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.

learn more… | top users | synonyms

0
votes
2answers
282 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
2answers
460 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
124 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
90 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
680 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
78 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
186 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
1k 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
522 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
118 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
101 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
121 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
338 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
78 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
431 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
265 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
2k 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
93 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
153 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
842 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 ...
0
votes
3answers
505 views

Line of sight on a 2d grid

I've been looking for similar questions here and on google, but none have worked for me yet. I have a game, where I have a 2d array of square tiles (they're objects with accessible x and y pixel ...
1
vote
1answer
45 views

How to make the images appear in a specific location? [closed]

How can I draw a sprite in a specific location of the screen using native Android 2D graphics API? The image should stay in the location specified.
0
votes
1answer
395 views

Background Sprite Setting

For my 2d game, I want to set background image. So that I am using multiple background images for that purpose. But it can't set correctly on screen that illustrated in following image. Also for ...
0
votes
0answers
185 views

How to implement 2D Ai Wandering with 8 - directional movement using Perspective Images in unity 4.3?

My requirement is to move a 2D characters with perspective view images has to wander in game area by choosing dynamic path and according to that the AI character has to switch the animations based on ...
0
votes
2answers
211 views

Smooth moving on tile-based map, how to fix simple collisions?

I've already had some experiences about the work of 2 dimensional square-based playfields and moving a player on them. Though, when a square has multiple pixel sizes, and player moves e.g. 1 pixel per ...
0
votes
1answer
76 views

Light direction not being calculated correctly

I'm trying to implement deferred lighting in my game, and have run into an issue with normals. The image above shows the lighting being applied to a tile map. The yellow shade represents the ...
22
votes
6answers
2k views

How can I Intercept object with a circular motion

I am creating a 2d space game and need to make the spaceship intercept a planet. I have working code for straight line intercepts but cannot figure out how to calculate the planets location in a ...
0
votes
2answers
377 views

Wall jumping collision detection anomaly

I'm creating a game where the player ascends a tower by wall jumping his way to the top. When the player has collided with the right wall they can only jump left and vice versa. Here is my current ...
1
vote
2answers
353 views

libgdx: How do you remove a cell from TiledMap?

I am making a Terraria-style sidescrolling game with an open world. I am using a TiledMap to render all of the tiles. If I want to remove a tile, like if it is broken, how would I stop it from being ...
9
votes
2answers
479 views

Dynamic thruster balancing of space ship

The space ships in my game a meant to be player-built with an arbitrary amount of thrusters attached anywhere with any rotation. I currently have some dirty code to rotate the ship to a given angle ...
0
votes
1answer
278 views

How to properly handle top down 2D collision?

I can never seem to get this right, well polished at least. I'm creating a top down game in XNA, and collision has always been an issue for me to do properly. Detecting collision is fine, but ...
-2
votes
1answer
120 views

in a 2D game that has an array as a map how to make graphics look nice?

I have a map that's stored in a 2D Array with 1s being walls, 0s being roads, and 2s being houses. There is a character that is not stored in the map but its position is always checked against the map ...
1
vote
1answer
526 views

Unity 2D camera drifts from player as speed increases

I have a dilemma that I did not have in XNA before porting my game to Unity. First-- my goal is to mimic Super Mario World 2's camera tracking in x. The camera tracks to 1 block ahead of the player, ...
12
votes
6answers
1k views

Seamless tilemap rendering (borderless adjacent images)

I have a 2D game engine that draws tilemaps by drawing tiles from a tileset image. Because by default OpenGL can only wrap the entire texture (GL_REPEAT), and not just part of it, each tile is split ...
2
votes
1answer
1k views

Dynamic 2d terrain loading / stitching in Unity [closed]

I'm currently working on a top down 2d game (in Unity 2d) where I'd like to build a huge terrain for the player to explore. My question is - do you have any good practices or ideas on how to chunk the ...
1
vote
5answers
386 views

What is this type of camera called?

I am trying to find a name like "perspective view" of how a camera like this is called: It is 2d and 3d at the same time. I'm having a hard time trying to find the name.
0
votes
0answers
250 views

Adding 2d hud/gui to a 3d game engine which has no 2d features

I have been following the 3d game engine tutorial series made by theBennyBox for a few months now, and have finally decided to create a game with it. My problem is that it is a 3d only engine which ...
1
vote
1answer
163 views

What's a clean way to find (up to) 3x3 squares within a 6x6 grid?

I have a 6x6 grid where every cell have a color property (simply integer value). Player can change one cell at a time to form rectangles of the same color inside of the grid. New rectangles can only ...
1
vote
1answer
177 views

How to correctly handle multiple movement key presses resulting in double the speed?

I am trying to implement acceleration and drag into my top-down 2D game. The player can move using the WASD keys. Acceleration works fine, but the way I handle the directional velocity causes the ...
2
votes
1answer
242 views

How do I make a sprite appear to sway with the wind?

I'm trying to find a method to simulate the effects of wind on various sprites in a side-view 2D scene. What relatively simple technique could I use for this? What I have in mind is to give these ...
1
vote
0answers
137 views

How to make 2D sprites from 3D models [closed]

Hi I'm making a top shooter game and I'd like to what programs are the easiest/fastest to make 3D models and sprite sheets ? Here is an example of I what I want to do ...
2
votes
1answer
896 views

Generating transformation matrix for 2D camera with pan/zoom/rotate

Question How do you implement a camera with pan/zoom/rotation for a 2d game? Is it acceptable to multiply together a series of transformation matrixes to generate a final transformation matrix that ...
-3
votes
2answers
134 views

what is the ducking ability? [closed]

In my game framework I have this property: canDuck : Boolean = true Determines whether or not the hero's ducking ability is enabled. What does it mean ? regards
7
votes
2answers
2k views

Constant 2D Bullet movement in a shmup

I've been following the pixelnest tutorial to make a 2D shmup (http://pixelnest.io/tutorials/2d-game-unity/player-and-enemies/). While working on this I've experimented with increasing the firing ...
0
votes
1answer
2k views

2d OnMouse(anything) Not working

So I want to be able to click on these targets and have them destroy themselves. Right now I have many OnMouse functions all just trying to print something for testing. For whatever reason it doesn't ...
2
votes
1answer
101 views

Issues with 2D Body/Limb system [closed]

In my game I have programmed Body and Limb classes. The Body is guaranteed to have an origin in the center of its sprite. The Body class has a List of children Limbs, each with their own offset. Every ...
1
vote
1answer
241 views

How to rotate vertices of 2D shape using a transform matrix?

I am making a top-down 2D game and am currently working on implementing improved collision using SAT. I programmed a Shape class with a Vector2 center that is its position in world space. On top of ...
3
votes
1answer
171 views

Should my GLSL Shader object/wrapper encapsulate loading/setting a VertexArrayObject?

I am working on a 2D game in C++, with a simple rendering layer over OpenGL. I have a wrapper for GLSL shaders and shader programs, these wrappers encapsulate shader objects into C++ classes and ...
7
votes
2answers
942 views

What kind of projection is demonstrated in this screenshot?

I want to know what projection is used in the following game: The game is Goodgame Empire.
4
votes
1answer
1k views

Is a game like Subway Surfers suited for 2D or 3D?

I imaginated a mobile game and now I'm getting doubts as to whether its possible for my idea to be developed in 2D. Here's a crude illustration of the game scene: It's pretty much like Subway ...