Custom Track Tutorial/Animations

Programs:

• btk-conv by Yoshi2 for BTK files
• bark-conv by Yoshi2 for BRK files
• BTPxT by MasterF0x for BTP files

While all the above steps are mandatory for a custom course to load, animations are not. Nevertheless, animations are an easy way to add movement and excitement to a stage.

Animation	Used for animating	Skybox Support	Other Notes
BTK	scaling, rotation, and translation of textures	Yes (named coursename_sky.btk)	Up to two (named coursename_course.btk and coursename_course_02.btk) can be added to any course slot
BRK	TEV color registers of a material	Yes (named coursename_sky.brk)	Require a specific material setup in the .bmd
BTP	texture swaps	Untested/No	If you plan on animating more than 2 materials using a .btp file google "j3d animation editor tarsa129"

BTK / BRK Specifics

• These files have keyframes, meaning that an animator only needs to specify values at specific, important frames.
• Every material animation in the same file will share the same duration and loop mode
• Tangent values define what the value will be in between the keyframes
  • For Bezier Interpolation, set the tangent at "0"
  • For linear interpolation, set the second tangent of the current keyframe and the first tangent of the next keyframe to be (next value - current value) / (next time - current time)

BTP Specifics

• In .btp files, every frame of an animation must have a defined value
• The values in a .btp file correspond to the order of the textures in the texheader .json file
  • Specifying "0" for a frame in the .btp file will cause the texture at the 0th index in the texheader file (the first one) to be loaded in for that frame.
• Each material animation, even in the same file, has its own duration. There is no loop mode for .btp files.

Other Necessary Files

Other File Formats

File Format	Description	Tool	Examples
.ght	Staff Ghost info / inputs	Dolphin Emulator or Nintendont - to create a ghost .gci file Any hex editor - for editing the .gci file gci2ght by tarsa129 - for .gci -> .ght conversion	Each file in Filesystem/StaffGhosts
.ast	Course background music	Any sound editor - for editing the sound AstConverter by Anthe - for converting to and from .ast Nintendo_AST_Creator by gheskett - for converting to .ast	Any file in Filesystem/AudioRes/Stream
.bti	Course thumbnail, logo, and name	Wiimm's SZS Tools by Wiimm - used for converting between various image formats	"cop_<course name>" in Filesystem/SceneData/English/courseselect.arc/timg (Thumbnail) Any file in Filesystem/CourseName/English (Grand Prix logo) Any file in Filesystem/SceneData/English/coursename.arc/timg (Records screen logo) "coname_<course name>" in Filesystem/SceneData/English/courseselect.arc/timg (Course name)