2D refers to two dimensional space where coordinates are represented with X and Y values.

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35
votes
2answers
4k views

How can I procedurally render irregularly shaped health bars?

The issue of the traditional rectangular or heart-based health bar is something well-understood and easily solved. But what is the accepted solution for more "creatively-shaped" health bars, like the ...
0
votes
1answer
60 views

How to calculate acceleration and deceleration

I have a car with speed x, and can accelerate at a rate of 0.5 m/s^2, and can decelerate at a rate of -0.1 m/s^2. Maximum speed is 20 m/s. To accelerate the car speed, at each frame I need to do: ...
-1
votes
2answers
213 views

How can I render 2D ropes in Unity?

I'd like to be able to render flexible lines, or ropes, as below: I thought about using a Line Renderer but it doesn't have the flexibility to render arbitrary curves.
0
votes
1answer
82 views

Enemy shake/vibrate when following character

I am using the arongranberg A* path finding project to create way points for one enemy to follow the player. However, the enemy vibrates back and forward by about 0.1 - 0.2 unit distance when moving. ...
0
votes
0answers
20 views

Simplifying grid based intersection checking to not need 16 checks from each corner

I'm working on an "underground prisons and fire breathing lizards" inspired CRPG. So far I have implemented a "path drawing" method to, well, show the grid cells that would be involved if one were to ...
0
votes
0answers
61 views

MonoGame RenderTarget2D mipmapping fades textures when zooming out

I recently ported my XNA game to MonoGame. Unfortunately, some of the textures are being faded when: They are scaled-down from 32*32 to 16*16 When the camera zooms out, the texture fades from ...
0
votes
0answers
115 views

Unity2D Script to Throw Object to hit the TARGET everytime?

Hi I got a script that fires object at a target. In this instance, I have an enemy that fires an object towards the player! But I am stuck how can I get the required force to always hit the target no ...
5
votes
1answer
210 views

What is best method for 2D pathfinding in procedural world?

I have been researching path-finding for 2D games and would like to create a system that allows A* to perform as best as possible over a near infinite world. This system is intended to manage not only ...
2
votes
1answer
134 views

What is the advantage of pixel coordinates for a 2d game?

From the Godot feature list: Work in pixels as your units, but scale to any screen size and ratio. And reading the documentation they also use pixel coordinates to update the position of objects ...
1
vote
1answer
124 views

How to get a pixel color from a specific sprite on touch (unity)?

I have a 2 layers of a different sprites. How can i get a pixel color from lower sprite? I know how to get touch and world coordinates, but i have no idea what to do next. Touch touch0 = ...
3
votes
1answer
66 views

Dynamically generating triangles from points

I'm working on 2D lighting. I have a list of points that have been calculated and when I draw lines from the light origin to the point it works. The problem is connecting the points into triangles. ...
0
votes
1answer
53 views

Hybrid App - Game Encyclopedia Image Asset

An in-game encyclopedia usually consists of entries and images for things related to the game. For example, pokemon's pokedex. Image of Pokemon, text description and so on. I've happen to encounter a ...
2
votes
2answers
102 views

How to display multiple textures with OpenGL without a texture atlas

I tried to dig into OpenGL a bit to use in 2D games (mainly because of shaders). There are multiple tutorials out there showcasing how to display and blend textures, and that's fine. But i haven't ...
1
vote
2answers
77 views

Achieve a red lighning effect in unity for a 2d game

Effect that im refering to: http://youtu.be/jaBY83WvS3M#t=05m36s How could I achieve this kind of red lightning/flashing/shadowy effect in Unity3D for a 2D game? I'm trying to think of a way but I'm ...
0
votes
1answer
45 views

Tile collision detection

Right. So I was making this simple game. The player is two tiles wide, and four tiles high. My current code is really buggy (it was better before my rewrite) Here it is: float newx = position.x ...
0
votes
2answers
45 views

Libgdx box2d bodies go through other bodies

I'm developing a game using libGDX and box2d. I am facing a problem that bodies go through each other... I'm moving the body using a TouchPad by setTransform. I think the problem is that I use ...
0
votes
0answers
60 views

Grapling hook in 2D platform game (C programing)

I'm new in the programming world and I'm studying programming for video games, and I'm trying to create a game for a class project. I need my character to throw a grappling hook into a specific ...
0
votes
1answer
69 views

How can I instantiate in the current rotation in Unity 2d?

Backstory I'm currently working on a 2D sidescroller/platform game as a hobby, and I just started recently. Followed a few tutorials and such I managed to wrote my own code for basic command like ...
1
vote
1answer
79 views

2D sunrise in Unity

I see a lot of guides on how to create sunrise in 3D space, but I can't find much information on how to do it in 2D. In 3D, you rotate a lightsource around itself, but in 2D, I need to move the object ...
3
votes
1answer
130 views

2D grid based placement (limited to 1 tile in each direction) in Unity

I've been trying to get my head around this for hours now, I hope one of you is able to help. I'm trying to make a small game (2D using sprites) that allows you to place blocks (tiles). That is ...
5
votes
2answers
111 views

Unity 2D graphical glitch cuts sprite diagonally

While making a game in unity, we found a graphical glitch that only happens on one of our mobile devices (a htc) where the screen will be oddly sliced by a triangle as shown in this image; I've ...
3
votes
1answer
55 views

Most Efficient Way To Get Objects In A Rectagular Area - Unity2D

First of all, if you know a better way to do what i want to achieve please don't hesitate to suggest your own method. What i want to do is classic area selection in RTS games, which player drags his ...
0
votes
0answers
25 views

Libgdx moving a body sequence

How can I move a body (box2d) to different points in an order. Like first it moves to 100,200 then to 200, 450 and so on? I've tried actions(and actor) but I can't get the point where the body is ...
3
votes
1answer
63 views

Super formula on shader

I'm using Shader-toy to experiment and try to learn a bit the shader science. As exercise I wan to replicate some of the wikipedia math plots. I've started with a Super Formula. What I want to ...
1
vote
1answer
141 views

In Unity, how can I modify the shape of a sprite?

I am new to Unity and programming in general, however, I wanted to know how to change a sprite's shape. I want to do this while the game is running, so I was thinking about removing a set of pixels ...
0
votes
0answers
30 views

Do I restart the service?

I have a long running service in my game, that consists of two threads. //MY SERVICE: if(userEnabledProcessOne) //Shared preference value that I'm getting from the settings of my app based on a ...
1
vote
0answers
111 views

Why do characters only move in 4/8 directions in top games? [closed]

In many top down games, like Zelda (4 directions) There are only 4 or 8 possible directions. Why is this? Is it a design choice or a technology limitation? I can't think of any reason that even ...
0
votes
0answers
72 views

Modern OpenGL and SpriteBatching

I tried to find tutorials regarding SpriteBatch done in Modern OpenGL 3.0+, but failed to find any good resources so far. So can anybody please provide me a good resource/tutorial to achieve ...
1
vote
2answers
119 views

Technical names for camera styles in 2D games

In 2D gaming, the camera movement method has a lot do with the play style of the game. I'm not super familiar with the technical terms for camera styles, so I'm going to describe them in hopes ...
1
vote
1answer
70 views

How do I deal with AABB sweep ghost collisions?

I've been trying to wrap my head around this for some time now. I wrote an implementation of AABB sweep collision detection. I though I understood the idea but it didn't work as expected. I rewrote ...
0
votes
0answers
48 views

Sub pixel Sprite jitter on moving platform

I have written a simple 2D platform game in C++. Coordinates are stored as integers, not floats. To facilitate smooth acceleration, the positions and velocities of the game objects are stored in sub ...
0
votes
0answers
51 views

Problem with collision detection also affecting collision resolution

Hi I am making a 2d scrolling beat em up, I am working on the collision with obstacles like drums and platforms. So far I have the player jumping and falling from platforms but having problem ...
3
votes
0answers
157 views

How can I interpolate between two frames of a sprite-based 2D animation?

For example, I'm looking to animate at 60 frames per second, but clearly my artist isn't going to hand-author 60 frames of art for every second of an animation clip and even if he could, it would only ...
-1
votes
2answers
80 views

Help with drawing a polygon with N sides [closed]

I am at university on my games development, and I have been given work to fill in an empty pixel plotter program using the methods they have supplied for it to teach us the algorithms used in 2 ...
0
votes
0answers
9 views

Creating a Shop in the Game for alternative skins Unreal Blueprint [duplicate]

I'm a beginner developer and I'm trying to create a game with some alternative skins. So when the player gets sufficient money, he goes to the menu, open the shop, buy the new skin and select to play ...
0
votes
0answers
106 views

How can I change the color of the default android drawable star?

I asked a question before and I got an answer to do this: Drawable drawable = getResources().getDrawable(android.R.drawable.btn_star); drawable.setColorFilter(Color.YELLOW, ...
0
votes
0answers
38 views

Create a new layout?

After the user gets to a certain score in my game, I wan't to display a medal next to the users name. Doing this pro grammatically will make the image disappear after the user leaves the app. How can ...
0
votes
2answers
109 views

Will scaling images at runtime impact my game's speed?

I have read the android developer guide to working on different screen sizes. My question is, if I only provide one image in the drawable file, and let android scale it for me, will it impact the ...
1
vote
3answers
135 views

Get the tile that my mouse pointer is currently over?

I want to get the tile that my cursor is over in my game. I did some googling though most of the examples we're in other languages/libraries and if they weren't, they didn't work for me because I use ...
1
vote
1answer
33 views

How to add images?

I was adding images after reading in the documentation: This means that if you generate a 200x200 image for xhdpi devices, you should generate the same resource in 150x150 for hdpi, 100x100 for ...
2
votes
2answers
91 views

Circle to Polygon collision response

I'm working for collision response for my 2d game. Character is represented by circle and obstacles are represented by Polygons(in my example it would be rotated rectangle for simlification). The ...
3
votes
1answer
61 views

2D deferred lighting calculations not working

I have the following code for my HLSL pixel shader. Modified from another post here on GameDev (Link), but I have a few problems with it: // calculate UV and get texture and normal. float2 UV = ...
-4
votes
1answer
98 views

How can I extract sprites from a SNES games? [closed]

Planning to use some sprites for a fan project but the sprites I want haven't been ripped yet; how can I extract them in a usable form?
3
votes
1answer
159 views

How to blur entire scene but a specific spot in Unity?

What I want is basically: A way to blur every object/sprite on the scene, but have a "blur-free" circular zone, that can move. And everything that's behind that circular zone won't have the blur ...
1
vote
1answer
143 views

Using .svg in unity(2D)

Creating resolution independent sprites is tough and memory consuming. How can .svg assets be used in unity for any kind of 2d game? What are alternatives to .svg that can be used in unity? Can ...
6
votes
2answers
915 views

Where to cast light/shadows in a 2.5D view?

I'm working on a tile-based 2D pseudo top-down/side-on game very much in the graphical style of Prison Archiect. More specifically, I'm referencing their style of drawing wall tiles where you can see ...
4
votes
2answers
75 views

Restricting Maximum Velocity in Space

I'm making a top-down 2D space ship game in which you rotate and thrust. I'd like to impose a maximum velocity for different engine types, meaning that a certain engine can only get you going up to a ...
1
vote
1answer
53 views

Repaint() in gameloop does'nt work [closed]

Recently I'm working on a PAC-MAN clone. I created 3 classes: StartingClass which extends Jframe and uses KeyListener Board which extends Jpanel Sparx which is responsible for changing the ...
1
vote
1answer
50 views

find Vector2 libgdx

I need to get coorinates of red point. Coordinates are just for example, it would be better to see the common formula. Found code like this, but it gains wrong result.() Vector2 o = new ...
2
votes
3answers
222 views

How to test if procedurally generated level for infinite runner can be passed?

I have a 2D infinite runner platformer game built in Unity 5, where the level procedurally generates itself. I need to check if it is possible to pass the holes on the level. How could I do that?