Questions tagged [andengine]

AndEngine is a free Open Source 2D OpenGL Game Engine for the Android platform.

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11
votes
4answers
5k views

Should I move the world or move the player?

I'm about to start developing a sidescrolling game where the player's goal is to travel as far as he can in the horizontal axis before touching down. Note that I do not need to ever travel back on the ...
10
votes
3answers
13k views

How to remove a box2d body when collision happens?

I’m still new to java and android programming and I am having so much trouble Removing an object when collision happens. I looked around the web and found that I should never handle removing BOX2D ...
9
votes
2answers
16k views

How do I find the angle between two vectors?

I have 3 points on my screen: ...
8
votes
3answers
1k views

How should I structure my classes to allow for multithreaded simulation?

In my game, there are plots of land with buildings (houses, resource centers). Buildings like houses have tenants, rooms, add-ons, et cetera, and there are several values that have to be simulated ...
7
votes
4answers
4k views

How do I make my rain effect look more like rain and less like snowfall?

I am making a game in that game I want a rain effect. I am little bit far from this right now. I am creating the rain effect like below: ...
7
votes
2answers
493 views

Letting the user draw a Polygon Body and Image

In my game, I want to provide the user with a drawing feature. By free hand drawing, the user creates a polygon shape. Then, in my game implementation, I have to create a body for the found vertices ...
6
votes
2answers
1k views

Whats the physics behind the doodle jump game?

I'd like to know how we can achieve the doodle jump type physics using andengine. I mean the character is not colliding with the ground blocks when he moves upwards but will collide when he came ...
6
votes
2answers
1k views

Show path of a body of where it should go after linear impulse is applied

I am making a game with Andengine and Box2D. I have a dynamic body and I apply linear impulse on the body to move it around when the user have touched the screen. Now I want to show the path where ...
6
votes
2answers
4k views

How do I support variable screen ratios using AndEngine?

When displaying a background, AndEngine produces black bars above the image on certain devices. How do I support variable screen ratios for different devices using AndEngine?
6
votes
1answer
1k views

How do I make a scrolling background out of a sequence of images?

I am new to AndEngine and trying to code a basic sidescroller game using the ParallaxLayer class from this example. (I followed the example and it works.) How ...
5
votes
1answer
2k views

How would I make an air hockey AI?

I am making an air hockey game for Android using AndEngine and its Box2D extension. How would I make an AI for an air hockey game? For it to work the AI would not only need to move its paddle side ...
5
votes
2answers
2k views

How do I place a progress bar in AndEngine?

I am developing game using AndEngine. I need to place a progress bar in my game to denote time remaining in the game. Is there a built-in method for doing this in AndEngine? My searches only turned up ...
5
votes
1answer
1k views

Smooth pixels while rotating sprite

I just started with andengine, so this maybe gonna be silly question. How to make my sprites more smooth while I rotate them? Or maybe it because this is screenshot from tablet? Thanks JohnEye it ...
5
votes
1answer
3k views

Change the shape of body dynamically

I have a problem where i have a ballon which i need to continuously inflate and defalte in update method, I have tried to used setScaleCenter but it is not giving desired result. Below is a code i am ...
5
votes
1answer
431 views

How to clip or mask entity in android/andengine?

I want to implement masking with sprite in Andengine. I want same functionality as in ios class called SKCropNode which works like an masking node! Is there any workaround like this in andengine/...
5
votes
1answer
812 views

Wheel Joint Implementation in AndEngine

I am currently developing car game in AndEngine. In which I was using revolute joint for car wheel and chassis attachment. But my friend suggest me that use wheel joint for that purpose for better ...
4
votes
2answers
7k views

Programmatically and efficiently create a graphical ripple effect?

I was developing tower of defence game for a long time. It was about to complete but I have to create ripple effect for one of the weapon that I have used. First question I want to ask is that is it ...
4
votes
3answers
10k views

Remove gravity from single body

I have multiple bodies in my game world in andengine. All the bodies affected by gravity but in that I want my specific body does not affected by the gravity. For that solution after research I found ...
4
votes
4answers
4k views

Box 2d Level Editor for AndEngine [closed]

I am getting started with Box2d in AndEngine. I need to know if there is any level editor to be used with box2d and gives output capatable with AndEngine. Is there any tool which can help me building ...
4
votes
1answer
536 views

Clock hand, how much should I rotate the hand by every frame?

I've got a virtual clock. The clock consists of the actual clock sprite, and a hand to go over it. I'm able to set how long the clock duration is. Say I set it to: 5 seconds. While the clock time is ...
4
votes
3answers
3k views

How to make Box2D bodies automatically return to a initial rotation

I have two long Box2D bodies, that can collide while moving one of them around with MouseJoint. I want them to try to hold their position and rotation. Blue body is moved using MouseJoint (yellow) ...
4
votes
2answers
4k views

Rotation angle based on touch move

I want to rotate my stick based on the movement of the touch on the screen. From my calculation I did not able to find correct angle in degree. So please provide guidance, my code snippet for that are ...
4
votes
3answers
2k views

Does AndEngine have a way to manage scenes?

Does AndEngine have a way to manage scenes (for example, main splash, menu, options, main game), and should I use a different scene per activity?
4
votes
2answers
950 views

How can I change width of sprite Dynamically?

I want to change width of sprite dynamically but i can't perform it.!! Here i want to change only my white sprite i want to use these type of facility in my game in using AndEngine I want to display ...
4
votes
1answer
2k views

AndEngine: Density, Elasticity, Friction, Gravity concepts

I am new to AndEngine. I have seen some physics examples from AndEngine Example package. I want to know the role of density, elasticity, friction and gravity while implementing physics. How they ...
4
votes
2answers
9k views

How can I save my game state so it can be resumed when my application resumes?

I've found that after resuming my game the whole engine is reloaded and application is reinitialized. I want to save engine state and in "onResume," resume the game process from where it left off. I'...
4
votes
2answers
5k views

Making color of sprite darker or lighter

Is there any way to make a sprite darker or lighter in AndEngine? I dont want to use the alpha thing. Nor I want to loose the texture/design of the image.
4
votes
1answer
371 views

Setting 4 different enemy spawn zones off screen

This is my first game, so I really appreciate all the help. I want to create four enemy spawn zones for enemies and this areas are off screen. The enemies are coming from left, right, up and down, ...
4
votes
1answer
1k views

Performance problems with many entities in AndEngine

I'm developing a rolling scene based game. I'm loading all the entities from a XML file and create them in the Loading Scene. I recently increased the game width, and, by doing so, I now have about ...
4
votes
2answers
1k views

How do I eliminate black bar artifacts in AndEngine/TMX plugin?

I used AndEngine gles1 along with the tmx plugin to generate my background maps. The image width is not fit to my virtual device, so I increased the tmx image size. Here is my code for the camera ...
4
votes
1answer
3k views

How do I implement an AutoParallax Background in AndEngine GLES1?

I'm using AndEngine GLES1. In my game, I use AnalogOnScreenControl to move a sprite and when it moves vertically, the background image also moves vertically. I want to do something like this: that is ...
4
votes
3answers
623 views

Box2d Collision problem

I'm not good with words so here's a picture to describe my problem: In my game there is this big ball which the user can move on x-axis only. Now, if the ball is falling like the red one, it's blast ...
4
votes
1answer
625 views

Spawning enemies in four different positions with a fixed trajectory in android game

This is my first android game, I appreciate all the help. I want to define 4 spawning zones starting from out of the screen (left, right, up and down). Enemies coming from this areas have a fixed ...
3
votes
3answers
1k views

Rotate Body From Corner

I want to ask that how to rotate body from corner? movableBeam.getBeamBody().setTransform(movableBeam.getBeamBody().getPosition(), angle); The above line of code ...
3
votes
2answers
2k views

“Non-additive” alpha blending in OpenGL ES 2.0, Android (AndEngine)

I have several monochromatic sprites and I render them with alpha = 0.25 (all of them the same value). I want to "paint" with them, so when they overlap, the alpha won't be added. I am not sure if I ...
3
votes
1answer
2k views

AndEngine Moving a Connected Texture and Physics Body

In AndEngine, many times we create a TextureRegion for our sprite. We can move this region around the scene but when I connect that region to a physics body I end up being able to use either one to ...
3
votes
1answer
2k views

Andengine. Put bullet to pool, when it leaves screen

i'm creating a bullet with physics body. Bullet class (extends Sprite class) has die() method, which unregister physics connector, hide sprite and put it in pool <...
3
votes
2answers
443 views

How create a respawn area in a tiled map

I'm creating a RPG game, I need to create a monster respawn area like the Pokemon games where if I walk through the long grass areas a Pokemon can appear. I already created the battle scene, I've seen ...
3
votes
2answers
3k views

Reloading Resources on Resume

I'm having a problem with my game. If I press the "Home button" the game is paused... everythings fine, but if I then go back to the game all the resources are reloaded before I can continue the game. ...
3
votes
1answer
497 views

Making a 2D TMX tile map

Should there be a specific link between the characters height as well as the tile size for the tile maps? That is if a tile is 32x32 does that mean that a character sprite has to be the same size? ...
3
votes
1answer
915 views

AndEngine - Dragging a sprite that has a path modifier registered to it

I'm looking to be able to drag a sprite that is currently on a path from a path modifier. Currently, I have sprites on a path, and I have stationary sprites that are draggable. However, simply ...
3
votes
4answers
4k views

How to move a sprite automatically using a physicsHandler in Andengine?

I use a DigitalOnScreenControl (knob with a four-directional arrow control) to move the entity and the entity which is bound to a ...
3
votes
1answer
1k views

How to rotate a sprite using multi-touch with AndEngine?

I am new to Android game development. I am using AndEngine GLES-2. I have created a box with a sprite. This box is now draggable by using the code below. It works fine. But I want multi-touch on this:...
3
votes
1answer
1k views

How to load data for specific level at runtime?

I'm trying to create a game with many levels loaded from XML files. In my game I have many objects in each level. At present my game contains 20 levels, and I load all the textures at once on startup....
3
votes
2answers
4k views

How do I set a touch listener in a child scene in AndEngine?

In my game, I want to implement touch listener for my child scene objects. Basically I tried all the possible way to implement this that I have usually done for my normal scenes, but those methods do ...
3
votes
1answer
143 views

Sounds make Andengine Scene junky

I have a GameScene which has a character (animated sprite), AutoParallaxBackground background with quite large textures and no ...
3
votes
1answer
821 views

AndEngine- OnAreaTouched

In my AndEngine-based game there are a few sprites on the scene. One sprite acts as a surface and the rest of them are placed on top of this surface. I want to take unique actions whenever any of the ...
3
votes
2answers
1k views

GLES2-AnchorCenter branch has no org.andengine.util.color.Color

I am porting my game from GLES2 to GLES2-AnchorCenter branch. I am using ...
3
votes
1answer
450 views

Knob in DigitalOnScreenControl not moving. Why?

I have set up a DigitalOnScreenControl in my game but the knob does not move. The base and the knob are drawn on the screen but the latter doesn't move as per the ...
3
votes
2answers
2k views

Detect multitouch (two fingers touch) on a sprite to apply pinch zoom behaviour

I am using andengine, want to move, zoom and rotate multiple sprites individually on a scene. I have achieved "move" but for pinch zoom i am unable to get the event to two fingers' touch. Below is the ...

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