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0x4E — BG_QUERY

Queries background animation state (GetPlayingAnimationFrame, CVector::GetEuler, CQuaternion::ToEuler) and reads/writes script event values with the result.

proven— handler traced, and exercised by at least one shipped script.

At a glance

Opcode0x4E (78)
HandlerCRadiScript::Command_4e
SignatureCRadiScript::Command_4e(int,SCR_DATA*,unsigned int,unsigned int)
Translation unitr_script_run4.cpp
Address— debug build; click for all 3
Handler size0x410 (1040 bytes)
FamilyBackground, map, landscape and camera
Command size4 + extra_words * 4 bytes

Handler behaviour

Queries background animation state (GetPlayingAnimationFrame, CVector::GetEuler, CQuaternion::ToEuler) and reads/writes script event values with the result.

Encoding

The command header is one 32-bit word, as described in §3 Instruction encoding:

 31            24 23            16 15             8 7              0
+----------------+----------------+----------------+----------------+
|  flags         |  argument byte |  extra words   |  0x4E          |
+----------------+----------------+----------------+----------------+

Bits 8–15 give the number of 32-bit operand words that follow. Bits 16–23 are handed to the handler as a bitfield; on character commands bit 0 normally says whether a character selector word is present. Bit 31 is the keep-going bit.

Engine calls

Engine functions this handler was observed calling:

  • CRadiScript::SetEventValueForScript