change the platform to Windows Phone 8.
After changing the platform, I attempted to build the project. Right away, I got errors related to my Prime31 Android & iOS plugins. Prime31 is an organization that develops plugins which enable developers to implement social network check-ins, ads and in-app purchases. It's a shame they also don't include a 'Monetization for dummies' manual with those plug-ins, but I digress. I wish I had retained the exact error messages for others to find on Google, but alas, I didn't think of it at the time. I ultimately fixed the errors by deleting all of the Prime31 plug-ins, and changing my side of the code to only look for them in the iOS and Android platforms.
My next build attempt gave me these more memorable error messages:
There are three ways you can deal with these:
I opted to do 3 to keep the binary size at a minimum; of course that took a fair bit of time to do.
After fixing all that, I managed to get Hamster Chase to deploy to an emulator. I noticed the splash screen was of Unity and not from the game; nor was there a setting to change the splash screen in the Player settings. I hope to deal with that from the Visual Studio project itself later. I was happy...
...and then my happiness was shattered once I got it deployed onto my new Nokia Lumia 521. I was barely getting 15 FPS on the device! The game was choppy, overlays that should have faded in instead went straight to fully visible, and popup menu animations were even choppier than the game.
After attaching the Unity profiler to my phone via IP address (it takes like 45 seconds to connect), I pinned the main problem to a GameObject.FindObjectsOfType being called in every frame. After fixing that, the game was slightly faster. It was still far from the silky smoothness I see in most mobile games. The main culprit is now transparent rendering which is taking up over half the workload each frame. In the main menu alone it takes 18ms per frame. I had the same problem with Hyperspace Pinball; and it took months to optimize it just enough to even be releasable. I am not going through that again.
Thinking the problem was that the VertexLit shader was slow on mobile, I decided to try my hand at writing two transparent mobile shaders:
Simple lit Shader:
After using these on the most prominent main menu objects, I didn't get a visible performance gain.
It occurs to me that Hamster Chase was developed before Unity had Sprites and Sprite Renderers. In Hamster Chase, the existing "Sprites" are rendered using regular MeshRenderers and VertexLit shaders on simple squares. I think if I changed my "Sprites" to be actual Unity Sprites, things would render faster. I'll have to ponder if and how I would accomplish that because it could easily be a ton of work.
I still have trouble wrapping my head around the fact the game is this slow as is using out of the box shaders on such a sophisticated piece of equipment. It's notably faster on both iOS and Android; what am I missing here?
In December 2013 I entered into a small "venture" with the Skillz team to make a simple game called Tiltz Tournament where players could compete for game coins or real money. I developed the core game, and they provided the tools for matchmaking and account management. Here I write about my experiences in hopes other Skillz developers can benefit, find solutions to issues, and avoid the mistakes I made. This entry is laid out in six parts:
If you're the impatient type like I am, just go to QUICK BUILDING REFERENCE to see how to build a Skillz-enabled game for your iPhone.
After the core game was created in Unity 3 and tested on my iPhone, I followed the instructions on the Skillz homepage to integrate their SDK into the Unity side of the game. Upon trying to import the Unity package, Unity crashed. This was because the package I got was exported from Unity 4 and is not compatible with Unity 3. My project would no longer open in Unity 3. I fixed it by doing the following:
1. Going into Finder and deleting the SkillzDelegate prefab from the project's folder.
2. Starting Unity
3. Making my own Skillz prefab by:
A. Making a new empty game object
B. Adding the Skillz and SkillzDelegate scripts to it.
C. In my Unity Project tab, click on Create, select Prefab.
D. Drag and drop the game object to the prefab.
Before continuing the integration, I wanted to make sure I could still build the project and deploy it to my iPhone. Since Skillz requires iOS 7, I had to go into my Unity project settings and make sure I maxed out my iOS version settings. Unity's deployment target only went up to 6.1, so I had to change the app deployment target to 7 from XCode later on. I also had to make sure my project was set up for iPhone only. I then proceeded to build the project from Unity so it would generate the XCode project.
XCode didn't open automatically because Unity 3 doesn't know how. Still, the iPhone assets were created, and I was good to move forward.
The first thing that tripped me up in XCode was that the deployment target (at the top left next to the Play and Stop buttons) was set to the simulator, so I got a bunch of build errors. I plugged in my iPhone 4 and made sure the deployment target was my iPhone.
I went to the General tab of the project, made sure the deployment target was iOS 7, and that the Device Orientation was only Portrait. Scrolling down further I noticed that some app icons were missing. Again, Unity 3 didn't know to put them there. I had to generate icons in the missing dimensions using The Gimp, and import them into my XCode project folder. Then I assigned them to the icons in the General tab.
I then followed Skillz' instructions to integrate their SDK into the XCode project.
After that, I tried building using the Command-B button. I got several linker errors indicating the std library was missing, and some Game Center-related functions were missing. A little puzzling, but I found the solutions. Under the Build Settings tab, I selected (All) and (Combined) at the top. Then I scrolled to the section called "Apple LLVM 5.0 - Language - C++." There was an entry for "C++ Standard Library." I set it to "libstdc++" and that fixed the std linker errors. After that, I went to the Capabilities section and turned on Game Center (it is bound to my Apple account so you may not have this problem).
I then attempted to build the app again, and it succeeded. I was then able to deploy it to my iPhone 4. Of course I did not actually invoke Skillz functionality in the project, so the app behaved just as it did before.
At the top of the screen was the pesky status bar (battery life, time, etc.). I made it go away in subsequent builds by going to info.plist, adding "View controller-based status bar" and setting it to NO.
The next step was to set up the tournaments on the Skillz developer portal. My journey began on the page where I had to enter Parameters. It took me a while to realize that the Parameter list was a collection of every possible unique property of a game for any tournament, and the Parameter list values are the DEFAULT values that the tournament-specific parameters get populated with on the developer portal in the next page. In my game, the Parameters which defined a unique game were the duration of the game and the existence of obstacles. So on my developer portal, Tiltz Tournament has a grand total of two parameters called "TimeLimit" and "Obstacles". TimeLimit has no whitespace because I got errors trying to fetch "Time Limit" from the parameter dictionary from Skillz, and decided I didn't want to deal with it. The value of "Obstacles" is "On" because most tournaments have them turned on. The value of "TimeLimit" is "90" for the same reason.
As for the Tournament list, I could not add or remove entries. I could only change existing ones. Furthermore, the entry fee and player counts seem to be linked. I'm cool with that. I also decided I didn't need more tournaments than they had existing; having more than eight would be overwhelming to the player I think. I ended up using 5 tournament slots for myself, and renaming the other 3 tournaments to N/A so the Skillz team knew not to include them. One of the N/A tournaments was a special developer tournament where I made "TimeLimit" a value of 5. This enabled me to test the game ending due to the clock running out without having to wait 90 seconds.
By the way, after you fill out the Parameters and Tournament List, you go into sandbox mode automatically. Another important bit: You can ALWAYS GO BACK AND CHANGE YOUR TOURNAMENTS, PARAMETERS, AND MOST ANYTHING ELSE. I find that to be a particularly helpful facet of the Skillz developer portal.
What threw me off the most was not understanding the flow that Skillz had intended for the game. The flow is basically this:
The main menu is the launch point for a continuous back-and-forth between your game and Skillz. If a player quits from Skillz, only then should they be taken back to your main menu.
As I implemented the Skillz functionality into my game, I learned that the Skillz package doesn't seem to like Unity calling Application.LoadLevel from a Skillz callback; at least in Unity 3. When you write your game in Unity 3, you should make sure you have a reset function in one of your scene components so that you can effectively "reload" the scene without actually reloading it. Even if it doesn't crash for you like it did for me, you save yourself the time of reloading all the scene assets. Be sure that your reset function also pauses the music.
One thing I was not a fan of were the developer TODO comments in the Skillz scripts where I had to write my own code. This is because if I download a new package, I could overwrite their old scripts and therefore my changes to them. I wrote my own static class with functions to be called from Skillz's callbacks to minimize any pain of re-importing their scripts.
After finishing the Skillz integration on the Unity side, I was ready to take a test drive in sandbox mode on my iPhone. After building and running it, and learning the lessons that I wrote about above, I was able to get it working smoothly with two exceptions.
First, there was a bug where if you tilt your iPhone in a way ideal for landscape, and you quit the game, the Skillz interface would get all glitchy and messed up looking. I fixed this by opening Classes/AppController.mm, going to the function
(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *window)
and commenting out the landscape enumerations so that they were not included in the return value.
Secondly, I noticed my app icon was missing from the Skillz interface next to the "Go back to " button. I never did figure out how to fix that.
Now it was almost time to make the release. I turned off sandbox mode, uploaded an App Store-provisioned .ipa file to my Skillz developer portal, clicked the Sync button on the Skillz developer portal, then clicked on the Play button in XCode to build and deploy it to my iPhone. I kept getting this error when going into Skillz: "Sign Up Error - Invalid client serv request." After going back and forth with the Skillz team, I figured out that the problem was the manner in which I installed the app onto my phone. I fixed it by deleting the app from my iPhone, and then adding the .ipa file (the one I uploaded to Skillz) to my iPhone by using XCode Organizer. After doing that, the error was gone, and testing seemed to work out.
In subsequent builds, I got the same Sign Up error again because I had forgotten to upload and Sync my latest .ipa to the Skillz portal.
I also asked the Skillz team to help me test because I only have one device, and they have several they could test with at the same time. Besides that, it's also in their best interests that the game is solid Posted Image.
After all that, I had Skillz help me with the app description and the app rating. I then submitted the game to the App Store.
The first release of my app was with the Skillz 2.x SDK. I summarily made a new build with a 3.x version of the SDK. None of the Unity-side scripts appeared to change, though I made sure all of the non-Unity assets were updated.
I accidentally tested on a device that was not connected at the time. Once the game attempted to enter the Skillz portal, I got a notification that the device was not on the internet. Nothing happened after that for an indefinite period of time. This will be a cause of frustration for players, so in a subsequent update I will use Unity's functionality to determine whether the device is online when the player taps the play button. Keep in mind the device could still lose connection in the game (like if they're playing and get on an elevator, or they go out of wi-fi range). I informed my contact over at Skillz about it.
Here is the process I would undertake doing a build with Unity 3 from scratch in December 2013:
1. Follow the Skillz instructions for importing Skillz assets into your Unity game (but don't import any prefabs unless you're 100% sure they're Unity 3)
2. In Unity, make sure your build target is iPhone only and using the most recent iOS version settings possible. Make sure your orientation is Portrait.
3. In Unity, do a Build and Run. Select the Replace option (since I assume you want to build from scratch).
4. After Unity finishes what it's doing, open XCode to the created project if it's not there already.
5. Follow the Skillz instructions for integrating the Skillz SDK
6. Make sure your deployment target is iOS 7.0
7. Make sure your orientation is Portrait.
8. Make sure all your icons in the General tab of XCode are assigned.
9. Make sure all your necessary capabilities are assigned in the Capabilities tab of XCode.
10. Open Classes/AppController.mm, go to the function
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *window)
and comment out the landscape enumerations so that they are not included in the return value.
11. Under Build Settings, scroll to the section called "Apple LLVM 5.0 - Language - C++." There is an entry for "C++ Standard Library." Set it to "libstdc++"
12. Go to info.plist, add "View controller-based status bar appearance" and set it to NO.
13. Connect an iPhone to your machine and make sure XCode is set to build and deploy to it.
14. Go to the Product menu and select Clean
15. Click on the Play button to build and run.
When developing Domino Arena, I experimented with using diamond/crystal shaders for the dominoes while deciding the look and feel of the game. I found a mobile diamond shader at Wiki.unity3d.com by BurningThumb. It worked great for most PC's (there was one report of the dominoes not rendering however), but it was slow on my Asus EEE tablet. I could not get a frame rate better than 30 fps during normal game play.
The Unity profiler revealed that much of the time spent working in each frame was with transparent rendering; partly because of the dominoes, and partly because I called GUI.DrawTexture() way too much (which I fixed).
I'm very inexperienced with shader development, but I figured the least I could try was commenting out all code in the shader that had the word "Transparent" in it. To my surprise it actually had the desired effect: The frame rate went back up to 60 fps, and the diamond dominoes still looked like diamond dominoes with an unexpected caveat: They look transparent where they did not before. I don't exactly know why (again, I'm not an experienced shader developer) but it wasn't a big deal since dominoes don't obstruct each other during normal game play anyway.
Here's the shader code I ended up with (you can tell which parts I commented out):
If you want to see it in action, just check out my game Domino Arena when it comes to Android!
With every new project I try to make better tools to carry into my future projects. One of them has to do with the game configuration and PlayerPrefs. There are two issues I have with PlayerPrefs:
So I decided to make my own static class that not only addresses both issues, but does so in a way that I find convenient for organization. I call this class the "ConfigurationDirector."
The Preference Cache
For those of you who learn by staring at code first, or just want to copy it into your project, here you go:
In short, what I do is call PlayerPrefs functions when I need values that are not cached in memory, and just read from memory at each subsequent Get. When I Set values however, I have to write to both cache and PlayerPrefs. Setting is, however, a fairly rare event.
Doing a dictionary lookup at each frame is of course not as fast as just grabbing the preference value in Awake() or Start() into a member variable and using that member variable in Update() or OnGUI(); but I don't notice the speed hit even on an iPhone 3GS and I like knowing that the preference is always up to date so long as I use the ConfigurationDirector properly.
So you need to track your player's name, their high score, the class they're using for the current game, the color of their uniform, the game difficulty level, the music volume, the IP address of the most recent server they played on....and that's just the beginning!
I chose to bring order to that chaos by having my own system:
If I want to get the player's name, I do:
string name = ConfigurationDirector.Player.Name;
Doing this has two advantages: No more remembering the key you assigned to that preference from outside the ConfigurationDirector, and you know from the context (Player) that it's a player-specific preference. I also know that anything following "PlayerPrefs.CurrentSession" applies to the game in progress, and anything following "PlayerPrefs.Audio" must be related to volume controls. I'll let auto-complete do the walking for me.
This is how I manage configurations in my recent games, and it works well for my purposes. If you're not happy with how you maintain your game's configuration, or you forgot the preference key for the player name for the 8th time, it might be worth looking into doing something like this.
For the past few days I've been dealing with a puzzling issue in Unity: Every time I called Application.LoadLevel to change the scene in my game, this would appear in my console window:
The referenced script on this behaviour is missing!
This is despite the fact that I had no missing scripts! Based on my own logging, I determined this was happening before the next scene was loaded. I ultimately found that there was an internal issue with the prefabbed objects in the scene that was to be loaded (the ones that show in blue in the hierarchy window).
I was able to eliminate the warning by:
1. From the editor, open the scene that was to be loaded during the game.
2. Go through every prefabbed object and Revert to the original prefab state.
3. Go through every prefabbed object and change all the object properties back to the way I wanted them.
It was a bit of tedious work, but the warning stopped appearing after that. My guess is this happened because I deleted a script without detaching it from some of my prefab assets first.
I hope this helps someone out there who may be experiencing the same problem and just can't pin it down!
Unity developers are familiar with
But if you want a text field that only accepts numeric input, then you could accomplish it with some Regex filtering:
myText = Regex.Replace(GUI.TextField(myRect, myText), "[^.0-9]", "");
Now suppose you wanted to contain it all in a function. The first thing that comes to mind is:
string result = Regex.Replace(GUI.TextField(r, n.ToString()), "[^.0-9]", "");
Looks fine on the surface, but there's a glaring problem: It can't handle empty inputs. If you want to treat 0 as an empty input and change the function handle to it accordingly, you could do that. I chose to go this route:
string result = Regex.Replace(GUI.TextField(r, n.HasValue ? n.Value.ToString() : ""), "[^.0-9]", "");
Rather than processing an integer, I process a nullable integer. This way I can discern valid from invalid input without using sentinel values.
(Credit to Labs.kaliko.com for the expression ... and a special thanks to the author for actually including the namespace in their code snippet! )
I promised myself I would not do any more large projects without working in teams, but I never said anything about small ones. Even with the small ones however, I'm stuck with the same problem I have with all projects: I'm not that great at creative and artistic direction.
Consider my latest project "Domino Arena," possibly the smallest one I've done myself besides Paper Cowboys. It's a multiplayer "party" puzzle / action game where you have a playfield full of colored dominoes, and you manipulate places in the playfield where one domino knocks over more than one at a time such that as many dominoes as possible match your player's color.
You can see a concept video on YouTube:
I think it will take a tutorial and a little getting used to, but it could be fun. I'd at least like to pitch a beta around to see what people think when it's ready.
Now that the basic mechanics are defined, I need to figure out how the game will look. I've narrowed it down to three styles: Cartoon, "Jeweled" and semi-realism.
As a mobile developer, my first thought is always "cartoon" because all the popular and top selling apps that come to mind are all cartoony or at least have vibrant, pleasant art themes. Every "party" game I've played also shared similar traits. After looking at a bunch of mobile board game and Mario Party screen shots, I experimented with a scene using cell shading and six spotlights.
It's clear where all the dominoes are and everyone should be able to discern the blue from the gold dominoes...but the environment colors just don't look right to me. I'm concerned that if I make them brighter, then the dominoes will blend in more and players will have a more difficult time seeing them. If someone were to help with art direction, I bet this could work. Otherwise I can toy around with this a bit more.
During development I asked myself "what other games have game mechanics that rely on color?" The first game that came to mind was Bejewelled. After finding some gem shaders on the Unity Asset Store, I came up with a weird, wild theme of jeweled dominoes in dark scenes that keep the player's focus on the game's primary objects.
The word I would use is "bizarre." The mechanic and the style seem altogether foreign from anything I've played before...but that could be a good thing. I do like looking at the pretty colors, anyway. I could also have players "collect" the jeweled dominoes that match their color when a game is over, and have the grand total maintained on a leaderboard.
When I'm in doubt over style, I always turn to wood textures because i find them pleasant to look at. It's hard to see in the picture, but the dominoes are reflecting on the floor.
I thought this would look better as I was working on it; and the white dominoes on wood looked fine when the simulation began....but when they got colored, they just seemed out of place with the rest of the scene to me.
For me it's a close race between cartoony and jeweled with a lean toward jeweled. If I had to decide this moment, I would make a beta with a tutorial, three multi-player jeweled levels, computer player support, and just throw it out there and see what happens. If it gets a positive response, I'd work it to completion; otherwise it's still an eye catcher I can add to my portfolio.