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34 views

Broken screen when running empty AndEngine project using LimitedFPSEngine

I am new to AndEngine and I am following the steps in this tutorial: http://android.kul.is/2013/10/android-game-development-tutorial-part-3.html. In summary, it is a simple getting-started project ...
0
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0answers
42 views

Apply impulse to ball to a fixed height Jbox2D android

I have to hit a ball to a fixed height repeatedly as shown in the following image. This game is similar to 1983 Hitit The difference is the hitting y axis will be variable. I wanted to hit the ...
0
votes
1answer
307 views

How do I handle collision response between many different types of game objects?

I am looking for a way to avoid the dreaded switch or if/else scenarios between numerous game object types when a collision takes place in a game. For example: You have a list of game objects which ...
0
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2answers
350 views

Why is mesh baking causing huge performance spikes?

A couple of seconds into the gameplay on my Android device, I see huge performance spikes caused by "Mesh.Bake Scaled Mesh PhysX CollisionData" In my game, a whole level is a parent object containing ...
0
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0answers
280 views

Cross-platform ad-hoc local mobile multiplayer

I want to implement ad-hoc cross-platform (iOS, Android, and PC) device discovery for local multiplayer, like this scenario: http://www.youtube.com/watch?v=csXYZf2vGdE Multiple players, each with ...
1
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0answers
56 views

How do you calculate the rate of rotation using the accelerometer values in Android for a particular axis?

I am developing a simple game which involves a character moving up and down only along the Y axis. Currently I am using the accelerometer readings to change the Y velocity of the character. The game ...
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0answers
93 views

How can I use a Seekbar as a brightness slider?

I am using the GLSurfaceView Renderer. I want changes to a seek bar's progress to increase the brightness of a GLSurfaceView proportionally. How do I apply a color matrix to a GLSurface view? Is ...
0
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1answer
146 views

Android AndEngine creating a body behind the sprite exactly

I am using AndEngine for Android. I created a body, but it is not behind the sprite as I wanted. Body.setTransform(Sprite.getX()/32, Sprite.getY()/32, 0); This is ...
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0answers
173 views

Android and OpenGL, single thread vs double thread

I'm trying to optimize my Android OpenGL ES 2.0 application, and I find myself being CPU bound. After googling, I've found this, which suggest to use a thread for updating objects, and a thread for ...
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2answers
70 views

How do I inline images between text in a Table?

I have a Table and a Label with wrapped text. I want to display some images in-line with the text. For example: This is an image -IMAGE_HERE-, and now some more text showing, yet, another image ...
2
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2answers
186 views

Adding touch/click event to a bitmap in android

In my android game, there is a surfaceview which has 36 bitmaps drawn on it. I want to change the bitmaps when they are touched. Is there a way implement touch or click event to the bitmaps ? Adding ...
1
vote
0answers
232 views

How can I transform a group of objects in libGDX?

I'm new in LibGDX. I created group with actors in show method and add listener (where i calculate rotation matrix) and want to rotate all actors from group with ...
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3answers
2k views

Is a separate thread for game loop compulsory for simple games?

I am new to game development. In order to learn I am recreating this game on android platform. You can observe the game-play video at the above link. It is a simple game. I have read a lot of ...
11
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2answers
2k views

How do some mobile games scale graphics so beautifully? [duplicate]

I'm working on my first Android game and have been struggling a bit with scaling. I've got 3 test devices 800x480, 1920x1080 and a 2560x1600 tablet. Some games look near perfect on all of them - many ...
1
vote
1answer
126 views

Pixel Perfect collision detection on rotated bitmaps [duplicate]

I have two bitmaps which are being drawn onto a canvas using a matrix canvas.drawBitmap(bitmap, matrix, paint); first to work out if I need to check for a collision i am using eucilidean vectors ...
10
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5answers
2k views

2D collision detection

Let's assume I'm using this character. How would you implement collision detection for it? Using a bounding box doesn't seem to be a good approximation, because the bird's shape is nowhere near a ...
0
votes
1answer
161 views

How to accurately count 1 second within my logic update?

I have the following method: long time = system.nanoTime(); public void count(){ if (System.nanoTime() > (time+1000000000)){ //Output something or perform action here ...
0
votes
1answer
135 views

Is this the correct way to detect ray-sphere intersection?

I have this java function that should return a true or false for any sphere passed to it if they intersect. However it seems to end being true a lot of the time when it shouldn't and false sometimes ...
1
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1answer
148 views

What are the advantage/disadvantage of publishing a game as Chrome App over Android app?

I have a 2D game on my mind that I wanted to develop. Though I am quite familiar with using Javascript, CSS3 and aware of HTML5's canvas, I am also aware of Chrome App and its ability to work offline. ...
0
votes
1answer
47 views

Actors (Label) not being drawn to stage [closed]

I have a weird issue that when I try to draw a Stage with only an Actor, a Label to be more precise, added to it and nothing seems to be getting drawn. This is how my setup goes: I have a Sprite ...
0
votes
1answer
68 views

Changes to myApp.js files are reverted back to normal when the project is build - Cocos2dx

I am trying to do some changes to my myApp.js file of coco2dx project for android in eclipse but I am not able to do it. I am actually trying to change the default background image of my app. But ...
0
votes
1answer
69 views

Run menu in gameloop or as activity?

Currently I am running my menu (with buttons "new game" and "choose level") as an xml view of an activity, that then starts my gameactivity with custom view run on a gameloop. But Im starting to see ...
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0answers
34 views

Register Modifier to Parent Entity

As far as I know, with Andengine if you register a modifier to a parent, all the children will also be affected by the modifier. If I am wrong please let me know. I'm currently working on a game and I ...
0
votes
1answer
115 views

Mismatch cordinate system of unity and android

I am new to unity3d, Right now i am adding a cube as game object with coordinate 0,0,0 But when i run it on android device Iam facing 2 problem a) Coordinate system of unity3d are different from ...
0
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0answers
58 views

Unity3d: Lines in Android build

I have a directional light pointing at the 3d objects. For some reasons, when I build to Android, the lighting produces multiple horizontal lines. It does not happen in other builds such as the ...
0
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2answers
125 views

Box2d world width and height ratio with screen width and height

I have view, for example GameView which extends SurfaceView . I have integrated Box2D physics in GameView. I have two widths , GameView width, height and Box2D physics world width ,height. I need to ...
0
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1answer
59 views

Android Jump&Run - Random map generation [closed]

I'm pretty new to game development but I work on an android app. It's a 2D Jump and Run game. I do it in Eclipse and the map is readed out of a txt file right now. But I want to do a Jump and run ...
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vote
1answer
166 views

Change game from portrait to landscape dynamically

I have multiple classes that implement Screen. I want to, say, have the Main Menu screen portrait, then the Play Screen landscape. Is there anyway of changing the orientation dynamically? I thought ...
1
vote
1answer
220 views

How should I implement a Game Over menu in Android?

By Game Over menu, I mean a menu displayed when you die, with an option to play again. I have two approaches in mind: Use OpenGL Have some button textures ready. When the character dies, draw ...
0
votes
2answers
3k views

How do I make a background fill the whole screen in Libgdx?

I'm using this code to set a 800x420 image to be full screen: public void show() { float w = Gdx.graphics.getWidth(); float h = Gdx.graphics.getHeight(); camera = new ...
5
votes
0answers
2k 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
220 views

Andengine Rotate Wheel with fast acceleration

I have a Wheel sprite and i am rotating it using Physics RevoluteJointDef. Its rotating. But problem is how i can make wheel to start moving fast. It took the speed after sometime like real. // ...
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0answers
138 views

glsl fragment shader work diffrently on different devices

i'm making a 2d android game where i have a mechanics that allow the player to move the camera away from the main character, and to not allow him to explore the hole world, a have create a Fog shader, ...
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2answers
146 views

Circular dependency when creating entities

I have the following problem: I have a a class called Stage, that keeps an list of entities, which it iterates over every update loop, and updates them. One of these entities might be a weapon (PEW ...
0
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0answers
183 views

Spin wheel with gesture in Andengine

I want to implement Fortune wheel in Andengine. The wheel would start spinning based on the speed of a finger fling. Then it would stop slowly like real Fortune wheel. What I am able to do now is to ...
2
votes
2answers
194 views

How can I create delays for sprite animations that work correctly when the application is killed and restored?

Please see my original question here: How should I use system time to compute delay times without stutters? In summary, I am attempting to to introduce a delay (say of 5 seconds or so) before a ...
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0answers
243 views

Using Parcelable in Android to save an object to a Bundle

I'm attempting to ascertain the best method of saving the state of everything in my game for those cases when the app is sent to the background, so, for instance.... • User has pressed the 'Home' key ...
1
vote
5answers
150 views

How to reduce a rectangle without problems?

I'm developing an asteroids' game and I'm needing to reduce the rectangle of the spacecraft because when I use the method intersect() of Rect class to detect a collision with an asteroid they are far. ...
0
votes
2answers
231 views

Should I use a engine when building a snake game? [closed]

I'm new to game development, and want to build a snake game for Android (Maybe also iOS). I've made several apps for Android and have a pretty good experience with Java. The question is, do I need to ...
0
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3answers
636 views

LibGDX Android version

I am trying to use the LibGDX UI Project creator to create LibGDX projects, but it doesn't allow me to choose the Andorid version for the project. This is a problem for some android features. For ...
1
vote
1answer
295 views

Viewport Pixels trouble - Intel XDK

I'm creating a game in Intel XDK, and using their API to get the viewport width and height. These are coming back at 1122 pixels and 746 pixels, respectively. When adding my text at 150 pixels down ...
-2
votes
1answer
170 views

How should I start with Android development? I am basically a PHP HTML JAVASCRIPT developer [closed]

I am a PHP developer wanting to learn Android game programming. I tried java with ADT and android SDK, but I found Java confusing because of its complex Object-Oriented structure. I've heard we can ...
0
votes
1answer
307 views

How do I implement swipe-to-throw in Andengine?

I have a ball sprite and I apply physics to it when the user swipes on it. I'd like the ball to start moving in the direction of the swipe, similarly to how Paper Toss works. How can I do this?
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0answers
82 views

How can I know when a scene is fully-created in Andengine?

I am using a scene manager like this. How can I know if a scene is fully created and visible on the screen, as it seems that the GameScene listens for touch events while the loading scene is still ...
0
votes
1answer
131 views

Making a sprite jump at a particular angle android

I am making a game in android Java, and I am kind of new in game programming. Please help me out. I have a sprite that is moving horizontally across the screen. I want him to jump when the use ...
0
votes
1answer
97 views

What's the best way to time a character AI movement on android/java?

I'm creating an android game and I'm trying to figure out the best way to time a character position change, something like this: public void move() { //this.posX += 5; this.posY += 5; if ...
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0answers
142 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
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1answer
122 views

What image format supports transparency in Android?

I want to show an apple on screen but the image has a white background and it doesn't blend with the background of a tree. Is there any image format in which only the red apple is displayed?
0
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0answers
49 views

Trying to use Sprite Batching with GL_COLOR_ARRAY in OpenGl ES 1.0/1.1

I'm trying to create a sprite batcher that uses GL10.GL_COLOR_ARRAY using OpenGl ES 1.0/1.1 on Android. I found two different sources that seem like they would work, they both have statements that ...
0
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1answer
504 views

How can I delete an enemy's bitmap from a canvas?

I'm learning to create an Android shooter game where I'll have multiple enemies. I must control the position on the screen and be able to delete each of then (via, for example, a die() function). ...