Messages

1

SFML projects / Re: SFML with JavaScript, Box2D...

« on: November 10, 2015, 02:17:14 pm »

And starting with ECMAScript2015 the language is indeed getting better.

Duktape is V5 with some bits of V6... 

2

SFML projects / Re: SFML with JavaScript, Box2D...

« on: November 04, 2015, 05:46:51 pm »

It's not open source yet, but could be - if I can work out how to bring together SFML, Box2D, Duktape and the rest into one Git project.

SFGUI - maybe I should replace my crude console implementation with that for logging...

3

SFML projects / Re: SFML with JavaScript, Box2D...

« on: November 04, 2015, 02:16:27 pm »

I used duktape (duktape.org) to provide the embedded JavaScript. I originally used Lua but switched to duktape (JavaScript) as it's more C/C++ like. In fact, duktape is very similar to Lua in the C code.

The JavaScript behind each 'game' has at least two functions - initialise and run that get called by the engine.

I keep time consuming operations in C++ but let the JavaScript do the higher level stuff, like creation etc.

To create a box (32 x 32) with physics, you'd do something like

Code: [Select]

function initialise()
{
    box = GameObject.textureObject(1);    // create a sprite with texture index 1
    box.setOrigin(16, 16);                           // important for Box2D physics
    box.setPosition(100, 100);                    // set the position
    Physics.createDynamicBox(box, { density: 1, friction: 0.6 });
}


4

SFML projects / Re: Screenshot Thread

« on: November 04, 2015, 01:43:44 pm »

A screenshot of my SFML+JavaScript+Box2D engine I'm working on.

5

SFML projects / SFML with JavaScript, Box2D...

« on: November 04, 2015, 01:40:32 pm »

I've been poking around GameMaker Studio, Construct 2 and Clickteam Fusion 2.5 and started wondering how hard it would be to make a 2d game engine.

My reason for doing this was all of the above engines are fine, but they get in the way a bit, as I'd rather write code than visually program. GameMaker is unique in that it has a script language. Fusion has JavaScript for plugins.

I looked briefly at SDL but chose to use SFML instead (classes not C functions). I bolted a Lua interpreter on at first, but after reading "why everyone should learn javascript" (http://blog.monitor.us/2014/08/why-everyone-should-learn-javascript/), I thought, why not?

I got hold of duktape, a JavaScript engine and swapped out Lua. Now Lua is fine, but JavaScript is better (IMHO) as it's more C/C++ like.

I added Box2d physics and created my first couple of demos: a simple block game (http://imgur.com/a/z7IrB) and a physics demo.

So where am I going with this? Am I trying to make a game? I'm interested in Match3 type games and procedural generation... so that's why I'm doing this.

Oh yeah, and writing code like this is fun.