Erratic mouse movements

SDL Development
1

Hi,

I’m currently working with the mouse in a full screen setup, and it
seems the mouse is just about impossible to use, it seems the
sensitivity of the thing is just way to high.

Is there a way to specify the sensitivity, or could i be facing a bug in
my setup somewhere? (I’m running Win2k in Vmware-player, incase that’s a
known problem area)

Cheers

2

Just a possibility here but can you scale the return values on the mouse
movements to bring them within a viable range?

Lilith

Hi,

I’m currently working with the mouse in a full screen setup, and it
seems the mouse is just about impossible to use, it seems the
sensitivity of the thing is just way to high.

Is there a way to specify the sensitivity, or could i be facing a bug
in
my setup somewhere? (I’m running Win2k in Vmware-player, incase
that’s a>>> On 12/11/2006 at 2:47 PM, in message <1165870029.15152.3.camel at localhost.localdomain>, Ochal Christophe wrote:
known problem area)

Cheers

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

3

Hi,

Just a possibility here but can you scale the return values on the mouse
movements to bring them within a viable range?

I have no idea whatsoever how to do that, is there a function for that?
Did i quick search in the sdl api reference guide on “mouse” & the
functions it returned don’t seem to allow to specify this.On Mon, 2006-12-11 at 15:04 -0600, Lilith Calbridge wrote:

Lilith

On 12/11/2006 at 2:47 PM, in message <1165870029.15152.3.camel at localhost.localdomain>, Ochal Christophe <@Ochal_Christophe> wrote:
Hi,

I’m currently working with the mouse in a full screen setup, and it
seems the mouse is just about impossible to use, it seems the
sensitivity of the thing is just way to high.

Is there a way to specify the sensitivity, or could i be facing a bug
in
my setup somewhere? (I’m running Win2k in Vmware-player, incase
that’s a
known problem area)

Cheers

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

4

Well, I’m looking at SDL_GetRelativeMouseState as the only mouse event
of import here. The x and y values returned are relative to the last
time that the function was called. So if you move the mouse in the x
direction you get a delta-x value returned. For the sake of simplicity
we’ll say it returns 100 but that’s twice as much as you think it should
be. So you set

delta-x /= 2;

to set delta-x to half of what it was. You could divide by other
numbers and perhaps floating point if you want a bit more control. Same
thing for the delta-y value.

So, instead of using the value 100 you’d be using half that or 50. You
sometimes have to do some post processing with the values the SDL
functions provide.

Lilith

Hi,

Just a possibility here but can you scale the return values on the
mouse

movements to bring them within a viable range?

I have no idea whatsoever how to do that, is there a function for
that?
Did i quick search in the sdl api reference guide on “mouse” & the
functions it returned don’t seem to allow to specify this.

Lilith

Hi,

I’m currently working with the mouse in a full screen setup, and
it

seems the mouse is just about impossible to use, it seems the
sensitivity of the thing is just way to high.

Is there a way to specify the sensitivity, or could i be facing a
bug>>> On 12/11/2006 at 3:15 PM, in message <1165871727.15152.7.camel at localhost.localdomain>, Ochal Christophe wrote:
On Mon, 2006-12-11 at 15:04 -0600, Lilith Calbridge wrote:

On 12/11/2006 at 2:47 PM, in message <1165870029.15152.3.camel at localhost.localdomain>, Ochal Christophe wrote:
in
my setup somewhere? (I’m running Win2k in Vmware-player, incase
that’s a
known problem area)

Cheers

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

SDL mailing list
SDL at libsdl.org
http://www.libsdl.org/mailman/listinfo/sdl

5

Hi,On Mon, 2006-12-11 at 15:36 -0600, Lilith Calbridge wrote:

Well, I’m looking at SDL_GetRelativeMouseState as the only mouse event
of import here. The x and y values returned are relative to the last
time that the function was called. So if you move the mouse in the x
direction you get a delta-x value returned. For the sake of simplicity
we’ll say it returns 100 but that’s twice as much as you think it should
be. So you set

delta-x /= 2;

to set delta-x to half of what it was. You could divide by other
numbers and perhaps floating point if you want a bit more control. Same
thing for the delta-y value.

So, instead of using the value 100 you’d be using half that or 50. You
sometimes have to do some post processing with the values the SDL
functions provide.

If i understand your explication correctly, that should only apply if i
were actively polling the mouse, right? At the moment i’m not polling
any events other then MOUSEBUTTONDOWN & MOUSEBUTTONUP, and the same code
in window mode seems to have no problems.

At the moment it’s not that important tho, i’ll look into this later-on.

Thx for the help tho :wink:

Cheers