export_fbx.py

    # now we have collected all armatures, add bones
    for i, ob in enumerate(ob_arms):

        ob_arms[i] = my_arm = my_object_generic(ob)

        my_arm.fbxBones = []
        my_arm.blenData = ob.data
        if ob.animation_data:
            my_arm.blenAction = ob.animation_data.action
        else:
            my_arm.blenAction = None
# 		my_arm.blenAction =		ob.action
        my_arm.blenActionList = []

        # fbxName, blenderObject, my_bones, blenderActions
        #ob_arms[i] = fbxArmObName, ob, arm_my_bones, (ob.action, [])

        for bone in my_arm.blenData.bones:
            my_bone = my_bone_class(bone, my_arm)
            my_arm.fbxBones.append(my_bone)
            ob_bones.append(my_bone)

    # add the meshes to the bones and replace the meshes armature with own armature class
    #for obname, ob, mtx, me, mats, arm, armname in ob_meshes:
    for my_mesh in ob_meshes:
        # Replace
        # ...this could be sped up with dictionary mapping but its unlikely for
        # it ever to be a bottleneck - (would need 100+ meshes using armatures)
        if my_mesh.fbxArm:
            for my_arm in ob_arms:
                if my_arm.blenObject == my_mesh.fbxArm:
                    my_mesh.fbxArm = my_arm
                    break

        for my_bone in ob_bones:

            # The mesh uses this bones armature!
            if my_bone.fbxArm == my_mesh.fbxArm:
                if my_bone.blenBone.use_deform:
                    my_bone.blenMeshes[my_mesh.fbxName] = me

                # parent bone: replace bone names with our class instances
                # my_mesh.fbxBoneParent is None or a blender bone name initialy, replacing if the names match.
                if my_mesh.fbxBoneParent == my_bone.blenName:
                    my_mesh.fbxBoneParent = my_bone

    bone_deformer_count = 0  # count how many bones deform a mesh
    my_bone_blenParent = None
    for my_bone in ob_bones:
        my_bone_blenParent = my_bone.blenBone.parent
        if my_bone_blenParent:
            for my_bone_parent in ob_bones:
                # Note 2.45rc2 you can compare bones normally
                if my_bone_blenParent.name == my_bone_parent.blenName and my_bone.fbxArm == my_bone_parent.fbxArm:
                    my_bone.parent = my_bone_parent
                    break

        # Not used at the moment
        # my_bone.calcRestMatrixLocal()
        bone_deformer_count += len(my_bone.blenMeshes)

    del my_bone_blenParent

    # Build blenObject -> fbxObject mapping
    # this is needed for groups as well as fbxParenting
    bpy.data.objects.tag(False)

    # using a list of object names for tagging (Arystan)

    tmp_obmapping = {}
    for ob_generic in ob_all_typegroups:
        for ob_base in ob_generic:
            ob_base.blenObject.tag = True
            tmp_obmapping[ob_base.blenObject] = ob_base

    # Build Groups from objects we export
    for blenGroup in bpy.data.groups:
        fbxGroupName = None
        for ob in blenGroup.objects:
            if ob.tag:
                if fbxGroupName is None:
                    fbxGroupName = sane_groupname(blenGroup)
                    groups.append((fbxGroupName, blenGroup))

                tmp_obmapping[ob].fbxGroupNames.append(fbxGroupName)  # also adds to the objects fbxGroupNames

    groups.sort()  # not really needed

    # Assign parents using this mapping
    for ob_generic in ob_all_typegroups:
        for my_ob in ob_generic:
            parent = my_ob.blenObject.parent
            if parent and parent.tag:  # does it exist and is it in the mapping
                my_ob.fbxParent = tmp_obmapping[parent]

    del tmp_obmapping
    # Finished finding groups we use

    materials = [(sane_matname(mat_tex_pair), mat_tex_pair) for mat_tex_pair in materials.keys()]
    textures = [(sane_texname(tex), tex) for tex in textures.keys()  if tex]
    materials.sort(key=lambda m: m[0])  # sort by name
    textures.sort(key=lambda m: m[0])

    camera_count = 8
    file.write('''

; Object definitions
;------------------------------------------------------------------

Definitions:  {
    Version: 100
    Count: %i''' % (\
        1 + 1 + camera_count + \
        len(ob_meshes) + \
        len(ob_lights) + \
        len(ob_cameras) + \
        len(ob_arms) + \
        len(ob_null) + \
        len(ob_bones) + \
        bone_deformer_count + \
        len(materials) + \
        (len(textures) * 2)))  # add 1 for the root model 1 for global settings

    del bone_deformer_count

    file.write('''
    ObjectType: "Model" {
        Count: %i
    }''' % (\
        1 + camera_count + \
        len(ob_meshes) + \
        len(ob_lights) + \
        len(ob_cameras) + \
        len(ob_arms) + \
        len(ob_null) + \
        len(ob_bones)))  # add 1 for the root model

    file.write('''
    ObjectType: "Geometry" {
        Count: %i
    }''' % len(ob_meshes))

    if materials:
        file.write('''
    ObjectType: "Material" {
        Count: %i
    }''' % len(materials))

    if textures:
        file.write('''
    ObjectType: "Texture" {
        Count: %i
    }''' % len(textures))  # add 1 for an empty tex
        file.write('''
    ObjectType: "Video" {
        Count: %i
    }''' % len(textures))  # add 1 for an empty tex

    tmp = 0
    # Add deformer nodes
    for my_mesh in ob_meshes:
        if my_mesh.fbxArm:
            tmp += 1

    # Add subdeformers
    for my_bone in ob_bones:
        tmp += len(my_bone.blenMeshes)

    if tmp:
        file.write('''
    ObjectType: "Deformer" {
        Count: %i
    }''' % tmp)
    del tmp

    # we could avoid writing this possibly but for now just write it

    file.write('''
    ObjectType: "Pose" {
        Count: 1
    }''')

    if groups:
        file.write('''
    ObjectType: "GroupSelection" {
        Count: %i
    }''' % len(groups))

    file.write('''
    ObjectType: "GlobalSettings" {
        Count: 1
    }
}''')

    file.write('''

; Object properties
;------------------------------------------------------------------

Objects:  {''')

    # To comply with other FBX FILES
    write_camera_switch()

    # Write the null object
    write_null(None, 'blend_root')  # , GLOBAL_MATRIX)

    for my_null in ob_null:
        write_null(my_null)

    for my_arm in ob_arms:
        write_null(my_arm)

    for my_cam in ob_cameras:
        write_camera(my_cam)

    for my_light in ob_lights:
        write_light(my_light)

    for my_mesh in ob_meshes:
        write_mesh(my_mesh)

    #for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        write_bone(my_bone)

    write_camera_default()

    for matname, (mat, tex) in materials:
        write_material(matname, mat)  # We only need to have a material per image pair, but no need to write any image info into the material (dumb fbx standard)

    # each texture uses a video, odd
    for texname, tex in textures:
        write_video(texname, tex)
    i = 0
    for texname, tex in textures:
        write_texture(texname, tex, i)
        i += 1

    for groupname, group in groups:
        write_group(groupname)

    # NOTE - c4d and motionbuilder dont need normalized weights, but deep-exploration 5 does and (max?) do.

    # Write armature modifiers
    # TODO - add another MODEL? - because of this skin definition.
    for my_mesh in ob_meshes:
        if my_mesh.fbxArm:
            write_deformer_skin(my_mesh.fbxName)

            # Get normalized weights for temorary use
            if my_mesh.fbxBoneParent:
                weights = None
            else:
                weights = meshNormalizedWeights(my_mesh.blenObject, my_mesh.blenData)

            #for bonename, bone, obname, bone_mesh, armob in ob_bones:
            for my_bone in ob_bones:
                if me in iter(my_bone.blenMeshes.values()):
                    write_sub_deformer_skin(my_mesh, my_bone, weights)

    # Write pose's really weired, only needed when an armature and mesh are used together
    # each by themselves dont need pose data. for now only pose meshes and bones

    file.write('''
    Pose: "Pose::BIND_POSES", "BindPose" {
        Type: "BindPose"
        Version: 100
        Properties60:  {
        }
        NbPoseNodes: ''')
    file.write(str(len(pose_items)))

    for fbxName, matrix in pose_items:
        file.write('\n\t\tPoseNode:  {')
        file.write('\n\t\t\tNode: "Model::%s"' % fbxName)
        file.write('\n\t\t\tMatrix: %s' % mat4x4str(matrix if matrix else Matrix()))
        file.write('\n\t\t}')

    file.write('\n\t}')

    # Finish Writing Objects
    # Write global settings
    file.write('''
    GlobalSettings:  {
        Version: 1000
        Properties60:  {
            Property: "UpAxis", "int", "",1
            Property: "UpAxisSign", "int", "",1
            Property: "FrontAxis", "int", "",2
            Property: "FrontAxisSign", "int", "",1
            Property: "CoordAxis", "int", "",0
            Property: "CoordAxisSign", "int", "",1
            Property: "UnitScaleFactor", "double", "",100
        }
    }
''')
    file.write('}')

    file.write('''

; Object relations
;------------------------------------------------------------------

Relations:  {''')

    file.write('\n\tModel: "Model::blend_root", "Null" {\n\t}')

    for my_null in ob_null:
        file.write('\n\tModel: "Model::%s", "Null" {\n\t}' % my_null.fbxName)

    for my_arm in ob_arms:
        file.write('\n\tModel: "Model::%s", "Null" {\n\t}' % my_arm.fbxName)

    for my_mesh in ob_meshes:
        file.write('\n\tModel: "Model::%s", "Mesh" {\n\t}' % my_mesh.fbxName)

    # TODO - limbs can have the same name for multiple armatures, should prefix.
    #for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        file.write('\n\tModel: "Model::%s", "Limb" {\n\t}' % my_bone.fbxName)

    for my_cam in ob_cameras:
        file.write('\n\tModel: "Model::%s", "Camera" {\n\t}' % my_cam.fbxName)

    for my_light in ob_lights:
        file.write('\n\tModel: "Model::%s", "Light" {\n\t}' % my_light.fbxName)

    file.write('''
    Model: "Model::Producer Perspective", "Camera" {
    }
    Model: "Model::Producer Top", "Camera" {
    }
    Model: "Model::Producer Bottom", "Camera" {
    }
    Model: "Model::Producer Front", "Camera" {
    }
    Model: "Model::Producer Back", "Camera" {
    }
    Model: "Model::Producer Right", "Camera" {
    }
    Model: "Model::Producer Left", "Camera" {
    }
    Model: "Model::Camera Switcher", "CameraSwitcher" {
    }''')

    for matname, (mat, tex) in materials:
        file.write('\n\tMaterial: "Material::%s", "" {\n\t}' % matname)

    if textures:
        for texname, tex in textures:
            file.write('\n\tTexture: "Texture::%s", "TextureVideoClip" {\n\t}' % texname)
        for texname, tex in textures:
            file.write('\n\tVideo: "Video::%s", "Clip" {\n\t}' % texname)

    # deformers - modifiers
    for my_mesh in ob_meshes:
        if my_mesh.fbxArm:
            file.write('\n\tDeformer: "Deformer::Skin %s", "Skin" {\n\t}' % my_mesh.fbxName)

    #for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        for fbxMeshObName in my_bone.blenMeshes:  # .keys() - fbxMeshObName
            # is this bone effecting a mesh?
            file.write('\n\tDeformer: "SubDeformer::Cluster %s %s", "Cluster" {\n\t}' % (fbxMeshObName, my_bone.fbxName))

    # This should be at the end
    # file.write('\n\tPose: "Pose::BIND_POSES", "BindPose" {\n\t}')

    for groupname, group in groups:
        file.write('\n\tGroupSelection: "GroupSelection::%s", "Default" {\n\t}' % groupname)

    file.write('\n}')
    file.write('''

; Object connections
;------------------------------------------------------------------

Connections:  {''')

    # NOTE - The FBX SDK dosnt care about the order but some importers DO!
    # for instance, defining the material->mesh connection
    # before the mesh->blend_root crashes cinema4d

    # write the fake root node
    file.write('\n\tConnect: "OO", "Model::blend_root", "Model::Scene"')

    for ob_generic in ob_all_typegroups:  # all blender 'Object's we support
        for my_ob in ob_generic:
            if my_ob.fbxParent:
                file.write('\n\tConnect: "OO", "Model::%s", "Model::%s"' % (my_ob.fbxName, my_ob.fbxParent.fbxName))
            else:
                file.write('\n\tConnect: "OO", "Model::%s", "Model::blend_root"' % my_ob.fbxName)

    if materials:
        for my_mesh in ob_meshes:
            # Connect all materials to all objects, not good form but ok for now.
            for mat, tex in my_mesh.blenMaterials:
                mat_name = mat.name if mat else None
                tex_name = tex.name if tex else None

                file.write('\n\tConnect: "OO", "Material::%s", "Model::%s"' % (sane_name_mapping_mat[mat_name, tex_name], my_mesh.fbxName))

    if textures:
        for my_mesh in ob_meshes:
            if my_mesh.blenTextures:
                # file.write('\n\tConnect: "OO", "Texture::_empty_", "Model::%s"' % my_mesh.fbxName)
                for tex in my_mesh.blenTextures:
                    if tex:
                        file.write('\n\tConnect: "OO", "Texture::%s", "Model::%s"' % (sane_name_mapping_tex[tex.name], my_mesh.fbxName))

        for texname, tex in textures:
            file.write('\n\tConnect: "OO", "Video::%s", "Texture::%s"' % (texname, texname))

    for my_mesh in ob_meshes:
        if my_mesh.fbxArm:
            file.write('\n\tConnect: "OO", "Deformer::Skin %s", "Model::%s"' % (my_mesh.fbxName, my_mesh.fbxName))

    #for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        for fbxMeshObName in my_bone.blenMeshes:  # .keys()
            file.write('\n\tConnect: "OO", "SubDeformer::Cluster %s %s", "Deformer::Skin %s"' % (fbxMeshObName, my_bone.fbxName, fbxMeshObName))

    # limbs -> deformers
    # for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        for fbxMeshObName in my_bone.blenMeshes:  # .keys()
            file.write('\n\tConnect: "OO", "Model::%s", "SubDeformer::Cluster %s %s"' % (my_bone.fbxName, fbxMeshObName, my_bone.fbxName))

    #for bonename, bone, obname, me, armob in ob_bones:
    for my_bone in ob_bones:
        # Always parent to armature now
        if my_bone.parent:
            file.write('\n\tConnect: "OO", "Model::%s", "Model::%s"' % (my_bone.fbxName, my_bone.parent.fbxName))
        else:
            # the armature object is written as an empty and all root level bones connect to it
            file.write('\n\tConnect: "OO", "Model::%s", "Model::%s"' % (my_bone.fbxName, my_bone.fbxArm.fbxName))

    # groups
    if groups:
        for ob_generic in ob_all_typegroups:
            for ob_base in ob_generic:
                for fbxGroupName in ob_base.fbxGroupNames:
                    file.write('\n\tConnect: "OO", "Model::%s", "GroupSelection::%s"' % (ob_base.fbxName, fbxGroupName))

    for my_arm in ob_arms:
        file.write('\n\tConnect: "OO", "Model::%s", "Model::blend_root"' % my_arm.fbxName)

    file.write('\n}')

    # Needed for scene footer as well as animation
    render = scene.render

    # from the FBX sdk
    #define KTIME_ONE_SECOND        KTime (K_LONGLONG(46186158000))
    def fbx_time(t):
        # 0.5 + val is the same as rounding.
        return int(0.5 + ((t / fps) * 46186158000))

    fps = float(render.fps)
    start = scene.frame_start
    end = scene.frame_end
    if end < start:
        start, end = end, st

    # comment the following line, otherwise we dont get the pose
    # if start==end: ANIM_ENABLE = False

    # animations for these object types
    ob_anim_lists = ob_bones, ob_meshes, ob_null, ob_cameras, ob_lights, ob_arms

    if ANIM_ENABLE and [tmp for tmp in ob_anim_lists if tmp]:

        frame_orig = scene.frame_current

        if ANIM_OPTIMIZE:
            ANIM_OPTIMIZE_PRECISSION_FLOAT = 0.1 ** ANIM_OPTIMIZE_PRECISSION

        # default action, when no actions are avaioable
        tmp_actions = []
        blenActionDefault = None
        action_lastcompat = None

        # instead of tagging
        tagged_actions = []

        if ANIM_ACTION_ALL:
# 			bpy.data.actions.tag = False
            tmp_actions = bpy.data.actions[:]

            # find which actions are compatible with the armatures
            # blenActions is not yet initialized so do it now.
            tmp_act_count = 0
            for my_arm in ob_arms:

                # get the default name
                if not blenActionDefault:
                    blenActionDefault = my_arm.blenAction

                arm_bone_names = set([my_bone.blenName for my_bone in my_arm.fbxBones])

                for action in tmp_actions:

                    action_chan_names = arm_bone_names.intersection(set([g.name for g in action.groups]))
# 					action_chan_names = arm_bone_names.intersection( set(action.getChannelNames()) )

                    if action_chan_names:  # at least one channel matches.
                        my_arm.blenActionList.append(action)
                        tagged_actions.append(action.name)
# 						action.tag = True
                        tmp_act_count += 1

                        # incase there is no actions applied to armatures
                        action_lastcompat = action

            if tmp_act_count:
                # unlikely to ever happen but if no actions applied to armatures, just use the last compatible armature.
                if not blenActionDefault:
                    blenActionDefault = action_lastcompat

        del action_lastcompat

        tmp_actions.insert(0, None)  # None is the default action

        file.write('''
;Takes and animation section
;----------------------------------------------------

Takes:  {''')

        if blenActionDefault:
            file.write('\n\tCurrent: "%s"' % sane_takename(blenActionDefault))
        else:
            file.write('\n\tCurrent: "Default Take"')

        for blenAction in tmp_actions:
            # we have tagged all actious that are used be selected armatures
            if blenAction:
                if blenAction.name in tagged_actions:
# 				if blenAction.tag:
                    print('\taction: "%s" exporting...' % blenAction.name)
                else:
                    print('\taction: "%s" has no armature using it, skipping' % blenAction.name)
                    continue

            if blenAction is None:
                # Warning, this only accounts for tmp_actions being [None]
                file.write('\n\tTake: "Default Take" {')
                act_start = start
                act_end = end
            else:
                # use existing name
                if blenAction == blenActionDefault:  # have we already got the name
                    file.write('\n\tTake: "%s" {' % sane_name_mapping_take[blenAction.name])
                else:
                    file.write('\n\tTake: "%s" {' % sane_takename(blenAction))

                act_start, act_end = blenAction.frame_range
                act_start = int(act_start)
                act_end = int(act_end)

                # Set the action active
                for my_arm in ob_arms:
                    if my_arm.blenObject.animation_data and blenAction in my_arm.blenActionList:
                        my_arm.blenObject.animation_data.action = blenAction
                        # print('\t\tSetting Action!', blenAction)
                # scene.update(1)

            file.write('\n\t\tFileName: "Default_Take.tak"')  # ??? - not sure why this is needed
            file.write('\n\t\tLocalTime: %i,%i' % (fbx_time(act_start - 1), fbx_time(act_end - 1)))  # ??? - not sure why this is needed
            file.write('\n\t\tReferenceTime: %i,%i' % (fbx_time(act_start - 1), fbx_time(act_end - 1)))  # ??? - not sure why this is needed

            file.write('''

        ;Models animation
        ;----------------------------------------------------''')

            # set pose data for all bones
            # do this here incase the action changes
            '''
            for my_bone in ob_bones:
                my_bone.flushAnimData()
            '''
            i = act_start
            while i <= act_end:
                scene.frame_set(i)
                for ob_generic in ob_anim_lists:
                    for my_ob in ob_generic:
                        #Blender.Window.RedrawAll()
                        if ob_generic == ob_meshes and my_ob.fbxArm:
                            # We cant animate armature meshes!
                            my_ob.setPoseFrame(i, fake=True)
                        else:
                            my_ob.setPoseFrame(i)

                i += 1

            #for bonename, bone, obname, me, armob in ob_bones:
            for ob_generic in (ob_bones, ob_meshes, ob_null, ob_cameras, ob_lights, ob_arms):

                for my_ob in ob_generic:

                    if ob_generic == ob_meshes and my_ob.fbxArm:
                        # do nothing,
                        pass
                    else:

                        file.write('\n\t\tModel: "Model::%s" {' % my_ob.fbxName)  # ??? - not sure why this is needed
                        file.write('\n\t\t\tVersion: 1.1')
                        file.write('\n\t\t\tChannel: "Transform" {')

                        context_bone_anim_mats = [(my_ob.getAnimParRelMatrix(frame), my_ob.getAnimParRelMatrixRot(frame)) for frame in range(act_start, act_end + 1)]

                        # ----------------
                        # ----------------
                        for TX_LAYER, TX_CHAN in enumerate('TRS'):  # transform, rotate, scale

                            if TX_CHAN == 'T':
                                context_bone_anim_vecs = [mtx[0].to_translation() for mtx in context_bone_anim_mats]
                            elif	TX_CHAN == 'S':
                                context_bone_anim_vecs = [mtx[0].to_scale() for mtx in context_bone_anim_mats]
                            elif	TX_CHAN == 'R':
                                # Was....
                                # elif 	TX_CHAN=='R':	context_bone_anim_vecs = [mtx[1].to_euler()			for mtx in context_bone_anim_mats]
                                #
                                # ...but we need to use the previous euler for compatible conversion.
                                context_bone_anim_vecs = []
                                prev_eul = None
                                for mtx in context_bone_anim_mats:
                                    if prev_eul:
                                        prev_eul = mtx[1].to_euler('XYZ', prev_eul)
                                    else:
                                        prev_eul = mtx[1].to_euler()
                                    context_bone_anim_vecs.append(tuple_rad_to_deg(prev_eul))

                            file.write('\n\t\t\t\tChannel: "%s" {' % TX_CHAN)  # translation

                            for i in range(3):
                                # Loop on each axis of the bone
                                file.write('\n\t\t\t\t\tChannel: "%s" {' % ('XYZ'[i]))  # translation
                                file.write('\n\t\t\t\t\t\tDefault: %.15f' % context_bone_anim_vecs[0][i])
                                file.write('\n\t\t\t\t\t\tKeyVer: 4005')

                                if not ANIM_OPTIMIZE:
                                    # Just write all frames, simple but in-eficient
                                    file.write('\n\t\t\t\t\t\tKeyCount: %i' % (1 + act_end - act_start))
                                    file.write('\n\t\t\t\t\t\tKey: ')
                                    frame = act_start
                                    while frame <= act_end:
                                        if frame != act_start:
                                            file.write(',')

                                        # Curve types are 'C,n' for constant, 'L' for linear
                                        # C,n is for bezier? - linear is best for now so we can do simple keyframe removal
                                        file.write('\n\t\t\t\t\t\t\t%i,%.15f,L' % (fbx_time(frame - 1), context_bone_anim_vecs[frame - act_start][i]))
                                        frame += 1
                                else:
                                    # remove unneeded keys, j is the frame, needed when some frames are removed.
                                    context_bone_anim_keys = [(vec[i], j) for j, vec in enumerate(context_bone_anim_vecs)]

                                    # last frame to fisrt frame, missing 1 frame on either side.
                                    # removeing in a backwards loop is faster
                                    #for j in xrange( (act_end-act_start)-1, 0, -1 ):
                                    # j = (act_end-act_start)-1
                                    j = len(context_bone_anim_keys) - 2
                                    while j > 0 and len(context_bone_anim_keys) > 2:
                                        # print j, len(context_bone_anim_keys)
                                        # Is this key the same as the ones next to it?

                                        # co-linear horizontal...
                                        if		abs(context_bone_anim_keys[j][0] - context_bone_anim_keys[j - 1][0]) < ANIM_OPTIMIZE_PRECISSION_FLOAT and \
                                                abs(context_bone_anim_keys[j][0] - context_bone_anim_keys[j + 1][0]) < ANIM_OPTIMIZE_PRECISSION_FLOAT:

                                            del context_bone_anim_keys[j]

                                        else:
                                            frame_range = float(context_bone_anim_keys[j + 1][1] - context_bone_anim_keys[j - 1][1])
                                            frame_range_fac1 = (context_bone_anim_keys[j + 1][1] - context_bone_anim_keys[j][1]) / frame_range
                                            frame_range_fac2 = 1.0 - frame_range_fac1

                                            if abs(((context_bone_anim_keys[j - 1][0] * frame_range_fac1 + context_bone_anim_keys[j + 1][0] * frame_range_fac2)) - context_bone_anim_keys[j][0]) < ANIM_OPTIMIZE_PRECISSION_FLOAT:
                                                del context_bone_anim_keys[j]
                                            else:
                                                j -= 1

                                        # keep the index below the list length
                                        if j > len(context_bone_anim_keys) - 2:
                                            j = len(context_bone_anim_keys) - 2

                                    if len(context_bone_anim_keys) == 2 and context_bone_anim_keys[0][0] == context_bone_anim_keys[1][0]:

                                        # This axis has no moton, its okay to skip KeyCount and Keys in this case
                                        # pass

                                        # better write one, otherwise we loose poses with no animation
                                        file.write('\n\t\t\t\t\t\tKeyCount: 1')
                                        file.write('\n\t\t\t\t\t\tKey: ')
                                        file.write('\n\t\t\t\t\t\t\t%i,%.15f,L' % (fbx_time(start), context_bone_anim_keys[0][0]))
                                    else:
                                        # We only need to write these if there is at least one
                                        file.write('\n\t\t\t\t\t\tKeyCount: %i' % len(context_bone_anim_keys))
                                        file.write('\n\t\t\t\t\t\tKey: ')
                                        for val, frame in context_bone_anim_keys:
                                            if frame != context_bone_anim_keys[0][1]:  # not the first
                                                file.write(',')
                                            # frame is already one less then blenders frame
                                            file.write('\n\t\t\t\t\t\t\t%i,%.15f,L' % (fbx_time(frame), val))

                                if i == 0:
                                    file.write('\n\t\t\t\t\t\tColor: 1,0,0')
                                elif i == 1:
                                    file.write('\n\t\t\t\t\t\tColor: 0,1,0')
                                elif i == 2:
                                    file.write('\n\t\t\t\t\t\tColor: 0,0,1')

                                file.write('\n\t\t\t\t\t}')
                            file.write('\n\t\t\t\t\tLayerType: %i' % (TX_LAYER + 1))
                            file.write('\n\t\t\t\t}')

                        # ---------------

                        file.write('\n\t\t\t}')
                        file.write('\n\t\t}')

            # end the take
            file.write('\n\t}')

            # end action loop. set original actions
            # do this after every loop incase actions effect eachother.
            for my_arm in ob_arms:
                if my_arm.blenObject.animation_data:
                    my_arm.blenObject.animation_data.action = my_arm.blenAction

        file.write('\n}')

        scene.frame_set(frame_orig)

    else:
        # no animation
        file.write('\n;Takes and animation section')
        file.write('\n;----------------------------------------------------')
        file.write('\n')
        file.write('\nTakes:  {')
        file.write('\n\tCurrent: ""')
        file.write('\n}')

    # write meshes animation
    #for obname, ob, mtx, me, mats, arm, armname in ob_meshes:

    # Clear mesh data Only when writing with modifiers applied
    for me in meshes_to_clear:
        bpy.data.meshes.remove(me)

    # --------------------------- Footer
    if world:
        m = world.mist_settings
        has_mist = m.use_mist
        mist_intense = m.intensity
        mist_start = m.start
        mist_end = m.depth
        mist_height = m.height
        world_hor = world.horizon_color
    else:
        has_mist = mist_intense = mist_start = mist_end = mist_height = 0
        world_hor = 0, 0, 0

    file.write('\n;Version 5 settings')
    file.write('\n;------------------------------------------------------------------')
    file.write('\n')
    file.write('\nVersion5:  {')
    file.write('\n\tAmbientRenderSettings:  {')
    file.write('\n\t\tVersion: 101')
    file.write('\n\t\tAmbientLightColor: %.1f,%.1f,%.1f,0' % tuple(world_amb))
    file.write('\n\t}')
    file.write('\n\tFogOptions:  {')
    file.write('\n\t\tFlogEnable: %i' % has_mist)
    file.write('\n\t\tFogMode: 0')
    file.write('\n\t\tFogDensity: %.3f' % mist_intense)
    file.write('\n\t\tFogStart: %.3f' % mist_start)
    file.write('\n\t\tFogEnd: %.3f' % mist_end)
    file.write('\n\t\tFogColor: %.1f,%.1f,%.1f,1' % tuple(world_hor))
    file.write('\n\t}')
    file.write('\n\tSettings:  {')
    file.write('\n\t\tFrameRate: "%i"' % int(fps))
    file.write('\n\t\tTimeFormat: 1')
    file.write('\n\t\tSnapOnFrames: 0')
    file.write('\n\t\tReferenceTimeIndex: -1')
    file.write('\n\t\tTimeLineStartTime: %i' % fbx_time(start - 1))
    file.write('\n\t\tTimeLineStopTime: %i' % fbx_time(end - 1))
    file.write('\n\t}')
    file.write('\n\tRendererSetting:  {')
    file.write('\n\t\tDefaultCamera: "Producer Perspective"')
    file.write('\n\t\tDefaultViewingMode: 0')
    file.write('\n\t}')
    file.write('\n}')
    file.write('\n')

    # XXX, shouldnt be global!
    sane_name_mapping_ob.clear()
    sane_name_mapping_mat.clear()
    sane_name_mapping_tex.clear()
    sane_name_mapping_take.clear()
    sane_name_mapping_group.clear()

    ob_arms[:] = []
    ob_bones[:] = []
    ob_cameras[:] = []
    ob_lights[:] = []
    ob_meshes[:] = []
    ob_null[:] = []

    # copy images if enabled
# 	if EXP_IMAGE_COPY:
# # 		copy_images( basepath,  [ tex[1] for tex in textures if tex[1] != None ])
# 		bpy.util.copy_images( [ tex[1] for tex in textures if tex[1] != None ], basepath)
    file.close()

    print('export finished in %.4f sec.' % (time.clock() - start_time))
    return {'FINISHED'}


def save(operator, context,
          filepath="",
          use_selection=True,
          batch_mode='OFF',
          BATCH_OWN_DIR=False,
          **kwargs
          ):

    if bpy.ops.object.mode_set.poll():
        bpy.ops.object.mode_set(mode='OBJECT')

    if batch_mode == 'OFF':
        kwargs_mod = kwargs.copy()
        if use_selection:
            kwargs_mod["context_objects"] = context.selected_objects
        else:
            kwargs_mod["context_objects"] = context.scene.objects

        return save_single(operator, context.scene, filepath, **kwargs_mod)
    else:
        fbxpath = filepath

        prefix = os.path.basename(fbxpath)
        if prefix:
            fbxpath = os.path.dirname(fbxpath)

        if not fbxpath.endswith(os.sep):
            fbxpath += os.sep

        if batch_mode == 'GROUP':
            data_seq = bpy.data.groups
        else:
            data_seq = bpy.data.scenes

        # call this function within a loop with BATCH_ENABLE == False
        # no scene switching done at the moment.
        # orig_sce = context.scene

        new_fbxpath = fbxpath  # own dir option modifies, we need to keep an original
        for data in data_seq:  # scene or group
            newname = prefix + bpy.path.clean_name(data.name)

            if BATCH_OWN_DIR:
                new_fbxpath = fbxpath + newname + os.sep
                # path may already exist
                # TODO - might exist but be a file. unlikely but should probably account for it.

                if not os.path.exists(new_fbxpath):
                    os.makedirs(new_fbxpath)

            filepath = new_fbxpath + newname + '.fbx'

            print('\nBatch exporting %s as...\n\t%r' % (data, filepath))

            # XXX don't know what to do with this, probably do the same? (Arystan)
            if batch_mode == 'GROUP':  # group
                # group, so objects update properly, add a dummy scene.
                scene = bpy.data.scenes.new(name="FBX_Temp")
                scene.layers = [True] * 20
                # bpy.data.scenes.active = scene # XXX, cant switch
                for ob_base in data.objects:
                    scene.objects.link(ob_base)

                scene.update()
            else:
                scene = data

                # TODO - BUMMER! Armatures not in the group wont animate the mesh

            # else:  # scene
            #     data_seq.active = data

            # Call self with modified args
            # Dont pass batch options since we already usedt them
            kwargs_batch = kwargs.copy()

            kwargs_batch["context_objects"] = data.objects

            save_single(operator, scene, filepath, **kwargs_batch)

            if batch_mode == 'GROUP':
                # remove temp group scene
                bpy.data.scenes.remove(scene)

        # no active scene changing!
        # bpy.data.scenes.active = orig_sce

        return {'FINISHED'}  # so the script wont run after we have batch exported.




# NOTES (all line numbers correspond to original export_fbx.py (under release/scripts)
# - Draw.PupMenu alternative in 2.5?, temporarily replaced PupMenu with print
# - get rid of bpy.path.clean_name somehow
# + fixed: isinstance(inst, bpy.types.*) doesn't work on RNA objects: line 565
# + get rid of BPyObject_getObjectArmature, move it in RNA?
# - BATCH_ENABLE and BATCH_GROUP options: line 327
# - implement all BPyMesh_* used here with RNA
# - getDerivedObjects is not fully replicated with .dupli* funcs
# - talk to Campbell, this code won't work? lines 1867-1875
# - don't know what those colbits are, do we need them? they're said to be deprecated in DNA_object_types.h: 1886-1893
# - no hq normals: 1900-1901

# TODO

# - bpy.data.remove_scene: line 366
# - bpy.sys.time move to bpy.sys.util?
# - new scene creation, activation: lines 327-342, 368
# - uses bpy.path.abspath, *.relpath - replace at least relpath