Flat two-dimensional space. Positions represented with `x`, `y` coordinates.

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5
votes
2answers
562 views

How to create a font from an image for a game?

I found a font in a free pack of sprite as an image: I'm wondering what would be the best way to use it in a game? Is there tools to create a font from this image? Do i have to code it myself? I ...
1
vote
2answers
487 views

XNA spritebatch.Draw: Which part gets colored by the color parameter?

Which part gets colored and how can I control it? I have a rounded block and my goal is to have the center filled with a certain color chosen by that parameter. Here's the picture: ...
0
votes
1answer
270 views

My logic in collision detection in diagonal code correct? [closed]

I made this code to detect collision from the diagonal(top left). I'm trying to find the problem on what I'm doing wrong. Is it necessary to have a diagonal collision for the wall? Player class: ...
-3
votes
2answers
2k views

2D Indie : From scratch, engine or maker? [closed]

I have been a game design/programming student for two years now, and made some little games using HTML5, most of them from scratch. I've come to a point where I am frustrated by the coding part : ...
4
votes
2answers
643 views

OpenGL: Filtering/antialising textures in a 2D game

I'm working on a 2D game using OpenGL 1.5 that uses rather large textures. I'm seeing aliasing effects and am wondering how to tackle those. I'm finding lots of material about antialiasing in 3D ...
-1
votes
1answer
574 views

How was traditional 2D collision detection/resolution being done? [closed]

Just out of pure curiosity, I'm wondering how classic 2D games of the 80s/90s (The Legend of Zelda, Super Mario, Warcraft, ...) approached collision detection/resolution. For some reason I can't ...
6
votes
2answers
709 views

How do I keep my character centred on screen?

I am making a game similar to Legend of Zelda: Link to the Past (top-down 2D action-adventure). I want the character to stay centred on the screen when he moves. Currently, whenever the player wants ...
4
votes
5answers
1k views

Implementing vector based movement in a 2d environment

Good evening. I apologize if the title is a bit vague, I really could not come up with anything better. I am currently reading a book called the nature of code and as a side project, I am working on ...
0
votes
0answers
250 views

How to render alpha channeled animated 2D sprites in OpenGL ES 2.0 [duplicate]

I searched, but I can't find specifically how to render animated 2D sprites with an alpha channel onto a 3D polygon, z=0, in OpenGL ES 2.0. This is just a basic 2D concept, but since I'm using, ...
4
votes
2answers
188 views

What's involved in resetting the graphics device?

I'm playing with XNA 4.0, VS2010. I've created a window (not maximized) and drawn some sprites. All is good until I resize the window, after which the sprites stop displaying or only partially ...
1
vote
1answer
557 views

2D Scrolling Background on XNA

How do I create a scrolling X and scrolling Y background without weird things happening like the player disappearing or not getting the offset correct? I have code at ...
3
votes
2answers
5k views

2D water shader similar to Limbo's effect

I'm wondering how I would go about creating a 2D water shader that is seen in this video http://www.youtube.com/watch?v=phChFfi4GOs The water effect that limbo uses is pretty awesome. I'm not so ...
0
votes
1answer
447 views

Issues with Sine Wave Generation and Rotation

I'm working on generating objects in sine wave that lets you specify parameters that are start x, end x, start y, and end y position. Below is the method that I used to generate the debris void ...
-1
votes
1answer
181 views

Breakout style ball-paddle bounce, error at corner

I am trying to make a breakout game where you have a paddle and a ball bounces around breaking bricks. The problem is that if the ball touches the corner of player it goes inside of player. I change ...
-1
votes
1answer
410 views

How can one make multiple movable images in OpenGL ES 2.0? [closed]

I was wondering, I've only seen examples of OpenGL ES 2.0 where people have used one or perhaps two images. I didn't see multiple images of where they each had independent movement. What if someone ...
2
votes
1answer
404 views

Issues upscaling pixel art with SampleState.PointClamp

I'm developing a 2D game, and I'm striving to create a nice blocky low-res appearance for the game, yet allow it to be played at variable resolutions. So, I've researched resolution independency and ...
1
vote
2answers
91 views

Mapping of positions on images in different frames

I am looking for a possibility to map different positions on a 2D Image which has different frames. Let's say I have an image, consisting of three frames, which shows a spaceship. The first frame ...
2
votes
2answers
349 views

Java Tetris - Matrix Rotations

I'm building Tetris in Java and am trying to use linear algebra to rotate a piece composed of 4 tiles. My friend was explaining the way to do it is: He said: "To clarify, you do need to rotate ...
1
vote
3answers
493 views

Splitting tileset into individual tiles

I'm trying to split a tileset (from here) into individual tiles. For debugging purposes I wrote some code to split the tileset into individual tiles and display them on screen, but some aren't being ...
4
votes
3answers
529 views

How do I make an arrow line up with a bow when rotating them?

I am trying to create a bow and arrow animation in which the player can drag downwards to increase the bow strength (see the image) and release it to hit a target. I can't get the arrow to align ...
1
vote
1answer
345 views

How to attach one sprite to another in LibGDX?

I want to attach one sprite to another so that it is always located at the 'bottom' of the other sprite, regardless of how the main sprite is rotated.
-2
votes
1answer
203 views

Spawning enemies outside of view [closed]

I'm trying to create a 2d shooter for Android. How do I spawn enemies "above" the screen, so that they "enter" the game screen instead of spawning at the top of it? I think I need to make a game ...
4
votes
3answers
2k views

Tetris - Rotations using Linear Algebra (Rotation Matrices)

I'm making Tetris in Java and am at the point of rotations... Originally I was hardcoding each rotation: if (direction.equals("right")) { if (shape.equals("Bar")) { if ...
0
votes
1answer
111 views

Are there shaders or at least shader like things in Swing?

Is there? Because I'm wondering if it supports GLSL, HLSL, or it's own shading language? I don't know much about Swing graphics. Does anyone know?
-1
votes
1answer
323 views

Refering to an object from an array in Java [closed]

In my game, the whole thing is based off of grids. So the map is a dual dimensional array of 32 (32 x 32 grid map). Now what I want to be able to do is to grab a grid and be able to access it and ...
26
votes
3answers
2k views

How does a 2D game like Zelda handle the character being behind buildings where only part of him is shown?

I'm trying to develop a simple Zelda-style game. I found this very useful topic How was collision detection handled in The Legend of Zelda: A Link to the Past? that I'm using as reference to develop ...
-1
votes
2answers
3k views

Developing a 2D Android game on Unity - Pros and Cons [closed]

Depending on your experiences, if you have created a 2D game on Android using Unity, was it painful? Have you ever said "I wish I have used X instead of Unity!"? Tell me the Pros, Cons and the name ...
0
votes
1answer
604 views

Pong horizontal movement algorithm

I was just wondering about the horizontal movement of a pong ball? What is the general algorithm used with this? The ball in my pong game just move vertically and I don't know about the algorithms ...
2
votes
1answer
401 views

Should my assets match my reference resolution?

I'm confused over supporting multiple resolutions in my 2D game. I'm currently working with a reference resolution of 1280x720. That means that all elements are positioned in a 1280x720 coordinate ...
8
votes
2answers
3k views

Java 2D game programming: Different approaches to make a game loop

I am new to Java game programming, but the more I read the more I'm confused, because I've seen several different approaches to make a game loop: 1. The standard approach, that uses the Timer class ...
0
votes
1answer
399 views

Why do I see this “ghosting” effect with my sprite in SDL?

I'm using SDL to create a 2D side-scrolling platformer, but I'm getting ghosting from the sprite. I'm not used to programming with graphics or SDL so excuse any stupid remarks I make. Here's the ...
3
votes
2answers
364 views

Distortion Effect

I'm trying to make a distortion effect for a space game. The idea is that the effect has a central point, and all nearby objects appear to swirl into that point. I've made a preliminary version and it ...
3
votes
2answers
867 views

Optimal OpenGL 2D Sprite Batching (Best Practice)

I am working on simple 2D engine using OpenGL (3.3+) for rendering and was wondering what the optimal method of sprite batching would be. I plan to put all sprites into one (or fewer) texture atlases. ...
1
vote
1answer
156 views

Object Detection

I'm building a collision system for my 2D game, broadphasing (sweep and prone + pair detection) works. But I don't know how to separate pickup objects, tiles and the player from each other. My ...
1
vote
2answers
578 views

Top Down bounds of vision

Obviously in a first person view point the player sees only what's in front of them (with the exception of radars and rearview mirrors, etc). My game has a top down perspective, but I still want to ...
5
votes
2answers
6k views

How can I find a projectile's launch angle?

I am making a 2d game in which units fire arrows at each other. I know the shooter's and the target's position and the initial velocity of the projectile. I want to know the angle the projectile ...
1
vote
1answer
1k views

Is using Box2D for simulating gravity “in space” a good idea? [duplicate]

I'm attempting to write a simulation of a solar system of planets in 2D space that are attracted to each other through Newton's law of universal gravitation. I know that it is possible to simulate ...
2
votes
1answer
418 views

How to do 2D Raycasting on a slope

I have a 2d platformer game where my slope can be set at any angle, so I've setup a middle raycast that points to the ground onto the player to handle the collision. This works perfectly fine on a ...
1
vote
2answers
1k views

Resolving 2D Collision with Rectangles

For about a week I've been trying to grasp the basics of collision, but I've been driven to the point of wanting to just give up on everything when it comes to collision. I just don't understand it. ...
1
vote
3answers
241 views

Creating an update “Tick” on tiles for simulating growth of plants

In my 2D tile based platformer I have added plants to be able to farm such as the simplest, grass, to other things like corn. Now each of these speacial tiles must be updated to show how much it has ...
2
votes
2answers
181 views

implementing a 2d looping using a physics engine

I am implementing a 2d mobile racing game. I have already implemented a 2d terrain using a physics engine (using edges). Now i would like to implement a looping very similar to the one in the old ...
18
votes
1answer
842 views

Which features belong to the engine and which ones to a game?

Right now I find myself implementing and testing new features of my 2D game engine by directly coding them into engine. Simultaneously I have a showcase game (with scripting support) which should call ...
0
votes
1answer
596 views

What available multiplatform languages are there available for 2D games [closed]

I was wondering what multi-platform languages are available that could be used to create and deploy 2D games, please note that im not asking which is the best as I do not want to cause arguments over ...
3
votes
2answers
84 views

Sperating axis test glitch help

I'm working on a pretty basic 2d platformer and I'm wondering if I could get advice on an issue I've run into. To keep collision detection simple I'm using AABBs and separating axis tests for ...
3
votes
2answers
339 views

How Does Ultima 7 manage different floors in 2d

In U7, you can move among floors without the function "tranport" the player to another place, as for example the first ff ones. How can it tell whenever the character is moving from floor z to ...
3
votes
1answer
2k views

Proper way to maintain Vertex Buffer Objects

I've started learning WebGL, currently I'm building a 2D lighting system, but there is some confusion going on inside my head. How the lighting works is based on this tutorial ...
1
vote
1answer
66 views

changing coordinate system

I'm currently trying to transform a system by scaling it on x and y axis and have some uncertainty. I have the general concept that scaling works as such: My original box has corners at (0, 0) and ...
0
votes
1answer
160 views

Collision and gravity problems

So this is an easy question. I need to implement gravity in my game but where I'm stuck is what variables do I need in my Entity object for the calculations and a good algorithm that I can use for ...
1
vote
2answers
843 views

Efficient types of 2D animation

I currently am doing art for a game being made (by me...) and started to think of multiple different ways of animating. The two I am currently debating, with myself, is single layered animation and ...
3
votes
1answer
286 views

Making up everything from single pixels

I recently saw a game which looked a bit like minecraft, but it was a RPG. The enemies in this game consist completely of voxels and if they die, they collaps and every single voxels falls down, ...