A regular tessellation of a surface to create uniform, contiguous cells arranged in a consistent pattern.

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7
votes
3answers
1k views

Storing a Hex Grid

I've been creating a small hex grid framework for Unity3D and have come to the following dilemma. This is my coordinate system (taken from here): It all works pretty nicely except for the fact I ...
14
votes
2answers
326 views

Territory patrol planning

I am developing a game/simulation where agents are fighting for land. I have the situation shown in the picture below: These creatures are walking around and occupying pieces of land they step on ...
2
votes
1answer
842 views

Help with a Fast 2D Grid-Based world rendering technique

First I'm going to give you my current situation and explain what I'm attempting. I will then pose my question below. I will attempt to include a "TL;DR" for those of you who prefer things to be ...
-2
votes
1answer
155 views

In a regular grid, how can I tell which tile a position is in?

I have a position on the screen, how do I calculate which grid tile that position is inside? I know the number of tiles in the grid, and the size of the screen (including how many tiles fit on it ...
8
votes
3answers
3k views

Road / river generation on 2d grid map

This is a newbie question, but here it goes: My map is a 2d grid, and I want to generate roads and rivers. The route from the starting to ending point must not be the optimal route in number of ...
4
votes
1answer
2k views

More efficient way to implement Line of sight on a 2d grid with ray casting?

Consider a 2d grid of tiles, and an approximated sphere of coordinates - centered on the player - that represents line of sight. The goal is to block the line of sight beyond obstacles (ie walls). ...
4
votes
2answers
1k views

Simulating “line of sight” with obstacles on 2d grid?

Ran into an interesting problem. I need to figure out how to simulate line of sight - simple enough, just on a 2d grid with obstacles. Either a grid cell is visible, or it's not. I can get something ...
5
votes
1answer
253 views

Finding cells between two points (along line) to finding obstacles

My game is in 3D environment partitioned with 2D grids in 2 dimensioned array So I can get any cell/node by passing row and col like return _nodes[r][c]. When the an attacker attacks an enemy with ...
6
votes
4answers
1k views

Generating triangles from a square grid

I have a 2D square grid of values representing terrain elevations, and I want to generate triangles from that grid to make a 3D view of the terrain. My first thought was to split each square ...
0
votes
1answer
327 views

Alternatives to NSMutableArray for storing 2D grid - iOS Cocos2d

I'm creating a grid-based iOS game using Cocos2d. Currently the grid is stored in an NSMutableArray that contains other NSMutableArrays (the latter are rows in the grid). This works ok and performance ...
1
vote
4answers
150 views

Logic that can traverse all possible layouts, but not checking every combination of identical pieces?

Suppose we have a grid of arbitrary size, which is filled by blocks of various widths and heights. There are many 2x2 blocks (meaning they take a total of 4 cells in the grid) and many 3x3 blocks, as ...
3
votes
3answers
286 views

How to choose cell to put entity in in an uniform grid used for broad phase collision detection?

I'm trying to implement the broad phase of my collision detection algorithm. My game is an arcade game with lot of moving entities in an open space with relatively equivalent sizes. Regarding the ...
1
vote
1answer
288 views

Creating an interactive grid for a puzzle game

I am trying to make a slitherlink game, and am not too sure how to approach creating the game, more specifically the grid structure on which the puzzle will be played on. This is what a empty and ...
10
votes
2answers
573 views

Finding shapes in 2D Array, then optimising

I've just been allowed an image...The image below from my game shows some darkened blocks, which have been recognised as being part of a "T" shape. As can be seen, the code has darkened the blocks ...
2
votes
1answer
164 views

Should I take line thickness into consideration for a grid based light game?

I'm currently rewriting some horrific code I wrote for a prototype and have stumbled right at the start! The game I'm working on revolves around directing light and there is a small ambiguity in ...
1
vote
2answers
1k views

How can I make a tile appear on top of another without completely blocking the tile below?

Making a small RPG with libdgx just for learning about how to draw tiled maps and move around in them. I've got the tiles drawn and OrthographicCamera stuff figured out so I can see my world. My ...
5
votes
2answers
2k views

3D terrain map with Hexagon Grids

I'm working on a hobby project (I'm a web/backend developer by day) and I want to create a 3D Tile (terrain) engine. I'm using XNA, but I can use MonoGame, OpenGL, or straight DirectX, so the answer ...
3
votes
1answer
305 views

Space Invaders-type game: Keeping the enemies aligned with each other as they turn around?

OK, so here's the lowdown of the problem I'm trying to solve. I'm developing a game in PyGame that's a cross between Space Invaders and Columns. I'm trying to make the motion of the enemies similar ...
1
vote
1answer
608 views

Drawing 2D Grid in 3D View - Need help with method

I'm trying to draw a simple 2D grid for an editor, to able to navigate more clearly around the 3D space, but I can't render it: Grid2D class, creates a grid of a certain size at a location and should ...
2
votes
1answer
316 views

Detect if square in grid is within a diamond shape

So I have a game in which basically everything is a square inside a big grid. It's easy to check if a square is inside a box whose center is another square: *** x *o* --> x is not in o's ...
3
votes
3answers
647 views

Keeping player aligned to grid in Pacman

I am making a Pacman game using XNA. The game is tile based, with each tile being 32 pixels. As the player moves, I need to know whenever it is perfectly on a tile (ie position of 32, 64, etc...) so ...
0
votes
2answers
770 views

OpenGL align grid like glOrtho but with gluPerspective?

Using gluPerspective makes OpenGL's grid really messy and rather hard to use especially when trying to do mouse input. The grid that perspective uses is completely messed up compared to the grid you ...
1
vote
1answer
1k views

Displaying a grid based map using C++ and sdl

I am trying to create a roguelike game using c++ and SDL. However, I am having trouble getting it to display the map, which is represented by a 2d array of a tile class. Currently, my code is this: ...
2
votes
1answer
2k views

Any way to set up a grid for a board game in cocos 2d?

My first idea was to create a 2d array for my columns and rows, but it seems like there should be a better, or possibly cleaner, way to achieve this. Each square on the grid is going to have a ...
4
votes
3answers
427 views

Creating the nodes for path finding during run time - more like path making and more

I'm making my 1st game. I'm using javascript as I currently want to learn to make games without needing to learn another language but this is more of a general game dev question. It's a 2d turn-based ...
1
vote
1answer
626 views

terrain grid rendering problem

I'm using DirectX 9 and attempting to write a simple terrain generation object. I'm running into trouble with the rendering - I'm hoping that this is a common problem, and someone could spot the ...
1
vote
1answer
350 views

Getting fastest path on a grid

How would I go about finding the fastest path to connect two points on a grid? I'm making a 2D game and the map is based around a grid. I need to be able to account for any blocked tiles that the ...
1
vote
2answers
785 views

Reference a single 2d Rectangle in an array

What I am attempting to do probably has a very simple answer but I can't make heads or tails of it no matter how hard I try. Provided I'm a newb. What I am trying to do is after I create a grid of ...
4
votes
2answers
1k views

Grid/cell based light system

I am working on a top-down, 2d cell-based RPG game. I would like to implement a cell based lighting system, something like this and this. I basically have several light sources and light deteriorates ...
3
votes
2answers
943 views

How can I make grid tiles/plane transparent

I have made a grid using multiple planes. Now I want to place a image on this grid so that user cant see the grid I have made and I ll have access of all points of the image using grid. The problem ...
0
votes
1answer
2k views

Basic A star implementation tutorial [duplicate]

Possible Duplicate: Pseudo-code examples of A*? Hey guys Iam making a TD game and now I am stucked in implementing A star algo. I know there are many 3d party softwares but they are ...
2
votes
1answer
8k views

What is grid in Unity and how can I implement it?

I'm a beginner. I need to place a grid on my map in Unity and would like to access it to place a simple object on mouse click. How can I achieve this ? I am unable to understand the grid ...
3
votes
2answers
2k views

Algorithm to fit shapes to 2D grid?

Let's say you have an n-by-m grid. Some squares are occupied, some are not. You want to know where in the grid you can fit arbitrary shapes such as to not hit an occupied square. The shapes would ...
8
votes
3answers
1k views

How to find 2D grid cells swept by a moving circle?

I'm making a game based on a 2D grid, with some cells passable and some not. Dynamic objects can move continuously, independent of the grid, but need to collide with impassable cells. I wrote an ...
2
votes
2answers
871 views

Path finding in grid for objects that occupy more than one tile

In a grid-based game I am working on, I want to add objects that occupy more than one tile of the grid. Are there any algorithms or techniques to find paths for this kind of objects?
2
votes
1answer
434 views

Best way to create a 2D right-triangle grid

I would like to create a 2D right triangle grid for a game I am working on. Currently I am creating creating a 2D square grid, and each square contains 2 triangles. I am wondering, is there a way to ...
9
votes
1answer
847 views

Generating a town layout in a grid

I want to generate a town layout in a square grid (rendered isometrically, but that doesn't matter) using the following elements: 2x2 Houses Roads, 1 unit wide Canals, 1 unit wide Sample layout: ...