• 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
graveyard filla

[.net] How do you typically cast in VB.NET?

2 posts in this topic

Hi, What is the 'standard' way to cast things in VB.NET? I have been using CStr,CDate,CBool, etc, along with CType() where the built in type is not found... However i've recently been informed that the C* functions (except CType) are non-standard and could possibly be removed from the framework one day, although not very likely to ever happen... And now that I think back, I think I only started using the C* functions because of all my experience coming from a C++ background.... What is the way to do a C-style cast then? What about the C-style template castings (like dynamic_cast<>)? Is the former the C* functions, and the latter the Convert.* functions? Should I strictly use the Convert Class for everything, except where DirectCast is appopriate? OR should I stick with my C style casts, or what? I DO understand that you should use DirectCast when you *know* there is a parent/child relationship... but what other rules of thumb should I follow for using what casting styles? Thanks for any help [Edited by - graveyard filla on January 3, 2007 6:48:36 PM]
0

Share this post


Link to post
Share on other sites
Personally I use DirectCast when I can in most of my VB code since it's a bit faster.
"
The DirectCast keyword offers yet another way to cast a type to a different type. This keyword has the same syntax as CType but differs from the latter in a few important details. First, CType always attempts to convert the argument to the target type and is therefore able to convert a string into a numeric type (if the string actually contains a number, of course); DirectCast works only if the source argument can be cast to the target type and throws an InvalidCastException object otherwise. (DirectCast is unable to perform widening conversions even from Short to Integer or Single to Double.)

Second, DirectCast is slightly faster than CType, so you should use the former when you want to cast rather than convert a value. In practice, however, the speed difference between these operators is negligible. Summarizing, you can use the DirectCast keyword on three occasions:

When unboxing either a primitive value type (such as a number or a date) or a custom value type you've defined with a Structure…End Structure block

When casting a variable of a base class to a variable of a derived class—for example, a Person variable to an Employee variable or an Object variable to another reference type

When casting an object variable to an interface variable"


0

Share this post


Link to post
Share on other sites
I see... For some reason I thought DirectCast was more limited to things with parent/child relationships, but apparently not...

Those 3 cases pretty much handle everything... When not using DirectCast, should I always use the Convert class then? E.G. the C* function have no special use case? Is that typically what you guys are doing in your production builds of your software?

Thanks again.
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