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--- banjo_tooie:geometry_layouts [2020/04/22 17:42]
pfedak [Geometry Layouts]
+++ banjo_tooie:geometry_layouts [2020/04/22 19:09] (current)
pfedak [Geometry Layouts]
@@ Line 1: / Line 1: @@
 ====== Geometry Layouts ======
-These scripts load display lists within the [[banjo_tooie:model_data|model file]], with certain aspects, properties, and checks applied. They are found at the end of a model file. Commands 0x00 through 0x10 are identical to those in [[banjo_kazooie:geometry_layouts|Banjo-Kazooie]], so we list only new commands. Note that level and skybox models can only use the old commands, and will not respect bone indices.
+These scripts load display lists within the [[banjo_tooie:model_data|model file]], with certain aspects, properties,
+and checks applied. They are found at the end of a model file. Commands 0x00 through 0x10 are identical to those in
+[[banjo_kazooie:geometry_layouts|Banjo-Kazooie]], so we list only new commands. Note that level and skybox models can
+only use the old commands, and will not respect bone indices.
-==== 0x02: BONE ====
+Almost all of the new commands involve enabling software lighting effects on some vertices. The lighting uses the model file's
+list of vertex normals, allowing lighting to be combined with vertex colors. Other than environment mapping (setting texture
+coordinates to simulate a reflective surface), effects aren't determined by the commands, and must be enabled by the object
+logic or other game conditions.
+==== 0x11: LOAD DL (LIGHTING) ====
-Loads a display list from the DL segment and attaches it to the current group of bones with ID.
+Loads a display list from an offset into the F3DEX segment (see [[banjo_kazooie:geometry_layouts#x03load_dl|command 0x03]]) and then enables software lighting on a range of vertices.
 Usage:
 ^ Value/Syntax ^ Description ^
-| [00 00 00 02] | Bone Command ID |
+| [00 00 00 11] | Load DL Command ID |
-| [00 00 <color darkred>aa aa</color>] | Load DL - DL Segment Address/8 (Example: 0x1C = 0xE0)|
+| [00 00 00 <color red>aa</color>] | Continue* |
-| [<color darkgreen>bb</color> <color darkblue>cc</color> <color purple>dd dd</color>] | <color darkgreen>bb</color>=Continue*, <color darkblue>cc</color>=Bone ID, <color purple>dddd</color>=?? |
+| [<color green>bb bb</color> <color blue>cc cc</color>] | <color green>bbbb</color>=Offset in DL Segment/0x08, <color blue>cccc</color>=First Triangle Index |
-| [00 00 00 00] | If <color darkgreen>bb</color>=10, these four bytes are written before the next command. |
+| [<color purple>dd dd</color> 00 <color orange>ee</color>] | <color purple>dddd</color>=Triangle Count, <color orange>ee</color>=Enable env mapping |
-*Continue: If 00, GeoLayout stops after command. If 0x10, GeoLayout continues.
 ----
-==== 0x03: LOAD DL ====
+==== 0x12: SKINNING (LIGHTING) ====
-Loads a display list from offset of F3DEX2 segment
+Loads display lists that draw triangles across bones (see [[banjo_kazooie:geometry_layouts#x05skinning|command 0x05]]) and enables lighting on a list of vertices. The lists of vertex counts are in parallel to the DL index list, and refer to sequential ranges following the first vertex index. They are accessed in order alternating child-parent-child-parent-...
-Usage:
 ^ Value/Syntax ^ Description ^
-| [00 00 00 03] | Load DL Command ID |
+| [00 00 00 12] | Command ID |
-| [00 00 00 <color darkred>aa</color>] | 00 to end GeoLayout after command, 0x10 to continue |
+| [00 00 00 <color red>aa</color>] | Continue* |
-| [<color darkgreen>bb bb</color> <color darkblue>cc cc</color>] | <color darkgreen>bbbb</color>=Offset in DL Segment/0x08, <color darkblue>cccc</color>=Tri Count |
+| [<color green>bb bb</color> <color blue>cc cc</color>] | <color green>bbbb</color>=offset in DL segment/0x08 for parent bone vertices|
-| [00 00 00 00] | If <color darkred>aa</color>=10, these four bytes are written before the next command. |
+| [<color purple>dd dd</color> <color orange>ee ee</color>] | <color blue>cccc</color>,<color purple>dddd</color>,<color orange>eeee</color>... zero-terminated list of DL offsets for current bone |
-*Continue: If 00, GeoLayout stops after command. If 0x10, GeoLayout continues.
+| ... | |
-''Example: 00 00 00 03 00 00 00 00 00 2D 00 10''
+| 0x14:[<color green>ff ff</color> <color blue>gg gg</color>] | <color green>ffff</color>,<color blue>gggg</color>,...=vertex counts for lighting, using parent bone (possibly zero) |
+| ... | |
-Addr= 0x2D*0x08 offset from F3DEX2 Segment Start, 0x168
+| 0x20:[<color green>hh hh</color> <color blue>ii ii</color>] | <color green>hhhh</color>,<color blue>iiii</color>,...=vertex counts for lighting, using child bone (possibly zero)|
-x10= 16 triangles in DL
+| ... | |
+| 0x2c:[<color palegreen>jj jj</color> 00 <color sienna>kk</color>] | <color palegreen>jjjj</color>=index of first vertex, <color sienna>kk</color>=Enable env mapping|
 ----
-==== 0x05: BONE ====
+==== 0x15: ENABLE LIGHTING ====
-Usage currently unknown.
+Enable lighting on lists of vertices on arbitrary bones. The ranges are consecutive, starting from the first index.
+^ Value/Syntax ^ Description ^
+| [00 00 00 15] | Command ID |
+| [00 00 00 <color red>aa</color>] | Continue* |
+| [<color green>bb bb</color> <color blue>cc cc</color>] | <color green>bbbb</color>=Range Count, <color blue>cccc</color>=Start Vertex|
+| [<color purple>dd dd</color> <color orange>ee ee</color>] |for each range: <color purple>dddd</color>=Bone Index, <color orange>eeee</color>=Vertex Count |
+| ... | |
 ----
-==== 0x08: ?????? ====
+==== 0x16: SKINNING ====
-Usage currently unknown.
+Seems equivalent to [[banjo_kazooie:geometry_layouts#x05skinning|command 0x05]], though through a different function.
 ----
-==== 0x0A: ?????? ====
+==== 0x17: SPLIT LIGHTING ====
-Usage currently unknown.
+Enable lighting on a list of vertices split across the current and parent bone.
-----
-==== 0x0D: DRAW DISTANCE ====
-Applies draw distance to descending geometry
-Usage:
 ^ Value/Syntax ^ Description ^
-| [00 00 00 0D] | Command |
+| [00 00 00 17] | Command ID |
-| [00 00 00 <color darkred>aa</color>] | 00 for final instance, 28 otherwise |
+| [00 00 00 <color red>aa</color>] | Continue* |
-| [<color darkred>XX XX</color> <color darkgreen>YY YY</color> <color darkblue>ZZ ZZ</color>] | Draw distance: Negative Coords|
+| [<color green>bb bb</color> <color blue>cc cc</color>] | <color green>bbbb</color>=Start Vertex, <color blue>cccc</color>=Child Vertex Count|
-| [<color darkred>XX XX</color> <color darkgreen>YY YY</color> <color darkblue>ZZ ZZ</color>] | Draw distance: Positive Coords |
+| [<color purple>dd dd</color> 00 <color orange>ee</color>] |<color purple>dddd</color>=Parent Vertex Count, <color orange>ee</color>=Enable env mapping |
-| [<color darkred>bb bb</color> <color darkgreen>cc cc</color>] | <color darkred>bbbb</color>= ?? Usually 0018, <color darkgreen>cccc</color>= ????? |
 ----
+==== 0x18: SKINNING (LIGHTING) ====
-==== 0x11: LOAD DL ====
+Equivalent to [[banjo_tooie:geometry_layouts#x12skinning_lighting|command 0x12]].
-Usage currently unknown.
-----
-==== 0x18: LOAD DL ====
-Usage currently unknown.
 ----
+*The "continue" value is the offset to the next sibling geo layout command. A zero means there is no next sibling,
+so processing goes up to the parent level or ends if this is the top level.

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