SCHG:Sonic Adventure 2/Cutscenes

SCHG: Sonic Adventure 2
Dreamcast GameCube PC
Sonic Adventure 2 (Dreamcast) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes Sonic Adventure 2: Battle (Gamecube) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes Sonic Adventure 2 (PC) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats EXE Editing EXE Editing RAM Editing RAM Editing Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes

Cutscenes

Depending on the version of SA2, the data for the event cutscenes can differ. EXXX.PRS is the main file, while the _0 to _J files contain miscellaneous resources, such as audio timings and lighting/screen fade information. In the Dreamcast version, the models and animation data for a scene are all contained within the main file, while in SA2B, the animation data was split off into an uncompressed file labeled exxxmotion.bin. With two exceptions in the DC version - those being E0203 and E0210 - the event files can only be interpreted by the game if the main file is compressed.

Main File Information

Offset	Type	Description
0	Pointer	Scene geometry
4	Pointer	Texture list
8		Scene count
C	Pointer	Texture sizes
10	Pointer	Unknown
14	Pointer	Unknown
18	Pointer	Unknown
1C	Pointer	Tails' tails
20	Pointer	Upgrade list
24	Pointer	Models that use animated textures
28		Drop shadow control? A value of 1 indicates updated scene geometry to accommodate proper drop shadows. (SA2B only)

The upgrade list is constant throughout the game. To work around a technical limitation with the character models in SA2B, Mech Tails and Mech Eggman were given an upgrade slot each for their windshields, as they would have problems rendering otherwise.

Number	Description
1	Sonic's Light Shoes
2	Sonic's Flame Ring
3	Sonic's Bounce Bracelet
4	Sonic's Magic Gloves
5	Shadow's Air Shoes
6	Shadow's Flame Ring
7	Knuckles' Shovel Claw (Left)
8	Knuckles' Shovel Claw (Right)
9	Knuckles' Hammer Glove (Left)
10	Knuckles' Hammer Glove (Right)
11	Knuckles' Sunglasses
12	Knuckles' Air Necklace
13	Rouge's Pick Nails
14	Rouge's Treasure Scope
15	Rouge's Iron Boots
16	Rouge's Heart Plates
17	Mech Tails' cockpit window (SA2B only)
18	Mech Eggman's cockpit window (SA2B only)

EXXXX_0 Information

Starting at 0x26800 are 68-byte chunks that dictate the lighting information for the corresponding cutscene. The last 20 bytes can be considered a buffer for now.

Offset	Type	Description
0		Frame in which the lighting information takes effect
4		Fade control. 1 is a hard cut, while 2 is a fade-in from the previous set of instructions
8	Float	Light Direction Vector (X-Component)
C	Float	Light Direction Vector (Y-Component)
10	Float	Light Direction Vector (Z-Component)
14	Float	Red
18	Float	Green
1C	Float	Blue
20	Float	Light intensity
24	Float	Ambient R
28	Float	Ambient G
2C	Float	Ambient B

In-Level Scenes

Scenes that are labeled as MEXXXX.PRS in the event files are cutscenes that occur within a game state, such as before certain boss fights like Big Foot and Flying Dog. The contents of these files are not as robust as those of the main cutscenes, often only containing animation and shape motion data for the designated characters. As these scenes rely on the player models, specific parts of their body are omitted and replaced with cutscene-specific variants for the duration of the scene, with the exception of Mech Eggman as he only requires animation data. The contents of these files can be broken down as follows:

Offset	Type	Description
0		An indicator of the characters in the scene. Can be 01 (Sonic), 02 (Shadow), 03 (Sonic and Shadow), 10 (Knuckles), 20 (Rouge), 30 (Knuckles and Rouge), 80 (Mech Eggman)
4	Pointer	Camera information
8	Pointer	Sonic's pointer array (if applicable)
C	Pointer	Shadow's pointer array (if applicable)
18	Pointer	Knuckles' pointer array (if applicable)
1C	Pointer	Rouge's pointer array (if applicable)
24	Pointer	Mech Eggman's pointer array (if applicable)

The order for each character's pointer array always begins with the player model's animations, followed by the model -> animation -> shape motion data sets for each cutscene model. The head's data goes first, followed by the mouth, then the left hand, and finally the right hand.