AGSC (File Format): Difference between revisions

AGSC (File Format) (view source)

256 bytes removed , 16 August 2018

Anonymous user

@@ Line 103: / Line 103: @@
 ==== ObjectID ====
-After this are four tables of objects. Each object is identified with a 16-bit '''ObjectID''':
+After this are four tables of objects. Each object is identified with a 16-bit '''ObjectID'''.
-{| class="wikitable"
+Factor5 designed ObjectIDs to used in a polymorphic manner. The top 2 bits of the ID are used
-! Offset
+to differentiate between SoundMacros, Keymaps, and Layers. If the ID passes a mask of 0x4000,
-! Size
+the object is a ''Keymap''. If the ID passes a mask of 0x8000, the object is a ''Layer''.
-! Description
+Otherwise, the object is assumed to be a ''SoundMacro''. ''Tables'' don't require this type of
-|-
+polymorphism due to the context in which they are accessed.
-| 0x0
-| 1
-| '''Sound object type''' <ol start="0"><li>SoundMacro</li><li>Table</li><li value=4>Keymap</li><li value=8>Layer</li></ol>
-|-
-| 0x1
-| 1
-| '''Unique ID''' (per type namespacing)
-|-
-| 0x2
-| colspan=2 {{unknown|End of ObjectID}}
-|}
-'''Note:''' This is the ID structure produced by MusyX data export tool used for ''Metroid Prime''
-(which allocates all group ObjectIDs on export). The ObjectID structure is actually an arbitrary 16-bits in MusyX
-(limited to 14-bit uniqueness). Based on findings from other games, this upper-byte type source is not 100% reliable,
-since Factor5 updated the tool during the console's lifetime.
 ==== SoundMacros ====