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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1answer
30 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
69 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
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0answers
68 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 ...
3
votes
0answers
91 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
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1answer
86 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 ...
0
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1answer
58 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
135 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 ...
0
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0answers
25 views

Is there a successor to Farseer for C# 2D physics? [closed]

I'm currently relying on Farseer Physics 3.3.1 and was recently considering to upgrade to 3.5, but it appears that the project has been abandoned by its author - which makes me a little insecure on ...
1
vote
1answer
107 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
3answers
117 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 ...
0
votes
1answer
127 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
35 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
50 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
56 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
27 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
50 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
154 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
52 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
28 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
51 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
39 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
186 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
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1answer
48 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 ...
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2answers
43 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
56 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
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1answer
84 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
60 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 ...
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0answers
22 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
1answer
35 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
49 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
131 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
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0answers
120 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
38 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 ...
0
votes
1answer
85 views

Mesh Generation In Code [closed]

My camera looks like this: I am trying to add 2D polygons to the screen based on the percentage that they take up of a 1920x1080 pixel canvas. Therefore, I calculate this and then use ...
0
votes
1answer
37 views

Raycasting on Z in 2D

I'm making an isometric game in Unity. So far I have managed to render a diamond shaped board, with tiles that are aligned on the x and y axis (and the camera looks down the Z axis). I am spawning ...
7
votes
1answer
444 views

How to implement this kind of ripples with a GLSL fragment shader?

So I have already implemented the reflection part: uniform sampler2D texture; uniform vec2 resolution; uniform vec3 overlayColor; void main() { vec2 uv = gl_FragCoord.xy / resolution.xy; if (uv.y ...
-1
votes
0answers
26 views

Moving from point A to B optimalisation [duplicate]

Here's my abstract class for movement: vector2d normalize(vector2d v) { auto a = sqrt(dotProduct(v, v)); vector2d r; r.x = v.x/a; r.y = v.y/a; return r; } ...
2
votes
2answers
146 views

Movement on objects in 2D tile/grid based game

This question is an addition to both of these questions: Boat passing under a bridge in a 2D tile based RTS How to handle slopes/bridges in a 2d grid turn based strategy game While I get the idea ...
3
votes
1answer
615 views

Why would it be faster to render using multiple canvas elements?

This video suggests that rendering using multiple canvas elements helps performance. How does this work? The idea was to use one for the player, one for the enemies, another for the background, ...
0
votes
1answer
50 views

Can't play animation from script in unity

I'm making a 2D sidescrolling game in Unity, and when the player shoots an obstacle, I want the obstacle animation to play and then destroy itself. I got it to destroy itself, but the animation won't ...
1
vote
1answer
44 views

Anchoring HingeJoint2D to clicked upon spot

I'm creating a 2D game where the user can click and drag objects around. This is done by connecting a 'Hand' object to the object the user is current clicking on with a HingeJoint2D. Right now it ...
0
votes
1answer
78 views

2D Tile Movement in Java

I have this tilemap and a player in my game, and I got the player to move by adding the velocity to the position. However, it is very hard to control the player exact this way of the tilemap. So, I ...
0
votes
1answer
38 views

Unity 2D collision detector not working

I'm making a 2D sidescrolling game in Unity where the player shoots at obstacles while running. But nothing I try seems to get the collision detection to work. This is the obstacle script: void ...
0
votes
1answer
28 views

How do I make this block go back to the left with another click?

This is the script I've written so far which makes the block move from the left of the screen to the right on a mouse click. What I want to achieve is for the block to move back to the left when I ...
0
votes
0answers
45 views

Slick2d - Why is my init() method running twice?

In the init() method, I have called the method loadMap() from the "world" object. But it seems to be called twice. I do not want loadMap() to be called twice. I have no idea why is this happening. ...
0
votes
1answer
22 views

Out of screen position to inner screen position

I don't know how I could solve this. I'm trying to accomplish this: So if a object is out of my screen I would like to calculate the position it would be inside of the screen. Searched already but ...
0
votes
2answers
86 views

Should I use DirectX 11 for 2d games or should I stick to DirectX 9? [closed]

After two years now I wanted to continue working on my sandbox project which I actually used to learn and experiment with various C++ features and DirectX. So far I have simple elements for 2d ...
0
votes
1answer
33 views

Changing one prefab changes all other instances of that prefab too

I have made two prefabs of my enemies for my 2D game: normal and damaged. The I put several of these prefabs on scene. When enemies health <=0 I need to destroy its GameObject and then instantiate ...