"JavaScript (sometimes abbreviated JS) is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles." From Wikipedia. ...

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0
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2answers
2k views

Moving a sprite towards an x and y coordinate

Given a sprite with an x and y coordinate, how would I move it toward another sprite with an x and y coordinate? I've already made it face towards the other sprite, and I've made it move towards the ...
-1
votes
1answer
75 views

Isometric Error: decrement iteration removes tiles [closed]

I am new to isometric and game programming in general. Just cannot figure out how to iterate the grid from behind. I want to do it so that the tiles overlap properly. My grid starts at [0][0] which ...
0
votes
1answer
1k views

Simple javascript HTML5 canvas start menu

I'm currently looking for a simple and basic start screen for a game using javascript, so basically its the first function that is called and then press play which then goes into the game. Looked ...
-1
votes
2answers
316 views

Compare Mouse X,Y with Grid X,Y to find the closest grid position [closed]

EDIT: From two very good answers I have decided to use isometric projection instead of my silly grid of cordinates. I am doing a game entirely in canvas, and I find it quite troublesome right now. I ...
2
votes
1answer
230 views

Optimising out tiles outside of viewport

I am playing around with the HTML5 canvas and have begun implementing a tile engine. However, it's currently very inefficient: I have a 100x100 2D array and my code loops through the whole thing ...
0
votes
2answers
200 views

How can I get a property of an entity without having to call getEntityByType every time?

I'm trying to get an entity (a bullet, a grenade, and an explosive) from my player. Specifically, I want the shootingRate of my bullet (how frequently it can be fired). How can I do this without ...
8
votes
3answers
273 views

Y and X - Am I doing it wrong?

I sometimes run into small issues when doing my JavaScript projects. That is because most build in functions of JavaScript run X,Y if positions are needed. (In that order). But when I build a 2D ...
1
vote
2answers
544 views

Dynamic Textures

I am pretty new to this 3D designing and animating, and as an indie developer I need to do everything on my own I have created this simple box character And I want to texture it, have looked around ...
0
votes
2answers
445 views

Increasing speed of circle over time as linear with Box2d

Assume that there is a circle and it can be moved by using keyboard arrows.Is required that increasing speed over time like increasing car speed. For example; max speed is 25 and time to reach max ...
3
votes
2answers
457 views

Are javascript MVC model implementations too slow for games?

I wanted to implement a game in javascript with an MVC design pattern, with each entity's state stored in a model. So for example, In an update loop we iterate over all models and apply the velocity ...
4
votes
2answers
589 views

Simulate forces on a connected chain

I'm building a 2D space game where the player uses a chain to grab on to nearby asteroids. The asteroids move along a specific path with a constant velocity. The chain has a maximum length L and ...
6
votes
3answers
390 views

How can I change the acceleration of an object to arrive at a particular time?

I'm trying to write some code to change an acceleration factor so a ball will arrive at a destination in a desired time. The problem is I don't know time (t) but I do know I want it to arrive at (t - ...
2
votes
2answers
1k views

Receiving keyboard events on a canvas in Javascript

I need to receive keyboard events in a canvas element. Click events are received but key presses aren't. Here is my code which doesn't handle key events: var canvasElm = $('canvas'); ...
2
votes
2answers
521 views

How to make a Unity3d program/plugin and publish it on Asset Store?

I want to make a plugin for Unity3d, like TornadoTwins's FPS Control. How can I do that? I already have Visual Studio 2010 installed.
1
vote
2answers
299 views

Mega Man screen scrolling in JavaScript [duplicate]

I'm trying to create screen transitions similar to those found in Mega Man or Legend of Zelda (i.e. the active elements of the first screen are stopped as the screen scrolls in the direction of the ...
-1
votes
2answers
89 views

When I create more than one boundary, every one but the most recent breaks [closed]

So basically what I have is a function called createBoxBoundary, which, when the player position is within certain limits, sets boundary variables to true. Pretty straightforward. However, when I call ...
5
votes
2answers
784 views

Get timing correct with client side prediction

I believe I've got my head round CSP after reading Gabriel Gambetta's blog, Valve article and buildnewgames.com but having an issue understanding the time execution of everything. So if a player ...
-1
votes
2answers
643 views

Javascript - create a new bullet instance every time a user event is triggered

Basically I have a function that I need to create an object of every time the user presses space(event listeners not shown here). function arrow(){ this.x = playerXPos + 40; this.y = ...
1
vote
1answer
374 views

2D js physics engine for HTML4

Is there any engine for Javascript like box2dweb that does not use Canvas? I need to build a game that works in HTML4 browsers.
1
vote
2answers
523 views

PHP and Javascript/HTML5 Collaboration [closed]

I've recently been working on a fairly complicated game. I've stored information with local storage, but that allows the player to edit it, and does not transfer from computer to computer. The two ...
8
votes
3answers
737 views

Saving roguelike game state?

I'm working on a basic roguelike using HTML5 and jQuery, and I've come across a problem. The way the game currently stands, the system only saves the game state every time the user moves between ...
1
vote
4answers
272 views

A formula for point calculation based on value A's proximity to value B

I am trying to find a formula to use for my rhythm game's scoring. Basically there is a Guide entity and a Live entity. You control the Live entity and have to match it as closely as possible to a ...
1
vote
1answer
139 views

Increase restitution (bounciness) of an object in a JavaScript formula

I'm going slightly around the houses on this one. I originally started a thread over on Stack Overflow about it but then it seemed to diverge into mathematics, with no joy from the SO community over ...
2
votes
2answers
443 views

How do I calculate consistent frame timings at 60fps?

I'm writing an HTML canvas game that uses requestAnimationFrame and therefore runs at 60fps, although this is more of a question about failing arithmetic than about JavaScript. If I measure the time ...
1
vote
1answer
595 views

PNG image as a level map for 2d game

I've been using a tilemap editor for making levels, but I was wondering if there was a way to use PNG images as the level map, as maps created in tiled editor are graphically uninteresting. ...
6
votes
3answers
921 views

Basic isometric projection in Javascript

I've been working on porting an old closed source game to Javascript with Canvas and I've come to a slight problem. Right now, to display the land, I just have a pretty basic loop that just draws the ...
1
vote
2answers
1k views

How do I generate a 2d grid-based map without screwing it up?

I'm relatively new to the mechanics of game development - catching up fast, but there are still some things that escape me. For example: generating a fully-accessible map on a 2d grid. See the ...
2
votes
3answers
182 views

Instantiate objects that share same variable

I'm just wondering how to instantiate the same objects that all share the same variables, except their positions. I'm basically working on the scene of my HTML5 game, and I've build a streetlamp post ...
2
votes
2answers
394 views

Best way to store NPCs, Monsters, Shops, etc for JavaScript game? [closed]

OK, let's say I have a JavaScript game (preferably on jQuery framework) and its using HTML5 Canvas. What would be your way of storing data to map out shops, monsters, and NPCs? I was thinking maybe ...
0
votes
1answer
341 views

Saving Scores Using Cookies

I've recently created a small galiga like game recently using JavaScript and HTML5. I've run into a bit of trouble saving cookies, the cookie saves, but then resets itself when the page is refreshed, ...
-2
votes
1answer
80 views

Why do I get “Undefined” only on the “Vertical” Grid? [closed]

Problem: When I get to the end of the Grid it gives me an Error :-/ The X axis is fine, the problems occur then I move "over the end" of TOP and BOTTOM. This code works: if(new_data[1] == ...
5
votes
1answer
721 views

box2d with lines

I have a very simple platform game builder and I've specified the ceilings, walls and floor as line segments. A line has a winding, or normal; you can determine the direction that a line should be ...
5
votes
1answer
881 views

Canvas animation drops to 30fps every 3-4 seconds

Ok! I solved the problem. Chapter One - Multiple Canvases I started to make pong utilizing requestAnimationFrame and I noticed that the ball was stuttering and slowing down every 3-4 seconds. So I ...
2
votes
2answers
207 views

Approaches for storing grid-like information

I am drawing this simple grid on my NodeJS server: var grid = []; for(var x = 0; x < 20; x++){ grid[x] = []; for(var y = 0; y < 20; y++){ grid[x][y] = 0; } } ...
1
vote
2answers
1k views

How to make an infinite map

I was wondering if someone could explain to me how to implement a seemingly dynamic infinite map like the one at http://wordsquared.com/ My main issue is really generating new tiles in any direction ...
2
votes
1answer
314 views

mat3x4 in webGL shaders

I am porting the IQM bone animation format to Javascript and have run into a problem... The vertex shader is failing to compile and the only error message I get out is 'mat3x4' : syntax error on the ...
0
votes
1answer
320 views

Player movement behind objects

I was playing around on RPG JS and Browser Quest, and the player, when moving, can give the effect of walking behind the trees or houses etc, so the player effectively disappears while it is "behind" ...
-5
votes
2answers
576 views

A* mouse movement javascript top-down game

Im trying to implement a* path finding for my character movement in my game. The game is written in javaScript along with jQuery in a canvas. I have read up on A* so i believe i understand what it ...
-2
votes
1answer
4k views

How to make background to stage in kineticjs

var stage = new Kinetic.Stage({ container: 'container', width: 490, height: 300, }); var layer = new Kinetic.Layer(); I want to make a default image to a stage to be the ...
-4
votes
2answers
207 views

enemy shooting towards FPS [closed]

WELL first of all I want you to see my game (its deployed on heroku cloud) : http://still-escarpment-3701.herokuapp.com (It takes almost 10 sec to load so please wait for couple of sec) I have ...
-1
votes
1answer
227 views

problem with bullets shooting in FPS game

Please check out my game here: http://still-escarpment-3701.herokuapp.com The problem is with shooting. The bullets keep on moving with the First person controller instead of moving from the same ...
1
vote
0answers
478 views

shader-based particle systems [on hold]

I have a classic particle system where each particle is represented by a quad and, each time step, I move each particle. My target is webGL which means I don't have instancing, attribute divisors nor ...
0
votes
1answer
907 views

Unity - Code is fine in the editor, has error on android

Right. Im running into some weird issue with android unity. I have this bit of code function OnTriggerStay (other : Collider) { if(die.GetComponent(DieScript).sideUp ==6 ...
10
votes
0answers
910 views

How to create 2D shadows [duplicate]

I'd like to create lights and shadows in a 2D environment, like in the image below: I did several searches but got no results. Do you have any hint?
5
votes
3answers
1k views

How should I implement parallax scrolling with pan and zoom in HTML5?

I'm writing a planetary motion simulator with the HTML5 canvas element and I want to put one or more layers of stars in the background. The user can click and drag the screen to navigate around the ...
0
votes
1answer
542 views

Am I doing this node.js game loop wrong?

I have 2 arrays of JSON objects, actions and game objects. At any time a user can make a request from the client which can add an action to the actions array. I have a setInterval(function(){ }, ...
0
votes
2answers
65 views

In an asynchronous server environment where player input and timed events modify data is using an in-memory array problematic?

So let's say I have a server running on node.js, and there is an array of player objects... At an interval, all of these player objects are looped and processed for events and changes that are based ...
-1
votes
1answer
368 views

Drawing polygons in 3D

I have recently been working on a 3D engine from scratch, using JavaScript and HTML5. I've successfully created lines (although slightly buggy) and points, but I can't figure out faces. My current ...
3
votes
2answers
1k views

HTML5/JS - Choppy Game Loop

I have been experimenting with HTML5/JS, trying to create a simple game when I hit a wall. My choice of game loop is too choppy to be actually of any use in a game. I'm trying for a fixed time step ...
-1
votes
2answers
353 views

Remove enemy when bullet hits enemy

For my education I have to make a basic game in HTML5 canvas. The game is a shooter game. When you can move left -> right and space is shoot. When I shoot the bullets will move up. The enemy moves ...