Java is both a popular programming language and runtime environment which allows Java programs to run unchanged on most hardware and software platforms.

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24 views

Use Slick2D for standard application instead of game

I was wondering how well Slick2D would work when used for a custom rendered GUI in a standard application? A standard application not being a game. More like a text editor or 2D level editor that ...
2
votes
3answers
73 views

How can I avoid sending the full game state so often?

I'm making a real-time 2D MMORPG in Java. Currently data all surrounding NPCs' and players' data is sent so frequently that the client crashes—it can't handle the data quickly enough. I'm sending data ...
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1answer
17 views

Pausing an animation in Libgdx

How would I pause an Animation from the LibGdx animation class? I've followed tutorials that teach me how to animate a sprite sheet but none to pause it. I'm trying to make an animation play once ...
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votes
2answers
60 views

Breakout Collision Detection: Ball gets trapped inside block

I'm writing a breakout clone where blocks to hit can be of various sizes and the projectile can move at different speeds, and I seem to be having some trouble getting the collision detection perfectly ...
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votes
2answers
71 views

Why does this simple if-statement that checks my main characters state never get called (Java/LibGDX)?

Been working on this for a while - basically I want my player to perform a front flip when he jumps (screen tap -> player jumps). I wrote the animation class Animator (extends Player implements ...
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0answers
19 views

Libgdx: different speed on different devices

I am running a simple Libgdx app that I have wrote, on my Android phone and Android tablet and I am getting the unexpected result of having different velocities when a body is moved. To move the body ...
1
vote
2answers
582 views

Matrix rotation wrong orientation LibGDX

I'm having a problem with matrix rotation in libgdx. I rotate it using the method matrix.rotate(Vector3 axis, float angle) but the rotation happens in the model orientation and I need it happens in ...
5
votes
2answers
1k views

Is it legal to pack LibGdx libraries in my jar file? And to obfuscate them?

I'm using LibGDX and deploying a runnable jar file, using the Eclipse feature, with libraries extracted into it. There are also .so files and .dlls inside. Is it legal to do so? I didn't find ...
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0answers
28 views

Architecture vs Performance [Java; Android game] [on hold]

I'm make a sandbox game on Android and can't decide how best way. Has is a significant difference in the performance in Example 2? ~800 tiles drawing on screen 60 times per second. Example 1 (6400 ...
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0answers
24 views

Can't figure out why my sprite isn't moving

In my libGDX game I'm trying to make it so that the player character moves left and right depending on which side of the screen you press. However, when I run my code, I keep getting a null pointer ...
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0answers
36 views

How can I split my entity manager class into a gameworld class and gamerenderer class?

I currently have a libGDX game where I have an entity manager class which is called in the gamescreen. Instead, I would like to utilise it in a gameworld class and a gamerenderer class, but I cannot ...
2
votes
1answer
21 views

Collision detection between axis-aligned bounding box and bitmap (pixel perfect) terrain

Working on a Worms-type game, I have my objects in bounding boxes and they sit on the pixel terrain. Currently I am able to successfully do the collision detection for objects when they enter the ...
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0answers
13 views

save and view snapshot image from android device

I'm having a problem with saving image into an android device this is what i did My java class : package com.test.app; import com.unity3d.player.UnityPlayerActivity; import android.os.Bundle; ...
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0answers
27 views

Partitioning a Tiled map

In my 2d platformer with libGdx, my maps are quite large (eg. 200x200). The player character is only 2 tiles high. I use Box2d for collision, so in my tiled map I have layers for terrain, ...
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votes
0answers
45 views

How to resolse collision between moving and static AABB?

What I have is a map represented as list of Rectangles and player's rectangle. Also I have function to determine depth of the collision: Point TestAABBAABB(Rectangle a, Rectangle b) { ...
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0answers
56 views

How to make a sword swing effect

I'm working on a 2d java game on Slick engine and I always wondered how to make swing effects when striking with a sword? How to code something like this? ...
0
votes
1answer
68 views

Libgdx box2d crashing

im making a game in libgdx which i having a bunch of circle bodies floating around in space and when the player's body crashes into another body, that body deletes and creates two smaller bodies ...
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votes
0answers
66 views

3D Game Rendering (Educational purposes) [closed]

I've been programming off and on for a few years, and have made several 2d games in java. (I also know c# and a bit of c++). I was wondering where I should start off for rendering 3D scenes in java ...
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0answers
30 views

Simulate juggling : how throw and grab objects with JBOX2D

There is an object which simulates a ball and another which simulates a hand (square).I want to be able to catch the ball and throw it with a projection force with the hand on JBOX2D. Any sample code ...
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vote
4answers
1k views

What Java class should I use to represent a Vector?

Does Java have a built-in Vector class suitable for handling collision detection / response? It should have methods like subtract(Vector v), normalize(), dotProduct(Vector v), ... It seems logical to ...
-1
votes
1answer
48 views

How can I implement input handling into my game?

I'm making a libgdx game where the player dodges falling objects. To move the player I have it set so that on desktop he moves left and right when you press A and D respectively. I am trying to ...
-1
votes
0answers
36 views

What should i use to develop multiplayer game online in browser on Java? [closed]

I'd like to develop a video game as a part of a learning process. I study JAVA. Previously I made one using Java applet. Somehow it works only on linux if you have installed IceTea Plugin and won't ...
0
votes
1answer
117 views

Client side latency when using prediction

I've implemented Client-Side prediction into my game, where when input is received by the client, it first sends it to the server and then acts upon it just as the server will, to reduce the ...
0
votes
1answer
46 views

How to get used Resources by State/Map etc?

I'm now managing the Loading of my Resources and I got a Question in my mind. How does my Resource Manager know which Sprites,Sounds, etc. are used by the Map I want to load? First I thought of files ...
0
votes
1answer
71 views

Creating a separate renderer for entities in a 2D game

I'm making a 2D shooter game. As of now, every entity "draws itself", meaning every renderable entity has a draw function. I know it is better if rendering is handled separately, but how can I achieve ...
0
votes
2answers
63 views

Basic 2d platform collision detection algorithm has a slight bug (Java)

I'm trying to implement collision detection between Player (the main character) and a Platform. They are both modelled as rectangles; when player hits the side of a platform he should bounce off it ...
0
votes
3answers
316 views

Calculating Projectile Movement

I'm having some trouble putting together a method that will constantly move a "bullet" in the same direction accurately. Here is what I have so far public Vector3f moveFromPosition(Vector3f location, ...
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votes
2answers
184 views

LibGDX how to change animations

I have a Player Class and i have 3 different Animations for it. I can render them perfectly but i don't know how to change from one animation to another. For exmaple i have 3 animations, one for ...
3
votes
1answer
84 views

Texture loading: Everything at once OR un-/loading the needed assets? [duplicate]

Good evening. We've been developing quite a huge game for android on the basis of AndEngine. So we have a lot of assets to load, especially textures. At the moment everything (sound, textures etc) ...
0
votes
1answer
155 views

Android Game-Loop (rendering & logic removed, but still 'skipping frames')

Overview Guys really hopeing for some help here. My game loop is based on code from Fix Your Timestep!. I've read the article more than a few times, but I can't quite work out what exactly is ...
0
votes
2answers
712 views

Java collision detection and player movement: tips

I have read a short guide for game develompent (java, without external libraries). I'm facing with collision detection and player (and bullets) movements. Now i put the code. Most of it is taken ...
2
votes
1answer
667 views

libGDX using Stage and Actor produces different camera angles on desktop and Android Phone

libGDX using Stage and Actor produces different camera angles on desktop and Android Phone. Here are pictures demonstrating the problem: http://brandonyuh.minus.com/mFpdTSgN17VUq On the desktop ...
2
votes
1answer
143 views

What version of OpenGL should I target for Steam?

I'm planning on developing a game (targeting towards PC and Linux) and putting it up on Steam in the future but I am not sure of what version of OpenGL to target so that the majority of steam users ...
-1
votes
0answers
22 views

how to create an air hockey game for android [closed]

Air hockey game is the best i can figure it out to start with as a first game development topic. i found it interesting and looking for some tutorial or source code or any kinda help regarding with it ...
2
votes
1answer
271 views

When should I load assets for optimal performance?

I'm writing a game using LWJGL and Java, and was wondering if there were best practices for when to load resources. I have seen examples that load all resources when initializing the game (XNA), ones ...
0
votes
1answer
86 views

Multiplying by delta not giving smooth movement

I started working on my first proper game but reached a problem straight away. In short I have a game that runs most of the time at 60 fps. ( I am using Libgdx a popular Java framework) but my game ...
0
votes
1answer
22 views

How can I render a simple lattice in LibGDX?

I have searched all over, but I can't find what I think will be a simple answer. I am using Opengl ES 2.0, and LibGDX. I simply want to use GL_LINES primitives to create a lattice structure. I have ...
0
votes
0answers
52 views

Steering problem in 2d game

I am creating a little 2D non tiled top down game. The enemy uses steering behaviour for chasing player or wandering around, but I do not think my code is working as it should be. My problem is, the ...
0
votes
0answers
28 views

how to make a game object increase/decrease speed each time it touches the x and y edges

i am trying to make an object to invert its speed (increase/decrease) each time it touches the edge of the screen on either the x or y axis with javafx. public void Strategy(){ if ...
0
votes
0answers
71 views

What programming language should I use for a 3d game with low polys? [closed]

There are two languages that I am looking at currently, C# and Java. I would like to use Java because I have more experience with it, but you can't optimize the performance as much as I would like. C# ...
0
votes
0answers
27 views

Is there a way to capture back button twice in same activity libgdx game

Can anybody tell me if there is a possibility to capture back button twice in same activity in libgdx. What i want to achieve is that if the user press back button once the game pause. if in the ...
0
votes
1answer
38 views

Animation fails due to a NullPointerException which I'm certain shouldn't be thrown (LibGDX / Java)

What the title says basically. I've been stuck on this error for a few hours I got it to work earlier but I honestly can't see why its failing now (ctrl + z'd back to the working stage). Here's my ...
0
votes
1answer
46 views

Update Loop in libGDX

I have a screen class in libGDX. In this screen, I want to change a sprite's texture a certain number of times before the screen changes to a different screen class. I tried having a for loop in the ...
0
votes
2answers
139 views

get View from LibGDX for Android

I am making a LibGDX app, and I need to get the view to put to an Android app. Here is the code to get the view: package jangkoo.game.shadowfiend.android; import ...
-2
votes
1answer
35 views

How can I format the number of digits my stopwatch shows? [closed]

I have made a stopwatch that displays the time in seconds during my game in libgdx. At the moment it shows a bunch of digits after the decimal point as it runs. Does anyone know how to change it so it ...
1
vote
0answers
52 views

LibGDX scene2d good practices

I'm developing a game using LibGDX and in a part it has a pretty complex UI for profile selection and stuff. I have some general problems. I'd like to know good practices when generate good looking ...
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votes
1answer
91 views

minecraft source code for use in mods

So I am teaching a class where we will be using java to make minecraft mods. To keep things simple, we are using a third party program to set up the under-the-hood stuff for us (that way we don't have ...
0
votes
1answer
86 views

FBO and VBO for performance

I discovered VBO's recently and changed my code to use them instead of immediate mode. Now I'm rendering 25000 squares and it's really slowing down my FPS. If I drew all the squares VBO's to an FBO, ...
0
votes
1answer
73 views

How do I efficiently deal with entities moving between chunks?

I am working on a game in which entities need to be stored in chunks. This is the basic chunk format: public static Entity [row][column][entities] chunkEntities; However, some of my entities move. ...
1
vote
1answer
177 views

Structure gameobjects and call events

I'm working on a 2D tile based game in which the player interacts with other game objects (chests, AI, Doors, Houses etc...). The entire map will be stored in a file which I can read. When loading the ...