sea.py

#!/usr/bin/env python

from math import cos, sin, pi
from time import sleep, time
import sys, os, signal

if len(sys.argv) < 2:
	device_id = os.popen("xinput list | sed -rn 's/^.*mouse.*id=([0-9]+).*$/\\1/ip; T; Q'").read().rstrip('\n')
else:
	device_id = sys.argv[1]

if len(sys.argv) < 3:
	property_id = os.popen("xinput list-props %s | sed -rn 's/^.*matrix.*\(([0-9]+)\).*$/\\1/ip; T; Q'" % device_id).read().rstrip('\n')
else:
	property_id = sys.argv[2]

print "device id = %s" % device_id
print "property id = %s" % property_id

degree = pi / 180

period = 2 # seconds
amplitude = 20 * degree

try:
	while True:
		t = time()
		f = cos(t * pi * 2 / period) * amplitude

		assert not os.system("xinput set-prop %s %s %s, %s, 0, %s, %s, 0, 0, 0, 1" % (device_id, property_id, cos(f), -sin(f), sin(f), cos(f)))

		sleep(0.1)
except KeyboardInterrupt:
	assert not os.system("xinput set-prop %s %s 1, 0, 0, 0, 1, 0, 0, 0, 1" % (device_id, property_id))