Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (769)
Games in Android Showcase (230)
games submitted by our members
Games in WIP (856)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  GLFW Key Event Bouncing  (Read 1355 times)
0 Members and 1 Guest are viewing this topic.
Offline unlight
« Posted 2017-02-11 04:10:17 »

Hi guys,

I have come across an issue with GLFW's key event callback function that I can't seem to work out. I have set up the following callback function:

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
glfwSetKeyCallback(Window.getWindowId(), (window, key, scancode, action, mods) ->
{
    if (action == GLFW_PRESS)
    {
        currentKeyState.put(key, true);
        System.out.print("P");
    }

    if (action == GLFW_RELEASE)
    {
        currentKeyState.put(key, false);
        System.out.print("R");
    }
});


In my main loop I am calling glfwPollEvents once per frame.

When I quickly press and release a key, I get an output of "P" followed by "R" upon release.

If I press and hold a key for more than two seconds, I get an output of "P" followed by "RPR" upon release, regardless of how long I hold the key down.

It seems to me as though the key repeat event is causing the the key press and release events to bounce?? I am moving my camera based on the key state stored in the "currentKeyState" map. When I hold a directional key, my camera will move, when I release the key, it stops for a split second, then moves a small amount due to this bouncing.

Is this behaviour expected?
Offline unlight
« Reply #1 - Posted 2017-02-11 10:19:02 »

I have just noticed that this problem occurs in Ubuntu, but not in OS X.
Offline theagentd
« Reply #2 - Posted 2017-02-11 10:37:19 »

GLFW includes GLFW_REPEAT which is for repeat keys. It could be a bug in GLFW. Consider opening a ticket on their repo on Github.

Myomyomyo.
Pages: [1]
  ignore  |  Print  
 
 

 
EgonOlsen (1668 views)
2018-06-10 19:43:48

EgonOlsen (1705 views)
2018-06-10 19:43:44

EgonOlsen (1155 views)
2018-06-10 19:43:20

DesertCoockie (1583 views)
2018-05-13 18:23:11

nelsongames (1183 views)
2018-04-24 18:15:36

nelsongames (1707 views)
2018-04-24 18:14:32

ivj94 (2531 views)
2018-03-24 14:47:39

ivj94 (1756 views)
2018-03-24 14:46:31

ivj94 (2833 views)
2018-03-24 14:43:53

Solater (969 views)
2018-03-17 05:04:08
Deployment and Packaging
by mudlee
2018-08-22 18:09:50

Java Gaming Resources
by gouessej
2018-08-22 08:19:41

Deployment and Packaging
by gouessej
2018-08-22 08:04:08

Deployment and Packaging
by gouessej
2018-08-22 08:03:45

Deployment and Packaging
by philfrei
2018-08-20 02:33:38

Deployment and Packaging
by philfrei
2018-08-20 02:29:55

Deployment and Packaging
by philfrei
2018-08-19 23:56:20

Deployment and Packaging
by philfrei
2018-08-19 23:54:46
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!