From ebf7be4920b0dbe1141d352ec2896ed0ebff0ce4 Mon Sep 17 00:00:00 2001
From: Darren Ranalli <github@dranalli.com>
Date: Sat, 4 Dec 2004 01:49:16 +0000
Subject: [PATCH] support for multiple levels on single client

---
 direct/src/level/DistributedEntityAI.py |  3 +-
 direct/src/level/EditorGlobals.py       | 39 +++++++++++++++++--------
 direct/src/level/Entity.py              |  7 +++++
 direct/src/level/Level.py               |  7 +++++
 4 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/direct/src/level/DistributedEntityAI.py b/direct/src/level/DistributedEntityAI.py
index 4ec6066b41..17ffb1aa30 100755
--- a/direct/src/level/DistributedEntityAI.py
+++ b/direct/src/level/DistributedEntityAI.py
@@ -39,4 +39,5 @@ class DistributedEntityAI(DistributedObjectAI.DistributedObjectAI,
             self.parentEntId = parentEntId
             # switch to new zone
             newZoneId = self.getZoneEntity().getZoneId()
-            self.sendSetZone(newZoneId)
+            if newZoneId != self.zoneId:
+                self.sendSetZone(newZoneId)
diff --git a/direct/src/level/EditorGlobals.py b/direct/src/level/EditorGlobals.py
index 6e51c21abd..3503cd049a 100755
--- a/direct/src/level/EditorGlobals.py
+++ b/direct/src/level/EditorGlobals.py
@@ -2,16 +2,22 @@
 
 from direct.showbase.PythonUtil import uniqueElements
 
+# levels should put themselves into the bboard under this posting
+# to assert themselves as the level to be edited by ~edit
+EditTargetPostName = 'inGameEditTarget'
+
 EntIdRange = 10000
 # Once a range has been assigned to a user, please don't change it.
 username2entIdBase = {
-    'darren': 1*EntIdRange,
-    'samir':  2*EntIdRange,
-    'skyler': 3*EntIdRange,
-    'joe':    4*EntIdRange,
-    'DrEvil': 5*EntIdRange,
-    'asad':   6*EntIdRange,
-    'drose':  7*EntIdRange,
+    'darren':   1*EntIdRange,
+    'samir':    2*EntIdRange,
+    'skyler':   3*EntIdRange,
+    'joe':      4*EntIdRange,
+    'DrEvil':   5*EntIdRange,
+    'asad':     6*EntIdRange,
+    'drose':    7*EntIdRange,
+    'pappy':    8*EntIdRange,
+    'patricia': 9*EntIdRange,
     }
 assert uniqueElements(username2entIdBase.values())
 
@@ -20,12 +26,21 @@ undefinedUsername = 'UNDEFINED_USERNAME'
 editUsername = config.GetString(usernameConfigVar, undefinedUsername)
 
 # call this to make sure things have been set up correctly
-def assertReadyToEdit():
-    assert editUsername != undefinedUsername, (
-        "you must config '%s'; see %s.py" % (usernameConfigVar, __name__))
+def checkNotReadyToEdit():
+    # returns error string if not ready, None if ready
+    if editUsername == undefinedUsername:
+        return "you must config '%s'; see %s.py" % (
+            usernameConfigVar, __name__)
     # Feel free to add your name to the table if it's not in there
-    assert editUsername in username2entIdBase, (
-        "unknown editor username '%s'; see %s.py" % (editUsername, __name__))
+    if editUsername not in username2entIdBase:
+        return "unknown editor username '%s'; see %s.py" % (
+            editUsername, __name__)
+    return None
+
+def assertReadyToEdit():
+    msg = checkNotReadyToEdit()
+    if msg is not None:
+        assert False, msg
 
 def getEditUsername():
     return editUsername
diff --git a/direct/src/level/Entity.py b/direct/src/level/Entity.py
index 4b2fc387b5..e6bf428eef 100755
--- a/direct/src/level/Entity.py
+++ b/direct/src/level/Entity.py
@@ -56,6 +56,13 @@ class Entity(DirectObject):
             entId = self.entId
         return '%s-%s-%s' % (name, self.level.levelId, entId)
 
+    def getParentToken(self):
+        """returns a value that uniquely identifies this entity for purposes
+        of distributed parenting"""
+        # give the level the option of modifying our entId, to handle instances
+        # where there are multiple levels present on the client simultaneously
+        return self.level.getParentTokenForEntity(self.entId)
+
     def getOutputEventName(self, entId=None):
         """returns the event generated by an entity; defaults to this entity"""
         if entId is None:
diff --git a/direct/src/level/Level.py b/direct/src/level/Level.py
index cf5ff91377..681bec64b7 100755
--- a/direct/src/level/Level.py
+++ b/direct/src/level/Level.py
@@ -251,6 +251,13 @@ class Level:
         """returns the model zoneNum that corresponds to a network zoneId"""
         return self.zoneId2zoneNum[zoneId]
 
+    def getParentTokenForEntity(self, entId):
+        """returns a unique parent token for this entity"""
+        # default impl
+        # subclasses can override to allow for multiple levels present
+        # on the client simultaneously
+        return entId
+
     # these events are thrown as the level initializes itself
     # LEVEL
     def getLevelPreCreateEvent(self):