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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2answers
287 views

Change AI steering behavior's direction to 8 directions

I am making a 2d soccer game, all players move in 8 directions, so I need to convert AI steering behavior(like arrive and pursuit) into 8 directions. Here are three example situations: Player(now is ...
-1
votes
0answers
99 views

What's wrong with my tileMap implementation? [closed]

I need to implement a 2d platformer and decided to use a tilemap. I found this tutorial and tried to implement the second solution. The text says: Decompose movement into X and Y axes, step one at a ...
1
vote
2answers
173 views

XNA blurring moving images

Why does XNA blurs the images which moves less than 1px in between two draws? It is quite annoying, because everything looks really blurry. Is there a way to disable it? I have tried to set the ...
0
votes
0answers
18 views

Making an object fly in an arc (a parbola) [duplicate]

I'm making a game where there should be a robot throwing ball-shaped objects at another robot. The balls thrown should fly in the shape of a symmetrical arc. Pretty sure the math-word for this is a ...
0
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0answers
80 views

Collision - Per Pixel and Rectangle Based, Combined

UPDATE:i found the error in my calculation the problem was that i needed to consider if the image is rendered flip or not to fix it just need to rub from the opposite side of the sprite I am currently ...
2
votes
4answers
2k views

How can I implement a directional melee attack?

I am attempting to make a top down game similar to the SNES Zelda games, in Unity 4.3, in 2D. When my character swings their sword, every enemy within a radius takes damage. I want to make sure that ...
-1
votes
1answer
166 views

Where can I share my game? [closed]

I am looking for places on the web to share my game. I'm relatively new to game development. Not looking to 'promote' my game or sell it. Just want to share it in places where there is a possibility ...
0
votes
1answer
22 views

Restarting a game be resetting an object [duplicate]

In a game I made, I want to restart the game when the players presses a button. I have an instance of a Game class, which is where most of the game happens. I though that I could simply initialize ...
0
votes
1answer
282 views

How to implement uniform grids

Up until now, I implemented all-against-all collision detection in my games. It worked fine. But I reached a point where implementing this kind of collision detection, makes the game run poorly, ...
1
vote
1answer
904 views

How to crop or mask a sprite to a specific shape in Unity (2D)?

I'm trying to do a procedural 2D terrain generation. I've managed to make the function to generate the points, and I've been testing/debugging by creating the terrain using a 2D polygon collider on an ...
0
votes
1answer
114 views

Game states vs calling new activities

I am trying to decide what the best method is to call "level complete-screen" and "game over-screen" in my real-time android 2d game. Currently I am using game-states and only updating my game when ...
4
votes
1answer
3k views

Multiple resolutions for Unity 2D Android game

I'm trying to target as many devices as possible by providing a consistent experience. So I'm trying to make sure the aspect ratio fits each device it's played on. After reading some forums and ...
2
votes
2answers
135 views

Isometric objects are mapped incorrect angle, but the map is fine. What am I missing?

I laid out my iso map and it's fine, but when I add my sprite actors they get located in the correct location but they are laying down not standing up. I tried rotating them on the z by 45 but then ...
2
votes
1answer
215 views

Unity Get corners of camera in world space

I'm making a 2D game and i need to get the corners of the camera in world cordinates. Is this possible in unity?
0
votes
1answer
165 views

How to use FrameBuffer objects (OpenGL)

I want to draw a 2D scene and after the scene i want to draw some light effects. When i draw some light, i create a FBO, draw in it and when finished with drawing, i want to create a texture where i ...
0
votes
1answer
261 views

XNA 2D Camera, zoom into player

My 2D camera follows the character fine without any zooming. However, when I tried adding a zoom feature using the Matrix.CreateScale(), the camera no longer follows the character properly. public ...
2
votes
1answer
130 views

2D lighting causes black rings to appear

A year ago I implemented 2d lighting in XNA using sprites. The sprites I used were created by placing a soft white photoshop brush on a transparant background. The result was this: (lights only) ...
1
vote
2answers
94 views

How can I compute the movement of an object along a parabola?

I am working on a simple 2D game. In the game, I have a 'robot' that throws a ball towards another robot, in the shape of a parabola. Both 'robots' have the same Y coordinate. The program knows the ...
8
votes
2answers
1k views

What is the difference between Unity's Sprite and Texture2D classes?

Unity has both a Texture2D class and a Sprite (with related SpriteRenderer). What is the difference between these two classes? Both represent an image, for 2D games should I favor one over the other? ...
2
votes
1answer
5k views

How can I programatically generate sprite instances in Unity?

I want to create a block-based puzzle game that generates blocks as they are required, however I cannot seem to find any good imformation on how to do something like this using Unity's new sprite ...
0
votes
1answer
186 views

How do you do FlashPunk-style animation in libGDX?

In FlashPunk, you can have multiple animations set, and then choose which one to play at any time, and it'll do it. Example: animatedSprite.add("running", [0, 1, 2, 3], 50); ...
0
votes
2answers
173 views

How can I regulate update and event frequency?

I'm trying to create a small 2D RPG-type engine using C++, SDL/OpenGL and Tiled. My little demo looks very similar to a Pokemon or Zelda game. I was curious how to go about regulating FPS and how ...
0
votes
1answer
127 views

How can I support a background more complex than a flat color?

I'm a beginner at making 2D games. Up until now, I always created my games with a black background, or a fixed color. This is because my sprites always have a black (or a solid color) background, and ...
2
votes
1answer
131 views

How do I rotate a bounding box together with a sprite?

I have a game object with a sprite that can rotate. It's a rectangle. I need its bounding box to rotate with it. How do I make sure that they can both rotate, but they're always both at the same ...
0
votes
2answers
291 views

translating canvas for rotating sprites that shoot

I am trying to align bullets to my different sprites guns (top down 2D for android). Right now Im using this method to draw my bullets: public void draw(Canvas canvas){ update(); ...
2
votes
2answers
131 views

Should widgets be part of a scene in a 2D game?

I'm in the middle of separating logic and drawing of a 2D game, i.e. I'm moving from scenes/entities that draw themselves to scenes/entities that merely store and update data, getting drawn by a ...
2
votes
1answer
126 views

How to smoothly track and draw player movement?

I am currently using C# XNA Framework to simply connect some development concepts that I've learned/used over the past few months. Right now I have a Web Service that keeps track of connected clients ...
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votes
1answer
977 views

No collision detected with 2D rigidbody

No collision detected with 2D rigidbody 0 I have a ZombieBoy with a circle collider2D and a box collider2D and a RigidBody2D . The player shots energy balls which has a Circle Collider2D and a ...
1
vote
1answer
170 views

Is setting the render target back to backbuffer supposed to take long?

I am creating a game in Monogame (XNA extension). I draw to a render target to display menu items for my game. Everything works fine, however... Whenever I set the render target back to the back ...
1
vote
1answer
325 views

What is difference between AndEngine's three Cameras

I am new to game development. After observing some AndEngine code snippets, I am trying to figure out which camera would be best suitable for my 2D game. Either it's BoundCamera, SmoothCamera or ...
1
vote
3answers
425 views

Calculating 2D Physics Prediction of Shot Angle with Moving Velocity of both targets

I currently have the math right to hit a moving target with 99% accuracy as long as I don't move. When I start moving the aim is nearly 80%, it should also be 99% accuracy because the target is moving ...
1
vote
1answer
105 views

Better way to handle ordering and visibility of renderable objects?

I'm just wondering whether there is a more effective way to handle the ordering and visibility of renderable components that fits into the design of my already existing engine. How I do it now: In ...
0
votes
1answer
120 views

Load all bitmaps at once or only when needed?

I am starting to get a pretty hefty amount of bitmaps in my 2d game for android. I load them all in 3 colors to save some memory but the thing is, I load all of them when "Start game" is pressed, even ...
0
votes
1answer
205 views

Scaling background without scaling foreground in platformer?

I'm currently developing a platform game and I've run into a problem with scaling resolutions. I want a different resolution of the game to still display the foreground unscaled (characters, tiles, ...
1
vote
1answer
165 views

AABB vs Rectangle

I'm trying to wrap my head around 2D physics and stumbled upon Axis Aligned Bounding Boxes, and I have a couple of questions regarding them. In all AABB structs I could find out there, people prefer ...
1
vote
1answer
139 views

Is the Key Bindings delay unavoidable in Java when pressing different directional keys quickly?

I've read just about every tutorial I can on why to use Key Bindings instead of implementing the KeyListener interface, including all the examples that show using a field to track the key event ...
0
votes
1answer
113 views

Java 2d game cross-platform compatability

I need to make a few small, simple 2d educational games primarily to help kids improve their reading. Drag & drop/matching words with pictures, spelling out words as well as maybe a scrolling ...
0
votes
1answer
143 views

Questions about networking theory in a 2d shooter game [duplicate]

So currently I am starting to work on a 2d top down space shooter game, and I have just got to networking. So far the client can draw a ship at a desired x, y and rotational coordinate with any set of ...
0
votes
2answers
107 views

very simple math destination and speed calculation

My player goes to (destinationX, destinationY) His position is: (x,y) and the player has an update event function update() { this.x = this.x + dx; this.y = this.y + dy; } what is the formula ...
0
votes
0answers
216 views

2D Sidescroller camera

I'm using OpenGL. For my tiles, I'm using a display list and I'm just using immediate more for my player (for now). When I move the player, I want to center him in the center of the window, but allow ...
-1
votes
0answers
51 views

Draw object to screen without being affected by rotation / zooming [duplicate]

I have a 2D game, with a camera that follows the main player. In the game the camera may also rotate the view around the player / zoom in or out on the player. Let's say I want to add a mini-map to ...
1
vote
1answer
104 views

Does a 2D Vector or 2x2 Matrix play any role in 2D Transformations?

I'm having trouble trying to figure out if a vec2 or mat2 class are used at all in transformations for 2D rendering. Vec2, apart from representing UVs, AFAIK, is relatively pointless in regards to ...
-1
votes
1answer
42 views

Movieclip to spawn in in a set perimeter

I like to make a movieclip randomly spawn in a set area. But theres a little more to it, usually you'd have something like the X pos set to something like 250 (say the centre) and the Y pos set to be ...
0
votes
1answer
211 views

3D rotation and movement of ball on a 2D plane

Here is a video of Amiga arcade pool game: https://www.youtube.com/watch?v=zTQIPFBUFIg I am making a similar game with C and Gtk+3.0 but I don't know how to show balls 3D movement on 2D plane! I ...
2
votes
3answers
194 views

How to manage game objects, npcs, items? [closed]

i'm making a small 2D game, designed the maps with Tiled, and adding "basic" world object/items/npcs/mobs to test it a bit and have fun. Now i have encountered a relatively huge problem, with further ...
2
votes
1answer
395 views

How to split a 2D sprite tile set into individual sprites?

I see a lot of sprite catalogs for games provided as single PNG image, like the one below. I'm interested if I have to manually create tiles from that, or if there's some program that can split it ...
0
votes
1answer
135 views

What size textures do I need for a 2D grid based game if my tiles are larger than textures I have?

I'm building a grid-based game for iPad, and for usability purposes I've selected my game grid to be built of 75x75 squares. However, so far I've seen that the majority of (free)texture catalogs I can ...
0
votes
1answer
83 views

Why is interpolation passed into the rendering routine when the position and speed are related to the update routine?

I've read this in several well known articles, including this one: http://www.koonsolo.com/news/dewitters-gameloop/ Under the Interpolation and Prediction subheading is the description of the ...
0
votes
2answers
75 views

Angluar movement

I'm making a little game where you are a spaceship and you fly around in 2d using the A and D key to rotate and the W key to accelerate. Now my problem is if i turn my ship it doesn't go into the ...
0
votes
1answer
57 views

Farseer Circle Body Problems, Please help!

I have created a circle body class, but in game my player body just passes through it. the circle will not move, only rotate. however when i create the circle body just straight up, raw in the game1 ...