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      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.
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reverso13

Recognize drawing made by user

3 posts in this topic

Hi everyone,
I'm working on a personal project for android. I'm programming with actionscript 3 using adobe air.
I'm trying to make a game in which I show an image to the user, for example a triangle, and the user has to paint with his fingers on top of that image and trying not to leave the path. After he finishes drawing I want to check how good the drawing was compared to the original.
As a begginer I don't know where to start or how to implement such a thing.
What would you guys do??

Thanks
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As a beginner I'd suggest start with a simple approach, for example:
- For each drawing also store a version where each line has been expanded x pixels in every direction, so effectively a thick line
- Add points for the percentage of the thick line which is filled
- Subtract points for the percentage of what they drew which is outside the thick line

The beauty of the approach is that for scoring all you need to do is ask for each pixel "is it in or out of my ideal answer picture". If you don't care about the thickness of the line you would need to only take the length into account, e.g. if there is a filled pixel anywhere within the width of a segment, consider the segment filled.

It's so hard without diagrams!
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[url="http://www.lextalkington.com/blog/2011/01/dynamic-mask-and-image-comparison-part-2/"]http://www.lextalkington.com/blog/2011/01/dynamic-mask-and-image-comparison-part-2/[/url]

might be of use to you

:)
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Thanks a lot for the help guys! I'll try to implement it and I'll tell you if it works [img]http://public.gamedev.net//public/style_emoticons/default/biggrin.png[/img]
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