0
votes
0answers
10 views

[LibGdx]Moving a fixture on a body

I'm working with Box2D and I have a basic platform and a box bounces off of it. // Static Platform bdef.position.set(160 / PPM, 120 / PPM); bdef.type = BodyType.StaticBody; Body b = ...
1
vote
1answer
34 views

Box2DLights - the center of sprites are always 100% unlit (black) unless Xray is on

I'm using a ConeLight at 180 degrees, with this setup: pl = new ConeLight(rayHandler, 256, new Color(0.5f, 0.5f, 0.5f, 1f), 280f, 400 - x, 300 - y, 0, 180); And the object I'm casting a shadow on ...
0
votes
1answer
55 views

Bodies going through the walls of a box

I have a game where the user controls a box to collect falling balls. However, very often the balls will just fall through the walls of the box and be flung away. What could be causing the balls to do ...
3
votes
2answers
100 views

Why are my Box2D wheels slipping on ground?

I have a car, set up in Box2D as a rectangle connected with two wheels using WheelJoints: The wheels are defined as follows: FixtureDef wheelFixtureDef = new FixtureDef(); ...
1
vote
1answer
55 views

LibGDX Box2DLights shadow offset problem on bodies

Hello I just started to use LibGDX, and it's awesome. I looked at the Box2DLights library, and started to learn how the lighting work here. I got something up: As you can see, it works, but the ...
0
votes
0answers
48 views

box2dlights conelight rotation is off

I'm using libgdx/box2dlights for my game~ I have a conelight set up as such: ConeLight cl = new ConeLight(rh, 32, new Color(0f, 0.0f, 0.0f, 1.0f), 3, 0, 0, 0, 1); where "rh" is a RayHandler set to ...
0
votes
1answer
29 views

revolutejoint doesn't seem to rotate

I have a revolute joint set up as such in libgdx + box2d: RevoluteJointDef rjd = new RevoluteJointDef(); rjd.initialize(body1, body2, arm.getWorldCenter()); rjd.motorSpeed ...
0
votes
0answers
45 views

Box2D and randomly generated tilemaps

I am making a 2D Terraria-style sidescrolling game. I want to use box2d for the physics. However, I am using tilemaps for the maps, and I do not know of a processor-efficient way to use Box2D bodies ...
2
votes
2answers
127 views

how do I create a moving type of block like in Mario[box2d]

I want to create a block which only moves up and only when hit from below. I am trying out a distance joint and I read it can be used as a spring, is this the correct solution? the way I have tried ...
1
vote
1answer
188 views

LibGdx sprite rotation vs Box2D physics rotation problem

LibGdx sprite rotation vs Box2D physics rotation problem Tearing my hair out on this one. I am an experienced software developer, but very new to LibGdx and Box2D development. I am writing a game ...
2
votes
1answer
85 views

Using Box2d to model rotating turret

I would like to model a rotating "turret" on top of a tank-like object in 2D from the side view like pictured here: Notice the faint outline of a gun protruding to the upper left courtesy of ...
1
vote
1answer
64 views

Libgdx Box2d createfixture crashes vm intermittently

I have a hard to debug problem. I have a Box2D game which creates a wheeled vehicle. I want the vehicle body to reflect when it goes from moving left to moving right. to do this i set a flag in a ...
0
votes
1answer
62 views

Is there any reasons to make sprites and bodies line up?

So in LibGDX the Sprite objects position is where it's 0,0 mark is in the word. In Box2D a a bodies position is in it's center. So to line these up when you update the sprites position with the ...
0
votes
0answers
32 views

GWT problem with Box2D WheelJoint

I am using the below libgdx java code for a wheel joint and rear axle using Box2D. This works fine for android, Desktop, but when I attempt to run through GWT I get the following error. at ...
2
votes
1answer
51 views

How do I dynamically set a WheelJoint's anchor points?

I've created a car in RUBE and imported it into my game. The game has a tuning menu, allowing the ride height of the car to be adjusted with a slider. I can't work out how to change the position of ...
0
votes
0answers
103 views

Box2dLights rendering in bigger scale

So basically my box2dLights are rendering in wreid places. The circle in center is my player and as you can see lamp which should be aligned to player is in the right-top corner. my code: package ...
0
votes
1answer
307 views

How to get width and height from a body in box2d?

I am working on a game in Libgdx framework. I have to get width and height from a body in box2d. is their any way to get width an d height from a body in box2d??
1
vote
1answer
278 views

Movement and rotation of bodies in top down game

We are developing a 2D top down game with libgdx using the included box2d as physics engine. We don't want our bodies to accelerate but to instantly move with the wanted velocity. The bodies are ...
2
votes
1answer
500 views

Maintaining velocity of free fall body using Box2D in libGDX

I want to maintain the speed of a free-falling Box2D body using LibGDX. I'd like the vertical velocity increase with the level. I've applied a linear impulse and velocity actually increases like this: ...
3
votes
3answers
155 views

How do I change the relative origins of a Box2D World and a TiledMap in Libgdx?

I'm playing around with Box2D and TiledMaps and I've come across this minor annoyance. As you can see, both Box2D and TiledMap render at the center of the screen. This forces me to compensate by ...
1
vote
0answers
172 views

LibGDX - Box2D: Realistic Light and Layers

I'm having some problems with my current game. Short description: It's a 2D game where you have to avoid the lights or you lose HP. My problem is the following one: Here is the rendering process: ...
0
votes
1answer
82 views

Trying to make sprite float up and down [closed]

Using LibGDX + Box2D and my understanding of the answer posted from this question: Here I apply the following impulse: // modify sprite's Box2d Body object int a = 8; // amplitude int f = 1; // ...
2
votes
2answers
143 views

How do I create a horizontally centered “gravity line”?

Here's my ideal scenario: A game object (in blue) can change its horizontal velocity, but it will be pulled back by gravity (dotted gray arrows) toward a central vertical line (in red). How can I ...
0
votes
1answer
123 views

How could I control an air hockey 's AI paddle?

I am making an air hockey game on Android with Box2D and libgdx. For the manual control, I just use the MouseJoint and it works perfectly. However, for the AI control, there is a problem: I've made a ...
1
vote
2answers
595 views

Box2D Libgdx removing bodies in case of simultaneous collisions

I am making a clone for the BreakOut game. I'm using Box2D and Libgdx for it. In the game, one scenario is that there could be 2-3 balls at one time. Now the problem occurs when 2 or more balls ...
1
vote
2answers
102 views

How can I find all connected objects of the same type recursively?

In my game, when a user selects an object of some type, I'd like to search for all other objects of the same type that are connected to that first one. For example, if the user selects a object of ...
0
votes
1answer
364 views

Communication between Box2D and libGDX Stage (Scene2D) running in separate threads

I'm making a physics based 2D game using libGDX and Box2D. I want to move the execution of the simulation out of render thread. I use immutable messages and the BlockingQueue to pass the information ...
2
votes
2answers
2k views

How can I convert a tilemap to a Box2D world?

I want to use Box2D physics and lighting with a .tmx map. How can I "convert" a tilemap to Box2D world? My basic idea is to go through the tiles on the map and create an object for them in Box2D. I'm ...
2
votes
1answer
238 views

libgdx default saving mechanism for box2d world

I want to save my game in libgdx, and I have no problem using Kryo to save everything, except the box2d Worlds and the RayHandlers from box2dlights - these are not Serializable and do not have default ...
0
votes
0answers
34 views

2D collision beetween a sprite and an array of sprites [duplicate]

I am creating a simple Android jumper (think Doodle Jump or Abduction) using libGDX so I can get started in game programming. My problem is that I need to figure out a way to check for collision ...
5
votes
1answer
267 views

Running multiple box2D world objects on a server

I'm creating a multiplayer game using LibGdx (with Box2d) and Kryonet. Since this is the first time I work on multiplayer games, I read a bit about server - client implementations, and it turns out ...
1
vote
0answers
62 views

Need to join 2 bodies via weld joint but not on center of mass

I have successfully join 2 bodies via weld joint , but my problem is I want to join corners of bodies not on centre of mass. Is there any way to achieve this? Above image consist 3 polygon body that ...
1
vote
1answer
341 views

Movement of body after applying weld joint

I have two rectangular bodies. I've applied Weldjoint successfully on these bodies. I want to move that joined body by applying linear impulse. After weld joint, these two bodies becomes single body ...
0
votes
1answer
725 views

coloring box2d body in LibGDX

I want to color polygon of box2d in LibGDX. Found below useful class for that. http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/glutils/ShapeRenderer.html But, it is not ...
3
votes
1answer
544 views

box2d raycast filter category

I am trying to filter a category in my ray casting (jBox2D within libGDX), which should return the closest object that does not belong to the category LEVEL0. I've tried a plethora of approaches, but ...
0
votes
1answer
231 views

Remove a body when touched in LibGDX(Box2D)

I am using LibGDX to create a new project. What i am trying to do is, i load bodies from a tmx file into levels which works fine. The bodies also has a sprite with them. The problem is, is i would ...
0
votes
1answer
62 views

libgdx fixture is giving unresponsive error

need some support. I am novice in libgdx game engine. Below is my code package com.game.box2d.fruitcart; import com.badlogic.gdx.Game; import com.badlogic.gdx.Gdx; import ...
6
votes
0answers
272 views

Box2D strange collisions (jitter) on sharp edges [closed]

I'm currently developing 2D side scroll game with Libgdx + Box2D. And I'm facing some problems with ChainShape (the ground) and PolygonShape (the cart body) collisions. Please look at this video: ...
0
votes
0answers
214 views

Box2D revoluteJoint Motor speed,Max torque scaling for diff Devices

Hi i am using Box2d Revolute Joint as a joint for wheel it's connect to Wheel and Body of my Car i am using RUBE for creating the Box2D world Prob. i am using a scaling floating point number to scale ...
0
votes
1answer
2k views

Libgdx explain steps for beginner to create and use image as a box2d body [closed]

I am basically from corona background and new to LibGdx , familiar with stage and actor from scene2D. Now wants to use physics body from box2d in the game besides using actor from scene2D. But I ...
0
votes
1answer
480 views

Movement with box2d using libgdx

I am pretty new to using physics engine and would like to know what is best practice for movement of playercharacters. Currently I have a class called Hero that has a CircleShape and when the user ...
2
votes
0answers
313 views

Choosing a level editor of a 2d platformer [closed]

I'm working with a small team on a 2D platformer game in Java (LibGDX) that uses Box2D for physics. Our team is looking for a tool to make the levels (that we will be able to integrate with the Box2D ...
0
votes
0answers
380 views

Libgdx - Box2D: Attach Physics Body Editor Loader mask to dynamic texture

I have a texture of a circle, which gets drawn to a new position when a touch drag occurs. It isn’t set up as a body. I have made a physics map using Aurelien Ribon's Physics Body Editor Loader GUI ...
0
votes
1answer
659 views

Error using Physics Body Editor for LibGDX

In my game, I've been trying to use the physics body editor for libgdx, but I kept on getting an error. So I thought there was probably something wrong with my code so I took the example off of the ...
4
votes
1answer
802 views

Problem Implementing Texture on Libgdx Mesh of Randomized Terrain

I'm having problems understanding how to apply a texture to a non-rectangular object. The following code creates textures such as this: from the debug renderer I think I've got the physical shape ...
6
votes
1answer
890 views

Generating a physics body for 2D Worms-like Terrain

I wrote a processing sketch that generates hills for a scorched earth clone, like this: I'm trying to figure out how to make this a physics object in libgdx, but I'm having problems figuring out ...
0
votes
1answer
276 views

Moving a Box2D object in the direction it is facing using applyForce [duplicate]

I'm trying to apply force to a polygon physics object to move it. Whilst I can get it to move upwards easily enough, I'm trying to get it to move in the direction in which it is pointing. Here's my ...
4
votes
2answers
358 views

2.5d with box2d - approaches from the top and bottom

So, I'm using box2d for my 2.5d game (think double dragon, tmnt arcade, castle crashers) where you can move around on the z-axis (faked as y-axis movement). Basically, I have box2d only doing ...
1
vote
1answer
613 views

Libgdx import bin/xml/json from physics editor

I'm using Libgdx. I did a simple json file in Physics Body Editor and I don't have any idea how could I import it into my physic world in libgdx. Any idea will be appreciated. P.S: Sorry if there ...
3
votes
3answers
387 views

Libgdx body passing through block then fall on it

I'm using libgdx and its physic engine Box2d. My question is : how could I make my box2d body go through a block , ignore the first collison than make the block active so the ball can fall onto it. A ...