Mo' Bends Blender Addon

This script is an addon for Blender. It exports animation data in a custom binary format. The exported files can then be used for making custom BendsPacks for the Minecraft Mo' Bends mod, or for any other animation related project.

Development

To run unit tests, use pytest:

# In the project root directory
$ pytest

Installation

To install this addon into Blender, just download the latest release .zip package, which should be this one.

In Blender, open up Preferences, and in the addons tab use the Install... action. There should be plenty of tutorials on how to install Blender addons out there, I'm sure you'll figure it out <3.

Format

All values are encoded in big endian.

(* basic building blocks *)
digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
hexdigit = digit | "A" | "B" | "C" | "D" | "E" | "F" ;

byte = hexdigit * 2 ;
nonzero byte = byte - "00" ;
int = byte * 4 ;
float = byte * 4 ;
string = { nonzero byte }, "\0" ;

(* properties *)
version = int ;
amount of bones = int ;
amount of frames = int ;
(*
    bit 1 determines if position is encoded
    bit 2 determines if rotation is encoded
    bit 3 determines if scale is encoded
*)
property flags = byte ;

position = float * 3 ;
rotation = float * 4 ;
scale = float * 3 ;
frame = property flags, [ position ], [ rotation ], [ scale ] ;
bone = string, { frame } ;

(* header *)
header = BENDSANIM

(* structure of the whole file *)
file = header,
       version,
       amount of bones,
       amount of frames,
       { bone } ;