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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1answer
110 views

Why do I get an exception when accessing my sprite members in this fashion?

I'm getting a NullReferenceException error on the line where I do new Vector2(...). I think the problem is with the variables I'm using even though they're working to control the player sprite, so ...
0
votes
1answer
286 views

Circle vs. Rect Collision accuracy problem

The blue ball is dynamic and is supposed to bounce off the walls, as well as the rectangle. Currently, the green rectangle is adding an invisible line to the scene, which doesn't let my ball go where ...
9
votes
1answer
7k views

Can Unity 2D be used to make pixel-art games?

I'm looking at the new 2D features introduced in Unity 4.3, and I think I might be missing something. To me it looks like they are designed for high-res 2D games, where scaling the sprites is ok, but ...
0
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1answer
167 views

Collision method for multiple circles

This is a bouncing ball program. There is 1 dynamic circle and 3 static ones. The static ones are obstacles for the dynamic circle, and the dynamic circle is supposed to bounce off of the static ...
0
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2answers
445 views

How to make different layers in a 2d game map

My question is this: How do I make a gamemap from the drawings on my spritesheet? The tutorial I have followed for making a java 2D game uses this technique to make a gamemap: in photoshop I create ...
6
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1answer
161 views

How should I attenuate sound in a 2D game where you can zoom in and out?

In my 2D game, I have some ambient sounds like the noise of a waterfall or the humming of a generator. However, it is not practical to play these sound all the time at full volume as in a large level ...
2
votes
1answer
238 views

Circle to Circle collision - bad accuracy

Circle1 (blue) is moving and its X and Y bounds are the screen (meaning it bounces off the walls). Circle2 (black) is stationary. Circle1(blue) is supposed to bounce off of Circle2 without ...
0
votes
1answer
328 views

Bounce off of objects

How do I make my ball bounce off objects on the screen? I'm having trouble detecting the collision, as well as calculating the response. The picture below is a good example of how the program should ...
2
votes
2answers
185 views

Finding tileX and tileY based on x and y (and vice versa) in isometric 2D view

I'm working on 2d Isometric game in ruby and gosu, although my problem is probably universal. My map is saved in 2d array: @map_tiles[layer][y][x] = tile_id Each tile is displayed on coordinates: ...
2
votes
0answers
130 views

What would be a good way to implement Zelda like attack? [closed]

I'm looking for ways to implement "attack" like Gameboy Zelda used. A method I came up with is: Create a rectangle near a player based on the direction the player is facing when every time attack ...
1
vote
1answer
227 views

Clearing an SFML scene with a partially transparent color

Is there way to clear a scene with a transparency (alpha) value, in pure SFML? I'm trying to clear with rgba(0,0,0,128) so the previous frame still partially shows through, which would create a ...
1
vote
1answer
591 views

2D Rectangle/Circle Continuous Collision Detection

I'm looking for a fast 2D continuous collision detection algorithm for circles and rotated rects. It needs to determine the time of collision. Both shapes may be moving at high speed, so the ...
0
votes
0answers
246 views

Design virtual resolution for 2D development in Unity

I came to Unity with Cocos2D-X experience in mind. In Cocos2D-X, I can choose a "virtual" screen resolution size to rely on the entire game during development and the game will automatically adapt to ...
0
votes
1answer
300 views

Rope Colliding with a Rectangle

I have my rope, and I have my rectangles. The rope is similar to the implementation found here: http://nehe.gamedev.net/tutorial/rope_physics/17006/ Now, I want to make the rope properly collide ...
1
vote
0answers
67 views

Vector or Raster? [closed]

Me and my co-developer are developing an overhead shooter and we're on the fence about picking between raster and vector graphics. I'm for vector, he's for raster. He's pointed out a very good point, ...
2
votes
2answers
516 views

2D game big background images for maps

Update: this question is general, not specific to Sprite Kit or a single language/platform. I'm toying with Sprite Kit with an idea to make a 2D side-scroller. Now the backgrounds for the maps are ...
0
votes
0answers
21 views

C# 2d array value check [duplicate]

I've managed to create a 2d array, then made it fill up with random numbers, like this: int[,] grid = new int[5, 5] ; Random randomNumber = new Random(); var rowLength = ...
5
votes
2answers
590 views

Rotating object around moving object/player in 2D

I am trying to implement a camera which rotates around the world around the player. I have found many solutions online to the task of rotating an object about the origin, or about an arbitrary point. ...
0
votes
1answer
239 views

Feasability of mobile 2D multiplayer RPG game with interactive bitmap background

I'm looking to develop a 2D multiplayer RPG game for Android, with a bird's eye view similar to that of zelda/pokemon. The game is very simple in all ways since my intent is for thousands of players ...
0
votes
1answer
357 views

Having a problem with texturing vertices in WebGL, think parameters are off in the image?

I'm having a problem texturing a simple rectangle in my WebGL program, I have the parameters set as follows: gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, textureImage); I'm ...
1
vote
1answer
273 views

2D fighting bounding boxes

I'm prototyping a 2D platformer/brawler game for uni and I'm having some trouble with creating collision/bounding boxes. This is most likely going to end up on a Vita so I do have some library ...
1
vote
1answer
475 views

Grid-Based 2D Lighting Problems

I am aware this question has been asked before, but unfortunately I am new to the language, so the complicated explanations I've found do not help me in the least. I need a lighting engine for my ...
2
votes
1answer
164 views

How to flip 2d skinned quadruped character?

just would like to know is flipping 2d skinned character with one of scale axis good way for left or right movement(flipping direction and animation)? Normal direction would change.(UPDATED) for ...
2
votes
2answers
364 views

Would it be more efficient to handle 2D collision detection with polygons, rather than both squares/polygons?

I'm working on a 2D game engine and I'm trying to get collision detection as efficient as possible. One thing I've noted is that I have a Rectangle Collision collider, a Shape (polygon) collider and a ...
5
votes
1answer
947 views

How do I create a 2.5d parallax effect?

I have a decent background in 3D graphics and programming, but I'm new to game development. I'm currently exploring different possibilities and I really want to make an RPG game. I was thinking about ...
1
vote
3answers
372 views

Bouncing ball isssue

I am currently working on the 2D Bouncing ball physics that bounces the ball up and down. The physics behaviour works fine but at the end the velocity keep +3 then 0 non-stop even the ball has stopped ...
0
votes
1answer
93 views

How can I compute a velocity proportional to the difference between two hand positions?

I'm working on a project with the Kinect SDK and XNA 4. I need take the position of the hands and draw a sprite over it. I'm was doing it directly and because of that I get a "trembling hands" effect. ...
0
votes
0answers
193 views

Best way to go about sorting 2D sprites in a “RPG Maker” styled RPG

I am trying to come up with the best way to create overlapping sprites without having any issues. I was thinking of having a SortedDictionary and setting the Entity's key to it's Y position relative ...
1
vote
1answer
1k views

android: How to apply pinch zoom and pan to 2D GLSurfaceView

I want to apply pinch zoom and panning effect on GLSurfaceView. It is Image editor, so It would not be 3D object. I tried to implement using these following links: ...
0
votes
1answer
184 views

Obtain rectangle indicating 2D world space camera can see

I have a 2D tile based game in XNA, with a moveable camera that can scroll around and zoom. I'm trying to obtain a rectangle which indicates the area, in world space, that my camera is looking at, so ...
0
votes
1answer
151 views

Isometric displaying two different images in different positions

I'm creating a simple Isometric game using HTML5 and Javascript, but I can't seem to get the display to work, at the moment i have 9 tiles that have X and Y positions and the player has a X and Y ...
2
votes
1answer
347 views

Drawing Sprites at Correct Z-Index without A Sprite Map?

My game is in HTML5 canvas, but I assume this concept applies to any language. In the past I've used a multi-dimensional array to keep track of sprite positions. Here is a simplified example: [ [ ...
0
votes
1answer
89 views

Using versors for movement

The context I was thinking of using a versor + velocity field to implement the "moving" part of a 2D game object. For example, if the player should move right I just set the versor to be: [1, 0] and ...
3
votes
2answers
224 views

Subdividing a polygon into boxes of varying size

I would like to be pointed to information / resources for creating algorithms like the one illustrated on this blog, which is a subdivision of a polygon (in my case a voronoi cell) into several boxes ...
9
votes
2answers
309 views

Falling Blocks and complex shapes

I currently have a simple Tetris-like game and have come across a problem I cannot solve. Unlike Tetris where there is a single falling shape, I have multiple, potentially interlocking shapes that ...
1
vote
1answer
323 views

What's the most memory efficient way to load a tiled map?

Currently I am working on a simple 2D platformer and I want to load a tiled map. What I've started working on is loading the tiles using a text file. My first question is simple: is a text file the ...
2
votes
1answer
253 views

Fine-tuning parallaxing objects in 2D games

I'm making a 2D platformer game and I'm having a hard time figuring out how to fine-tune parallaxing objects in-game quickly enough. Problem is I don't even know how to make it faster, so I'm ...
0
votes
1answer
380 views

How can I get animated bone's transformation in LibGDX?

I am trying to get transformation from a bone, but i can't, I exported just a animated armature with just a bone from blender, then I converted to .g3dj, so I just need the bone transformations so ...
-1
votes
1answer
104 views

Render white background with Graphics in Canvas

I am developing a game that I would like the background to be white, and it just sticks to being black. Here is my render method: private BufferedImage image = new BufferedImage(WIDTH, HEIGHT, ...
1
vote
1answer
293 views

Making a 2D TMX tile map

Should there be a specific link between the characters height as well as the tile size for the tile maps? That is if a tile is 32x32 does that mean that a character sprite has to be the same size? ...
-1
votes
1answer
95 views

Problem in animating polygon [closed]

Hi I am trying to move my black colored polygon downward. But As soon as I run my application my polygon gets invisible! I think My logic of move function is wrong. Can anyone help me out in figuring ...
1
vote
1answer
326 views

Project location to perspective fake 3D view

I am trying to implement a perspective view in a 2D soccer game, such like Nintendo World Cup. In this case, the soccer pitch will look like a isosceles trapezoid, but not a rectangle in real. Here ...
0
votes
1answer
296 views

Trouble with a modified parallax scrolling concept

I have a set of layers (each of them being a list of items) moving with different speeds as I mentioned here: http://stackoverflow.com/a/18962019/270197. Layers back in the scene move with slower ...
1
vote
1answer
239 views

Approaches to 2D Parallax

In a 2D scrolling platformer, what is the most efficient way or knowing which things with parallax depth should be drawn? The approach below describes trying to know which things are nearby so they ...
1
vote
1answer
155 views

generating complex maps in xna

I just wonder how does these maps like in this video are made. http://www.youtube.com/watch?v=TM6kcOau5oQ I was looking for some tutorials on the web but no success. All I found was some 2D Vectors ...
6
votes
3answers
471 views

Need ideas for an algorithm to draw irregular blotchy shapes

I'm looking to draw irregular shapes on an x,y grid, and I'd like to come up with a simple, fast method if possible. My only idea so far is to draw a bunch of circles of random sizes very near each ...
0
votes
1answer
148 views

Adding Functionality to a basic Java 2D Camera

Creating a little LoZ inspired game in Java here just to get into the feeling of things (learning CS at my school but the only teacher who's willing to help is travelling for 6-months, so I'm teaching ...
36
votes
5answers
1k views

Best Way to allow players to “Dye” images without losing color quality?

I am creating a 2.5D isometric (2D images) game. I want the players to be able to "dye" their armor, clothes, and other things. I find that grayscaling everything leads to losing out on some of the ...
1
vote
0answers
412 views

Weapon Class Organization [closed]

Im making a game and i want to organise my weapons, and im having a few doubts on not only the best architecture but also on how to use it properly: The First approach is to make a single Weapon ...
4
votes
2answers
396 views

Allowing a player to walk up and down slopes without resistance

I am trying to implement a platformer where both the player and the level are made up of arbitary polygons. One requirement is that the player can stand still on slopes, and walk up and down them ...