"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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3
votes
1answer
754 views

Creating a frozen bubble clone [closed]

This photo illustrates the environment: http://i.imgur.com/V4wbp.png I'll shoot the cannon, it'll bounce off the wall and it's SUPPOSED to stick to the bubble. It does at pretty much every other ...
3
votes
3answers
523 views

What is better for the overall performance and feel of the game: one setInterval performing all the work, or many of them doing individual tasks?

This question is, I suppose, not limited to Javascript, but it is the language I use to create my game, so I'll use it as an example. For now, I have structured my HTML5 game like this: var fps = ...
2
votes
3answers
5k views

Get points on a line between two points

I'm making a simple space game in JavaScript, but now I've hit a wall regarding vectors. The game view is top-down on a 2d grid. When the user clicks on the grid, the space ship will fly to that ...
2
votes
4answers
526 views

Javascript Audio solution

still has issues. Flash works but... requires flash (an issue for iOS). What do you use in Javascript for audio?
10
votes
2answers
549 views

How do I make good guy attacks only hit bad guys and vice versa?

My game has many different type of good guys and many different type of bad guys. They will all be firing projectiles at each other but I don't want any accidental collateral damage to occur for ...
6
votes
2answers
1k views

UV texture mapping with perspective correct interpolation

I am working on a software rasterizer for educational purposes and I am having issues with the texturing. The problem is, only one face of the cube gets correctly textured. The rest are stretched ...
2
votes
2answers
217 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
1answer
149 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 ...
1
vote
1answer
911 views

javascript game loop and game update design

There is a main game loop in my program, which calls game update every frame. However, to make better animation and better control, there is a need to implement a function like updateEveryNFrames(n, ...
1
vote
3answers
945 views

What Javascript game engines are out there, other than Impact? [closed]

Does anybody know of a decent (meaning preferably free ;)) alternative to Impact? Any suggestions are very much appreciated!
-1
votes
1answer
2k views

HTML Javascript Hidden Object or Photo Hunt Game

Is anyone aware of any example photo hunt/hidden object games either in HTML and Javascript or flash if necessary? I am having trouble finding one, I may be using the wrong words to search. Photo ...
7
votes
1answer
348 views

Javascript keyDown - no event approach

I'm making game in JavaScript. I have canvas for drawings and game loop. I'd like to make method readKeyboard, in game loop, to check if there is any pressed key. I don't want to attach event to ...
5
votes
3answers
1k views

Securing JavaScript / PHP game data

Followup to securing-http-data-from-a-javascript-game-to-server. I'm working on something similar, in that I have a PHP backend and a JavaScript frontend, which plays around with the HTML5 canvas ...
4
votes
5answers
1k views

How can I imitate interaction and movement in Diablo II?

I'm prototyping a simple browser-based game. It's played from a top down perspective on a 2d canvas. You left-click on a point on the map, and your character will begin walking to it. If you click ...
4
votes
3answers
449 views

How do I prevent loop that moves character to run twice? (Javascript)

I managed to make a simple loop to move my character, onmousedown I move the character diagonally to where the user clicked. It's working but my problem is that I don't know how to prevent more loops ...
3
votes
1answer
184 views

determine collision angle on a rotating body

update: new diagram and updated description I have a contact listener set up to try and determine the side that a collision happened at relative to the a bodies rotation. One way to solve this is ...
2
votes
1answer
131 views

Stop music in crafty.js

How do I stop a looping music file from playing in crafty.js? I want the music to stop playing once a gameover condition has been reached.
2
votes
2answers
2k views

Efficient collision detection - tile based HTML5/Javascript game

I'm building a basic RPG game and I'm looking at collisions/pickups etc now. It's tile based and I'm using HTML5 and Javascript. I use a 2D array to create my tilemap. I'm currently using a switch ...
2
votes
1answer
165 views

How can I clear explosions in my function?

Hi I have a function to place bombs, and a for loop that places explosions on the tiles where possible. My problem is that I can't remove the explosions after a while. I've tried everything I can ...
2
votes
2answers
1k views

Javascript Isometric draw optimization

I'm having trouble with isometric tiles drawing. At the moment I got an array with the tiles i want to draw. And it all works fine until i increase the size of the array. Since I draw ALL tiles on ...
2
votes
3answers
814 views

Is there a HTML/JS game engine/library that deals with things (HUD, menus, accounts, etc) other than the core gameplay?

I've been looking through the many HTML/Javascript game engines/libraries out there (many of which are found here https://github.com/bebraw/jswiki/wiki/Game-Engines). Most of them seem fairly ...
1
vote
0answers
540 views

shader-based particle systems [closed]

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 ...
1
vote
3answers
634 views

OOP implementation of BUFFS and Stats. Suggestion

I am developing an MMORPG server using NodeJS. I am not sure how to implement Buffs, i mean, equipped objects or used skills have effects on the Player() which has many Stats(), some of them have a ...
1
vote
2answers
935 views

Matrix rotation of a rectangle to “face” a given point in 2d

Suppose you have a rectangle centered at point (0, 0) and now I want to rotate it such that it is facing the point (100, 100), how would I do this purely with matrix math? To give some more specifics ...
0
votes
1answer
122 views

I can load new tiles but how do I load new chunks?

I have successfully been able to add new tiles and place random trees on a 2d map grid however I haven't used chunks. I just load a new tile when the player moves and save it to the map array. But I ...
0
votes
2answers
386 views

How to move an image back and forth with javascript

I currently am trying to make a baseball game and have this code here: http://jsfiddle.net/769BK/ I have the baseballX set to a decrement, and then I try increasing the value using baseballX++; but it ...
0
votes
2answers
615 views

How to move an object using X and Y coordinates in JavaScript

I am making a 2d baseball game with JavaScript and HTML5 and am trying to move an image that I have drawn with JavaScript like so: //canvas var c = document.getElementById("gameCanvas"); ...
0
votes
1answer
100 views

How would one outline an alpha transparency layer in javscript and/or php? [duplicate]

I simply want an outline/edge detection of the character/item/object that is selected or doing something. I'm seeing lots of versions of this question for different languages, but I would appreciate ...
0
votes
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 ...
0
votes
2answers
1k views

Calculating angle between two vectors to steer towards a target

I have been trying to implement a path following steering behaviour for AI in a 2D racing game. I have two vectors: futurePosition represents the predicted future position given the car's current ...
0
votes
1answer
221 views

javascript function with game engine

I have coded my main menu for the game in html/css and need the image buttons to function with the engine using JavaScript. For example: Skip (Enable) Which skips the menu when you come back to play ...
0
votes
2answers
771 views

Check if an object is facing another based on angles

I already have something that calculates the bearing angle to get one object to face another. You give it the positions and it returns the angle to get one to face the other. Now I need to figure out ...