Source code for direct.cluster.ClusterServer

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

# 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 globalClock.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 == 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 globalClock.setFrameCount(frameCount) globalClock.setFrameTime(frameTime) globalClock.setDt(dt)
[docs] def handleCommandString(self, dgi): """ Handle arbitrary command string from client """ command = self.msgHandler.parseCommandStringDatagram(dgi) try: exec(command, __builtins__) except: pass