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support for arbitrary timescales for network timestamps

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This commit is contained in:
Darren Ranalli 2004-06-30 22:44:15 +00:00
parent ab6449b623
commit b0731772c1
1 changed files with 21 additions and 14 deletions
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35
direct/src/distributed/ClockDelta.py
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@ -218,7 +218,8 @@ class ClockDelta(DirectObject.DirectObject):
### Primary interface functions ###
def networkToLocalTime(self, networkTime, now = None, bits = 16):
def networkToLocalTime(self, networkTime, now = None, bits = 16,
ticksPerSec=NetworkTimePrecision):
"""networkToLocalTime(self, int networkTime)
Converts the indicated networkTime to the corresponding
@ -234,11 +235,10 @@ class ClockDelta(DirectObject.DirectObject):
return now
# First, determine what network time we have for 'now'.
ntime = int(math.floor((now - self.delta) * NetworkTimePrecision + 0.5))
ntime = int(math.floor(((now - self.delta) * ticksPerSec) + 0.5))
# The signed difference between these is the number of units
# of NetworkTimePrecision by which the network time differs
# from 'now'.
# The signed difference between these is the number of ticks
# by which the network time differs from 'now'.
if bits == 16:
diff = self.__signExtend(networkTime - ntime)
@ -249,15 +249,16 @@ class ClockDelta(DirectObject.DirectObject):
diff = networkTime - ntime
return now + float(diff) / NetworkTimePrecision
return now + float(diff) / ticksPerSec
def localToNetworkTime(self, localTime, bits = 16):
def localToNetworkTime(self, localTime, bits = 16,
ticksPerSec=NetworkTimePrecision):
"""localToNetworkTime(self, float localTime)
Converts the indicated localTime to the corresponding
networkTime value.
"""
ntime = int(math.floor((localTime - self.delta) * NetworkTimePrecision + 0.5))
ntime = int(math.floor(((localTime - self.delta) * ticksPerSec) + 0.5))
if bits == 16:
return self.__signExtend(ntime)
@ -270,23 +271,28 @@ class ClockDelta(DirectObject.DirectObject):
### Convenience functions ###
def getRealNetworkTime(self, bits=16):
def getRealNetworkTime(self, bits=16,
ticksPerSec=NetworkTimePrecision):
"""getRealNetworkTime(self)
Returns the current getRealTime() expressed as a network time.
"""
return self.localToNetworkTime(self.globalClock.getRealTime(),
bits=bits)
bits=bits,
ticksPerSec=ticksPerSec)
def getFrameNetworkTime(self, bits=16):
def getFrameNetworkTime(self, bits=16,
ticksPerSec=NetworkTimePrecision):
"""getFrameNetworkTime(self)
Returns the current getFrameTime() expressed as a network time.
"""
return self.localToNetworkTime(self.globalClock.getFrameTime(),
bits=bits)
bits=bits,
ticksPerSec=ticksPerSec)
def localElapsedTime(self, networkTime, bits=16):
def localElapsedTime(self, networkTime, bits=16,
ticksPerSec=NetworkTimePrecision):
"""localElapsedTime(self, int networkTime)
Returns the amount of time elapsed (in seconds) on the client
@ -295,7 +301,8 @@ class ClockDelta(DirectObject.DirectObject):
"""
now = self.globalClock.getFrameTime()
dt = now - self.networkToLocalTime(networkTime, now, bits=bits)
dt = now - self.networkToLocalTime(networkTime, now, bits=bits,
ticksPerSec=ticksPerSec)
return max(dt, 0.0)