Game Programming - Episode 21 - Creating Sprites

Key Takeaways

hey what is up guys my name is a chero and welcome to episode 21 of game programming Okay so yesterday we took a look at actually creating this Sprite class which was really cool and um is the basis for all future Sprites for our game um now today um we're actually going to take it a bit slower because yesterday I really felt that I sort of jammed in all of this um when I originally started the series I intended to do like a couple lines of code each video I did like freaking 27 yesterday so yeah I'm going to be taking a bit bit slower bit more in depth so that you guys can really you know understand um and because you know that is really the purpose of this series So Okay so we've got this Sprite class now how do we actually create Sprites with it now the way we're going to do it is basically legitimately create a Sprite so let's open up paint. net this is our Sprite Sprite sheet.png that we created last episode oh sorry two episodes ago so episode 19 we actually created this bright shade. PNG file and and with a grid all right so if we go into a grid here we're just going to create a Sprite like right over here um because and this is just going to be temporary so what we'll do is we will I'll just like you guys can create whatever artwork you want I'm not going to spend too much time on artwork that isn't the uh purpose of the series but I'm just going to create some nice grass here um maybe a bit like that um and actually that should be probably lighter just some nice um some nice grass oops all right so that's legitimately my grass for now just go with it so we've created a grass texture right now and let's just save it how do we actually use this grass texture in Java in in our game um and the way we do that is pretty simple we actually need to create a Sprite out of it now you might be like hang on you're creating a Sprite in the Sprite class how does that work well it's very simple because the thing is Sprites for us are going to be static because they will not change will they no they won't once you define a Sprite it will stay the same so let's just go public um public static Sprite so we're creating a new Sprite object right here in the Sprite class and and we'll call it grass and we'll actually set it equal to new Sprite so we're creating a new Sprite and then we got to fill out all of these things so first of all how big is it it's 16 right that's the size it's 16x 16 pixels x and y are 0 and zero because it's in the top left corner of this grid and the Sprite sheet is actually we kind of need to create that one so for now we'll probably just type in can't really type in sheet um for this Sprite sheet we might just leave that cuz we actually need to create the Sprite sheet first so for now we're going to leave it as null all right obviously that's not a good idea but um for now we'll leave it as null because we haven't actually created the Sprite sheet yet but this line of code guys is what you really need to actually learn and the reason is um this is what will actually create our Sprite okay if we were to reference it from a different CL class we would simply type sprite. grass and that's it that would give us this texture now how does this work first of all again it creates a new static version of the a new static instance of the Sprite class now remember every instance of the Sprite class has unique variables all of these because none of them are static it has a unique size it's got a unique coordinate it's got a unique pixel array which means that when we access sprite. grass's pixels right because again we're creating a new Sprite object so it contains everything that's in this class um except for this because it's static um when we when we create that we actually go through all this process we load the appropriate texture the appropriate uh texture or or Sprite into the pixel array so that when we then access sprite. grass. pixels it refers to the appropriate pixels because this is the grass object and we've to we've told it to load at this coordinate all right so go through this make sure you know this code because that is how we will create Sprites from now on that is how we will use Sprites from now on as well and um and yeah so once again the size we've specified the size we've specified the coordinate of it if this was say whoops if this was for example exle whoops damn if this was for example over here right instead of up there we would have to go 01 and I hope you understand that because that's like zero that's the x value and Y is 1 so Y is one down so that is that is how that works all right so that's how you create a new Sprite and um tomorrow we'll actually take a look at create at actually creating the Sprite shet because at the moment null isn't acceptable um I just completely forgot that we hadn't created the Sprite shet yet so we will have to create a Sprite sheet and we'll do that uh in tomorrow's episode so I hope you enjoyed the episode guys if you did please hit the like button let me know what you what you thought in the comments and I will see you guys tomorrow with a brand new episode of game programming until then guys goodbye [Music]