utils.py 文件源码

def transform_bone_matrix(bone):
    if not bone.parent:
        return Matrix()

    i1 = Vector((1.0, 0.0, 0.0))
    i2 = Vector((0.0, 1.0, 0.0))
    i3 = Vector((0.0, 0.0, 1.0))

    x_axis = bone.y_axis
    y_axis = bone.x_axis
    z_axis = -bone.z_axis

    row_x = Vector((x_axis * i1, x_axis * i2, x_axis * i3))
    row_y = Vector((y_axis * i1, y_axis * i2, y_axis * i3))
    row_z = Vector((z_axis * i1, z_axis * i2, z_axis * i3))

    trans_matrix = Matrix((row_x, row_y, row_z))

    location = trans_matrix * bone.matrix.translation
    bone_matrix = trans_matrix.to_4x4()
    bone_matrix.translation = -location

    return bone_matrix