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! Peter
- Miller Puckette msp@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 script:
while true; do /home/msp/work/poolbox-leap/leap2pool |
/home/msp/pd/bin/pdsend 3000 localhost udp echo restart... sleep 1 done(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.
cheers Miller
On Tue, Mar 12, 2019 at 03:32:59PM +0100, Peter P. wrote:
- Max abonnements@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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