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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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ownsun

Advance way to warpper the vertex buffer (vertex element) in XNA?

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   I am currently doing sth to warp the VB and IB so that I could load some other model formats such as .mesh in Ogre.
    Some of formats may use different VT_Sementics such as Normal \ Tangent and sth else, so I am trying to determin my vertex declartion type dynamicly when read the formats, so I just add a basic interface : IVertexType(I am using XNA 3.1 and this interface is just does the same thing with XNA 4.1 does), and I would dynamicly choose the typical vertex type on the way.
 
    But what really matters is , I need to update and set the VB and IB  to the device, I had to iterate all the vertex data maybe VertexPositionNormalColor[] array, and need to check if a specific element exists.  
 Just like what I am current doing:
 
    Vector3 position = (Vector3)originVertexData.GetValueByElementName("position");
     public object GetValueByElementName(String name)
        {
            switch (name)
            {
                case "position":
                    return mPosition;
                case "normal":
                    return mNormal;
                case "texcoord":
                    return mTexcoord;
                case "tangent":
                    return mTagent;
                case "color":
                    return mColor;
            }
            return null;
        }
 
 
        public void SetValueByElementName(String name, object value)
        {
            switch (name)
            {
                case "position":
                    Vector3 position = (Vector3)value;
                    mPosition = position;
                    break;
                case "color":
                    Color color = (Color)value;
                    mColor = color;
                    break;
                case "normal":
                    Vector3 normal = (Vector3)value;
                    mNormal = normal;
                    break;
                case "texcoord":
                    Vector2 texcoord = (Vector2)value;
                    mTexcoord = texcoord;
                    break;
                case "tangent":
                    Vector3 tangent = (Vector3)value;
                    mTagent = tangent;
                    break;
            }
        }
 
    Vector3 transformedPos = new Vector3(x, y, z);
    targetVertexData.SetValueByElementName("position", transformedPos);  // then apply the bone transform.
 
 
////////////////
 
 As you can see up there, there are lot of boxing and unboxing operation, and it's ok when the buffer require lessupdate, but it's a disaster when an animation are applied to the vertex buffer(software animation). So I am wondering if anyone could tell me a better way to do this?
 
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