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import util.TimeOps as clock
import util.ComponentRegistry as compReg
import util.Strings as Strings
from operationscore.Input import *
class ParametricLocationInput(Input):
"""Takes three arguments: xEquation, yEquation, and useClock where
xEquation and yEquation is a parametric equation in t and returns
a value from 0 to 1, where 0 represents top/left and 1 represents
bottom/right of the lightscreen. useClock is a boolean that
specifies if the behavior should compute t based on the system
clock (value True) or should just increment t every time the
input is called."""
def clockTick(self):
return clock.time() - clock.t
def callTick(self):
self.t += 1
return self.t - 1
def inputInit(self):
self.t = 0
compReg.getLock().acquire()
xmin, ymin, xmax, ymax = compReg.getComponent('Screen').getSize()
compReg.getLock().release()
xlen = xmax-xmin
ylen = ymax-ymin
if self['useClock']:
self.t=self.clock()
self.getTime = self.clockTick
else:
self.t=0
self.getTime = self.callTick
self.x_eqn = eval('lambda t:' + str(xmin) + '+' + str(xlen) + '*(' + str(self['xEquation']) + ')')
self.y_eqn = eval('lambda t:' + str(xmin) + '+' + str(xlen) + '*(' + str(self['yEquation']) + ')')
def sensingLoop(self):
self.respond({Strings.LOCATION: (self.x_eqn(self.t), self.y_eqn(self.t))})
self.t += 1
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