2D games are drawn in a two-dimensional space using two-dimensional objects. To represent its position, each game object will have an `x` and a `y` coordinate.

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2
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2answers
207 views

How to make a projectile align correctly with the entity that shot it

I'm developing a 2D game. In the game, all entities can rotate 360 degrees. Each entity holds an angle value, and every frame it is drawn rotated around it's center by it's current angle value. For ...
1
vote
1answer
71 views

Dealing with back to front drawing with alpha blending and z buffer for a list of 2d quads

I'm using depth buffer as a layering system for my 2d render and I have to draw them from back to front to make semi-transparent quads work out. The problem is I have to sort my quads vector based on ...
0
votes
0answers
33 views

top down 8 directional movement - need help with collision [duplicate]

I have for some time now been strugling with movement in my game. I want a zelda like 8 directional top-down movement. I have tried different things, but non of them have been perfect. EDIT: ...
2
votes
1answer
364 views

Can the Shuriken particle system create particles with random shapes and sizes?

I want to create differently sized (but small, relative to the characters) dust clouds for player movement that move away from the player and fade away by shrinking. This animated GIF from Samurai ...
1
vote
0answers
32 views

Unity 2D angular velocity center [duplicate]

I try to add angular velocity to my GameObject with this command: rigidbody2D.angularVelocity = Random.value * tumble; All works, but I want center of velocity be in the center of my rigidbody, but ...
1
vote
2answers
327 views

How can I support objects larger than a single tile in a 2D tile engine?

I´m currently working on a 2D Engine containing an isometric tile map. It´s running quite well but I'm not sure if I´ve chosen the best approach for that kind of engine. To give you an idea what I´m ...
1
vote
2answers
193 views

Detecting Hitbox Collisions (Rectangle)

So I have some Hitboxes set up on 2 classes, HealthPickup and Player. public static Rectangle Hitbox; public override void Initialize() { Hitbox = new Rectangle(Pos.X, Pos.Y, 32, 32); } That's ...
2
votes
2answers
248 views

Calculate laser bounce inside polygon

I am trying to calculate the reflection of a laser within a polygon. My current calculations are probably quite long-winded because I'm building on line intersection and other functions. The problem ...
1
vote
1answer
71 views

Resolving penentration after collision using Separating Axis Thereom

I implemented collision detection in my game using SAT. The detection works, but I'm trying to use the algorithm to figure out the penetration vector of the two OBBs and push them apart (before doing ...
2
votes
2answers
144 views

AI and shapes in 2D Grid

I'm working on a grid- and turn-based strategy rpg. My problem is concerning finding best position for my AI to use a skill. But lets start at the beginning. My plan is to make each skill an action ...
2
votes
1answer
221 views

Inverse Explosion with Unity2d

I am currently trying to make all other objects push away from the player when the player explodes. It currently works, but it pushes close objects a little and far objects very far. What I want is ...
1
vote
2answers
119 views

Inifinite scrolling draggable background for a 2D editor

I need to create something like blender's Node Editor for my 2D editor. Now I am not sure how to create the background so it is static infinite and draggable simillar to blender. I need to make it so ...
2
votes
2answers
130 views

How to correctly implement player acceleration caused by player input

In my game I implement movement in the Player class like so: // called from Player's update() method, which is called from the gameloop. void move(){ velocity.x += acceleration.x; velocity.y ...
1
vote
1answer
91 views

2D how to add graphics for liquid physics?

I was always wondering how to add the graphics to a a blob body for example, regardless of what engine or library you are using, i want to know (theoratically) how to move from this state : ...
2
votes
2answers
198 views

XNA - Making 2D Hexagons Connect With Each Other

Hey so I'm working on a top-down 2D strategy game in XNA, and the tiles are hexagons. I can't have a grid because of the game mechanics, so everything has its own location, and every tile object is ...
0
votes
2answers
209 views

What are some ways to store level data in a game like Gunpoint? [closed]

Gunpoint is a 2D stealth game available here. I was wondering how you might go about storing level data for a game like this. I'm mostly concerned about how the collision detection is saved. There are ...
3
votes
1answer
535 views

How to compress Unity apk output?

I made a game with Unity but the size of .apk file got so large, it is about 70mb... Is there some way that I can compress my apk file?
0
votes
0answers
145 views

Animation system for smooth character movement

For 2D games similar to the indie game Limbo, what kind of animation system or techniques do such games typically employ? I'm primarily interested in how the animation data is stored and used by the ...
-1
votes
1answer
88 views

Libgdx change color of Texture at runtime [closed]

i allready asked this on Stackoverflow, but i think this question may belong here. In a Libgdx game i have some Animations for my Player. All the Frames for this Animation are inside a TextureAtlas. ...
0
votes
2answers
200 views

How to move an image back and forth with javascript

I currently am trying to make a baseball game and have this code here: http://jsfiddle.net/769BK/ I have the baseballX set to a decrement, and then I try increasing the value using baseballX++; but it ...
0
votes
0answers
157 views

Zelda-style Top-down RPG. Storing data for each tile type

I'm creating a Zelda-style RPG using Tiled, C#, and MonoGame. When my code parses the .tmx file, it will get a number to associate with each tile type based off of their position in the tile sheet. If ...
0
votes
1answer
109 views

Resolution independent physics

I'm making a game like Doodlejump but don't know how to make the physics scale on multiple resolutions. I also can't find anything related to this on Google. Right now I'm scaling the game using ...
-1
votes
1answer
117 views

Adding a small slide when player releases left/right key

The aim is for the player object to slow down and stop instead of just stopping dead. The following codes works ok when the player is not jumping, but gets stuck in an object if the player is in the ...
1
vote
1answer
93 views

Electronic circuit simulator four-way flood-filling issues

I've made an electronic circuit board simulator which has simply 3 types of tiles: wires, power sources, and inverters. Wires connect to anything they touch, other than the sides of inverters; ...
4
votes
2answers
233 views

How would I go about updating my electronic circuit simulator's 'electricity'?

I have made an application which allows the user to place down wires, power sources, and inverters on a virtual circuit board. All connections between tiles are automatic, as shown here: As you ...
0
votes
1answer
661 views

Unity3D : Pause Menu - Android

I am making a 2D game for Android. Almost completed the game but now I need a pause game option. I added a pause icon on the top right side of the screen. The icon is a GUI texture. What I did so far ...
5
votes
5answers
1k views

Technical differences between square and hexagon for a grid?

I'm developing a 2D city-building game and trying to decide on the type of grid. There will be vehicles, so the unit movement is important too. I know there are visual differences for using Squares ...
0
votes
1answer
134 views

How to solve problems with movement in simple tile based multiplayer game?

I'm making a simple tile based 2D multiplayer game in JavaScript using socket.io where you can move one tile every 200 ms. The two solutions I've tried are as follows: The client sends "walk one ...
0
votes
1answer
118 views

spinning a 2d Cube

I know that a cube is actually a 3d shape , but i have some other problem over here. I have been doing 2D Game dev using libgdx but have never touched 3D rendering. Now what I want in my 2D game is ...
0
votes
2answers
224 views

How can I make an object's hitbox rotate with its texture?

In XNA, when you have a rectangular sprite that doesnt rotate, it's easy to get its four corners to make a hitbox. However, when you do a rotation, the points get moved and I assume there is some kind ...
0
votes
0answers
107 views

Sun & Moon Movement

I'm creating a 2D HTML5 Canvas Game and am stuck on how to go about animating my Sun & Moon. The current setup is basically setting the moon at -1024 on the X-axis and the sun at 0 and animating ...
0
votes
2answers
204 views

How to move an object using X and Y coordinates in JavaScript

I am making a 2d baseball game with JavaScript and HTML5 and am trying to move an image that I have drawn with JavaScript like so: //canvas var c = document.getElementById("gameCanvas"); ...
4
votes
1answer
101 views

2D Boxes/Vertices merging

I want to optimize my colliders geometry, at the moment is composed by boxes (it's a tile based game) of the same dimensions, i want to remove the inner vertices to have, at the end, only the shell. ...
1
vote
0answers
73 views

unity4.3 rigidbody2d unexpected force behaviour

So guys ive edited the question and here is what my problem is i have a player which has a rigidbody2d attached to it.my player is able to doublejump in the air nicely and stick to walls when ...
13
votes
4answers
634 views

How to implement soft edge areas with particles

My game is created using Phaser, but the question itself is engine-agnostic. In my game I have several environments, essentially polygonal areas that player characters can move into and be affected ...
0
votes
0answers
73 views

Pixel alignment algorithm

I have a set of square blocks, I want to draw them in a window. I am sure the coordinates calculation is correct. But on the screen, some squares' edge overlap with other, some are not. I remember ...
0
votes
1answer
118 views

Implementing Camera Zoom in a 2D Engine

I'm currently trying to implement camera scaling/zoom in my 2D Engine. Normally I calculate the Sprite's drawing size and position similar to this pseudo code: render() { var x = sprite.x; ...
5
votes
1answer
638 views

Unity falling body pendulum behaviour

I wonder if someone could provide some guidance. Im attempting to create a pendulum like behaviour in 2D space in Unity without using a hinge joint. Essentially I want to affect a falling body to ...
2
votes
1answer
312 views

Procedural Generation of tile-based 2d World

I am writing a 2d game that uses tile-based top-down graphics to build the world (i.e. the ground plane). Manually made this works fine. Now I want to generate the ground plane procedurally at run ...
0
votes
0answers
79 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 ...
2
votes
1answer
82 views

Fixed timestep and interpolation question

I'm following Glenn Fiedlers excellent Fix Your Timestep! tutorial to step my 2D game. The problem I'm facing is in the interpolation phase in the end. My game has a Tween-function which lets me ...
0
votes
1answer
73 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
1answer
300 views

Sorting for 2D Drawing

I am drawing a game in 2D (isometric) My objects have their own arrays. (i.e. Tiles[], Objects[], Particles[], etc) I want to have a draw[] array to hold anything that will be drawn. Because it is ...
0
votes
0answers
66 views

2D Platform Jump Animation

I have implemented the jump and want to add some animation to it. I have a tile for "preparing for jumping", one for jumping and one for landing. I use a time based system for jump and I already ...
0
votes
0answers
234 views

SurfaceView.Callback.surfaceDestroyed is called too early in Android

I'm making a simple animation application. Everything works as planned, except one little detail: About 50% of the time, exiting the application (Home or Lock button), makes the Logic throw a ...
0
votes
1answer
233 views

Create 2D sprites with libGdx using a shape and a texture separately

I am creating a 2D game with LibGdx that will have creatures that are generated from dozens of characteristics with potentially millions of unique combinations. For each segment of each creature, I ...
6
votes
3answers
920 views

Why does Unity in 2d mode employ scaling and the default othographic size the way it does?

I previously used SFML, XNA, Monogame, etc to create 2d games, where if I display a 100px sprite on the screen, it will take up 100px. If I use 128px tiles to create a background, the first tile will ...
0
votes
2answers
83 views

Trouble getting shadow maps working

I am trying to implement shadow maps in my game following this tutorial. For some reason, the light is not being occluded. In the above screenshot, the big white sprite in the foreground is a ...
0
votes
1answer
93 views

TiledMap resizing and aspect ratio with LibGDX

I'm making a game and I don't know how to resize my TiledMap when the window is bigger but keeping its squared shape. Here is a screen: When I change window size, here's what happens: I want ...
13
votes
1answer
679 views

How to implement fake 3D like distortion effects for a 2D side scrolling game?

I'm not certain of the proper terms to search on or even where to begin though I imagine it is some sort of post processing effect. I've seen games like I Wanna Be The Boshy and You Have To Win the ...