Gadgetory

the story of flappy bird should be a highly inspiring one for any mobile developer or any budding mobile developer this is the story of an app created by just a regular guy a 28 year old guy called dong Yuen it was a very simple app something that anyone could really build but it just happened to be in the right place at the right time and he got really rich and famous from it so this just goes to show you that you don't need a huge budget you don't need to be a coding genius you don't need a massive publishing company behind you if you have a relatively good game a simple idea and you make it then there's a chance that you can still be successful thanks to the distribution platform that is the Google Play Store and this really would be an easy app for anyone to build even if you're a complete beginner and especially if you use a tool like unity which just makes the whole process that much simpler that much quicker so in this video I'm gonna demonstrate that by showing you how to make a flappy birds game for Android in just 10 minutes using unity you'll go from a completely blank screen to a fully working game and with just a few extra tweaks things like a high score maybe a menu screen you'd be able to release this on the Play Store and who knows maybe make your own millions actually remember me when you're rolling in piles of cash of course before we begin you are going to need yourself a copy of unity and you need to set that up with the Android SDK I'll leave a link in the description down below to show you how to do that there's also going to be a link in the description down below which will take you to the post that goes with this video that will share a lot more detailed instruction all the source code etc so if this is a little bit speedy for you then go there and you can get more detailed information and go at your own pace so we have much time without further ado let's get to it let's get to it or to okay so first you're going to create a new project make sure it's a 2d project and I'm dragging in some sprites here into my scene that are ready-made if you want to make sure the sprites the same size as mine so you can follow along exactly then set the bird to be at position zero zero and point five scale and set the pipe there to four on the X&Y axis we're going to copy that we're going to make another one that's going to be upside down like so I'm going to rename this one pipe down we're going to add a rigidbody to the bird so select that and then inspector so they've add component and I'm going to add the constraint on the z-axis that'll stop him from spinning around and rotating now gonna add another component that being a polygon Collider that's his bound so he'll bump into things and unity will know when he touches something and we want to tag him as a player this will help us to refer to him later in the code drag the camera onto the bird in the hierarchy there on the left and that make sure that the camera moves in relation to the bird now we're going to add the same Collider this time a box Collider to a pipe and then to the other pipe we only need the Collider there no physics necessary now I'm making three new scripts in a folder I've traded in the assets folder there c-sharp scripts that's character pipe up and pipe down so basically a script for each of our three sprites we have open up the character script first we're going to make a public midget body 2d so that is the the physics attached to our character now I'll make a public float that's a an accessible number that we can change we're gonna make several of these ones gonna be the move speed one will be the flapping height and we can change that later on you'll see we're going to create a public game object for the pipe up and another one for the pipe down so that means we can access those elements in our script so first we need to tell unity where the rigid body is so our B equals getcomponent and then that's the rigidbody 2d we have attached to our game object there okay and now in the update method that's a method that's called repeatedly with as the game refresh we're going to add some velocity to our rigidbody the script the physics script attached to the character so this is going to keep the character moving constantly to the right and we're keeping the y-coordinate the same see I say our PE bilasa T Y therefore the y coordinate we're basically saying whatever the Y velocity is keeping like that okay now we're using an if statement so that means that the following code will only execute if this statement in the brackets here is true and we're saying that if the player clicks the mouse button then we're going to add some movement going upwards so that's going to be a flapping motion now a mouse button is translated as a screen touch anywhere when you save this and run it on Android okay now we're gonna do another if statement and this time we basically want to just detect when our character goes too high or too low so when they're out of bounds then we're going to kill them because we don't want to be able to fly over or below the pipes that look strange and it's cheating okay so now we're going to create a new method and this one's going to be called death and that's where we're going to handle our player death so yeah our method is any piece of code you closed in curly brackets and you can call it from anywhere else within your script so we're saying public void death void means that it's not returning any data it's just performing a function and public music can access it from other scripts we're gonna remove all velocity because we want to be stationary when you respawn then we're just going to literally move him by taking the transform their transform being his current position and setting it back to zero zero now we're going back in here we're going to add the component the script to our player character change these public variables here in the inspector and then there you go so that's why you make public floats like that so you can change them from outside of the script okay now you're going into your pipe up script and I'm creating a reference to our character object and also to our other pipe up pipe down object so again we need to tell unity where to find those two the character is going to look for an object with the character script attached to it we just added that component to our character sprite then we're going to put another if statement in the update to method which remember happens repeatedly every time the game's refreshed and we're gonna say if the distance between the character and the pipe is bigger than 30 then what we're going to do is we're going to destroy our pipe and we're going to create a new one ahead of us so basically when the pipe goes off the left of the screen because remember the character keeps moving forwards we need to disappear and we need a new pipe a new challenge to appear in front of us so now we're creating three random variables and these are random numbers and we want that because we want the pipes been slightly different positions each time so we're getting a position for the X for the Y and for the gap the distance between the two pipes the top and the bottom one we want to make sure that we move the pipe the correct distance in front each time but also add a little bit of an random element just to keep things fresh and keep things fun now we're going to instantiate meaning create a new version of this game object what is a game object with a small G unity will assume you're referring to this game object that the script is attached to so we're creating this new game object using a vector that's a position and we're making it in front of our character 30 spaces in front but at the same time adding on that random element and then we're keeping the height accurate with a slight random element as well I'm going to instantiate the other pipe the pipe down that's why we added that reference to the pipe down up there at the top and the reason we're doing that in this script rather than in the pipe down own script is because we've generated these random numbers and this way we can make sure that they stay aligned with each other without having to do some you know do Hickory to make sure that the distance stays the same by sharing those random variables just makes more sense to put it here you'll see how it all works in a moment and then we're going to destroy this game object I want to create the new pipe ahead when used to destroy the old one who don't do that they're going to keep popping up ahead and it will take up a lot of memory ok now we're creating one more method and this is going to be one of the most useful methods you use a lot in unity is the on collision enter 2d so that means that when something touches the collider this happens and we're saying when the thing that touches it has the tag player remember we added the player tag to our character then we're going to call that public method from our character script called death so we're saying character death that's the great thing about public method that means that you can call that bit of code from other scripts attached to other objects so add the component add the script to the pipe up there same when you did before add component scripts ok click play and now each time you touch that pipe you respawn it kills you great now we need to do the same thing of course for pipe down except we've handled a lot of the code already and pipe up so this is going to be a little bit easier we just need to repeat a few of those same steps we used before so we've created a reference to our character up there and we're gonna tell unity where the character is we've done this before find objects of type character meaning it's looking for an object with that character script attached ok and then in the void update remember the method that is repeatedly called each time the game refreshes we're saying that if the character is a certain distance away from the pipe again and then we're just going to destroy the game object no need to be spawn it because it's being respond at the exact same time that the the upwards one is being created and then we can just copy that on collision enter script from the other place from the other script and there you go now creating a new folder called prefabs make sure you add that to the pipe down sprite by the way a prefab is a ready-made game object with all your attributes and scripts attached so I've deleted them from the scene and just put them into my prefabs folder there now you can see here in the pipe up script in the inspector I have that option to add my public game object and so I'm putting in there that pipe down so that means that the script will know where pipe down is and it will be able to find it and instantiate it and because doing it from the prefab that means that it's going to have all those important attributes attached as you can see it work there nicely so now I'm just gonna add in one more method called build level and this is where we're going to instantiate the first batch of pipes because you need to make sure we've got a good few pipes up there ahead so that they we're not gonna have spaces so that they'll fill the screen and if you use the same numbers that I did in the same sprites then you can just copy this fruit pause the screen and copy out but play around with way you want your pipes would be you can add random positions to start with if you want in the interest of good housekeeping would also be a good idea to destroy the pipes every time the player dies you can add that in later on but now when we press play because that's in the character script they're all going to be instantiated of course we need to add those public objects from the prefabs very important you as from the prefab not from the scene now when we click play those ones I've instantiate it in my build level script which is called at the start of the game and also when the character dies we'll be right here so for mine they're going to be in the same position every time and then as we go for they're going to start disappearing and reappearing in front of us and they go it works nicely so that's my flappy bird game it's so much fun I could do this for the days you know I don't want it don't want it to end really yeah there we go we've run through that all quite quickly I realize but you know slow it down when you need to and hopefully you've got to grasp the concepts if the only thing you don't understand then click the link in the description down below and I go through in a bit more detail and explain things like prefabs what they are they're just a really useful way of creating a game object with all the attributes already attached and also it means if you change an attribute on one it'll change those qualities across every instance of that object throughout your games you have to make lots of changes people said last time they want to see how you actually create an apk how you make this into a game that you can share let's do that you just need to go into build settings then you choose Android as your platform and then you choose switch platform then if you click player settings then I'll open up in the inspector a whole bunch of options where you can say things like them the package name the version the Android version you're targeting etc and then you just hit build and run and it will build it and one more thing you need to do before hit building run is to save your scene that's the level and then add that to scenes in build so there you go that's one way you can create a nearly fully working flappy bird game in just 10 minutes really was pretty quick and simple there's not much more you need to do to make that fully functional and release it on the store and who knows start getting some downloads take the Fallas video useful and interesting guys if you did then please leave a like please share it around comment down below subscribe to the channel all those things help us out greatly like I say check out the links in the description down below for more information and whilst you there why not look around to check out Angela thority comm if we are your source for all things Android