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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2
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3answers
159 views

Creating a unit selection box in Unity (2D)

I've been trying to get my head around how to create a selection box for a selected unit in a 2D top-down type game. When you click on a unit, a small box would appear around that unit based on some ...
0
votes
1answer
57 views

How to determine whether a given line intercepts another

I have a collection of lines: List<Line> _lines; Each has the properties: X1, X2, Y1, Y2 How can I determine whether any given line in the list (Line[n]) intercepts, at any point, any other ...
1
vote
3answers
305 views

Create random polygon shapes

I want to make a random shape made out of points. I want the points to create a polygon shape. Is there a clever way to create a random shape like this? Im thinking going throug X points and giving ...
0
votes
0answers
72 views

2D GLSL Lighting and Sprites

I'm trying to make a 2D game engine, and I really want to support ambient light as well as multiple point lights that you can define the color, intensity, radius, etc from uniforms in glsl shaders. ...
0
votes
1answer
89 views

Trying to add a feature to my (basic) level parsing algorithm - not sure how to (JAVA)

Right now this method goes through a list of GameObjects (e.g. JetPack, Platform) with their respective x and y positions in a text file called level1.txt: platform 840 280 platform 1130 280 coin ...
0
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0answers
47 views

Fake Lighting 2D Space Java

I have an image that I want to be used as the light. The white are should be drawn, the black should not. I need the light to be tinted to whatever color I pass to the light object. I have code ...
0
votes
0answers
22 views

How does collision detection work? [duplicate]

I was curious on how hit collision works in games. I know there is a simple method that gives every object in a 2D or 3D world a recengular hitbox that makes it easy to detect a collision, but when ...
4
votes
2answers
172 views

Hide some objects from the camera (fog)

I'm trying to implement a visibility representation in a 2D game ( no plains, no quads - plain 2D ) In the examples below I have calculated what the player can see using raytracing and added all the ...
0
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0answers
35 views

Game Loop Thread for different activities

First of all, sorry for my mistakes of language. I'm a noob of game programming in Android but I'm trying to make one using canvas and bitmaps. My game have two screens, the Title Menu and the Game ...
0
votes
2answers
78 views

Why does this simple if-statement that checks my main characters state never get called (Java/LibGDX)?

Been working on this for a while - basically I want my player to perform a front flip when he jumps (screen tap -> player jumps). I wrote the animation class Animator (extends Player implements ...
0
votes
1answer
550 views

In Unity, how do I create a drag and drop object?

I have a 2d scene. I want the player to be able to pick up an object, move it around the scene and drop it somewhere. I can't find any way to do this, and all of the resources for Unity are really ...
1
vote
1answer
95 views

How to deal with two different axes on isometric game?

Hi! Above is a visual of the problem I am having. My game has two different coordinate systems. You have the client, or the canvas, where the game is rendered - a standard coordinate plane; however, ...
2
votes
1answer
151 views

How can I create 2D, sprite-based reflections in HTML5 Canvas?

I'm trying to create simple reflections in a 2D, sprite-based game using HTML5. I'm looking to recreate an effect like the one you'd often see in GBA games, such as Pokemon Emerald and Mother 3: ...
0
votes
2answers
107 views

How does rendering with Swing compare to rendering with openGL?

[summary: Is the performance of Swing at least in the same dimension as openGL [through LWJGL]? If yes, what percentage would you give it? What possible other problems can I expect from Swing in the ...
1
vote
2answers
81 views

Simplify paths when a user builds

I am looking for some guidance on how to simplify my nodes on a path when a user builds on the fly. Imagine a path like this with a gap: Logically 3 nodes are required 2 connected one isolated. ...
0
votes
0answers
132 views

Alternative to a timer in a separate thread in a turn-based game

I'm making a 2d turn based game and I'm having some difficulties with the timer itself. 3 characters vs 3 characters, two players. A timer giving them a chance to preform acts within a set amount of ...
0
votes
1answer
94 views

Creating a separate renderer for entities in a 2D game

I'm making a 2D shooter game. As of now, every entity "draws itself", meaning every renderable entity has a draw function. I know it is better if rendering is handled separately, but how can I achieve ...
1
vote
2answers
157 views

How do I limit the rotation speed of a mouse-following object?

I am trying to make a 2D top-down game where player controls a spaceship. The spaceship (a rocket) is just a sprite following the mouse cursor with a fixed speed and is always pointing toward the ...
0
votes
0answers
294 views

2D Distortion shaders for water effect

I'm working on Unity, and I'm trying to improve my water. The water will be seen top down, and I want to apply a shader to it to make it better looking. I understand the concept of distortion shaders ...
7
votes
3answers
323 views

Unity2D tall grass

I'm using Unity to create a 2D top-down game. Everything has been great so far, but I have come into a problem that I fail to solve properly. I want to implement "tall grass areas" where part of the ...
0
votes
1answer
115 views

How to deal with different resolutions in a 2D game? [duplicate]

For example, you have a sprite of mario with a size of 20px x 20px. This sprite however was made for a game resolution of 1000px x 1000px. What if you want to provide a different game resolution as ...
1
vote
1answer
360 views

Problem with update/render in game loop (scrolling view, render interpolation)

I use SFML 2.2 and program a 2d prototype game (2d mario style where the camera follows the player). I am experiencing the buggy imagery during rendering, for example a chunk of vertex array blocks ...
0
votes
2answers
146 views

What level of use can I give to these third person IP based art assets?

I'm making my first game (2D), and while details are irrelevant it compromises lots of spaceships in and out of the screen. They are not the main character or controllable by any means (I don't know ...
1
vote
1answer
284 views

How to create water with ripples in custom places for top down game in Unity?

I want to make topdown row boat game with Unity. I want graphics to be simple (sprited), but the water must be "very nice" and realistic and it should reflect movement in it (paddles and boat movement ...
0
votes
2answers
143 views

Drawing image with an angle

Edit: the images below aren't supposed to have whitespace. I am just trying to show you that i am trying to create a rectangle from a 1x64 image, positioned as shown in the second picture I know how ...
1
vote
1answer
202 views

AI movement in 2D

I've got a prototype of a game I've been mocking up and found myself struggling to find a solution for AI movement in a 2D tile based game. Here's the issue: The player is free to roam throughout the ...
0
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0answers
59 views

'Bad' triangles when doing affine texture mapping

I am really clueless about what i must do. I wrote a function to do affine texture mapping, but i get in most situations 'bad' triangles. I really didn't want to ask this question as it probably is ...
0
votes
1answer
89 views

How to “piece together” an image in code, to render later?

I want to make a game in Dart and have decided to use the available port of the JS Phaser game engine. This will be my first time really making a game involving graphics so I guess I'll have a lot to ...
0
votes
2answers
123 views

Unity2D Collision Issue

I have a crate setup (in pic below) with a rigid body component, box collider and 3 circle colliders(they allow me to push the crate most of the time without getting stuck on the floor textures which ...
0
votes
1answer
59 views

Draw GUI.Button on certain position on a scrollable background

Problem is in a 2D game I have a large background around 2 screens wide. And on there I got 4 buttons placed on top of background all over complete width. Now when I swipe of move my mouse around I ...
-1
votes
1answer
84 views

2D bouncing formula doesn't work properly

am new to unity, and i am trying to create a bouncing ball, so i've did many researches about bouncing realted physics and i found a formula : Formula: -2*(V dot N)*N + V Where V is the velocity ...
3
votes
3answers
225 views

How to have coins burst out in random directions after destroying an object in unity?

I want coins to burst out of an obstacle in random directions after I destroy it, kind of like the rings in sonic. I have everything else done: the physics, bouncing, instantiating to coins. I just ...
0
votes
1answer
68 views

Coins don't show up in game in Unity

I have a 2D game I'm making with Unity, and I want the player to be able to collect coins that I place all over the game. I used the coin prefab with a 2D circle collider and an animation to make it ...
0
votes
1answer
113 views

Why my dynamically generated Sprites overlap?

I'm trying to dynamically generate scene representing chess board made from sprites. I'm using two textures for these: - pieces.png (taken from here: ...
0
votes
2answers
131 views

Unity question on OnTriggerStay() function

I'm currently working on a soccer game.I have a script for the ball that whenever the ball collides as trigger with the goal line,the ball will return to the middle point.But seems like the ball ...
0
votes
1answer
47 views

How to reposition a bouncing ball after it has passed through a surface

I have a bouncing ball which can collide with lines of a random slope. The ball passes through the lines a bit and I need to set the ball back some distance from the line. The ball (defined by ...
2
votes
3answers
221 views

Generating 3D-like effect

I'm making a 2D sidescroller game and want to give the blocks a 3D like effect. This way it looks like the player is walking on 3D blocks while walking on a 2D plane (thus having only x,y ...
0
votes
1answer
80 views

Perspective Projection - Drawing Lines

So I sort of understand the math behind projecting 3d points onto a 2d plane. It's just some simple dividing and multiplication of distances. However I can't seem to wrap my head around projecting ...
2
votes
2answers
82 views

AndEngine rotate all connected bodies

I have created below hexagon structure in Andengine with box2D physics extension. I want to rotate whole structure with respect to center when other ball collides with the structure using physics. ...
0
votes
1answer
107 views

How do I calculate the bounce vector of a ball hitting the starting point of a segment?

I have a ball (with parameters x, y, radius) that travels on the screen (with vectors directionX directionY) and can collide with a segment with random slope (with parameters startX, startY, stopX, ...
0
votes
1answer
239 views

How can I map regions on a world map image?

I am trying to use a map of the real world, but I need to have a way to break it down by countries and regions. Ideally down to a province level. I figure that I'd need to be able to define ...
0
votes
1answer
75 views

Intersperse 2D with 3D opengl

I want to be able to draw 3D objects as well as 2D objects in an openGL environment. Normally, I would draw my 3D stuff, disable the depth buffer and depth mask, then draw my 2D stuff. However, this ...
0
votes
0answers
68 views

Configuring touch input for a mobile game?

I'm trying to configure my game to take touch input from buttons but my scripts don't seem to be working. Here is the script for receiving touch input: using UnityEngine; using System.Collections; ...
0
votes
2answers
104 views

How to make a gameobject Scale up from another GameObject script

hi there im having a rought time with this code, trying to make a gameobject grow in scale from touching this one, and when a set amount of scale is reached destroy this game object ( the one who ...
0
votes
2answers
78 views

Unity2D Best way to determine degrees between two colliding entities?

I'm trying to determine the collision-direction between two objects. I'll be using this for various things such as creating blood-entities in a specific direction proportional to where the other ...
0
votes
2answers
265 views

C# xna/monogame ghost trail effect

I would like some know how can someone make an animation like this, in Monogame specifically.Since i am completely clueless on how to go around this i how should i go about this ? I hate asking ...
0
votes
0answers
34 views

How to rewind time on just the main character? [duplicate]

I have a 2D sidescrolling game and I want the character to be able to rewind time on him if he messes up. I don't want anything else to change, just the main character's position. Any idea how I can ...
1
vote
0answers
142 views

Xna 2d texture antialiasing

I've got a problem with drawing 2D texture in xna 4.0. My program generates terrain texture: The problem is in rough surface of my texture (dark-blue) that is generated by-pixel. Is there any ...
0
votes
1answer
94 views

Port sandbox flash game to Android and iOS

I'm want port my sandbox game to Android and iOS. Game written in AS3 (i'm use my simple 2d engine on stage3d). What do you recommend I use? Haxe + OpenFL MonoGame + Xamarin (C#), or other 2D engine ...
1
vote
1answer
44 views

Why is the Hiero font not coordinated to fit neatly in the display window?

I imported a font with Hiero and I draw the font like: font.draw(batch, "1", 0, 48); This is the resultant image: So the font it moved up to hit the bottom perfectly, but it doesn't touch the ...