# blender modules
import mathutils


MATRIX_BONE = mathutils.Matrix((
    (1.0, 0.0, 0.0, 0.0),
    (0.0, 0.0, -1.0, 0.0),
    (0.0, 1.0, 0.0, 0.0),
    (0.0, 0.0, 0.0, 1.0)
)).freeze()
MATRIX_BONE_INVERTED = MATRIX_BONE.inverted().freeze()

FORMAT_VERSION_6 = 6
FORMAT_VERSION_7 = 7
CURVE_COUNT = 6    # translation xyz, rotation xyz
