Sonic Adventure

SCHG: Sonic Adventure
Dreamcast Gamecube 2004 PC 2010 PC
Sonic Adventure (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 Model Editing Format Models Animations Locations Models Levels Level Data Formats Save Files Main Save Chao Save Misc Level List Character Animation Lists Textures Sonic Adventure DX (Gamecube) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Missions Programs Sound Editing Sound Editing Music List Voices Sound Effects Save Files Main Save Chao Save Misc Level List Character Animation Lists Textures Sonic Adventure DX (PC) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Missions Programs Sound Editing Sound Editing Music List Voices Sound Effects EXE Editing EXE Editing Animation Swapping Action Swapping Physics Text Editing Misc. Code Function List Object List DLL Files CHRMODELS.DLL ADV00MODELS.DLL ADV01MODELS.DLL ADV01CMODELS.DLL ADV02MODELS.DLL ADV03MODELS.DLL CHAOSTGGARDEN02MR_DAYTIME.DLL CHAOSTGGARDEN02MR_EVENING.DLL CHAOSTGGARDEN02MR_NIGHT.DLL Model Editing Format Models Animations Locations Models Animations Levels Level Data Formats RAM Editing RAM Editing Global Variables Emblems Event Flags Character Object 1 Character Object 2 Character Object 3 Save Files Main Save Chao Save Misc Level List Character Actions Character Animation Lists Textures How-To Import Levels Sonic Adventure (2010) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Missions Programs Sound Editing Sound Editing Music List Voices Sound Effects Save Files Main Save Chao Save Misc Level List Character Actions Character Animation Lists Textures

This is the Sonic Community Hacking Guide for Sonic Adventure. Download the SA1 tools or SADXMDL if you plan to edit the models.

Models

Main Article: SCHG:Sonic Adventure/Model Format
All levels and boss characters in SA are compressed in .PRS files in SA's SONICADV directory. Inside these .PRS files are .BIN files, which are the models.

Model editing

originally by Dude Edited for use with SA1

Editing a model in SA is a lot simpler than you would think. The following instructions should be easy to understand.

Rip the Models. Use sadxmdl.exe to rip a .BIN model.

Import the Models. Open the .OBJ file sadxmdl.exe created and import it into your favorite 3D modeling application. (Note you cannot use Milkshape3D for this.)

Sort the Models. Next, you need to search through all the objects you imported until you find what you want to edit.

Edit the Models. Now that you have the model you wish to edit, start editing vertex positions. Do not do mesh edits as they will not work in the game.

Export the Models. Export your creation to an .OBJ file, and run it through obj2vt.exe.

Replace the Models. Open the exported out.vt in a hex editor. Open the .BIN file in a hex editor. Go back into your modeling application, and look at the edited object's name. It should be something like "group36332_4". See the "36332"? That's the decimal offset in the .BIN you need to go to. Go there now. Now, you're at the SEG struct for the model. The attach pointer is 4 bytes after this, and it is a dword. Subtract $C900000 (the key for Dreamcast binaries), and you get your new offset. Now go to this new offset. You should now be at the ATTACH struct of the model. The first dword is a vertex pointer. You now have the next offset to go to. Go there. Now, in this case, out.vt is 2388 bytes. Go back to your location in the .BIN, select the next 2388 bytes, and replace those bytes with the contents of out.vt. Save, and look at your creation in the game.

Objects

Main Article: SCHG:Sonic Adventure/Object Editing