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= ffi-libfreenect
FFI-based Ruby wrapper for the OpenKinect libfreenect library.
== Requirements
* ffi >= 0.5.0
== Installation
=== via Gem
(sudo)? gem install ffi-libfreenect
=== via Rake
git clone http://github.com/jgrunzweig/ffi-libfreenect.git
cd ffi-libfreenect
(sudo)? gem install jeweler
rake install
=== Synopsis
require 'freenect'
ctx = Freenect.init()
devs = ctx.num_devices
STDERR.puts "Number of Kinects detected: #{devs}"
unless devs > 0
STDERR.puts "Error: no kinect detected"
exit 1
end
STDERR.puts "Selecting device 0"
dev = ctx.open_device(0)
dev.set_led(:red) # play with the led
dev.set_tilt_degrees(30) # tilt up to max
sleep 1
dev.set_tilt_degrees(-30) # tilt down to max
sleep 1
dev.set_tilt_degrees(0.0) # tilt back to center
sleep 1
dev.set_led(:green) # play with the led
# Actual video and depth capture work similarly to eachother.
# But they're still both pretty un-sugary.
#
# Future versions will probably abstract this and try to make it more
# ruby-ish.
#
# The example below shows how to write a single video frame to a PPM file.
dev.depth_mode = Freenect.depth_mode(:medium, :depth_11bit)
dev.video_mode = Freenect.video_mode(:medium, :rgb)
dev.start_depth()
dev.start_video()
$snapshot_finished = nil
STDERR.puts "Taking snapshot"
dev.set_video_callback do |device, video, timestamp|
if not $snapshot_finished
fname = "%u.ppm" % timestamp
STDERR.puts "Writing #{fname}"
File.open(fname, "w") do |f|
f.puts("P6 %d %d 255\n" % [ dev.video_mode.width, dev.video_mode.height ] )
f.write(video.read_string_length(dev.video_mode.bytes))
end
$snapshot_finished = true
end
end
until $snapshot_finished
break if (ctx.process_events < 0)
end
dev.set_led(:off)
dev.stop_depth
dev.stop_video
dev.close
ctx.close
== Copyright
Copyright (c) 2010 Josh Grunzweig & Eric Monti. See LICENSE.txt for details.
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