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add further learnings about Ep3 B9 command

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This commit is contained in:
Martin Michelsen
2024-04-15 22:53:14 -07:00
parent d6edf1b24d
commit 1870273f89
5 changed files with 61 additions and 42 deletions
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src/CommandFormats.hh
+19 -18
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@@ -2299,19 +2299,21 @@ struct S_RankUpdate_Ep3_B7 {
struct S_UpdateMediaHeader_Ep3_B9 {
// Valid values for the type field:
// 1: GVM file
// 2: Unknown; probably BML file
// 3: Unknown; probably BML file
// 4: Unknown; appears to be completely ignored
// Any other value: entire command is ignored
// For types 2 and 3, the game looks for various tokens in the decompressed
// data; specifically '****', 'GCAM', 'GJBM', 'GJTL', 'GLIM', 'GMDM', 'GSSM',
// 'NCAM', 'NJBM', 'NJCA', 'NLIM', 'NMDM', and 'NSSM'. Of these, 'GJTL',
// 'NMDM', and 'NSSM' are found in some of the game's existing BML files, but
// the others don't seem to be anywhere on the disc. 'NJBM' is found in
// psohistory_e.sfd, but not in any other files.
// 1: Texture set (GVM file)
// 2: Model
// 3: Animation
// 4: Delete all previous media updates
// Any other value: entire command is ignored
// A texture can be displayed without a model or animation. A model requires a
// texture (sent in a separate B9 command with the same location_flags), but
// does not require an animation - it will just stand still without one. An
// animation requires both a texture and model with the same location_flags.
// For models and animations, the game looks for various tokens in the
// decompressed data; specifically '****', 'GCAM', 'GJBM', 'GJTL', 'GLIM',
// 'GMDM', 'GSSM', 'NCAM', 'NJBM', 'NJCA', 'NLIM', 'NMDM', and 'NSSM'.
le_uint32_t type = 0;
// which is a bit field specifying which positions to set. The bits are:
// location_flags is a bit field specifying where the banner or object should
// appear. The bits are:
// 00000001: South above-counter banner (facing away from teleporters)
// 00000002: West above-counter banner
// 00000004: North above-counter banner (facing toward jukebox)
@@ -2348,9 +2350,9 @@ struct S_UpdateMediaHeader_Ep3_B9 {
// banners - if a banner is sent in these locations, it appears sideways and
// halfway submerged in the floor, and has no collision. Furthermore, it seems
// that up to 8 different banners or models may be set simultaneously (though
// each may appear in more than one position). If 8 B9 commands have been
// received, further B9 commands are ignored.
le_uint32_t which = 0x00000000;
// each may appear in more than one position). If 8 banners or objects already
// exist, further media sent via B9 is ignored.
le_uint32_t location_flags = 0x00000000;
// This field specifies the size of the compressed data. The uncompressed size
// is not sent anywhere in this command.
le_uint16_t size = 0;
@@ -2361,11 +2363,10 @@ struct S_UpdateMediaHeader_Ep3_B9 {
// client ignores the command.
} __packed_ws__(S_UpdateMediaHeader_Ep3_B9, 0x0C);
// B9 (C->S): Confirm received B9 (Episode 3)
// B9 (C->S): Confirm media update (Episode 3)
// No arguments
// This command is not valid on Episode 3 Trial Edition.
// The client sends this even if it ignores the contents of a B9 command (if
// the data size was too large, or if there were already 8 banners/models).
// The client sends this even if it ignores the contents of a B9 command.
// BA: Meseta transaction (Episode 3)
// This command is not valid on Episode 3 Trial Edition.