Le Wed, 7 Sep 2005 14:04:10 +0000 (UTC)
Guillaume Denis a ?crit:
I have noticed that some joysticks without analog sticks return
JOYAXISMOTION events instead of JOYHATMOTION events. I am going to
make a backward conversion but I was wondering if other oddities may
You’ll never know what the user will have: only 1 hat (old joysticks), 4
axis (like playstation paddles), or both (1 hat+analog paddles).
If so, are they specific to each joystick model or are they some known
strange behaviour that I have to deal with ?
I think is is more driver/OS specific. For example, joysticks plugged on
sound card port on PC must return analog values, even if they are
digital. In this case it is done at hardware level.
Or from my personal experience, I implemented the Atari joystick driver
as emulating an analog joystick (2-axis), because I did not know what a
hat was. Then I fixed that to match the hardware reality, which was 1
For example, I guess not any joysticks return the same constant for L1
button. Are there better solutions that involving the final player or
dealing with a known database of configurations ?
Except on platforms where everyone is using the same joystick (like on
game consoles), you’ll never know what button is, and where it is on
the joystick. In fact, don’t even consider that axis 0 is horizontal,
and axis 1 is vertical.
The solution is to make it configurable which can be a tedious task, but
it is the price to pay, to have a joystick layer independent from the
Note: I did not check for Playstation 2 paddle button stuff in SDL, but
the buttons can return an analog value, not only pressed/depressed. Does
SDL consider the buttons as on/off hardware?–
Programmeur Linux, Atari
Sp?cialit?: D?veloppement, jeux