• 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.

hdxpete

Members
  • Content count

    71
  • Joined

  • Last visited

Community Reputation

512 Good

About hdxpete

  • Rank
    Member
  1. thanks for the advice. not sure what i will do yet.   i was really hoping that there was a cool casting trick i havent seen yet...
  2. hmm. that is really unfortunate. i really didn't want to redefine all methods that take ints to now take a union instead. i guess though it is better to bite the bullet...
  3. no not looking to use a union   basically i'm looking to know how i have to modifiy this code inorder for it to work as intended.   int x = 100; myRefData->data = x; int y = (int)myRefData->data;.
  4. Hello,   I am currently upgrading a game engine from a 32bit system to a 64 bit system. there are definate spots where the original author was holding a pointer in an int.    struct myrefdata {   int data; };   now i want to upgrade this to a 64 bit system. my initial idea was that this should be a void * instead of an int so   struct myrefdata {   void *data; };   now what i am finding is where the author did intend to actually hold an int in this field needs to be adjusted.   int x = 100; myRefData->data = x; int y = (int)myRefData->data;   while this example is a large oversimplication. i was wondering for those with more 64bit experience that me for assistance.   i am using c++11 on all my target platforms. how can i correctly convert a int to a void * and a void * to int, for the times i do want to hold an int in a void *?     another question...   assuming that there are other sections of the game engine where it is just impossible to convert that int to a void * but it does hold a pointer, is there a way i can force a memalloc in the 32bit space? or if i cant do that declare an array in global space of the program to hold the pointer and put this array in 32bit memory space.     very much appreciate any help anyone could provide.
  5. your stride should be the same for all glVertexAttribPointer calls. i think you are mixing up the last 2 parameters.   1. is the sizeof(vertex) 2. offset from 0 to that data element in vertex.
  6. thank you kalle_h for the link   and thank you cgrant. this is the reason i asked for the specification. as we appear to be seeing some devices that are behaving slightly different. we resolved it by raising the precision however we would like to know if it is an implementation error on the driver or our part.   thanks again for the link kalle_h
  7. hello,    apologizes up front. my google-fuu is a complete failure today. i'm looking for information on the minimum sizes of lowp, mediump, and highp for opengl gl es 2.0.   if someone knows where to find this information i would be most grateful.   thank you
  8. DX11

    looks like you have your matrix multiplication reversed.   A * B * C != C * B * A   reverse the order.
  9. for(texture in textures)     for(sprite in sprites)       if(sprite.texture == texture)         list.append(sprite)       if(list.size > 0)       list.draw()     thats the basics. implementation is up to you
  10. •Minimize state changes and group the remaining state changes. How do you group state changes? - for example... changing the alpha blending.  •Use static vertex buffers where possible. How do you know if it is static? -i forget the flags but basically... can you write to it after it's created? then it isn't static Use one large static vertex buffer per FVF for static objects, rather than one per object. What if each object has the same vertex property? Eg. all objects are 256 x 256 quads? reuse the same buffer? - i create 2-3 pools. switch pools every frame. hopefully reduces lag to gpu •If your application needs random access into the vertex buffer in AGP memory, choose a vertex format size that is a multiple of 32 bytes. Otherwise, select the smallest appropriate format. Random access as in needing to change vertexes at runtime? - data = vb->lock(); data +13 = x; vb->unlock();   lock/unlock as minimally as possible. write to a locked buffer as minimially as possible.   one thing i noticed is you are doing 1 draw call per sprite. group sprites by texture to reduce draw calls. you may have 10k sprites but do you have 10k textures? maybe you have 10k sprites but they are on 2 textures. you don't need 10k draw calls. you can do it in 2.
  11. while the actual calculation of three matrixs M * V * P may take a shorter amount of time on the GPU then the CPU. typically the CPU is a frame or two ahead of the GPU anyway. Also moving any calculations from the gpu to c++ with make your shaders faster meaning you can draw more pixels per second meaning you have a higher fps.   for shaders i follow the KISS method.
  12. OpenGL

    maybe not the cause of your issue however border is an int not a float.   void glTexImage2D( GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid * data);  
  13. I can't answer questions about speed. however i created a method to wrap the DX calls away from me. and i put a boolean flag to indicate that the VBO contents will change each frame.   so if it is never changed i create with usage IMMUTABLE and CPUAccessFlag 0 if it is changed i create with usage DYNAMIC and CPUAccessFlag CPU_ACCESS_WRITE   YMMV
  14. i do 99% of my work in GL ES. but the 3rd and 7th parameter on GL ES have to match. it could cause color issues for you if they don't in normal GL desktop
  15. glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, data);