Difference between revisions of "UpdateTransformMessage"

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__NOTOC__
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{{PageHeader|Server Packet|UpdateTransformMessage (1B24F808)}}
−
 
+
 
{| border="0" width="90%" cellpadding=6
 
{| border="0" width="90%" cellpadding=6
 
|-
 
|-
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===Struct===
 
===Struct===
 
----
 
----
−
 
+
{| align="center"
 +
|-
 +
||
 
{| class="wikitable"
 
{| class="wikitable"
−
|{{short}}||'''Operand_Count'''
+
|{{short}}||'''Op Count'''
 
|-
 
|-
 
|{{int}}||'''Opcode'''
 
|{{int}}||'''Opcode'''
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|-
 
|-
 
|{{short}}||'''PositionX'''
 
|{{short}}||'''PositionX'''
−
|-
 
−
|{{short}}||'''PositionZ'''
 
 
|-
 
|-
 
|{{short}}||'''PositionY'''
 
|{{short}}||'''PositionY'''
 +
|-
 +
|{{short}}||'''PositionZ'''
 
|-
 
|-
 
|{{int}}||'''UpdateCounter'''
 
|{{int}}||'''UpdateCounter'''
 
|-
 
|-
−
|{{byte}}|{{unknown}}
+
|{{byte}}||'''Posture'''
 
|-
 
|-
 
|{{byte}}||'''Direction'''
 
|{{byte}}||'''Direction'''
 +
|}
 
|}
 
|}
  
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:ObjectID that you are listing attributes for.
 
:ObjectID that you are listing attributes for.
  
−
* '''Position X / Z / Y''':
+
* '''Position X / Y / Z''':
 
:New Position of Object. The value is transformed the following way.
 
:New Position of Object. The value is transformed the following way.
 
<pre>
 
<pre>
−
(Coordinate * 4) = Position
+
n = X / 4;
−
(Position / 4) = Coordinate
+
if n > 8192 n = n - 16384;
−
This is done to utilize variable size to prevent moving anywhere outside of the map.
+
effective map range is -8192..8192
−
Range of map = 16,000
+
 
−
Range of SHORT = 64,000
+
to convert the a float to position
−
64/16 = 4
+
n = uint16(x * 4.0f + 0.5f);
 
</pre>
 
</pre>
  
Line 54: Line 56:
 
:Incremented by 1 each packet.
 
:Incremented by 1 each packet.
  
−
* '''Direction'':
+
* '''Posture''':
 +
The byte before direction corresponds to:
 +
 
 +
{| align="center"
 +
|-
 +
||
 +
{| class="wikitable"
 +
|- align="center" style="background-color:#ffffcc;"
 +
|width="30px"|'''ID'''||width="140px"|'''Name'''||width="30px"|'''ID'''||width="140px"|'''Name'''
 +
|- align="center"
 +
||'''-1'''||Invalid||'''10'''||Climbing
 +
|- align="center" style="background-color:#F1F1F1;"
 +
||'''0'''||Standing||'''11'''||Hovering
 +
|- align="center"
 +
||'''1'''||Sneaking||'''12'''||Flying
 +
|- align="center" style="background-color:#F1F1F1;"
 +
||'''2'''||Walking||'''13'''||LyingDown
 +
|- align="center"
 +
||'''3'''||Running||'''14'''||Sitting
 +
|- align="center" style="background-color:#F1F1F1;"
 +
||'''4'''||Kneeling||'''15'''||SkillAnimating
 +
|- align="center"
 +
||'''5'''||CrouchSneaking||'''16'''||DrivingVehicle
 +
|- align="center" style="background-color:#F1F1F1;"
 +
||'''6'''||CrouchWalking||'''17'''||RidingCreature
 +
|- align="center"
 +
||'''7'''||Prone||'''18'''||KnockedDown
 +
|- align="center" style="background-color:#F1F1F1;"
 +
||'''8'''||Crawling||'''19'''||Incapacitated
 +
|- align="center"
 +
||'''9'''||ClimbingStationary / dancing!!!||'''20'''||Dead
 +
|- align="center" style="background-color:#F1F1F1;"
 +
|| || ||'''21'''||Blocking
 +
|}
 +
|}
 +
 
 +
Haven't seen it out side the range of 0..5 yet
 +
 
 +
* '''Direction''':
 
:This is the direction for the object to face after moving.
 
:This is the direction for the object to face after moving.
 
:It is calculated by (Angle / 0.0625) where angle is in radians.
 
:It is calculated by (Angle / 0.0625) where angle is in radians.
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:This packet needs to be sent frequently to prevent start/stop in a movement stream.
 
:This packet needs to be sent frequently to prevent start/stop in a movement stream.
 
:Also, shorter distances at slower frequency will create slower speed.
 
:Also, shorter distances at slower frequency will create slower speed.
−
:
+
 
−
:It appears the unknown byte is some sort of server-side interpolation variable. 
+
''':OLD--DATA--Found this to be the posture byte'''
−
:It doesnt have any affect on the client, as far as we can tell.
+
−
:
+
 
:This byte seems to be related to the 2 variances of ObjController Transform Packets
 
:This byte seems to be related to the 2 variances of ObjController Transform Packets
 
:used (23 vs 21). See them for further detail. The 23 seems to be sent
 
:used (23 vs 21). See them for further detail. The 23 seems to be sent
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:count of 21's the occur between a group of 23. The 23 is assumed to be start/end
 
:count of 21's the occur between a group of 23. The 23 is assumed to be start/end
 
:of a chain of movement while the 21 is an update.
 
:of a chain of movement while the 21 is an update.
−
:'''<font color=red>TODO</font>''': Look into this byte more...
+
-
 
|valign=top|
 
|valign=top|
 +
 
===Tags===
 
===Tags===
 
----
 
----
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||{{ServerPacket}}
 
||{{ServerPacket}}
 
|-
 
|-
−
||{{75%}}
+
||{{100%}}
 
|-
 
|-
 
|}
 
|}
−
 
 
|}
 
|}
−
 
 
----
 
----
−
 
−
==Sample Code==
 
−
 
−
<pre>
 
−
Insert Code Snippet Here...
 
−
</pre>
 
  
 
==Sample Packet==
 
==Sample Packet==
  
 
<pre>
 
<pre>
−
Insert Sample Packet Here...
+
08 00 // op count
 +
08 F8 24 1B // UpdateTransformMessage
 +
EB 4F 90 19 17 00 00 00 // object ID
 +
AD CF // x
 +
7C 00 // y
 +
CB 2B // z
 +
03 03 00 00 // counter
 +
00 // posture
 +
2F // direction
 
</pre>
 
</pre>

Latest revision as of 14:07, 24 January 2008

Server Packet - UpdateTransformMessage (1B24F808)

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Struct

SHORT Op Count
INT Opcode
LONG ObjectID
SHORT PositionX
SHORT PositionY
SHORT PositionZ
INT UpdateCounter
BYTE Posture
BYTE Direction

Variable Descriptions

Opperand_Count = 8

Opcode = 1B24F808

  • ObjectID:
ObjectID that you are listing attributes for.
  • Position X / Y / Z:
New Position of Object. The value is transformed the following way.
n = X / 4;
if n > 8192 n = n - 16384; 
effective map range is -8192..8192

to convert the a float to position
n = uint16(x * 4.0f + 0.5f);
  • UpdateCounter:
Number of movement updates the object has done.
Used to distinguish new updates from potential repeats.
Incremented by 1 each packet.
  • Posture:

The byte before direction corresponds to:

ID Name ID Name
-1 Invalid 10 Climbing
0 Standing 11 Hovering
1 Sneaking 12 Flying
2 Walking 13 LyingDown
3 Running 14 Sitting
4 Kneeling 15 SkillAnimating
5 CrouchSneaking 16 DrivingVehicle
6 CrouchWalking 17 RidingCreature
7 Prone 18 KnockedDown
8 Crawling 19 Incapacitated
9 ClimbingStationary / dancing!!! 20 Dead
21 Blocking

Haven't seen it out side the range of 0..5 yet

  • Direction:
This is the direction for the object to face after moving.
It is calculated by (Angle / 0.0625) where angle is in radians.
    • Additional Notes:
This packet needs to be sent frequently to prevent start/stop in a movement stream.
Also, shorter distances at slower frequency will create slower speed.

:OLD--DATA--Found this to be the posture byte

This byte seems to be related to the 2 variances of ObjController Transform Packets
used (23 vs 21). See them for further detail. The 23 seems to be sent
in a Data channel signifying it being important. This byte is related to a
count of 21's the occur between a group of 23. The 23 is assumed to be start/end
of a chain of movement while the 21 is an update.

-

Tags

S→C This packet originates on the server.

100% This packet has been completely reversed.

Sample Packet

08 00 // op count
08 F8 24 1B // UpdateTransformMessage
EB 4F 90 19 17 00 00 00 // object ID
AD CF // x
7C 00 // y
CB 2B // z
03 03 00 00 // counter
00 // posture
2F // direction
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