Tagged Questions

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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0
votes
1answer
179 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
votes
2answers
488 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
votes
1answer
164 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
259 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
390 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
197 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
131 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
257 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 ...
3
votes
1answer
641 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
255 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
317 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
69 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
533 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
659 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
259 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
422 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
297 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
531 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
173 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
415 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
1k 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
392 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
95 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
198 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
191 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
154 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
377 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
227 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
318 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
346 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
280 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
402 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
115 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
306 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
99 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
374 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
322 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
259 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
156 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
506 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
152 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
456 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
431 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 ...
5
votes
1answer
3k views

How to use modern OpenGL for 2D games?

I've found a plethora of "modern" OpenGL (3.0+) tutorials for 3D, but I have found next to nothing when looking for information on how to use it for 2D game development. How can I get started using ...
2
votes
1answer
1k views

Rotate image around a specified origin

I'm trying to rotate my Turret.png (small Gunhead with a laser in front) towards the mouses location on the screen. I tried just using my method for rotating projectiles towards the next step on their ...
-1
votes
1answer
234 views

Game Engine Design for the LWJGL [closed]

I'm about to begin on the engine for the game I am making. However, I am quite uncertain how I should design it. I have heard lots about threaded games, component and asynchronous systems. I'm ...