OBD:IDXA AKEV 1: Difference between revisions

Revision as of 21:02, 16 September 2007

IDXA : Index Array

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Overview @ Oni Stuff

AKEV 1 AKEV 2 AKOT 1 AKOT 2 M3GM 1 M3GM 2 ONOA

Offset	Type	Raw Hex	Value	Description
0x00	res_id	01 53 02 00	595	00595-.IDXA
0x04	lev_id	01 00 00 00	3	level 3
0x08	char[20]	AD DE	dead	unused
0x1C	int32	91 01 00 00	401	array size
First element (black outline)
0x00	int32	15 50 00 00	20501	AGQG element ID (used for: AKEV 2 needs it)

@@ Line 19: / Line 19: @@
 {{OBDtr| 0x00 | int32   |FFC8C8| 15 50 00 00 | 20501      | AGQG element ID (used for: [[OBD:IDXA_AKEV_2|AKEV 2]] needs it)}}
 |}
-;IDXA usage
-*Two kinds of IDXA are used in [[OBD:AKEV|AKEV]]: they define quads affected by [[env_show]].
-*Two kinds of IDXA used in [[OBD:AKOT|AKOT]] define the quads and BNVs intersected by a leaf.
-*Two kinds of IDXA are used in [[OBD:M3GM|M3GM]]: triangle strips and face normal groups.
-*[[OBD:ONOA|ONOA]] uses several similar IDXA, one to store the quad IDs of every object.
-;High bit
-:The high bit is only used for triangle strips in [[OBD:M3GM|M3GM]].
-:It is set for the first vertex index of every triangle strip.
-;AKEV indices
-:Both IDXA have the same number of entries, equal to the number of togglable quads.
-:The first IDXA lists the quad IDs (index into AGQG, AGQC, AGQR and AGDB arrays).
-:The second IDXA assigns a gunk ID to every quad (one or more quads per gunk).
-;AKOT indices
-:The first IDXA lists the IDs of the quads intersected by octtree leaves, one leaf after another.
-:The leaf specifies how many quad IDs Oni should read from the IDXA and where it should start.
-:Same thing for the intersected BNVs: the leaf specifies the size and position of the BNV list.
 {{OBD_File_Footer | type=IDXA | prev=HPge | next=IGHH | name=Index Array| family=Generic}}