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

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0
votes
2answers
68 views

Canvas - darken sprites rendered by drawImage

I am implementing lighting in a tile engine, and I need a way to darken tiles, based on their light level. For the ground tiles, I can clear the context to black, then set the globalAlpha and use ...
-2
votes
2answers
102 views

collision detection algorithm issue

here is the jsfiddle i am working on so far : http://jsfiddle.net/TLYZS/ if you debug the code and check the collision function you can see that the collision is working fine when the user overlap ...
0
votes
1answer
283 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 ...
0
votes
1answer
4k views

How To Scale Canvas In Android

I am writing a android game using Canvas as the way to draw everything, the problem is that when i run it on different android phones the canvas dosn't change size i tried using canvas.scale() but ...
3
votes
0answers
1k 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 ...
1
vote
0answers
55 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
265 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
24 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
25 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
74 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
39 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
47 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
128 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
58 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
105 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
20 views

Fixed print on GLCanvas surface

Having extends class of GLCanvas and I want to print some fixed texts and pictures on its surface. What is the intelligent solutions for that ? So far I have - class PhaseOne extends GLCanvas ...
0
votes
0answers
96 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) * ...
0
votes
0answers
796 views

Android Canvas problems with drawing background

I'm trying to make an android and i have got to the stage where im adding in some simple graphics and it gets drawn to the screen fine but it is drawn over the top of everything else here is the code ...