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

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0
votes
2answers
427 views

How to reverse gravity in Unity

I'm trying to figure out how script gravity reversal on collision with an object. How can I reverse gravity?
1
vote
1answer
100 views

How do you save Path2D data?

I am making a java game using path geometry. Is there any way to save the data stored in a Path2D to a file?
0
votes
1answer
156 views

Best way to go about collision between rectangle and bool array containing pixel data?

Basically, if I have an array along the lines of bool[] collision; Filled with a value for each pixel in the sprite I am checking collision against (pixel 1 = true, pixel 2 = false etc), how do ...
1
vote
1answer
241 views

How to keep player in the center of the screen but let him move to the edge of the map without moving camera there? [duplicate]

In my rpg-styled (top-down perspective) 2d game, I want my player to be at the center of the screen, while the entire world moves, giving the effect of player movement. I can make that, but my problem ...
0
votes
1answer
34 views

Destroy a single list member

im trying to destroy a single game object using the following script but it destroys all of them , not the ones I want. I want to destroy the ones that the transform that holds this script collides ...
0
votes
1answer
78 views

How do I split a button graphic into a 9 patch?

I understand what a nine patch is but I don't understand how to create one with code. I've made an image with a 1-pixel black border, but how do I turn that into a nine patch? How do I make a nine ...
0
votes
1answer
141 views

Java 2d Gaming, best practice to update random falling objects

I'm new to game development. I do have basic knowledge in Java and also have moderately good experience in OOP from other languages. I started developing this simple 2D game as my first project. The ...
1
vote
1answer
50 views

Positioning of AABB / Rectangles

I am wondering what is the best way to position rectangles, the ways I have thought of are: Have an x and y at upper left, then have a width and height Have an x and y at upper left, and an x and y ...
0
votes
1answer
122 views

Bounding Box not rotating based on draw rotation (Java)

In the process of developing a 2D game and am having some issues with translating coordinates on rotation. The object being rotated is a sword that is attached to the player. The player currently ...
1
vote
1answer
89 views

Getting normal map of an image

I'm trying to achieve the results in this tutorial: Link So far, I was be able to do that; with these; public PixelMap GetNormalMap(double strength) { var newMap = new ...
4
votes
2answers
300 views

Bevel outline algorithm in 2D

I'm writing a program that creates animated blobs in 2D, to simulate cells. In order to beautify these objects, I'd like to give them a 3D look by adding a bevel-effect. How can this be achieved? ...
1
vote
2answers
132 views

How can I handle position in an entity system where position can be 2D or 3D?

I'm working on a game engine to learn how it's done (so I might better take advantage of the techniques involved and other, similar engines in the future), and I've run into a problem when handling ...
0
votes
1answer
53 views

Why is 2D light ray collision result getting inverted at specyfic angle

recently i've been working on 2D lighting for my game. I've created new little project, and I've encoutered a problem. The collision between light ray and the object is fine at angles 316-360 and ...
0
votes
2answers
324 views

Can the GUI be used to create game objects?

I want to be able to position 10 various game objects (sprites) within the area of the screen which will be dynamically sized accordingly to the screen size of the device. The area in which I want to ...
3
votes
1answer
305 views

Parallax effect for layers in Unity2D

I have a simple game scene where i have put a number of images. I combined these images into layers (SortinLayer, to be specific). So now I have 3 layers. I have read a few tutorials, but in them was ...
4
votes
2answers
297 views

Jelly ground collision

For fun I am trying to replicate the mechanics from The Floor is Jelly. So far I have successfully created "jelly islands/blocks" which are represented by an array of points and then drawn by using ...
0
votes
0answers
172 views

Dynamically destroy objects when player enters a boxcollider2D

What would be the best approach for destroying dynamically objects when player enters a boxcollider2D? Currently using parent objects with boxcollider2d to activate OnTriggerEnter2D, boxcollider2d is ...
0
votes
0answers
109 views

Change 2D Angle Into Isometric Angle

i Rendered My Sprite With 72 Angles In Isometric View. Rendered Frame Number 0 And Angle 0 Is When My Sprite Looking Right And And I Rendered My Sprite Every 5 Angle. In My 2D Game My Sprite Moving ...
0
votes
1answer
69 views

2D Hitboxing on an HTML image [duplicate]

I want to make a turn-based game where the player is given "opportunities for attack." An image of the in-game sprite character appears when it's the player's turn to attack. The player can mouseover ...
9
votes
2answers
453 views

How do I perform an xBR or hqx filter in XNA?

I'd like to render my game scaled up with one of the hqx filters (hq2x, hq3x or hq4x) or an xBR filter in a shader. How can I do this in XNA 4.0 and SM3? Side note: this question has been heavily ...
0
votes
0answers
75 views

Angel2D won't find GLFW

I'm doing my first steps with C++ and game development to build a simple prototype. I've chosen Angel2D as framework to get some help from the beginning but I have problems to get it working with a ...
0
votes
1answer
163 views

How can I create the illusion of a 3D object moving around in a static background?

I'm designing a Resident Evil clone using OpenGL. I'm curious how the older Resident Evil games used a static pre-rendered background with 3D models roaming around: Here, if the main player ...
0
votes
0answers
101 views

How to get drawing offsets for an isometric camera

I do have some semi-working code, but I'm really stuck on getting everything to align to the screen properly. Here's my current, broken solution in Javascript: //ts = tile size (i.e. 64), th = ts/2, ...
0
votes
1answer
486 views

Camera Touch Zoom and Pan with world - 2D

I am doing my first unity2d game and im in need of a little optimization for my camera. I have a camera which could pan and zoom with the speed i have defined. The problem with that is the speed i ...
0
votes
0answers
77 views

How can I get the position of a cursor on world space on a 2D game

I am trying to make simple 2D top down shooter to train my skills on Graphics programming and I am having trouble getting the input. I am using glm as my math library, what I am trying to do on the ...
0
votes
1answer
581 views

2D sprite 360 degrees rotation according to the mouse

I am trying to make my top down character rotate according to degrees between its position and the mouse. I'm using this code: float xDiff = mouseState.X - (graphics.PreferredBackBufferWidth / 2); ...
1
vote
3answers
976 views

How to calculate corner marks of a rotated rectangle?

I've got two elements, a 2D point and a rectangular area. The point represents the middle of that area. I also know the width and height of that area. And the area is tilted by 40° relative to the ...
1
vote
2answers
141 views

Getting around limitations posed by float in space game

I'm working on a procedurally generated game set in outer space. As in the real world, the game universe will be pretty much 99% empty, with planets/stars/solar systems etc... being very far apart. ...
4
votes
3answers
605 views

How to generate a “loop room” in a platformer game (by Unity)?

I want to build a level with a room whose left edge is linked to right edge in a 2D platformer game in Unity. My goal is let all objects disappear in one side will appear in other side of the room. ...
0
votes
0answers
110 views

How to get rid of half pixel artifacts?

I've been having a bit of trouble using OpenGL to make 2D games. I am using a traditional ortho perspective with just some sprites being rendered and moved around. It all works perfectly but there is ...
1
vote
1answer
92 views

Custom 3D Noise function incorrectly generating in Lua

I have been working on a custom noise generator (not Perlin on Simplex or whatever), which works fine in two dimensional space, but upon converting it into three dimensional space, it turns into a ...
0
votes
1answer
600 views

Android Canvas 2D Game: Supporting multiple screen sizes/resolutions [duplicate]

I'm planning to develop a 2D game for android devices by using simple Canvas Surfaces (I know that OpenGL might be more efficient - but Canvas should definitely be enough for my type of game). I'm ...
1
vote
2answers
98 views

Required number of images for octagonal tiles

I'm planing to write a game based on octagon tiles. Currently I'm wondering how many images I really need. That is something about graph theory, I know that, but not only. I want to connect each side ...
0
votes
0answers
142 views

Layers with parallax in a game with zoom out by a transformation matrix

I'm trying to implement a parallax rendering to my multi layered backgrounds. It's a classic 2d fighting game like The King of Fighters and Street Fighter. It may have a stage composed by 5 layers. ...
3
votes
2answers
309 views

How do I make a 2D race car turn smoothly? [duplicate]

I'm making a competitive 2-player 2D racing game for a school project. I'm struggling with the movements of my car: I made it a square for testing purposes and it can move left, right, up or down, but ...
8
votes
1answer
1k views

Using L-Systems to procedurally generate cities

I'm currently making an app that focuses a lot on procedurally generated content. So far, I've successfully implemented the procedural generation of the terrain and shape of a map using simplex noise. ...
0
votes
1answer
108 views

Location of “units” in Code

So, I've been playing around with the concept of a game, mechanically think of the Civilization games(Tile, turn-based strategy) but I am quite uncertain about where I should store the units location ...
0
votes
0answers
95 views

How to move vertices of matrix in order to cast a 2d shadow?

I am trying to add shadows to my 2D xna game. Currently I have created a "shadow" using the texture of the caster with a transparent gray color, rotated, and stretched using a matrix. This, though, ...
2
votes
1answer
126 views

Infinite loop of prerendered 3d graphic

I have a game where I want a never ending pathway for the character to walk along. So in my 3d modeling tool I created a path like this: now I want to loop that model over and over in my ...
2
votes
1answer
1k views

How can I access a script variable from another script in Unity?

I'm creating a space shooter (think Space Invaders or Galaga) where the GameManager persists between scenes but the player and enemies don't. I need to access a boolean value from the player and ...
1
vote
1answer
96 views

Rotate an arrow on a plane?

I'm creating a display for a GPS-based embedded system and would like to have an arrow indicating the current bearing. I'd love the arrow to have a 3d appearance by rotating it on a plane tilted up ...
10
votes
4answers
804 views

Should I have multiple small textures or a single big one? [duplicate]

I'm using SDL 2 to create a small 2D game. Based on the docs, this is what I would do: SDL_Surface *surface = SDL_LoadBMP("image.bmp"); SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, ...
1
vote
0answers
250 views

Best view for 2D Android game in Xamarin [closed]

I am trying to create a 2D multiplayer turn-based cooperative game for Android in Xamarin with possible future implementations for Windows Phone and iOS. The main inspiration for my game is Pandemic. ...
0
votes
1answer
162 views

Xna 2d tile culling

I'm trying to make a simple 2d tile engine here, and I've got a problem with getting a proper cells from a tile grid map when I'm trying to cull off tiles which aren't needed to be drawn. I've got a ...
3
votes
1answer
458 views

How do I handle rope physics with fixed ends and a sliding weight?

I've been interested in rope physics recently—I've successfully implemented a simple Verlet rope with moveable ends. Now I am trying something a little different: I want to start by recreating the ...
0
votes
0answers
74 views

How to translate vertex buffer coordinates in 2D

I am trying to (using a 2D Directx9 engine library) rotate/translate a set of points in a vertex buffer. I understand how this would be done in a 3D system - i.e using the vertex shader stage of ...
0
votes
0answers
83 views

Data structure to store map layers in each Tile while keeping the order of terrain, items and monsters intact

My game represents its map as a 2D array of tiles, each of which stores a stack of layers. I'm looking for a data structure to efficiently represent this . I want to be able to add layers ...
3
votes
2answers
1k views

How to calculate left/right oriented angle between two 2D vectors? [duplicate]

I would like to calculate angle between two 2D vectors. Here's a picture of what I'm trying to achieve: I have an obstacle line segment AB and incoming moving PC. If I'm coming from one side C¹D¹ ...
0
votes
1answer
281 views

How do I get the mouse coordinates relative to my whole scene with Monogame? [duplicate]

I am making a topdown isometric real time game using Monogame. I know how to get the mouse position for my camera view. How do I get the mouse coordinates relative to the entire scene? My game's ...
1
vote
0answers
89 views

Why does my texture-based object picking detect the wrong object? [closed]

I am a LibGDX beginner implementing a RISK-like game. I want to let the player select territories by clicking on them, but for some reason, the wrong territory is sometimes detected. The clicked ...