• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0
Behemyth

Finding an Enclosed Space on a Grid

10 posts in this topic

What would be a great way to test a random grid based shape to see if it contains a space that needs to be filled in? The spaces can range from a single block to ten blocks. Also the line of blocks has a chance to not form a shape but just form a line.

Behemyth
0

Share this post


Link to post
Share on other sites
It's not very clear what you are after, but this might be helpful:
[url="http://en.wikipedia.org/wiki/Flood_fill"]http://en.wikipedia....wiki/Flood_fill[/url] Edited by szecs
0

Share this post


Link to post
Share on other sites
[quote name='Behemyth' timestamp='1337352632' post='4941188']
to see if it contains a space that needs to be filled in
[/quote]

That bit is unclear to me. What do you mean by a space that needs to be filled in? The "need" may depend upon the game rules. Also does this need to be recalculated based upon user actions? For example, can a player open up an enclosed space (e.g. join it to another space), or can a player break an area into two areas? Do you need to be able to identify which grid cell belongs to which enclosed area quickly?
0

Share this post


Link to post
Share on other sites
To clear things up, the random shape that is placed on screen is not always solid. It sometimes has holes in it and I would need to have a way to fill those holes. Also, It would have to recognize what is a shape and only apply filling to that shape.
1

Share this post


Link to post
Share on other sites
Create a blank grid with each block set to a given value, say 0. Then place your object on the grid so that each block in your object has a different value, say 1. Then flood fill the outside of your grid with a different value, say 2. Whatever is left as 0 is a hole on your object.
1

Share this post


Link to post
Share on other sites
Ah okay, easy. I assume you know the rectangle that encloses your shape. For each row in that rectangle find the furthest left filled point and furthest rght filled point, and fill the line between these two points. Do the same rotated 90 degress, e.g. lines from top to bottom.
0

Share this post


Link to post
Share on other sites
That may fill in concavities that are not enclosed by the shape. Whether or not that is what the OP desires is unclear given the description.
0

Share this post


Link to post
Share on other sites
It depends what you mean by enclosed. It would fill in gaps that have a diagonal path to the outside. I assumed Manhattan and maximal filling.
0

Share this post


Link to post
Share on other sites
It would also fill in the mouth of a Pacman shape, which isn't enclosed by pretty much any definition.
0

Share this post


Link to post
Share on other sites
[quote name='SiCrane' timestamp='1337453317' post='4941488']
Create a blank grid with each block set to a given value, say 0. Then place your object on the grid so that each block in your object has a different value, say 1. Then flood fill the outside of your grid with a different value, say 2. Whatever is left as 0 is a hole on your object.
[/quote]

That is a pretty spiffy idea! Thanks to all who contributed.
0

Share this post


Link to post
Share on other sites
[quote name='SiCrane' timestamp='1337514549' post='4941623']
It would also fill in the mouth of a Pacman shape, which isn't enclosed by pretty much any definition.
[/quote]

Oops, my bad. ;)
0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0