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.
2
votes
1answer
362 views
Calculating camera zoom value (top-down)
I need some help in 'camera maths'. I have a birds eye view of two characters. One character is static and the other can move. I would like the camera to always show both characters in full and, in ...
6
votes
1answer
630 views
For 2D tiled maps is all object and NPC data loaded into memory when the map is loaded?
I'm creating a text RPG in Java, but I think this applies for a GUI as well with regard to the data structure. Each Level is a tiled map. Each Tile object has an (X,Y) coordinate, and references to ...
2
votes
4answers
2k views
Scrolling background loop
I'm trying to scroll my background forever and so I'm using the background image twice. When the first one goes off screen, it should relocate to the end of the second one. However, there seems to be ...
5
votes
3answers
952 views
Android collision detection of a 3d object based on a 2d projection
I am writing a game for android. We have an orthographic view setup, but the characters (ships, projectiles, etc). The enemies / characters will be able to rotate about the x axis. The problem is that ...
6
votes
3answers
491 views
Represent planet surface in 2d
I'd like to make game, where one part is managing planet (building cities, factories, roads, etc.) but I'd like to avoid 3D - only what I want is nice 2d. But if I represent planet's surface as a ...
2
votes
2answers
1k views
blending alpha textures in gluOrtho2D
i'm doing a simple game/application with some minimal 2d graphics: png textures and ploygons with standard glVertex calls
my setting:
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0, w, ...
3
votes
2answers
2k views
How do you structure a 2D level format with collisions etc. in Java (Slick 2D)?
I am developing a game in Java. 2D Fighter, Kind of like the 2d flash game Raze(http://armorgames.com/play/5395/raze). I currently am using the Slick 2D game library and am researching how to ...
9
votes
5answers
3k views
What's a good 2D game engine or framework to work on right now? [closed]
Basically, I'm looking for a good, 2D game engine to build a platformer/contra-like shooter on to bolster (and when I say bolster, I really mean start) my portfolio.
I use the words "right now" in ...
4
votes
3answers
2k views
XNA - Moving Background Calculations
My question is relatively hard to explain(for me, at least), so I'll go one step at a time and just tell me in the comments if it's not clear enough.
So I'm making a "Defend Your Castle" type 2D ...
7
votes
6answers
778 views
Does one need normals for a strictly 2d Game?
I'm starting to learn OpenGL by creating a pure 2D game.
I have to decide on the format of the Vertices. Do I need a normal component? Or is this for a 2d component not needed?
My gut feeling says I ...
9
votes
4answers
744 views
Rendering Resolution Independent Text
I need a way to draw resolution independent text in my game. That is, I need to be able to zoom in on text and never see pixel artifacts.
Can anyone make any suggestions on how I could go about it?
7
votes
2answers
4k views
How do I use depth testing and texture transparency together in my 2.5D world?
Note: I've already found an answer (which I will post after this question) - I was just wondering if I was doing it right, or if there is a better way.
I'm making a "2.5D" isometric game using OpenGL ...
15
votes
3answers
2k views
How to procedurally (create) grow an artistic (2D) tree in real-time (L-System?)
Recently I programmed an L-system module, It got me interested further. I am a Plants vs Zombies junkie as well, really liked the concept of Tree of Wisdom. Would love to create similar procedural art ...
4
votes
1answer
340 views
Good book or tutorial for learning how to apply integration methods
I'm looking to animate a graph layout using edges as springs and nodes as weights (a node with more links will have a bigger weight).
I'm not capable of wrapping my head around the usage of ...
12
votes
2answers
3k views
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 ...
4
votes
2answers
574 views
Drawing territories border in 2d map
I'm programming a little web strategy game. In the country map I pretend to display each country with a national color. The issue is how to render the borders in a simple and efficient way. Right now ...
7
votes
4answers
3k views
Designing a flexible tile-based engine
I'm trying to create a flexible tile-based game engine to make all sorts of non-realtime puzzle games, just as Bejeweled, Civilization, Sokoban, and so on.
The first approach I had was to have a 2D ...
40
votes
3answers
7k views
Optimizing an XNA 2D game
Does it make sense to implement the logic to skip rendering objects outside the viewport or should I not care about it and let the Framework do it?
17
votes
7answers
5k views
Easiest, most fun way to program 2D games? Flash? XNA? Some other engine? [closed]
this is a post detailing my search for the most enjoyable way for a hobbyist game programmer to sweeten his free time with making a game.
My requirements:
I looked at Flash first, I made a couple of ...
5
votes
4answers
2k views
2D Platformer Collision Handling
I am trying to create a 2D platformer (Mario-type) game and I am some having some issues with handling collisions properly. I am writing this game in C++, using SDL for input, image loading, font ...
1
vote
2answers
2k views
How to Create a Grid for a 2D Game?
So I'm currently writing the engine for my videogame. I've almost integrated Tiled (I think) so I should have a map-creator here soon.
My question is, how do I actually make the grid? I'm really ...
9
votes
3answers
1k views
Tips for building an AI for a 2D racing game
I have a school project to build an AI for a 2D racing game in which it will compete with several other AIs (no collision).
We are given a black and white bitmap image of the racing track, we are ...
1
vote
1answer
194 views
2D Game Physics: How to evaluate when an accelerating ray is close to a point?
Given a ray in a 2D world at position p with initial velocity u and acceleration a how can I tell when it's within a certain distance r from a certain point.
9
votes
4answers
3k views
Drawing large 2D sidescroller level terrain
I'm a relatively good programmer but now that it comes to add some basic levels to my 2D game I'm kinda stuck.
What I want to do: An acceptable, large (8000 * 1000 pixels) "green hills" test level ...
2
votes
2answers
853 views
Projectiles in tile mapped turn-based tactics game?
I am planning to make a Laser Squad clone and I think I have most of the aspects covered. But the major headache is the projectiles shot/thrown.
The easy way would be to figure out the probability of ...
1
vote
1answer
1k views
Multiple Sprites using foreach Collison Detection in XNA (C#)
Back again from my last question. Now I was curious I use a foreach statement to use the same shot class. How would I go about doing collison detection.
I used the tutorial here on how to shoot a ...
12
votes
4answers
3k views
2D non-tile based map editor
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 ...
7
votes
3answers
3k views
How much is java used in 2d/3d indie games? (before/after Minecraft) [closed]
I wonder for my own use and curiosity, how popular is Java in indie game development ,
in 2d and 3d? Are there any good open/closed source games done in java?
6
votes
4answers
6k views
2D Platform Game Jumping
I'm currently writing a game in XNA for fun which uses C#. I have got my sprites loaded and when the character moves right he looks like he is running right and when he moves left he looks like he is ...
1
vote
2answers
2k views
Voronoi regions of a (convex) polygon
I'm looking to add circle-polygon collisions to my Separating Axis Theorem collision detection.
The metanet software tutorial (http://www.metanetsoftware.com/technique/tutorialA.html#section3) on ...
1
vote
1answer
1k views
J2ME character animation with multiple sprite sheets
I'm working on a J2ME game and I want to have walking animations.
Each direction of walking has a separate sprite sheet (i.e. one for walking up, one for walking right etc), I also have a static ...
7
votes
1answer
1k views
Tile-based 2D collision detection problems
I'm trying to follow this tutorial http://www.tonypa.pri.ee/tbw/tut05.html to implement real-time collisions in a tile-based world.
I find the center coordinates of my entities thanks to these ...
3
votes
3answers
593 views
What tool should I use for drawing 2D OpenGL shapes?
I'm working on a very simple OpenGL ES 2.0 game, and I'm not sure what tool to use to create the vertex data I need. My first thought was adobe illustrator, but I can't seem to find any info on how to ...
99
votes
6answers
15k views
How was collision detection handled in The Legend of Zelda: A Link to the Past?
I would like to know how the collision detection was done in The Legend of Zelda: A Link To The Past.
The game is 16x16 tile based, so how did they do the tiles where only a quarter or half of the ...
3
votes
3answers
2k views
Triangle - Rectangle Intersection in 2D
I had previously asked this for 3D but now I changed my strategy and would like to do the intersection in 2D.
The Rectangle is axis aligned and will always be in a fixed position, and has a constant ...
13
votes
2answers
1k views
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 ?
4
votes
4answers
2k views
What is a good practice for 2D scene graph partitioning for culling?
I need to know an efficient way to cull the scene graph objects, to render exclusively the ones in the view, and as fast as possible.
I am thinking of doing it the following way, having in each ...
3
votes
4answers
13k views
Android game scrolling background
I'm just trying to figure out the best approach for running a scolling background on an android device. The method I have so far.... its pretty laggy. I use threads, which I believe is not the best ...
1
vote
2answers
553 views
What are some good resources on creating and reading 2D game levels in Java?
Could some resources be listed in relation to the creation and management of simplistic, efficient 2D game levels, that are available for use with Java?
8
votes
3answers
2k views
TRON: Game A.I algorithm?
Lightcycles or whatever it was called like.
Given a 2d array representing the game map, where each element can be either 0 or 1 (0 representing blank space and 1 representing filled space), what is ...
6
votes
1answer
1k views
2.5D game development
2.5D ("two-and-a-half-dimensional"), 3/4 perspective and pseudo-3D are
terms used to describe either:
graphical projections and techniques which cause a series of
images or scenes ...
7
votes
2answers
3k views
2D object-aligned bounding-box intersection test
I have two object-aligned bounding boxes (i.e. not axis aligned, they rotate with the object). I'd like to know if two object-aligned boxes overlap. (Edit: note - I'm using an axis-aligned bounding ...
2
votes
3answers
894 views
Help comparing Cocos2d and Unity3d for this project [closed]
I will not go into details, but I would like to hear your opinions about this:
Essentially, my project will be a 2d game, with lots of complex levels, where some might be simple and others might be a ...
32
votes
8answers
12k views
How to learn 2d animation?
Where can I learn how to do simple 2d animation well? Or is it really just literally drawing every single frame of something in photoshop? Is there tips or tricks? Tutorials to help get started?
...
13
votes
2answers
3k views
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 ...
3
votes
1answer
371 views
XNA - Weird bug with 2D Sprite Rotation
I have a problem with my XNA Game, I have a function where I need my sprite to face towards an enemy, using this code:
Vector2 currentPosition = Position;
Vector2 nearestEnemy = ...
3
votes
2answers
1k views
2D game - Missile shooting problem on Android
I have to make a tank that sits still but moves his turret and shoots missiles.
As this is my first Android application ever and I haven't done any game development either, I've come across a few ...
3
votes
2answers
979 views
What are the advantages of a sprite sheet over an image sequence/flash timeline?
I've noticed sprite sheets are used more and more in Flash games and I don't fully understand what are the advantages over an image sequence/flash timeline - MovieClip.
I've read this related ...
3
votes
2answers
660 views
Spritesheets From Individual Images in Content Pipeline?
My main goal is avoid using an external program like SpriteSheetPacker.
I would like to just use sequenced PNGs and have the sprite sheets be made, updated, and saved automatically when I build my ...
0
votes
2answers
774 views
opengl memory issue - quite strange
I have heard that textures consumes lot of memory but I am surprised how much....
I have 7 textures 1024 16 bit each. And while I will run my app it consumes 57MB of memory.
I think that this is "a ...
