UpdateTransformMessage

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Revision as of 10:17, 10 April 2007 by Exca (Talk | contribs) (Struct)

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Struct


SHORT Operand_Count
INT Opcode
LONG ObjectID
SHORT PositionX
SHORT PositionZ
SHORT PositionY
INT UpdateCounter
BYTE ??
BYTE Direction

Variable Descriptions


Opperand_Count = 8

Opcode = 1B24F808


  • ObjectID:
ObjectID that you are listing attributes for.
  • Position X / Z / Y:
New Position of Object. The value is transformed the following way.
(Coordinate * 4) = Position
(Position / 4) = Coordinate
This is done to utilize variable size to prevent moving anywhere outside of the map.
Range of map = 16,000
Range of SHORT = 64,000
64/16 = 4
  • UpdateCounter:
Number of movement updates the object has done.
Used to distinguish new updates from potential repeats.
Incremented by 1 each packet.
  • '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.
It appears the unknown byte is some sort of server-side interpolation variable.
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
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.
TODO: Look into this byte more...

Tags


S→C This packet originates on the server.

75% This packet has been partially reversed.


Sample Code

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Sample Packet

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