from panda3d.core import *
from .ClusterMsgs import *
from direct.distributed.MsgTypes import *
from direct.directnotify import DirectNotifyGlobal
from direct.showbase import DirectObject
from direct.task import Task
from direct.task.TaskManagerGlobal import taskMgr
# NOTE: This assumes the following variables are set via bootstrap command line
# arguments on server startup:
# clusterServerPort
# clusterSyncFlag
# clusterDaemonClient
# clusterDaemonPort
# Also, I'm not sure multiple camera-group configurations are working for the
# cluster system.
[docs]class ClusterServer(DirectObject.DirectObject):
notify = DirectNotifyGlobal.directNotify.newCategory("ClusterServer")
MSG_NUM = 2000000
[docs] def __init__(self, cameraJig, camera):
global clusterServerPort, clusterSyncFlag
global clusterDaemonClient, clusterDaemonPort
# Store information about the cluster's camera
self.cameraJig = cameraJig
self.camera = camera
self.lens = camera.node().getLens()
self.lastConnection = None
self.fPosReceived = 0
# Create network layer objects
self.qcm = QueuedConnectionManager()
self.qcl = QueuedConnectionListener(self.qcm, 0)
self.qcr = QueuedConnectionReader(self.qcm, 0)
self.cw = ConnectionWriter(self.qcm, 0)
try:
port = clusterServerPort
except NameError:
port = CLUSTER_SERVER_PORT
self.tcpRendezvous = self.qcm.openTCPServerRendezvous(port, 1)
self.qcl.addConnection(self.tcpRendezvous)
self.msgHandler = ClusterMsgHandler(ClusterServer.MSG_NUM, self.notify)
# Start cluster tasks
self.startListenerPollTask()
self.startReaderPollTask()
# If synchronized server, start swap coordinator too
try:
clusterSyncFlag
except NameError:
clusterSyncFlag = 0
if clusterSyncFlag:
self.startSwapCoordinator()
base.graphicsEngine.setAutoFlip(0)
# Set global clock mode to slave mode
ClockObject.getGlobalClock().setMode(ClockObject.MSlave)
# Send verification of startup to client
self.daemon = DirectD()
self.objectMappings = {}
self.objectHasColor = {}
self.controlMappings = {}
self.controlPriorities = {}
self.controlOffsets = {}
self.messageQueue = []
self.sortedControlMappings = []
# These must be passed in as bootstrap arguments and stored in
# the __builtins__ namespace
try:
clusterDaemonClient
except NameError:
clusterDaemonClient = 'localhost'
try:
clusterDaemonPort
except NameError:
clusterDaemonPort = CLUSTER_DAEMON_PORT
self.daemon.serverReady(clusterDaemonClient, clusterDaemonPort)
[docs] def startListenerPollTask(self):
# Run this task near the start of frame, sometime after the dataLoop
taskMgr.add(self.listenerPollTask, "serverListenerPollTask", -40)
[docs] def listenerPollTask(self, task):
""" Task to listen for a new connection from the client """
# Run this task after the dataLoop
if self.qcl.newConnectionAvailable():
self.notify.info("New connection is available")
rendezvous = PointerToConnection()
netAddress = NetAddress()
newConnection = PointerToConnection()
if self.qcl.getNewConnection(rendezvous, netAddress, newConnection):
# Crazy dereferencing
newConnection=newConnection.p()
self.qcr.addConnection(newConnection)
self.lastConnection = newConnection
self.notify.info("Got a connection!")
else:
self.notify.warning("getNewConnection returned false")
return Task.cont
[docs] def addNamedObjectMapping(self, object, name, hasColor = True,
priority = 0):
if name not in self.objectMappings:
self.objectMappings[name] = object
self.objectHasColor[name] = hasColor
else:
self.notify.debug('attempt to add duplicate named object: '+name)
[docs] def removeObjectMapping(self, name):
if name in self.objectMappings:
self.objectMappings.pop(name)
[docs] def redoSortedPriorities(self):
self.sortedControlMappings = []
for key in self.objectMappings:
self.sortedControlMappings.append([self.controlPriorities[key],
key])
self.sortedControlMappings.sort()
[docs] def addControlMapping(self, objectName, controlledName, offset = None,
priority = 0):
if objectName not in self.controlMappings:
self.controlMappings[objectName] = controlledName
if offset is None:
offset = Vec3(0,0,0)
self.controlOffsets[objectName] = offset
self.controlPriorities[objectName] = priority
self.redoSortedPriorities()
else:
self.notify.debug('attempt to add duplicate controlled object: '+name)
[docs] def setControlMappingOffset(self, objectName, offset):
if objectName in self.controlMappings:
self.controlOffsets[objectName] = offset
[docs] def removeControlMapping(self, name):
if name in self.controlMappings:
self.controlMappings.pop(name)
self.controlPriorities.pop(name)
self.redoSortedPriorities()
[docs] def startControlObjectTask(self):
self.notify.debug("moving control objects")
taskMgr.add(self.controlObjectTask,"controlObjectTask",50)
[docs] def controlObjectTask(self, task):
#print "running control object task"
for pair in self.sortedControlPriorities:
object = pair[1]
name = self.controlMappings[object]
if object in self.objectMappings:
self.moveObject(self.objectMappings[object],name,self.controlOffsets[object],
self.objectHasColor[object])
self.sendNamedMovementDone()
return Task.cont
[docs] def sendNamedMovementDone(self):
self.notify.debug("named movement done")
datagram = self.msgHandler.makeNamedMovementDone()
self.cw.send(datagram,self.lastConnection)
[docs] def moveObject(self, nodePath, object, offset, hasColor):
self.notify.debug('moving object '+object)
#print "moving object",object
xyz = nodePath.getPos(render) + offset
hpr = nodePath.getHpr(render)
scale = nodePath.getScale(render)
if hasColor:
color = nodePath.getColor()
else:
color = [1,1,1,1]
hidden = nodePath.isHidden()
datagram = self.msgHandler.makeNamedObjectMovementDatagram(xyz,hpr,scale,color,hidden,object)
self.cw.send(datagram, self.lastConnection)
[docs] def startReaderPollTask(self):
""" Task to handle datagrams from client """
# Run this task just after the listener poll task
if clusterSyncFlag:
# Sync version
taskMgr.add(self._syncReaderPollTask, "serverReaderPollTask", -39)
else:
# Asynchronous version
taskMgr.add(self._readerPollTask, "serverReaderPollTask", -39)
def _readerPollTask(self, state):
""" Non blocking task to read all available datagrams """
while 1:
(datagram, dgi, type) = self.msgHandler.nonBlockingRead(self.qcr)
# Queue is empty, done for now
if type is CLUSTER_NONE:
break
else:
# Got a datagram, handle it
self.handleDatagram(dgi, type)
return Task.cont
def _syncReaderPollTask(self, task):
if self.lastConnection is None:
pass
elif self.qcr.isConnectionOk(self.lastConnection):
# Process datagrams till you get a postion update
type = CLUSTER_NONE
while type != CLUSTER_CAM_MOVEMENT:
# Block until you get a new datagram
(datagram, dgi, type) = self.msgHandler.blockingRead(self.qcr)
# Process datagram
self.handleDatagram(dgi, type)
return Task.cont
[docs] def startSwapCoordinator(self):
taskMgr.add(self.swapCoordinatorTask, "serverSwapCoordinator", 51)
[docs] def swapCoordinatorTask(self, task):
if self.fPosReceived:
self.fPosReceived = 0
# Alert client that this server is ready to swap
self.sendSwapReady()
# Wait for swap command (processing any intermediate datagrams)
while 1:
(datagram, dgi, type) = self.msgHandler.blockingRead(self.qcr)
self.handleDatagram(dgi, type)
if type == CLUSTER_SWAP_NOW:
break
return Task.cont
[docs] def sendSwapReady(self):
self.notify.debug(
'send swap ready packet %d' % self.msgHandler.packetNumber)
datagram = self.msgHandler.makeSwapReadyDatagram()
self.cw.send(datagram, self.lastConnection)
[docs] def handleDatagram(self, dgi, type):
""" Process a datagram depending upon type flag """
if type == CLUSTER_NONE:
pass
elif type == CLUSTER_EXIT:
print('GOT EXIT')
import sys
sys.exit()
elif type == CLUSTER_CAM_OFFSET:
self.handleCamOffset(dgi)
elif type == CLUSTER_CAM_FRUSTUM:
self.handleCamFrustum(dgi)
elif type == CLUSTER_CAM_MOVEMENT:
self.handleCamMovement(dgi)
elif type == CLUSTER_SELECTED_MOVEMENT:
self.handleSelectedMovement(dgi)
elif type == CLUSTER_COMMAND_STRING:
self.handleCommandString(dgi)
elif type == CLUSTER_SWAP_READY:
pass
elif type == CLUSTER_SWAP_NOW:
self.notify.debug('swapping')
base.graphicsEngine.flipFrame()
elif type == CLUSTER_TIME_DATA:
self.notify.debug('time data')
self.handleTimeData(dgi)
elif type == CLUSTER_NAMED_OBJECT_MOVEMENT:
self.messageQueue.append(self.msgHandler.parseNamedMovementDatagram(dgi))
#self.handleNamedMovement(dgi)
elif type == CLUSTER_NAMED_MOVEMENT_DONE:
#print "got done",self.messageQueue
#if (len(self.messageQueue) > 0):
# print self.messageQueue[0]
# print dir(self.messageQueue)
self.handleMessageQueue()
else:
self.notify.warning("Received unknown packet type:" % type)
return type
# Server specific tasks
[docs] def handleCamOffset(self, dgi):
""" Set offset of camera from cameraJig """
(x, y, z, h, p, r) = self.msgHandler.parseCamOffsetDatagram(dgi)
self.camera.setPos(x,y,z)
self.lens.setViewHpr(h, p, r)
[docs] def handleCamFrustum(self, dgi):
""" Adjust camera frustum based on parameters sent by client """
(fl, fs, fo) = self.msgHandler.parseCamFrustumDatagram(dgi)
self.lens.setFocalLength(fl)
self.lens.setFilmSize(fs[0], fs[1])
self.lens.setFilmOffset(fo[0], fo[1])
[docs] def handleNamedMovement(self, data):
""" Update cameraJig position to reflect latest position """
(name,x, y, z, h, p, r,sx,sy,sz, red, g, b, a, hidden) = data
if name in self.objectMappings:
self.objectMappings[name].setPosHpr(render, x, y, z, h, p, r)
self.objectMappings[name].setScale(render,sx,sy,sz)
self.objectMappings[name].setColor(red,g,b,a)
if hidden:
self.objectMappings[name].hide()
else:
self.objectMappings[name].show()
else:
self.notify.debug("recieved unknown named object command: "+name)
[docs] def handleMessageQueue(self):
#print self.messageQueue
for data in self.messageQueue:
#print "in queue",dgi
self.handleNamedMovement(data)
self.messageQueue = []
[docs] def handleCamMovement(self, dgi):
""" Update cameraJig position to reflect latest position """
(x, y, z, h, p, r) = self.msgHandler.parseCamMovementDatagram(dgi)
self.cameraJig.setPosHpr(render, x, y, z, h, p, r)
self.fPosReceived = 1
[docs] def handleSelectedMovement(self, dgi):
""" Update cameraJig position to reflect latest position """
(x, y, z, h, p, r, sx, sy, sz) = self.msgHandler.parseSelectedMovementDatagram(
dgi)
if last:
last.setPosHprScale(x, y, z, h, p, r, sx, sy, sz)
[docs] def handleTimeData(self, dgi):
""" Update cameraJig position to reflect latest position """
(frameCount, frameTime, dt) = self.msgHandler.parseTimeDataDatagram(dgi)
# Use frame time from client for both real and frame time
clock = ClockObject.getGlobalClock()
clock.setFrameCount(frameCount)
clock.setFrameTime(frameTime)
clock.dt = dt
[docs] def handleCommandString(self, dgi):
""" Handle arbitrary command string from client """
command = self.msgHandler.parseCommandStringDatagram(dgi)
try:
exec(command, __builtins__)
except:
pass
