The first variable ( is_jumping) is set to True because I'm spawing the hero in the sky and need it to fall immediately to the ground, as if it were in mid-jump.
In this case, the hero sprite can either be falling or not falling, and it can be jumping or not jumping. In programming, this is a special data type indicating that a variable is either "on" or "off". These new values are called Boolean values, which is a term (named after mathematician George Boole) meaning either true or false. In the following code, the lines above the comment are for context, so just add the final two lines: One to bring the player back down to the groundĪdd these variables to your Player class.One to track whether your player is jumping or not, determined by whether or not your player sprite is standing on solid ground.You must add two new variables to your Player class: Once the player sprite is jumping, then gravity is applied to the player sprite again, pulling it back down to the nearest object. First, you must establish variables for the player sprite so that Python can track whether or not the sprite is jumping. But once you hit the peak of your jump, gravity kicks in again and pulls you back down to earth. For a few moments, you jump up instead of falling down, the way gravity is pulling you. In the previous article in this series, you simulated gravity, but now you need to give your player a way to fight against gravity by jumping.Ī jump is a temporary reprieve from gravity. * an object where to store game global data The boilerplate also provides a bunch of default code, but first let's have a look at our js/game.js skeleton: /* game namespace */ To finish, let's save our new map as "area01" under the "/data/map/" folder (the Grunt task for building the resources.js file will check only this specific location for maps), and we are done with the first step!įirst of all, and after unzipping the tutorial assets into the boilerplate directory structure, you should have something like this: Here's what my level looked like when I finished it :įinally, let's define a background color for our level, by using the color picker tool (Map/Map Properties), and just specify any color you prefer. I named them logically "background" and "foreground", but you can put whatever you want.
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Feel free to use your imagination and do whatever you want. Be sure to configure the tileset spacing and margin to zero in tiled.įor the beauty of it, we will create two layers - one background layer, and one foreground layer. Then let's add our tileset using Map/New Tileset. We do recommend the Base64 encoding, since it produces a smaller file, but it's really up to you. In my example I'll define a 40x15 level, so we can play with scrolling background later.Īlso, as melonJS supports only uncompressed tilemaps, please be sure that your settings are correct. We also assume here, that you are already familiar with Tiled if you need more help with the tool, you can check the Tiled homepage and wiki for further help.įirst let's open Tiled and create a new map : for this tutorial we will we use a 640x480 canvas, and since we have 32x32 tiles, we must specify at least 20 and 15 for the map size.
noSoapRadionoSoapRadio for the in game musicįeel free to modify whatever you want.SpicyPixel.NET for the GfxLib-Fuzed assets for the GfxLib-Fuzed assets.Though this method is not recommended, since as long as you have the option enabled, you're adding security vulnerabilities to your environmnet.Ī second and easier option is to use a local web server, as for example detailed in the melonJS boilerplate README, by using the grunt serve tool, and that will allow you to test your game in your browser using the url.
This must be done in order to test any local content, else the browser will complain when trying to load assets through XHR. With Chrome, you need to use the "-disable-web-security" parameter or better "-allow-file-access-from-files" when launching the browser. If you just want to use the filesystem, the problem is you'll run into "cross-origin request" security errors. The melonJS documentation for more details.
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