Hello
Is there any tutorial for adding multitouch input in SDL 1.3? I cannot find
any. I’m aware that SDL 1.3 in still in developpement. Is the only solution
to look the source file?
Thank you very much
Victor–
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You can find some insight here:
http://svn.icculus.org/twilight/trunk/darkplaces/vid_sdl.c?view=markup
In particular look at the SDL_FINGERDOWN and related events, note the coords are 0-32767 across the touch surface in each direction (so the pixel aspect as it were, is not square), think of them as a
fixed point fraction from 0-1.
You can also find a function called VID_TouchScreenArea where I categorize whether any fingers are within a rectancle on the screen, and return relative motion (virtual joystick) coordinates if so, as
well as a button status (whether any fingers are in this).
It’s a bit hacked together but you might find some clues there.
Note you also receive SDL_MOUSEBUTTONDOWN/SDL_MOUSEBUTTONUP/SDL_MOUSEMOTION events for the first finger, but not any additional fingers, it is best to ignore these if you are targeting a touch-only
device.On 03/24/2011 05:48 PM, victor-victor wrote:
Hello
Is there any tutorial for adding multitouch input in SDL 1.3? I cannot find
any. I’m aware that SDL 1.3 in still in developpement. Is the only solution
to look the source file?Thank you very much
Victor
–
LordHavoc
Author of DarkPlaces Quake1 engine - http://icculus.org/twilight/darkplaces
Co-designer of Nexuiz - http://alientrap.org/nexuiz
"War does not prove who is right, it proves who is left." - Unknown
"Any sufficiently advanced technology is indistinguishable from a rigged demo." - James Klass
"A game is a series of interesting choices." - Sid Meier
Hello and thank you for your answer
You can find some insight here:
http://svn.icculus.org/twilight/trunk/darkplaces/vid_sdl.c?view=markup
However this seems a bit complicated since I see a source file; my question was to find a tutorial on this topic since I’m a bit familiar with libsdl but not at all with multitouch…
Hello
Is there any tutorial for adding multitouch input in SDL 1.3? I cannot find
any. I’m aware that SDL 1.3 in still in developpement. Is the only solution
to look the source file?Thank you very much
Victor
Victor> On 03/24/2011 05:48 PM, victor-victor wrote:
You can also look at the testgesture example:
http://hg.libsdl.org/SDL/file/default/test/testgesture.cOn Thu, Mar 24, 2011 at 6:54 PM, Forest Hale wrote:
You can find some insight here:
http://svn.icculus.org/twilight/trunk/darkplaces/vid_sdl.c?view=markupIn particular look at the SDL_FINGERDOWN and related events, note the
coords are 0-32767 across the touch surface in each direction (so the pixel
aspect as it were, is not square), think of them as a fixed point fraction
from 0-1.You can also find a function called VID_TouchScreenArea where I categorize
whether any fingers are within a rectancle on the screen, and return
relative motion (virtual joystick) coordinates if so, as well as a button
status (whether any fingers are in this).It’s a bit hacked together but you might find some clues there.
Note you also receive SDL_MOUSEBUTTONDOWN/SDL_MOUSEBUTTONUP/SDL_MOUSEMOTION
events for the first finger, but not any additional fingers, it is best to
ignore these if you are targeting a touch-only device.On 03/24/2011 05:48 PM, victor-victor wrote:
Hello
Is there any tutorial for adding multitouch input in SDL 1.3? I cannot
find
any. I’m aware that SDL 1.3 in still in developpement. Is the only
solution
to look the source file?Thank you very much
Victor
–
LordHavoc
Author of DarkPlaces Quake1 engine -
http://icculus.org/twilight/darkplaces
Co-designer of Nexuiz - http://alientrap.org/nexuiz
"War does not prove who is right, it proves who is left." - Unknown
"Any sufficiently advanced technology is indistinguishable from a rigged
demo." - James Klass
"A game is a series of interesting choices." - Sid Meier
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
–
-Sam Lantinga, Founder and CEO, Galaxy Gameworks