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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How can I identify feature regions in a procedurally generated world?

I'm building an Island. I use the classical heightmap solution : with a hill-building function, avoiding the corners of the map, I make altitude. Then, perlin noise give me some climatic variables to ...
16
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1answer
2k views

Procedural Generation of Infinite Level

What are some good approaches to procedurally generating an infinite 2d level? The level could be constrained in either dimension but not necessarily. The approach that makes most sense to me so far ...
15
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5answers
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How can I implement parallax scrolling into my 2D game?

Let's say I have three layers: a foreground, an intermediate-ground and a background. What is involved in using these three layers to create parallax scrolling?
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3answers
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Best way to store game-wide variables

I have an options Screen for things like Difficulty, Resolution, Full Screen, etc but I'm struggling to find the best way to store/obtain these variables at game time. The way I've currently decided ...
15
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5answers
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Quick 2D sight area calculation algorithm?

I have a matrix of tiles, on some of that tiles there are objects. I want to calculate which tiles are visible to player, and which are not, and I need to do it quite efficiently (so it would compute ...
15
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5answers
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2D tycoon games vs. 3D tycoon games

I fully accept that this could be just me, but I can't help but notice that I have never become addicted to any 3D tycoon or city-building games but I have become addicted to many older 2D tycoon ...
15
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4answers
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What are the pros/cons of using a 3d engine for 2d games?

What pros or cons should a beginner be aware of when deciding between a 2d game engine (like Slick2D/Flixel/FlashPunk) and a 3d engine (like Unity) for 2d game development? I am just getting started ...
15
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2answers
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Best way to mask 2D sprites in XNA?

I currently am trying to mask some sprites. Rather than explaining it in words, I've made up some example pictures: The area to mask (in white) Now, the red sprite that needs to be cropped. The ...
15
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5answers
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Where do I start if I want to independently learn game graphic design? [closed]

I want to learn how to create custom graphics, not use freely available resources. But I have been looking around for articles or tutorials on how to start with 2D game design in general, and I can't ...
15
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1answer
4k views

Terrain Generation for Tile-Based 2D Platformer

I'm currently working on a tile-based 2D platformer similar to Terraria in some ways, although I'm having difficulty with the terrain generation. I have some basics done, although they do not come out ...
15
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1answer
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How can I generate signed distance fields (2D) in real time, fast?

In a previous question, it was suggested that signed distance fields can be precomputed, loaded at runtime and then used from there. For reasons I will explain at the end of this question (for people ...
15
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1answer
634 views

Keystone Correction using 3D-Points of Kinect

With XNA, I am displaying a simple rectangle which is projected onto the floor. The projector can be placed at an arbitrary position. Obviously, the projected rectangle gets distorted according to the ...
14
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7answers
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For 2D games, is there any reason NOT to use a 3D API like Direct3D or OpenGL?

I've been out of hobby Game Development for quite a while now. Back when I did it, most people used Direct Draw to create 2D games. By the time I stopped people were saying OpenGL or Direct3D with ...
14
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2answers
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Creating an electricity/lighting/tesla coil effect in a 2D XNA game?

I'd like to create beams of electricity between two points very similar to this video: http://www.youtube.com/watch?v=eMJ8-56L3Lc. The effect is so dynamic, with varying lengths and pseudo-random ...
14
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5answers
647 views

How to tie a bullet release with a firing animation

Lets say you have an animation that you want to happen when firing a bullet. How would you get the bullet to show up at the end of the animation. The only thing I can figure out is to know the time ...
14
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4answers
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Real time shadow casting in a 2D isometric game

I'm writing a small 2d isometric engine in C++ and I'm trying to implement real time shadow casting. I followed a simple approach described on this page and here is the result (light is located at the ...
13
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6answers
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Creating a seamlessly looping 2D multiplayer level?

A discussion came up recently about how to create a 2D side-scrolling multiplayer game that can have an looping level design (Think of Starbound and how their worlds are looping). I thought the ...
13
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4answers
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Should I learn 2d game development before 3d?

I'm an iPhone app developer. I want to get into iOS gaming. The question is-should I start with learning 2D like Cocos 2D or Corona SDK before learning 3D gaming like Unity? I'm more interested in 3D ...
13
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2answers
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Wall Jump for 2D Platformer

I've been looking for a way to implement wall-jump in my xna game, but I can't find any information about it, can someone could someone please help me out ?
13
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2answers
326 views

Ensure house map maze with lifts can be solved?

In my game we see the floors of a house from the side, and the hero can take lifts -- a lift either goes up (to the next lift upwards), or down (to the next lift downwards), depending on the arrow as ...
13
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2answers
1k views

How do you handle uneven tiles while rendering a tile map?

Here is what I want to do with my tile map that I am unsure of. As you can see the top walls are way larger then the bottom and side ones (this is also an issue with my corners which are odd shapes ...
13
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2answers
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OpenGL ES 2.0: Setting up 2D Projection

This article describes in general, how to draw sharp OpenGL 2D graphics, using fixed function pipeline. http://basic4gl.wikispaces.com/2D+Drawing+in+OpenGL Because OpenGL ES 2.0 has some ES 1.x ...
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2answers
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In a 2D platform game, how to ensure the player moves smoothly over sloping ground?

I'm developing a physics engine for a 2D platform game. I'm using the separating axis theorem for collision detection. The ground surface is constructed from oriented bounding boxes, with the player ...
13
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1answer
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How are “2.5D” art assets created?

By "2.5D" I mean the art style in games such as Roller Coaster Tycoon, Age of Empires 2 or Fallout 1 and 2: Everything in the games appears to be created with a "pixel art"-like tool. Am I correct? ...
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2answers
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2D Planet Gravity

I'm trying to make a simple game where a spaceship is launched and then its path is effected by the gravity of planets. Similar to this game: http://sciencenetlinks.com/interactives/gravity.html I ...
13
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4answers
576 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 ...
13
votes
1answer
858 views

Making Procedurally Generated Top-Down Landscapes Interesting

I'm working on a game with a procedurally generated world. Ideally, I'd like to generate landscapes as beautiful as Minecraft's worlds are. Minecraft has chasms, and waterfalls, and mountains, and ...
12
votes
5answers
4k views

Examples of faking 3D

Does anyone know of any good examples of 3D being faked in 2D (not necessarily code, but games I could look up)? The player has the perspective that they are going 'into' the screen and things are ...
12
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4answers
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Curved movement between two points

What is a good technique to enable an object to move between to points in a nice curved motion? The end position could also be in motion, such as the trajectory of a homing missile.
12
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5answers
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2D Level design/editing/saving questions

I thought about making a simple 2D Sidescroller game like SuperMario. Then i wondered about how to save, load or create the levels for the game. The first thing i thought of was drawing a simple ...
12
votes
2answers
878 views

Should I be using spritesheets, because of or despite of my vast number of images?

I am developing a 2D game, and I have a lot of sprites. I used 3D animations and models to render into 2D, to give them that "Fallout" or "Diablo" look to them. It is also easier than drawing by hand, ...
12
votes
2answers
982 views

Could I be going crazy with Event Handlers? Am I going the “wrong way” with my design?

I guess I've decided that I really like event handlers. I may be suffering a bit from analysis paralysis, but I'm concerned about making my design unwieldy or running into some other unforeseen ...
12
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2answers
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Are high powered 3D game engines better at 2D games than engines made for 2D

I'm a software engineer that's new to game programming so forgive me if this is a dumb question as I don't know that much about game engines. If I was building a 2D game am I better off going with an ...
12
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4answers
14k views

Best Way to Create A Map for a 2D Game?

I apologize for the subjective "best" keyword. My friend and I have started creation of a 2D adventure game. It will be top-down in the style of pokemon or zelda (just the perspective). We have been ...
12
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1answer
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In platformer games, what are “hole in the ground” obstacles called?

In most jump and run games, holes in the ground are common obstacles: You need to jump over them, or you'll fall down and lose a life. It would be helpful to know for documentation, variable naming ...
12
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3answers
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Fastest way to render lines with AA, varying thickness in DirectX

So I'm doing some DirectX development, using SharpDX under .NET to be exact (but DirectX/C++ API solutions are applicable). I'm looking for the fastest way to render lines in an orthogonal projection ...
12
votes
2answers
826 views

XNA: Questions regarding games architecture

So I've finally got around to playing around with XNA and have been toying around with making a 2D game (I have a bunch of art assets from a friend who developed it on iOS) A lot of things seem to be ...
12
votes
4answers
4k views

2D non-tile based map editor [closed]

I am currently developing a relatively simple 2D, topdown oriented adventure game for the iPhone and was wondering what would be the easiest way to create the maps for my game. I figured I would need ...
12
votes
1answer
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How can I create gradiented Fog of War?

I'm creating a top down 2D RTS game for educational purposes. Currently, I'm really just copying Starcraft's design/ideas. I've decided I should probably implement Fog Of War too. My expectations: ...
12
votes
1answer
444 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 ...
12
votes
4answers
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How do I calculate rotation caused by bounce friction?

Following on from my previous question: I have the ball quite realistically bouncing from surfaces it hits. Now I'd like to make it spin from the friction of the hit. Showing this is simple enough: I ...
12
votes
6answers
568 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 ...
11
votes
2answers
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Is there a good way to get pixel-perfect collision detection in XNA?

Is there a well-known way (or perhaps reusable bit of code) for pixel-perfect collision detection in XNA? I assume this would also use polygons (boxes/triangles/circles) for a first-pass, quick-test ...
11
votes
3answers
698 views

2d top-down map: normalisation or not?

I am an absolute beginner with game programming, should this question be poorly formulated, be aware it was not sloppiness by my side, but lack of game programming experience. The game I am planning ...
11
votes
2answers
862 views

How do I create a World Healing Wave effect?

I want to change my dark and depressing background to a happy grassy background, in real-time, such that the happy background is shown in a radius around a game character. A forcefield of happiness, ...
11
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1answer
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Tile sizes in 2D games [closed]

While developing a small game using tile-mapping method a question came to my mind: I would develop the game on Windows but wouldn't exclude adapting it to another platform. What size(in pixels) ...
11
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3answers
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Faster 2D Collision detection

Recently I've been working on a fast-paced 2d shooter and I came across a mighty problem. Collision detection. Sure, it is working, but it is very slow. My goal is: Have lots of enemies on screen and ...
11
votes
2answers
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What should I worry about when changing OpenGL origin to upper left of screen?

For self education, I'm writing a 2D platformer engine in C++ using SDL / OpenGL. I initially began with pure SDL using the tutorials on sdltutorials.com and lazyfoo.net, but I'm now using SDL to ...
11
votes
5answers
841 views

What is a suitable input method to use for a 2D platformer on a touch device?

I am creating a 2d platformer game like Super Meat Boy in which precision of movement of my lead character matters. I am using libgdx. The keyboard controls on the PC work precisely, but when it comes ...
11
votes
4answers
4k views

Vehicle physics with skid

How would I go about creating vehicle physics for a car that can loose traction? I want it to seem like the driver has a flat foot, so when you press the gas, they cars driving (rear) wheels loose ...