A new feature of HTML5, allowing Javascript apps to have a drawing surface in the browser.

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7
votes
3answers
3k views

Poor performance in android when running APK, runs fine in browser

I have created a small game project in HTML5 using Phaser engine (tried both 1.1.5 and 1.1.6). Then to port it to mobile platform, used Phonegap/Cordova for Windows Phone 8, Android and iOS. In my ...
0
votes
1answer
302 views

Should I render all of my HUD views to a single SurfaceView?

I'm using a SurfaceView and canvas to implement a game HUD, title screens etc., by overlaying standard Android view widgets over my SurfaceView. This works reasonably well and maintains an acceptable ...
1
vote
0answers
69 views

Shadows in html5 canvas game

I'd like to ask for reference. I met an article about how to cast shadows in games. I'm using html5 canvas (currently without webgl) with javascript for my projects. The article mentioned above is ...
1
vote
0answers
56 views

Improving performance on older Androids

I'm learning to build html5 games for mobile. I'm worried about the FPS animation on older model Android... as I use a lot of setTimeouts to update certain aspects and would like some suggestions on ...
1
vote
0answers
293 views

Drawing two orthogonal strings in 3d space in Android Canvas?

I want to draw two strings in canvas. The first string must be rotated around the Y axis, for example 45 degrees. The second string must start at the end of the first string and also it must be ...
0
votes
0answers
31 views

Drawing to canvas on a low end Android device

Recently I have noticed some of the low end Android devices have issues running my game. I've managed to get a screenshot of this bug: Once game is running, only the top left corner image will ...
0
votes
0answers
64 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 ...
0
votes
0answers
112 views

Puzzle Game on Android using canvas with matrix

I'm making a slide puzzle game on android. I have handled the gestures and tranaslate the matrix that holds the pieces succesfullly, and I have made the logic when the pieces get on the border of the ...
0
votes
0answers
49 views

How do I repeat parts of some images in 2D Array in JavaScript but not all of them?

OK, I am trying to make a game that is a little bit like SimTower but utilizing HTML5 (particularly the canvas element) and JavaScript with a little CSS. I have progressed pretty far in the past week ...
0
votes
0answers
105 views

Drawing and scrolling paths performance problem

Hi I'm doing and endless sidescroller game where the terrain looks like a tunnel which is infinite. I managed to randomly generate the tunnel using this code: protected void createPath(){ path = ...
0
votes
0answers
76 views

EaselJS SpriteSheet isn't responding to gotoAndPlay

I'm developing a Fez-based HTML5 Canvas game using EaselJS and I've found a problem, that I can't solve myself, while trying to implement SpriteSheets to the hero. The problem is that I've defined ...
0
votes
0answers
56 views

HTML5 Canvas: Get rect coords after rotation (relative to screen)

update: function(delta) { for (var i = 0; i < this.bullets.length; i++) { this.bullets[i].velocity = this.bullets[i].speed * delta; this.bullets[i].contextX += ...
0
votes
0answers
208 views

Make bitmap moviment on android canvas using timer or handler/Runnable/postDelayed

Im trying to to move enemies on a android canvas, i have to update its x and y position every x time (run enemy.move() every x time). I got 2 problems: Currently im implementing my canvas redraw ...
0
votes
0answers
64 views

What would be a good way to scroll a large html canvas (that contains little repetition if any)

What would be a good way to scroll the content of a huge html5 canvas so that the scroll is crisp and smooth, and memory consumption (and cpu load or battery consumption) is also reasonable? any ...
0
votes
0answers
178 views

detection of a circle inside a rectangle in html5 canvas

I've created this game where the player can hit space to make the circle float in certain way. the main goal of the game is let the circle enter the rectangle .I did this code to create a collision ...
0
votes
0answers
105 views

Bouncing objects against the side of the screen

I want to have certain circular objects bounce against all four sides of the screen. After searching a lot on the internet, I found the following formula: Vout = Vin - ((1+e) *dot(Vnormal, Vin) * ...