# Tagged Questions

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

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### How to correct this issue with a top-down aiming angle in Unity - 2D?

I'm trying to build my first project and I'd like some input for a math correction. The game is a top down 2D shooter, a bit like the iconic "chaos engine" from SNES. The issue is that either the ...
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### Unity 2D C# Enemy Attackng Ai issue

Ok to be specific, both of my enemies will continuously play their attack animation even when it is false. I don't understand what I am doing wrong here :( void OnTriggerEnter2D(Collider2D other){ ...
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### Drawing a level in SFML (C++)

So in an attempt to move out of the console environment I have set up an SFML poject in Visual Studio. I am currently trying to draw a stage from a vector within a vector (Matrix?), and the results ...
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### Unity 2d sprite repeated as background

I'm a web developer with over 12 years of experience and I'm moving my first steps in game development in the latest days. Specifically I'm playing with Unity and trying to understand how it works and ...
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### Improving bouncing logic - Atari breakout clone

I'm creating an Arkanoid clone using Haxe and Openfl. I'm thinking the bouncing algorithms could be improved. But I'm not sure how to handle those. I was hoping you guys could help. private ...
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### How to keep a rigidbody on the ground going up/down a slope? (Unity 2D)

I'm not sure if this is possible, but Im working a 2D project to has randomly generated loops (imagine a sin or cos graph). I have a 2D character (a quad for now). I want my character want to ski a ...
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### How to achieve 2D ski movements similar to Alto Adventure?

I'm trying to achieve 2d movement similar to Alto's Adventure with Unity 2D. When grounded I want the character to slide alone the terrain parallel to the slope, but I want to be able to freely rotate ...
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### How can I make an animation in LibGDX?

In my game the player is running away from enemies and when he can't keep up the speed anymore I want the enemies to fade in from the side of the screen as the player is still running as show in this ...
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### How to find a point of taking into account the distortion of the projection

I can not find the material that will help me to implement the algorithm of coordinate transformation based on the distortion of the projection. I am creating a code recognition algorithm (similar ...
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### Resolving 2D AABB collision problem

I'm adapting the collision resolution code from learnopengl.com for my own engine and since this my first time doing this, I have a problem with how the player position is being modified by the ...
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### How do you create a camera with target-focus behavior in Java?

After making some progress in my game, I was looking around for camera scrolling methods to use for my TDS game and found one that I thought would work well for it. This is an example of what sort of ...
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### How to use touch screen for movement instead of keyboard narrow keys

I wrote this code and run the game on my desktop, now I need to build this game for android and I need to change to touch to move the player, what it should be changed in the following code and what ...
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### How does zooming in affect collision detection?

So i'm pretty new to DirectX, currently going through some tutorials to get an understanding of it. Now that i'm getting a small grasp on graphics programming, im just wondering how simple AABB ...
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### 2d vector flips during rotation

I have a 2d game (C++ and SDL) and I want the player object rotate to follow the mouse. The player object and the mouse location are both stored in 2d vectors. In order to have the player's rotation ...
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### How to make this vector field animation

This screenshot is from Windows app called MyRadar by ACME AtronOmatic LLC. I found their wind direction animation to be very visually appealing and was wondering if anyone knew how to create this ...
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### How to handle interaction with the map in a 2D-RPG-typed TileMap?

Sorry if this is a long post, but I'd like to explain the context before asking my question ^^" I'm currently working on my "first" game (the more advance one, at least). It'll be a 2D-ARPG where the ...
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### Resizing a procedurally generated arc mesh

I have a script that generates a mesh representing a 2D arc. This arc is generated when the game starts based on a size (radians), width, etc... I would like to know if there's any fast way to resize ...
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### Top Down Bullets will not move

I have a top down shooter. The player can move in the primary 4 directions, and follows the mouse for rotation. When I shoot, the bullets never leave the player, they just spawn on top of the player ...
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### 2D circle against a corner change in direction

I have a 2D Ball that might go against a wall. If the Ball goes against the wall perpendicularly, it will just invert its direction (assuming no air resistance and no bounces that should make its ...
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### How to fill a canvas with triangles that are seemingly random?

Given a canvas say, 1000 X 1000 unit. I would like to fill the canvas with triangles. The triangles can be of any type right angle, equilateral...etc. To avoid big chunks of triangles lets say all ...
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### Shooting Projectiles

I am using cocos2D-x and am trying to achieve the effect of enemies going past and shooting projectiles at the player who is moving around the screen. I am using the code below, which is based on this ...
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### A single libgdx gamescreen with pop-up menu, getting ready, hud and game over?

Is it possible and practical to have only one screen, like a GameScreen class, where the menu, getting ready (plus instructions), hud (only score) and game-over screens can pop-up when needed. Can I ...
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### How can I add holes to a sprite? [duplicate]

I'd like to find a way to add holes caused by a 'bomb' to my floor sprite, a bit like what is in this game here. Basically there is a sprite (the green floor) and another sprite (the bomb) that ...
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### LibGDX Gravity and Jumping

I'm trying to implement gravity and the ability for the player to jump in my 2D LibGDX game. At the moment, I have two handlers: One for gravity and one for keyboard input @Override public boolean ...
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### What's the best way to store tiles' infos in a 2D table?

I need to know what's the less time / memory consuming way to store the infos about each tile in a 2D table. The first thing that came to my mind was creating a table holding the infos, and then ...
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### Unet 2D sync problems

I've studied Unet but I still can't get it to work right :( I have 3 problems. The first: I can't force player 1 to always spawn from a specific spawn point (and same with player 2). Therefore I've ...
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### What is the most efficient way to store world data for a 2D tile game? [closed]

I'm working on a 2D tile based survival game for my programming class and as I was working on GUIs I realized that I would need an efficient way of storing and recalling not only the tile data and ...
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### How i can make better jump to my game? - C++ SFML

So, I ask question about my 2D game, actually it is not game, but it is something like poor game. Well i made moving system and now is time to make jump. I made some kind of gravity with tutorial but ...
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### How can I connect multiple explorable regions into one large map?

I am planning a 2-D science fiction game involving spaceships. A major thing that I am having trouble figuring out is how to create a 2-d array of smaller maps that the player can explore. My ...
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### 2D Sprite batching in OpenGL: How to send transformation data to GPU

OpenGL newbie here. So I'm trying to implement sprite batching to draw ~100 sprites per draw call. I've created a VBO that contains texture coordinates, vertex coordinates, color data (for tinting), ...
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### PYGAME: When I release two directional keys together the player keep moving

I did the code this way to avoid the player to stop if a press two directional keys together making the movement more smooth. It works well but when I release two keys or more together the player keep ...
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### Tag for Moving platform

My character is not sticking on the platform when jumping on it but I don't know why. Here is the code: void OnCollisionEnter2D(Collision2D other){ if (other.transform.tag == "MovingPlatform") { ...
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### Faking 3D in a mostly 2D game [duplicate]

I want to create a sports simulation game, something along the lines of Championship Manager (if you're not familiar, you can check out https://www.youtube.com/watch?v=t2FlFWP3K28). It's essentially a ...
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### Unity 2D, how to turn a bool true, after a set amount of time?

I have an enemy working to damage the player when they stay in collision for too long, at the moment, the enemy will attack about 30 times per second, however I want there to be a delay between each ...
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### Unity, how can I shoot when I touch the Box Collider

I want to change the Computer Input to Mobile Touch Input, if I press Space Button it shoots but how do I change this [Code] to Touch Input ? I want it to have it into void OnTouchDown() but what do ...
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### Is it possible to use Java as a scripting language in unity? [duplicate]

I wonder if its possible to use Java as a scripting language in unity to create a basic 2d game?
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### How can I make cars drive navigate an intersection without colliding?

I'm trying to create a 2D game with a traffic intersection: My car game-objects need to pass through the intersection without colliding with each other, and without stopping, if possible. How can ...
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### Create a game from scratch [closed]

I'm thinking in creating a simple 2D game to start learning something, but I don't know the best language to start. I know this can be a bad question, but I just know the basics of C# and a little bit(...
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### Can't read input from keyboard

I'm new to game dev,and I just trying to create my first game,a simple pong game.But i can't handle the keyboard input. This is what i got : const Uint8 * keystates = SDL_GetKeyboardState(NULL); ...
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### Top down 2d orthogonal view with 3D elements (Unity)

I've decided to give Unity a go with my project. I want to create a 2d RPG perspective world, but with elements of 3D mixed in. So for instance, I think I might make trees and grass 3D, for this to ...
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### How to efficiently move in Unity2D? [duplicate]

If i want to use Physics in Unity2D what should be the most efficient way to move the object without interfering physics? 1. Transform.position 2. Rigidbody.Velocity 3. Rigidbody.addForce 4. ...
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### Doubts on player movement strategy

What I want to achieve is the player moving to the touched position on a 2D grid-based game, stopping at the last reachable spot if the target position is unreachable. What is the strategy usually ...
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### How do I structure code that triggers story events at certain places?

I am planning to make a small game with a story that I have thought about for some time now. I am trying to decide how to handle stuff like if the character walks to this hitbox then a guy will come ...
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### How to “properly” display a 2d sprites in a 3d environment?

I would like to show "the classic" missile lock viewfinder (the target symbol) of a war aircraft. So the target symbol must follow the enemy, and became red when "lock" it. So i thought simply to ...
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### How to make expanding ring with constant thickness?

I need to generate this burst or (donut-shaped) pulse. I'm having a difficult time how to generate such shape. At first, I was thinking of scaling the image but that didnt work out because the line or ...
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### Making my game scalable? [duplicate]

I'm quite new to games development and just recently I've made my first Java platformer. I've been using Graphics2D to draw my spritesheets, but I've heard this method isn't very good in terms of ...
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### How do I trigger just once and not multiple times if I the Player enters the Trigger? [duplicate]

I wanna trigger just one time and not multiple times. I have a Health System and I want that the Player takes damage from an GameObject if he enters the Trigger but it directly triggers like 65 times ...