Flat two-dimensional space. Positions represented with `x`, `y` coordinates.

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0answers
38 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.
2
votes
1answer
84 views

Replacing a sprite for another on runtime (Unity3D)

I need to replace the sprite of a face down card for another sprite (of a face up card). This is the C# script attached to the face down card: using UnityEngine; using System.Collections; public ...
0
votes
1answer
64 views

How can i calculate that normal lays in same part of plane with point?

I.e. n0 for A and n1 for B. Plane divided by plane CD.
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0answers
50 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 ...
0
votes
0answers
60 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 ...
0
votes
1answer
77 views

Confused with how I should organize my code in a 2D game using OpenGL [closed]

I've just now started learning OpenGL and I'm getting very overwhelmed and confused with some things. I don't want to permaturely optimize things, but I also don't make decisions about things I still ...
2
votes
1answer
60 views

Collision detection between axis-aligned bounding box and bitmap (pixel perfect) terrain

Working on a Worms-type game, I have my objects in bounding boxes and they sit on the pixel terrain. Currently I am able to successfully do the collision detection for objects when they enter the ...
1
vote
0answers
136 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? ...
0
votes
2answers
253 views

Basic 2d platform collision detection algorithm has a slight bug (Java)

I'm trying to implement collision detection between Player (the main character) and a Platform. They are both modelled as rectangles; when player hits the side of a platform he should bounce off it ...
0
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0answers
52 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 ...
0
votes
0answers
45 views

I have an array of blasts and an array of zombies, how can I efficiently detect collisions? [duplicate]

I have an array of blasts, and an array of zombies, but I'm struggling to find a way to efficiently detect collisions and remove both the blasts and zombies that have collided. Any suggestions? ...
0
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0answers
73 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
votes
0answers
178 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 ...
-1
votes
2answers
132 views

Where to start developing a 2D puzzle game [closed]

I would like to start developing a 2D puzzle games, much like sudoku for example. I would like to publish it on Facebook and on gaming websites, like miniclip, agame, kongregate. The game should have ...
0
votes
1answer
82 views

Animation fails due to a NullPointerException which I'm certain shouldn't be thrown (LibGDX / Java)

What the title says basically. I've been stuck on this error for a few hours I got it to work earlier but I honestly can't see why its failing now (ctrl + z'd back to the working stage). Here's my ...
0
votes
1answer
104 views

Drawing faded lightmap in 2D polygon

I have been making a 2D visiblity algorithm by following this tutorial http://simblob.blogspot.se/2012/07/2d-visibility.html I have managed to create the light vertices and it works fine when I draw ...
0
votes
0answers
16 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 ...
0
votes
1answer
101 views

LibGDX - Executing 2 different touchDown events in the same method

On the bottom left of my screen is a circle with an Arrow and on the bottom right is a circle with a gun. If the player is in jetpack mode and the Arrow "button" is clicked he flies like flappy bird ...
0
votes
1answer
100 views

StartCoroutine inside TriggerOnEnter2D isn't working

I am new to this, but I need help with a CSharp script. I need to collide with the desired object, pass the game to be 1.6 in TimeScale. After passing 8 seconds in the game, change back to 1 ...
1
vote
0answers
38 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 ...
0
votes
0answers
20 views

organised sprite sheets for hobby game dev [duplicate]

does anyone know of any good sources of sprite sheets? I have found many good sites like spritedb and found a nice source on somewhere called sigtutorials . However, am I just being dumb or are they ...
2
votes
2answers
87 views

Creating LOS zones on a 2D grid for chase AI

I have a 2D grid, around 20x20, stored as an array. Each grid cell can contain an opaque object or not. I also already have an algorithm to calculate LOS between any two squares via Bresenham. I want ...
0
votes
1answer
32 views

switch between player camera/non-camera positioning

Sorry if this sounds ambiguous. But I am writing a traditional top down game. And normally the player would be centered in the middle while moving the orthographic camera. However, I would like this ...
1
vote
1answer
128 views

OnMouseUpAsButton not always called

I'm working on a 2D implementation of Free Cell in Unity 4.6.1, and I'm having trouble getting my click-detection code working consistently. The code below should be called every time a card is ...
1
vote
1answer
78 views

How to make a scrolling background in Delphi with FireMonkey?

I'm making a scrolling background game alike classic Mario 2D games. How do I make a scrolling background in Delphi XE7 using FireMonkey?
6
votes
4answers
960 views

Difference between Update method and FixedUpdate in Unity?

i am starting to learn Unity3d and one of the confusion i get is difference between Update() and FixedUpdate(). I am following Lynda Unity 2D game development tutorial there, the instructor uses ...
6
votes
1answer
599 views

How to make Line Renderer lines stay flat?

I've noticed that as I add more vertexes to a Line Renderer line the line twists and stops being a smooth line. .GIF Here: http://i.imgur.com/hRAhCXM.gif All lines are on the same z level, even ...
0
votes
0answers
37 views

2D Platformer Pathfinding [duplicate]

First of all, I'm sorry, I know this is a really broad topic, but I've been trying to do this for days, I've looked at about a hundred different Google links, and I'm just not having any luck. ...
0
votes
1answer
79 views

Path finding for Vector Based System

I understand that typical path algorithms are based on nodes in a graph (not tiled nodes or whatever), but i can't get my head around to find an idea how to implement a path finding algorithm for a ...
0
votes
1answer
121 views

2D game with angled top-down camera perspective [closed]

I want to create a game similar to binding of isaac, a slightly angled top-down 2D game. In binding of isaac, the character moves and shoots along a 4-way path, so when he is shooting towards East, ...
0
votes
0answers
22 views

How to display armor/equipment on a character? [duplicate]

I've been working on an Online 2D RPG mostly for fun and for getting a basic understanding of Socket Communication, packets, and just basic game development. Like most RPGs there is some kind of ...
2
votes
2answers
314 views

How can I generate a 2D mountain landscape procedurally?

Every level in my game needs to have a different mountain landscape background generated automatically (but the landscape must be the same for each level). How could I generate such a landscape ...
2
votes
3answers
210 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
70 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
376 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
91 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
92 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
votes
0answers
73 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
195 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
votes
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 ...
0
votes
2answers
81 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
1k 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
103 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
169 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: ...
1
vote
2answers
130 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
82 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
146 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
136 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
179 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 ...