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

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275 views

LWJGL: Camera distance from image plane?

Let me paste some code before I ask the question... public static void createWindow(int[] args) { try { Display.setFullscreen(false); DisplayMode d[] = ...
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2answers
72 views

Adjust bitmaps according to screen ratios on android

I always thought that pixels were square... it turns out i'm wrong, and I am quite worried by this. This means that if I draw a circle, it will be round on my screen but it could be an ellipse on ...
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1answer
45 views

Moving a Polygon based on Camera position [JAVA]

I am in the process of implementing TMX Maps (made in Tiled) for my game. In Tiled, I can create polygons, which leaves a tag, containing the points. Loading in these points to a Polygon ...
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1answer
41 views

Java 2D Game Hitbox Detection & Rounded Corners

I am working on a simple 2D game with Java, swing and no framework. I have a rectangular player that the user can move around. On the map are few obstacles which the player should not be able to go ...
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1answer
36 views

Java libgdx get clicked square without iter

I would like to detect which square is clicked without iterating over all elements! i don't want to do this anymore for all elements. if( x >= this.getAnchorX()-HalfWidth && x <= ...
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0answers
45 views

Drawing fonts with LWJGL3 with OpenGL

I'm very sorry if this question has already been answered, but since I've been struggling with this for many days I thought I'd give it a shot here. My goal is to somehow render some text on the ...
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1answer
67 views

Is the standard collision detection in Slick2D too heavy for broadphase?

I was wondering two things about the built in shape detection of Slick2D. When executed on a lot of shapes, how performant are the intersects and containsmethods, and what kind of algorithm is behind ...
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0answers
17 views

JBullet - Object is colliding at the wrong location!

I'm trying to make archers walk on my ship. I create the ship mesh like this: { Model mesh = null; try { mesh = OBJLoader.loadModel(new File("res/ship.obj")); } ...
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2answers
1k views

Android bitmap placing

I've recently added an explosion in my game, for when enemies get killed, and it works fine and all, but the explosion wont "spawn" on the enemies x and y. The problem is that I'm not drawing the ...
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1answer
477 views

Java: AI to make a mob face the player working half-way correctly

While creating some basic AI for my "ghost" mob that is just up for testing at the moment, I thought of allowing it to face the player, depending on the player location. I get it to work correctly, ...
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1answer
67 views

How can I perfectly center an image in a window using Slick2d?

Dividing the window's width by two to position it in the middle of the x-axis did not work. What else can I do?
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1answer
450 views

Java: See if Mouse is hovering/clicking Sprite

The game I am developing is in which you defend the Cell from the Viruses, and I need the sprites to have a MouseListener for when the mouse clicks on that sprite, it will get destroyed, and I cannot ...
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1answer
2k views

How to match user click and the sprite object position in libGDX framework

I am using libGDX Java framework for developing a practice game in Eclipse. My game is in landscape mode and I am using sprite image for game assets. Actually I am trying to follow the Kilobolt ...
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0answers
12 views

How to zoom and scroll in libGdx?

I am trying to both A.) Pinch zoom my game scene and B.) Move (scroll) my game scene but I have not found many examples. I learn more by examples than by reading API documentation (although I am ...
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3answers
5k views

How do I find a point given an angle and distance to it?

I'm working on a school project creating a tank team in the programming game Robocode. (It's a tank battle game with self-programmed bots, in Java). I'm programming a scout bot that scans, finds ...
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1answer
18 views

How to map texture to shape in Slick 2D

I need to map texture to shape. Texture: This is a example of shapes I need to map texture to: Notice that each piece in mesh has exactly 4 point to map texture. Logic is pretty straight ...
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1answer
35 views

Libgdx Actor touch undetected

I am looking for detect touch in an actor. The touch in my game is detected in wrong part of the screen. I want to detect touch only on the red circle, here is the code: Static_values public class ...
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2answers
138 views

LibGDX - Best way of scrolling background

I'm new to LibGDX and i'm trying to implement a screen where i have a guy running and the ground under him scrolling to give impression he is really running in a sidewalk for example. The ground ...
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1answer
156 views

Mouse coordinate conversion Libgdx

I have a camera: //Map is a my object that wrapper of TiledMap class In the create method: this.renderer=new OrthogonalTiledMapRenderer(this.map.getMap(); this.camera=new OrthographicCamera(); ...
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1answer
134 views

LibGDX - Accelerometer Problems

I got some issues. I'm using LibGDX. When I hit an object, my Fighter is supposed to fall to the Ground. BUT, because of the Accelerometer, i can still move it up and down eventhough it died. The ...
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1answer
96 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 ...
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1answer
81 views

How BufferStrategy works

I've used this piece of code a lot in my games, but I still don't know exactly how it works. // Main loop while (!done) { // Prepare for rendering the next frame // ... // Render ...
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1answer
64 views

Rotating a swinging sword in LWJGL gives wierd results

I'm making a 2d top down game in Java using LWJGL(OpenGL, essentially). I recently tried adding a swinging sword mechanism. My coordinate system is set to the bottom left FOR ALL objects. The rotation ...
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1answer
105 views

Slick2D: Animation not being parsed from spritesheet correctly

I have a 960x960 spritesheet with each tile being 192x192. I initialized my spritesheet and animation like so: spritesheet = new SpriteSheet("resources/spritesheets/player.png", 192, 192); ...
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1answer
62 views

LibGDX Tiled Map - how to get embedded objects

I am using LibGDX to learn Game Development. I have reached the phase I am learning to use Tiled Maps. In Tiled map editor, there is a feature where we can pick a tile in the tile set, go to View -> ...
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1answer
403 views

Multiple enemy array in LibGDX

I am trying to make a multiple enemy array, where every 30 secods a new bullet comes from a random point. And if the bullet is clicked it should disapear and a pop like an explosion should appear. And ...
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2answers
2k views

How do I add an image inside a rectangle or a circle in JavaFX?

Suppose we have a rectangle called r Rectangle r = new Rectangle(40, 20); and an image called image Image image = new Image("...src for image"); How do I fit the image inside the rectangle? ...
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1answer
36 views

Correct way to integrate scaled axis angular velocity into a quaternion

Across my travels on the internet I have came across to ways of integrating a scaled axis angular velocity into a quaternion. The first way converts the angular velocity into an axis angle quaternion ...
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1answer
87 views

LibGdx - How can I correctly handle tile transitions / connected textures?

So I am making a tiled game and I need to connect textures correctly based on whats next to it. With tiles that had connection really close to the edge of the tile I could just use the 4 bit meathod ...
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1answer
195 views

Move Box2D body towards mouse click

In a top down game using Box2D, I would like the player's Box2D body to rotate towards the mouse click, and then move to a point on mouse click (move, not teleport). I have worked out the rotation ...
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2answers
170 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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1answer
69 views

In Eclipse using libgdx, what does “project description file is missing” mean?

In a sudden case of nostalgia, I switched my eclipse workplace from my working libgdx projects to an older one. After looking through my old stuff I had some problems switching it back, since I didn't ...
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0answers
134 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? ...
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0answers
29 views

LibGDX's HTML project doesn't show anything in Browser

The question is self explanatory, when I run my demo-html project as a Web Application and I open Chrome with the provided link by eclipse, my browser doesn't show the image it is supposed to show in ...
0
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1answer
228 views

Grid collision - finding the location of an entity in each box

I am trying to implement grid-based collision in a 2d game with moving circles. The canvas is 400x400 pixels. Below you can see the code for my Grid class. What I want it to do is check inside which ...
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0answers
27 views

How to draw square composed of four triangles ? ( libgdx )

I've a case in which I need to draw square composed of four triangles like in the photo bellow : The triangles parameters are stored in the JDBC , I know how to draw shapes in Lbgdx but this kind ...
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4answers
441 views

What is the easiest way to make an object follow the edge of a sprite?

I have a rounded rectangle sprite and another sprite that's just a circle. I want the center of the circle to follow the edge of the rounded rectangle. Is there any easy way to accomplish this task? ...
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0answers
75 views

How do I manually create a .atlas file?

I am trying to learn Andengine, and it seems it does not support sprites in any other way other thab a Texture Atlas. I am using the Android AIDE app and importing the older Andengine .JAR because I ...
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2answers
70 views

Gradual rotation of an object in Java

I'm using Java to learn some movement algorithm. I would like to implement the "wandering" algorithm, but in order to do it, i should understand how to rotate an Object gradually. Actually, my Player ...
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2answers
128 views

Help with Resolving Pixel Perfect Collision

Hi I'm having trouble resolving "Collision detection between axis-aligned bounding box and bitmap (pixel perfect) terrain on a Worms type game". (Read previous question to find more information about ...
0
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1answer
27 views

Resultant Vector Of Circle Line Collision

For my game I need to have a circle collide against a wall and bounce off in the appropriate direction. I've looked around for a while and haven't found a good solution to my problem. I have a diagram ...
0
votes
1answer
82 views

Implementing Spine animations in Libgdx

I've been searching a lot for a guide on how to implement 2D animations exported from Spine to Libgdx, but all I could find was outdated tutorials and source codes. I can handle basic Libgdx but Spine ...
1
vote
1answer
46 views

Understanding HingeConstraint in jBullet

I'm using the java port of BulletPhysics engine jBullet. I'd like to make a joints between 2 triangles so that one edge of the first and one edge of the seconds act like a hinge. But I don't ...
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votes
2answers
71 views

How would I create classes for each map tile instead of using a tmx? LibGdx

I am making a top down style game using LibGdx that I want to be randomly generated each new game load. I already have the algorithm to generate the array for what tile should be what. But i'm ...
0
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3answers
165 views

Where the physics should be put

I'm studying a book of artificial intelligence applied to games. It shows several algorithms for each argument (movements, path finding.. ecc). Unfortunately (but obviously) it does not explains how ...
0
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1answer
40 views

Handling collision with LWJGL rectangles

I'm testing collision with other rectangles so I can implement it into my current project. The problem is the rectangle starts at the right x and y, but I'm not sure where exactly they are. I'm pretty ...
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vote
2answers
64 views

Making an organized rendering class [closed]

I'm using LWJGL (opeengl wrapper for Java) and Don't know how to make a renderer class for OpenGL. So In Immediate mode rendering I'd do a method like this to draw quadralaterals. public static void ...
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1answer
865 views

How handle nifty initialization in a Slick2D state based game?

I'm using Slick2D and Nifty GUI. I decided to use a state based approach for my game and since i want to use Nifty GUI, i use the classes NiftyStateBasedGame for the main and ...
2
votes
2answers
361 views

OpenGL generate hills looking vertices

I want to generate a terrain which looks like hills. Some sort of sine waves. Should be as simple as possible. But I can not figure out how. I get very scary results, which are nothing worth. I need ...
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1answer
376 views

libgdx ActorGestureListener.pan() parameters not moving actor in smooth line

I override the pan method in ActorGestureListener to implement dragging actors in libgdx (scene2d). When I move individual pieces on a board they move smoothly, but when moving the whole board, the ...