"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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1
vote
3answers
318 views

Why cap game loop delta-time?

I was reading some game's source code on Github and saw this game loop implementation for the first time: var lastTime = 0; var maxTime = 1/30; /** * @param {DOMHighResTimeStamp} curTime ...
0
votes
1answer
212 views

Map scrolling around the world

I am developing an TBS (turn based strategy) game. I have created a simple canvas renderer to render hexagonial map. I already implemented scrolling on the map. My current problem is that I want to ...
0
votes
0answers
27 views

Crafty Bind “createView” to viewport - TiledMapBuilder

Is there any way to bind the createView function to the player entity? For Example: I am moving forward and the map is automatically loaded. I call the Map with: Crafty.e("2D, DOM, ...
8
votes
4answers
1k views

Is a multiplayer game in JavaScript a bad idea?

What are the possible downsides to using (client side) JavaScript when creating a multiplayer game? Game description: It's an MMORPG/RTS. That means players actively contribute to structures in the ...
0
votes
1answer
124 views

WebGL wrong scaling of rectangle

I'm working with this tutorial http://www.html5rocks.com/en/tutorials/webgl/webgl_transforms/ and my result is, that the rectangle moves in the direction of it's scaling values, and also scales at ...
0
votes
1answer
67 views

changing a sprite width when playing a reel using Crafty.js

can anyone help me with this : http://jsfiddle.net/B5UsC/20/ you can see that the sprite animation is not rendering correctly when the reel is in the last frame when animating Hardpunch is it ...
0
votes
0answers
39 views

changing sprite coordinate when defining a new reel in crafty.js

this is my jsfiddle : http://jsfiddle.net/B5UsC/18/ this.bind('KeyDown', function () { if (this.isDown('A')) { this.__coord[0] = 57; ...
0
votes
1answer
55 views

confusion in animating a sprite sheet using craftyjs

can anyone help me with this : http://jsfiddle.net/B5UsC/15/ you can see that the sprite animation is not rendering correctly and i am guessing that i am not using the exact width of the sprite ,i ...
0
votes
1answer
128 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 ...
1
vote
1answer
108 views

Objects don't instantiate at mouse position

I'm trying to get the player to shoot a projectile at the mouse position, however the projectile is shot in weird directions (http://gfycat.com/BothFluidHoneyeater). Here is relevant part of my ...
0
votes
1answer
130 views

animating a spritesheet using crafty.js

this is my jsfiddle : http://jsfiddle.net/seekpunk/ek6ub4u5/1/ i don't understand what i am missing it's been three days now working and trying to do the animation but i am stuck ...
1
vote
1answer
206 views

how to store game state for a multiplayer board game eg. poker

First Approach: Store the state in database and play with database queries. Could a database handle the load, as poker is quite fast paced, and I have to query/update database for each player move. ...
0
votes
4answers
214 views

How to handle a negative coordinate 2d map with a growing map size

I love this procedural generation theory and have been messing around with it. However I'm having trouble wrapping my head around how to store my map data. Usually I store my map data in a 2d array ...
3
votes
1answer
106 views

CSS Sprite position updates slow due to addition of 'px'?

I'm moving fewer than 10 position: absolute elements around the screen. An enormous amount of CPU time (profiled in Chrome as (program) i.e. native code) is used where I do the following: style.left ...
0
votes
0answers
85 views

Box2D.js b2ChainShape

I'm using box2d.js (asm.js ported) and need to create a b2ChainShape. var bodyDef = new Box2D.b2BodyDef(); var fixDef = new Box2D.b2FixtureDef(); bodyDef.set_type(Box2D.b2_staticBody); var chain = ...
2
votes
2answers
393 views

How do I translate accelerometer readings into object movement?

I am using the DeviceMotionEvent web API, which gives me a device's acceleration split up into x-, y- and z-dimensions and a time interval. Here's my attempt at moving an object on screen based on ...
-2
votes
2answers
104 views

isometric tile tiled format javascript [closed]

Okay im having a problem with drawing an isometric map exported from tiled. Here is my problem. where it should be like this Here is the code that i used to reproduce the 1st image, what's wrong ...
3
votes
3answers
934 views

How to launch a prefab at the mouse position

I want to use Instantiate(item, new Vector3(...), Quaternion.identity) to land an item at the position that was clicked. My game is using a third-person view (example). This is the code that I think ...
0
votes
0answers
89 views

Drawing a object with Box2D and HTML5 canvas on current mouse position

I'm attempting to create a air hockey type game with HTML5 canvas and JavaScript, using Box2dWeb for the physics calculation. I need a way to draw the puck at the current mouse x and y position every ...
14
votes
3answers
3k views

How to avoid movement speed stacking when multiple keys are pressed?

I've started a new game which requires no mouse, thus leaving the movement up to the keyboard. I have tried to incorporate 8 directions; up, left, right, up-right and so on. However when I press more ...
0
votes
1answer
111 views

Rotating a view of a chunked 2d tilemap

I'm working on a top-down (oblique) tile-based engine. I would like for the tiles to have a definable height in the world, with Characters being occluded by them, etc. This has led to a desire to be ...
0
votes
1answer
91 views

Continous collision happening in Unity2d

I am working on Unity2d. I have a game object called gameobject1 on screen. It holds an image (named "state"). When I drag a tree on a gameobject1 collision is happening continuosly in the same layer ...
1
vote
3answers
147 views

Calculating step length with dividing a number that returns digits after the decimal point

How can I get rounded numbers from calculations that returns digits after the decimal point? And all the numbers together will be the number that is divided from. Explanation: I am currently working ...
2
votes
1answer
65 views

Mouse input and structure in JS [closed]

I am creating a simple concept where I have a small menu to choose a tool from and then I can click and drag to build. For example, I click on the rails tool and then I can click and move the mouse ...
6
votes
2answers
3k views

Is using multiple canvas objects a good practice?

We're developing a jump and run game with HTML5 and JavaScript and have to build an own game framework for this. Here we have some difficulties and would like to ask you for some advice: We have a ...
-2
votes
1answer
514 views

Energy Bar in Unity [closed]

I want to display a debug message when the progress bar is loaded fully and I have a button "refresh", when I click this it should reload the progress bar. Here is the code I have tried: var ...
1
vote
1answer
335 views

Removing a previously rendered image on a canvas

I made a platformer using ctx.clearRect and ctx.fillRect, so each time the player moved I would just delete the previous position and draw him again. Now I'm working on importing my own art into the ...
4
votes
3answers
3k views

ImpactJS and Construct 2 [closed]

I'm interested in HTML5 game development and I found about this 2 game engines, I already know ImpactJS requires more programming experience and that Construct 2 has its own event and action system ...
5
votes
1answer
326 views

City/Nation Builder - Unlocking game elements over time

Current Git (Needs more documentation) Current working prototype to play with (Git code is after a BIG refactor) Background: I'm making a javascript text city/nation builder along the lines of A ...
0
votes
2answers
164 views

Collision detection: Swinging bat/racket and ball

I am programming a side-view tennis game, inspired by an old arcade game, using Javscript and HTML5 canvas elements. The player can move left and right and holds a racket at arms length which can be ...
0
votes
2answers
355 views

Deal Damage to Player

I have to make a simple "avalanche" game to show I know how to use the physics and creating terrain. But I actually wanted to go a little above and beyond and actually give the player health so there ...
0
votes
2answers
745 views

Health bar in unity

I have created a button as my health bar and it must decreasing after a specified time.Here is the code I have written.But the problem,this code is working in the form "Its decreasing the button ...
0
votes
1answer
6k views

How to enable/ disable GameObject

I have child object with ParticleSystem component. I want to have particles disabled until I press button. I unchecked child object to make it disabled but when I press play it enables ...
0
votes
1answer
125 views

Phaser/HTML5 - Trying to add five instances to a group and display on the screen!

just started using Phaser today after seeing Thomas Palef's lessmilk series. I completed PhotonStorm's "Make your first Phaser game" tutorial, and grabbed the skeleton, some CSS, and started to throw ...
0
votes
0answers
38 views

Calculating co-ordinates of a line/ray that's increasing in height with a known slope/radians. Height increase is also known

basically in my game I'm firing a line. The line's anchor point is at the very bottom of it, and half of its width. When I fire the line, its rotation gets set to face where we want it to go. Then, ...
0
votes
3answers
212 views

2D collisions between 2 arrays

I'm trying to do collision detection between bullets and enemies in my game. But it's very unpredictable and sometimes it works, sometimes it doesn't (bullet goes straight through without doing ...
1
vote
4answers
127 views

Check which object was activated first

How do I check which object was activated before the other? Let's say that there's door to open. To open the door you need to press firstly the second button and then the first button...but not the ...
1
vote
2answers
305 views

Bullet entry Point around Player Object

I have a player rotating by the mouse and want the bullets line up with the player's gun. Right now they simply come from the point of the player and shoot in the direction of mouse. I just need the ...
0
votes
2answers
602 views

How to show a float with no decimals [closed]

I want to show the current health and stamina of the player using GUI.Label. All is working fine however it shows the values with decimals to the millionth (example: ...
0
votes
1answer
133 views

Press multiple switches to unlock the door

I made 2 scripts, one that is a switcher and one that checks if object is switched (Switch, SwitchCheck). Switch script (it's on 2 objects that are switches and both objects have colliders with ...
2
votes
2answers
112 views

How can I manage complicated visual state over a simple model in puzzle games?

I've been encountering this design challenge making a few toys with Javascript (CreateJS, EaselJS) The scenario is that you've got some sort of puzzle game with a simple game model. For a simple ...
-1
votes
1answer
93 views

Code explanation

Can someone please explain whats going on in this code written by Paul Irish I did not understand the draw(). function draw() { var time = new Date().getTime() * 0.002; var x = Math.sin( ...
0
votes
0answers
199 views

Picking tiles in an isometric diamond map

I am rendering a isometric map with the following code: for(var x = 0; x < MAP_WIDTH; x++) { this.map[x] = []; for (var y = 0; y < MAP_HEIGHT; y++) { var screenX = ...
0
votes
2answers
455 views

Character bounces/stutters down hills

I'm using Unity3D (not 4) and I'm experiencing a bit of a problem with character movement. I'm using a cylinder as a First Person player with a child Main Camera. In this cylinder is the stock ...
0
votes
1answer
64 views

Regeneration using Time.deltaTime

I'm trying to regenerate stamina at a rate of 1 per second using Time.deltaTime, however this doesn't do anything (My 'current stamina' doesn't change at all). I've done some looking around and I have ...
0
votes
1answer
169 views

How to use setInterval and clearInterval

I have a game that I am making and cannot seem to get the setInterval and clearInterval methods to work. When I debug it in the browser console it shows that the method is still being called over and ...
0
votes
1answer
863 views

Problem with Raycasting in a 2D Game

I'm new to using unity and came across a problem when I was following a tutorial. The game is in two dimensional space, and when my player walks over a certain tile the detection never goes off. ...
1
vote
1answer
198 views

How to use sprite as font in Unity?

I've started working on my first game in Unity; It's very simple, there's a spinning block in the middle, and there are spinning blocks coming from all sides. When they hit the middle block, you lose ...
5
votes
4answers
1k views

Why do I need a local server for HTML5 game development?

I'm new to HTML5 game development. I'm trying to make something using Pixi.js, but when I tried to view it in a browser, I saw a blank page. According to the tutorial I'm following, I need to set up a ...
0
votes
1answer
105 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 ...