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

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0
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1answer
32 views

android canvas rope swing

I'm creating the code, where a player swinging on a rope for the moment I got this double angle = Math.atan2(player_y - center_y, player_x - center_x) - Math.atan2(end_y - center_y, end_x - ...
1
vote
0answers
8 views

Donut-shaped / inverse mask in Phaser

I am trying to get a donut-shaped mask in Phaser (essentially the inverse of a regular mask). The mask shape is dynamic so it needs to be a Phaser.Graphics polygon object. Desired result: The blue ...
0
votes
1answer
382 views

Creating looping canvas animation (slot machine with reels)

I have a small assignment to create something like slot machine with spinning pictures. I have to use HTML5 Canvas. I would like to hear some opinions how this can be made simply and performantly. ...
3
votes
1answer
4k views

HTML5 - Dynamic canvas grid for scrolling a big map

I've been working on different scrolling algorithms for my JS-based game. My main problem is that I need to draw a huge map and also have it scroll smoothly. I've made a few attempts and while they're ...
0
votes
1answer
244 views

Game sprite far too small

So I started writing an Android 2D game. I've come to the point where I want to display my character image on the screen. I read that most sprites have a resolution of 16*16, or more. So I created an ...
0
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0answers
15 views

UV texture mapping with perspective correction works for 50%

So, I've been trying to get the UV texture mapping down with perspective correction. The triangle rasterization seems to work. The interpolation seems to work too. It's just the perspective ...
1
vote
1answer
35 views

Tiled - move all tiles

I'm making a map in Tiled. I quickly ran out of room in the north of my map and would like to "shift" the tiles down. I'd prefer not to have to redo each of the tile layers. Is this possible? This ...
0
votes
1answer
35 views

Why can't CSS Sprites handle vectors?

Almost all the documentation available either says that "sprites are bitmaps" or that "css sprites must be bitmaps". Is there a specific reason for this? Is it, in fact possible to create a css sprite ...
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0answers
34 views

How to draw my android Hexagons in a grid?

I am trying to create a hexagon grid using the Android ’Canvas’ package. I have a working ’Hexagon’ class that when used in a view will draw a single hexagon on screen. The problem is that I need many ...
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0answers
34 views

Javascript 2D top down handling player direction graphics

In my top down game I can move the character around and the character will even face the direction he is moving however there is some weird behavior I'm having when you hold down one direction and ...
3
votes
1answer
176 views

Roguelike 2D Collision Detection

I'm just a normal guy trying to do some basic collision detection but I suck at it. I either get stuck in a wall or I go in reverse in the wrong direction trying to update the player position to a non ...
-1
votes
1answer
59 views

Adding obstacles & collision to canvas game

I am trying to add some obstacles to the canvas game that I've got but something seems to be wrong and I can't seem to put my finger on it. I just want some simple walls here and there to make the ...
0
votes
1answer
65 views

svg spaceship game movement 2d

I've been searching for a way to make an svg box move to all directions using js. I have seen many tutorials on how to do it grid like, but I want it so have a square that can turn, move forward, ...
2
votes
2answers
5k views

Android: Improving surfaceView?

I'm using Surfaceview in my Android app. I have two threads, one for UI and another for rendering and updading the UI. I am limiting my frames per second to 30 fps and have employed frame-skipping ...
0
votes
0answers
78 views

2.5D platform Android Game

I am a beginner to game development, so far I just made a top/down scroll shooter with canvas in Android, and I now wanto to make a 2.5D platform game like good old SNES, I am thinking of making it ...
4
votes
4answers
9k views

Huge performance difference when using drawImage with IMG vs CANVAS

I put together a couple of simple tests that render an image to a canvas. One renders from an IMG, while the other renders from an offscreen CANVAS. You can see the code and results here: ...
1
vote
0answers
77 views

Card Masking in Phaser

Good Day, I'm new to Phaser and still learning about it to. I am challenging my self to create a simple animation of a card flip somewhat realistic rather that making use of a scale. This is ...
0
votes
1answer
34 views

Rectangles clear each other when moving on canvas

I am having this problem after moving rectangles, they seem to delete one another. Most probably it is a problem with clearRect(...) method. This is the clean function I am using: clean: ...
-1
votes
2answers
596 views

How do I make a sprite blink on an HTML5 canvas?

I'm thinking of the flashing effect many games have when a character gets hit and takes damage. Something like overlaying a lighter color on visible sprite pixels for a second.
1
vote
1answer
210 views

Cocos2D-JS Windows App in fullscreen mode (Win32)

I've been looking for a way to make my Cocos2D-JS app go into fullscreen mode, but there doesn't seem to be much documentation on Cocos2D-JS (or Cocos2D-x-js as some seem to call it.) This app is to ...
0
votes
0answers
17 views

CocoonJS draws shadow around tiles

I am using CocoonJS launcher on iOS for a simple tiled game. Calling canvas drawImage for tiles adds a shadow or ghost border around tiles. See this screenshot: ...
4
votes
2answers
979 views

HTML5 game fps render lag

I am currently creating a flappyBird-like HTML5 game using Proccessing.js You can see current work here: http://files.tips4design.com/flappySlothRelease/ The problem is that even though the FPS is ...
12
votes
7answers
9k views

To canvas, or not to canvas, when building browser-based games?

Background: I have extensive development background, but the last time I coded a game was many years ago. My Javascript skills are quite limited, and I intend to improve them by building a simple game ...
0
votes
0answers
49 views

possible way to bring canvas 2d animation in canvas webgl context

when added 2d animation canvas in 3d webgl canvas as texture, 2d animation and 3d animation both stopped working. Any reference for this.
2
votes
1answer
139 views

How to implement user friendly screen panning on 3D HTML canvas for RTS game

How can I get RTS map panning like how it was done in C&C red alert (with the mouse at the edge of the screen moves the screen in that direction) with a Babylon.js RTS game in the html canvas? ...
0
votes
0answers
69 views

Collision detection in JavaScript Canvas game - Issue with 'if' statements [duplicate]

I am currently developing a simple browser-based game and seem to be on the cusp of collision detection that doesn't just return the player to where they were before, but actually will slide them ...
2
votes
1answer
193 views

How can I create 2D, sprite-based reflections in HTML5 Canvas?

I'm trying to create simple reflections in a 2D, sprite-based game using HTML5. I'm looking to recreate an effect like the one you'd often see in GBA games, such as Pokemon Emerald and Mother 3: ...
0
votes
1answer
368 views

Rotate arrow on canvas

I need to draw a flow dynamically based on some user choices. In that flow I want to draw the choices (blue circles with number) and the directions of that choices (line and arrow). For example: node ...
10
votes
5answers
5k 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
0answers
28 views

Reverting 2d canvas?

I'm making a multiplayer game which involves drawing lines. It's based this game: http://curvefever.com/sites/default/files/resize/remote/ef86488088c618df13b34f8b87aafd4e-1107x808.jpg. The game is ...
3
votes
1answer
694 views

Why would it be faster to render using multiple canvas elements?

This video suggests that rendering using multiple canvas elements helps performance. How does this work? The idea was to use one for the player, one for the enemies, another for the background, ...
1
vote
1answer
378 views

What is the difference between a Facebook Canvas and Facebook Web project?

I am making a game on cocos2d-JS for Facebook. What is the difference between Facebook Canvas & Facebook Web project. From what I can tell, Facebook Canvas ask for the secure url and Web ask for ...
3
votes
3answers
965 views

Procedurally Generated Top View 2D RPG Map Generation

Procedural generation is a fascinating concept and is gaining popularity in the gaming industry. The thought of playing a game that has new content every-time the game is played is very exciting to ...
0
votes
1answer
97 views

Set a different animation rate for moving player NOT using a sprite

I am trying to start making a simple game using HTML5 with a canvas and some JS. I have a player whose movement I am comfortable with, but the rate at which the player animates when it moves is too ...
0
votes
0answers
59 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 ...
1
vote
0answers
157 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 ...
0
votes
2answers
116 views

How to access bottom canvas layer in HTML?

I have such html: <div id="main_window"> <canvas id="canvas_hex_logic" width="200" height="100"></canvas> <canvas id="canvas_ground" width="200" height="100"></canvas> ...
0
votes
1answer
83 views

Initial force to achieve orbital velocity

I'm attempting to get asteroid to orbit a black hole that is asserting gravity. Some parts currently work, like the black hole asserting gravity, attracting asteroids in and destroying them. And ...
1
vote
0answers
200 views

Simple track method for 2D car game? [closed]

I'm a new programmer and I am trying to make a 2D car game on an html5 canvas with javascript and JQuery. I have got the basic car motion down, check it out here: ...
1
vote
2answers
224 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 ...
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 ...
21
votes
5answers
4k views

Should actors in a game be responsible for drawing themselves?

I am very new to game development, but not to programming. I am (again) playing around with a Pong type game using JavaScript's canvas element. I have created a Paddle object which has the following ...
1
vote
2answers
86 views

Offset during zooming to keep object within boundries

I have a simple zoom feature which lets the user zoom in and out. I'm having an issue how ever when i zoom out the object gets smaller to the point that the boundaries become broken. The idea is the ...
4
votes
1answer
370 views

How can I full-screen a Facebook canvas game?

Is there any way to allow the user to click a button on a Facebook canvas app and allow the app to go full-screen? If it's possible, is it permitted by Facebook?
0
votes
1answer
645 views

Android Canvas 2D Game: Supporting multiple screen sizes/resolutions [duplicate]

I'm planning to develop a 2D game for android devices by using simple Canvas Surfaces (I know that OpenGL might be more efficient - but Canvas should definitely be enough for my type of game). I'm ...
1
vote
1answer
219 views

How do I procedurally create a directional light cone with an HTML canvas?

To create a directional light effect, I want to draw this kind of transparency mask on an HTML canvas (using context2d): I also want to be able to generate such a mask dynamically. I've tried using ...
0
votes
1answer
218 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
4answers
223 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 ...
0
votes
0answers
92 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
1answer
8k 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 ...