• 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

SDL 1.2 Engine - vsync issues in ubuntu

0 posts in this topic

I am making a game using SDL 1.2 for the cross-platform benefits. I use openGL calls for all the rendering.

I have called


before setting SDL video mode, and when I call get_attribute after everything is set up, a "1" is returned for success. In addition, if I manually configure the environment variable via an "export" of the vsync variable, then SDL properly says that the environment variable has overridden SDL settings and that Vsync is on.

Everything says that vsync is on and works, but my game still stutters in Linux...
In Windows, the game also stuttered until I added the swap_control and it became smooth as butter.


This made me believe that something was wrong fundamentally with my loop, as I read that
"A good game loop will provide the delays necessary to make Vsync unnecessary"
So I offer to you my delay method:

SDL_Delay((1000/FPS)-(SDL_GetTicks()-start_time)); //Yay stable framerate!

I had a different one, but clipped this from the internet thinking maybe that was my problem. It changed nothing.
the start_time is at the beginning of the while loop, and the FPS is set to 50 or 60, tried both.

Below is the code I use to set up my SDL video mode:


I have also tried using HW_ACCEL, SWSURFACE, and several other settings.


The following is just standard setup for 2d opengl

glMatrixMode( GL_PROJECTION );
glOrtho(0.0f, SCREEN_WIDTH, SCREEN_HEIGHT, 0.0f, -1.0f, 1.0f);

glMatrixMode( GL_MODELVIEW );
glEnable( GL_TEXTURE_2D );

glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );


glViewport( 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT );

This is pretty much all the code that goes into setup. Again, it works beautifully in windows now that I have added the vsync, but it behaves the same in Linux (Ubuntu 12.10) regardless of the vSync being set.

Also, I have gone through compiz settings to try enabling vsync, triple buffering, and other opengl options. The enabling and disabling of these options ALL had no effect on my game's small stutter.


I'm going to ask this as an aside, but it isn't the main focus of what I want from this post - so please only contribute to this part of the question if you have substantial knowledge of both versions of SDL and can offer an appropriate opinion for a 2d game (platformer)....
With the recent release of sdl 2, should I upgrade to it? My engine is set up so that I can replace it without too much trouble and I am at the beginning stages of making my game still. I know nothing at all of SDL2, but am decently familiar with 1.2. I wouldn't even use SDL were it not for the fact that I don't want to deal with wrapping OpenGL for cross platform call. I use SDL right now for event handling, image loading of PNGs and converting them to 32bit ints for gl textures, and I will eventually use it for music.

Edited by I put on my robe and...

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