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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1k views

Why is my deferred lighting implementation so expensive?

I've implemented deferred lighting and I tried to put about 20-26 lights on the viewable space of my map, and it brings down the FPS from 61 to 28-31. It also makes my VGA temperature to go from 68°C ...
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0answers
57 views

Create a 2D orbit trajectory like in angry birds space and a circular orbit

I am working on a 2D game, and I am working on adding some space physics : I need to find a way to create a circular orbit and an orbit like angry birds space ( the spiral trajectory ) . So there is 2 ...
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0answers
26 views

2D Polygon Collision push direction with large polygons

I have a collision detection/resolution implementation that uses the Separating Axis Theorem. Detection and such works perfectly fine, as well as resolution for most objects/shapes in my game. ...
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0answers
89 views

How to make a sword swing effect

I'm working on a 2d java game on Slick engine and I always wondered how to make swing effects when striking with a sword? How to code something like this? ...
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0answers
31 views

Unity Javascript GUI.Button shows up twice

Hi I have created a simple menu in Unity but I wanted to create my own style for colour/fonts. However for some reason it prints each button twice to the screen, once with my custom style, and once ...
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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 ...
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0answers
78 views

Setting the main camera's size to be equivalent to the device's width and height

Making a 2D game with Unity. I need a way to set the main camera's width and height to be equal to the mobile device's resolution. So if you're using an iPad Mini 3, then the main camera will be 2048 ...
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0answers
399 views

Phaser / PIXI: World size vs. Stage size

I am using Phaser to build a "zoomable / pannable" 2D galaxy with the intended functionality being that the player's home planet is always in the middle of the World coordinates. I have a problem ...
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0answers
78 views

Cubic bezier polygon clipping

I have a large cubic bezier defined 2D polygon area which I need to render in DX11 real-time to create as many 4096x4096 textures as needed. An average control point count would be around the 12k and ...
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0answers
73 views

How to make a text of several letters animate, only with an animation

I wonder if it is possible to create an animation in a text with a single "animation". The problem is that for me to reach the desired effect I need to create an animation for each letter, as each one ...
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0answers
92 views

unity4.3 rigidbody2d unexpected force behaviour

So guys ive edited the question and here is what my problem is i have a player which has a rigidbody2d attached to it.my player is able to doublejump in the air nicely and stick to walls when ...
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0answers
1k views

Unity 2D loading Spritesheet Atlas at runtime from web and using it dynamically

I am new to Unity (came from AS3/Starling) and just started for 2D games in Unity. I have a spritesheet / texture-atlas (many different sized images packed in a single png) which I want to download at ...
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187 views

How should matrix-based Parallax Scrolling work?

The question is at the end, as it requires a bit of context. I'm not sure if my understanding, my code, or LibGDX's ParallaxCamera is wrong. LibGDX's ParallaxCamera uses Matrix4s to achieve a ...
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0answers
112 views

How can I modify my procedural shadows to also show some of the walls?

I'm rendering shadows in Libgdx with the method from this tutorial. I think it's a nice and easy method. I render all my shadows in a framebuffer, then invert it. Before invert: After Invert: ...
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0answers
336 views

2D Camera transformation sidescroller

i am currently trying to dive into 2D programming with DirectX, especially bulding a tile based sidescroller. I have worked with some chapters from a book (Advanced 2D Game Development) but always ...
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0answers
168 views

scale rotating boundingbox

I want to use basic rectangular collision detection. I have a rotating sprite and a method that calculates the bounding box every time in the Update() method. I simply check for intersection between ...
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0answers
331 views

iOS cocos2d - sprite gets stuck in collision detection

I'm developing a top down game in cocos2d and I have collision code that checks collisions between enemies and the player so that they don't go through each other. The code seems to work but the ...
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0answers
59 views

Creating transparent image with localGraphicsConfig not always working

I'm trying to use GraphicsConfiguration.createCompatibleImage to create transparent images. This creates an empty image which I'm filling with a mosaic pattern later on in the code. This seems to ...
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0answers
480 views

Stacking Drawing Matrix for SpriteBatch in XNA

I'm trying to make a 2D engine for XNA with SpriteBatch. My object unit is Entity, which can include other Entities as its children. However, when drawing them, the rotation and scaling stacking do ...
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153 views

How can I use iteration to lead targets?

In my 2D game, I have stationary AI turrets firing constant speed bullets at moving targets. So far I have used a quadratic solver technique to calculate where the turret should aim in advance of the ...
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0answers
252 views

Outline Shader Effect for Orthogonal Geometry in XNA

I just recently started learning the art of shading, but I can't give an outline width to 2D, concave geometry when restrained to a single vertex/pixel shader technique (thanks to XNA). the shape I ...
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0answers
424 views

Dynamic 2D soft shadows with concave polygons?

I've implemented dynamic 2D soft shadows from this article on gamedev.net. It uses an image for the penubmra and is fast, physically accurate and looks good in most situations, so I really like the ...
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0answers
67 views

DirectWrite Producing Strange Artifacts?

I've written the basis to my UI system around Direct2D. I like it because it's fast and easy to use (even if I had to do some messy work to get it to work with DirectX11). However, I notice when using ...
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207 views

Sprite sorting issues

I apologize for the vague title, I'm not sure how else to phrase this problem. I am using tIDE to assist me in my game's world development. To give a dynamic effect to map layers within tIDE, it has ...
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0answers
304 views

Need help with objects moving toward the player

I am making a 2D game with simple "gravity": everything is just pulled toward 0,0. The speed at which they accelerate towards it is GravityAcceleration up to MaxGSpeed. I also want the player to be ...
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120 views

Fixed time step with Akihabara

How could I implement fixed time step with Akihabara framework? I would like my avatar to move by fixed distances of one block as in Supaplex.
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33 views

2D animation customization based on 3D model

We're looking for a good pipeline to create animated assets for our 2D game. Characters are seen from isometric viewpoint, and there are several characters with the exact same animations (idle x 4 ...
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27 views

In Java swing, while handling a 2D top down game, how should I handle scaling for quality transformations (mainly screen rotation)

For my top down game, I plan to have screen rotation where entities don't rotate, but everything else does. I am using a raster array to store my image so I don't have to render things stacked on each ...
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0answers
50 views

Creating a 2D game on the X-Z plane instead of the X-Y plane in Unity, any adverse effects or challenges with this?

After coming to the realization that some things I wish to do in a 2D RTS are easier to do on the X-Z plane instead of the default X-Y plane, I'm considering moving my game over to the other plane. ...
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0answers
20 views

PlatformEffector2D “Collision Pop” Avoidance?

I have noticed that when "One Way" is checked, and you have your character jump up through the platform, the character pops up to the top as a way to resolve the collision of the player and the top ...
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33 views

Collision Detection acting weird

I started learning programming in java. and I've decided to make a simple game but, got a problem in collision detection. The problem here is that the collision detection is sometimes not working. ...
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0answers
24 views

Efficient point-in test on static Polygons

I have some convex 2D polygons that are static and I would like to create an efficient point in test for them. I'm pretty new to this area of study so I just want to make sure I haven't made an error ...
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0answers
29 views

Are there conventional 2D isometric axis directions?

I'm making a 2D isometric game, but now that I gotta decide which direction X and Y increase, I think it would be best to consider the common practice. In which directions do each of the axes usually ...
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31 views

How to use Android Sensor, only in x axis

I have seen some tutorials but they are very complicated and they are about the three axes (x,y,z). So I want a code that moves an object or more (for example) to the right or the left when the ...
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0answers
16 views

2D smooth Rotation Unexpected

I am trying to get a smooth 2D rotation and this semi works but only in (-x, +y) I have tried using a lerp but I still get the same result. So I believe, it has something to do with the rot_z value ...
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0answers
35 views

Per pixel collision using marmalade bug

I'm trying to implement space invader, collision with barrier in which you blast some pixels, for the time I'm drawing a circle, right now I get correct collision but only on the bottom of the ...
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0answers
27 views

possible way to bring canvas 2d animation in canvas webgl context

when added 2d animation canvas in 3d webgl canvas as texture, 2d animation and 3d animation both stopped working. Any reference for this.
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49 views

Calculating Bounding Rect

I'm trying to clone space invader of atari and I have problem with bounding rect calculations.. the rect is not correctly bounded.. maybe I have problem with the transformations void ...
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0answers
48 views

Unity PolygonCollider2D acts different on iOS Device

I'm instantiating new game object, then adding a SpriteRenderer component and attaching a sprite object, and only after the sprite is fully loaded, I add a PolygonCollider2D, to fit the sprite I've ...
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0answers
44 views

How would I change an object's fixed angle upon collision with another object?

I'm trying to get an object to change its fixed angle once it gets hit with an object via collision, unless there's a better way. This is the code that I was using for a slingshot weapon so I figured ...
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0answers
65 views

Steering problem in 2d game

I am creating a little 2D non tiled top down game. The enemy uses steering behaviour for chasing player or wandering around, but I do not think my code is working as it should be. My problem is, the ...
0
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0answers
154 views

Most efficient way to achieve the following 2D heat wave background effect?

In Unity, what would be the most efficient way to achieve the following heat wave background effect Super Metroid - SNES (skip to 34m 5s for those on mobile) http://youtu.be/yB317FOcU0Y?t=34m5s ...
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0answers
15 views

Smoothly scaling positions of GraphicsItems on a 2D GraphicsScene

I layout a bunch of nodes on a QGraphicsScene(A 2D Canvas). The nodes are basic ellipses. It works reasonably well. However I would like to know how to better size the ellipses. Currently I have a ...
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0answers
76 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. ...
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0answers
54 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
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0answers
36 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 ...
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0answers
135 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 ...
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0answers
303 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 ...
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0answers
61 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 ...
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0answers
71 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; ...