[PD] status of leap motion controller in Pd, especially on Linux? - another way
peterparker at fastmail.com
Sat Jun 8 15:03:54 CEST 2019
Thanks Miller, I now found the time to try your approach and it is
indeed a nice one! Three quick questions arise:
If I don't terminate the output of the Sample.cpp program with a
semicolon it also works. Is there a difference?
What would be the best formatting to save as much network traffic as
possible? I discover that Pd (wish, for that matter) consumes quite a
lot of cpu when receiving tracking data. Do newlines make a difference?
Did you manage to get rid of commas or parentheses in Sample.cpp's
output? I can't seem to find a way to do it but it would help
tremendously to parse the data in Pd with [route] and [unpack].
Curious and excited, with thanks!
* Miller Puckette <msp at ucsd.edu> [2019-03-12 17:22]:
> Hi all -
> I didn't have much trouble ust compiling the "Sample.cpp" example in the
> 2.3 development kit; this prints lots of stuff on standard output. I then
> changed the print statements in the code to only print out the numbers I
> cared about with a trailingsemicolon, then piped to "pdsend", giving it
> a UDP port in my patch.
> Because the sample program sometimes just quits I make an auto-restarting
> while true; do
> /home/msp/work/poolbox-leap/leap2pool |\
> /home/msp/pd/bin/pdsend 3000 localhost udp
> echo restart...
> sleep 1
> (where "leap2pool" is my version of Sample.cpp). I think this is pretty
> robust - if a leap extern in Pd decided to crash it would takePd down but
> the way I do it I only lose a second of connection.
> On Tue, Mar 12, 2019 at 03:32:59PM +0100, Peter P. wrote:
> > * Max <abonnements at revolwear.com> [2019-03-12 15:18]:
> > > I think you need to start pd with the leap library preloaded:
> > >
> > > LD_PRELOAD=~/path/to/LeapDeveloperKit/LeapSDK/lib/x64/libLeap.so
> > > ~/path/to/pd/bin/pd ~/path/to/patch.pd
> > Thanks Max, that's what I already did in the call to the debugger:
> > $ gdb --args LD_PRELOAD=LeapDeveloperKit_2.3.1+31549_linux/LeapSDK/lib/x64/libLeap.so /usr/bin/pd -path linux64bit Pd_leapmotion_0.1_mac/leap_motion_help.pd
> > Without debugger the external fails indeed without that line.
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