export_x3d.py

            fw(ident_step + '/>\n')

    def writeMaterialH3D(ident, material, world,
                         obj, gpu_shader):
        material_id = quoteattr(unique_name(material, 'MA_' + material.name, uuid_cache_material, clean_func=clean_def, sep="_"))

        fw('%s<Material />\n' % ident)
        if material.tag:
            fw('%s<ComposedShader USE=%s />\n' % (ident, material_id))
        else:
            material.tag = True

            # GPU_material_bind_uniforms
            # GPU_begin_object_materials

            #~ CD_MCOL 6
            #~ CD_MTFACE 5
            #~ CD_ORCO 14
            #~ CD_TANGENT 18
            #~ GPU_DATA_16F 7
            #~ GPU_DATA_1F 2
            #~ GPU_DATA_1I 1
            #~ GPU_DATA_2F 3
            #~ GPU_DATA_3F 4
            #~ GPU_DATA_4F 5
            #~ GPU_DATA_4UB 8
            #~ GPU_DATA_9F 6
            #~ GPU_DYNAMIC_LAMP_DYNCO 7
            #~ GPU_DYNAMIC_LAMP_DYNCOL 11
            #~ GPU_DYNAMIC_LAMP_DYNENERGY 10
            #~ GPU_DYNAMIC_LAMP_DYNIMAT 8
            #~ GPU_DYNAMIC_LAMP_DYNPERSMAT 9
            #~ GPU_DYNAMIC_LAMP_DYNVEC 6
            #~ GPU_DYNAMIC_OBJECT_COLOR 5
            #~ GPU_DYNAMIC_OBJECT_IMAT 4
            #~ GPU_DYNAMIC_OBJECT_MAT 2
            #~ GPU_DYNAMIC_OBJECT_VIEWIMAT 3
            #~ GPU_DYNAMIC_OBJECT_VIEWMAT 1
            #~ GPU_DYNAMIC_SAMPLER_2DBUFFER 12
            #~ GPU_DYNAMIC_SAMPLER_2DIMAGE 13
            #~ GPU_DYNAMIC_SAMPLER_2DSHADOW 14

            '''
            inline const char* typeToString( X3DType t ) {
              switch( t ) {
              case     SFFLOAT: return "SFFloat";
              case     MFFLOAT: return "MFFloat";
              case    SFDOUBLE: return "SFDouble";
              case    MFDOUBLE: return "MFDouble";
              case      SFTIME: return "SFTime";
              case      MFTIME: return "MFTime";
              case     SFINT32: return "SFInt32";
              case     MFINT32: return "MFInt32";
              case     SFVEC2F: return "SFVec2f";
              case     MFVEC2F: return "MFVec2f";
              case     SFVEC2D: return "SFVec2d";
              case     MFVEC2D: return "MFVec2d";
              case     SFVEC3F: return "SFVec3f";
              case     MFVEC3F: return "MFVec3f";
              case     SFVEC3D: return "SFVec3d";
              case     MFVEC3D: return "MFVec3d";
              case     SFVEC4F: return "SFVec4f";
              case     MFVEC4F: return "MFVec4f";
              case     SFVEC4D: return "SFVec4d";
              case     MFVEC4D: return "MFVec4d";
              case      SFBOOL: return "SFBool";
              case      MFBOOL: return "MFBool";
              case    SFSTRING: return "SFString";
              case    MFSTRING: return "MFString";
              case      SFNODE: return "SFNode";
              case      MFNODE: return "MFNode";
              case     SFCOLOR: return "SFColor";
              case     MFCOLOR: return "MFColor";
              case SFCOLORRGBA: return "SFColorRGBA";
              case MFCOLORRGBA: return "MFColorRGBA";
              case  SFROTATION: return "SFRotation";
              case  MFROTATION: return "MFRotation";
              case  SFQUATERNION: return "SFQuaternion";
              case  MFQUATERNION: return "MFQuaternion";
              case  SFMATRIX3F: return "SFMatrix3f";
              case  MFMATRIX3F: return "MFMatrix3f";
              case  SFMATRIX4F: return "SFMatrix4f";
              case  MFMATRIX4F: return "MFMatrix4f";
              case  SFMATRIX3D: return "SFMatrix3d";
              case  MFMATRIX3D: return "MFMatrix3d";
              case  SFMATRIX4D: return "SFMatrix4d";
              case  MFMATRIX4D: return "MFMatrix4d";
              case UNKNOWN_X3D_TYPE:
              default:return "UNKNOWN_X3D_TYPE";
            '''
            import gpu

            fw('%s<ComposedShader DEF=%s language="GLSL" >\n' % (ident, material_id))
            ident += '\t'

            shader_url_frag = 'shaders/%s_%s.frag' % (filename_strip, material_id[1:-1])
            shader_url_vert = 'shaders/%s_%s.vert' % (filename_strip, material_id[1:-1])

            # write files
            shader_dir = os.path.join(base_dst, 'shaders')
            if not os.path.isdir(shader_dir):
                os.mkdir(shader_dir)

            # ------------------------------------------------------
            # shader-patch
            field_descr = " <!--- H3D View Matrix Patch -->"
            fw('%s<field name="%s" type="SFMatrix4f" accessType="inputOutput" />%s\n' % (ident, H3D_VIEW_MATRIX, field_descr))
            frag_vars = ["uniform mat4 %s;" % H3D_VIEW_MATRIX]

            # annoying!, we need to track if some of the directional lamp
            # vars are children of the camera or not, since this adjusts how
            # they are patched.
            frag_uniform_var_map = {}

            h3d_material_route.append(
                    '<ROUTE fromNode="%s" fromField="glModelViewMatrix" toNode=%s toField="%s" />%s' %
                    (H3D_TOP_LEVEL, material_id, H3D_VIEW_MATRIX, field_descr))
            # ------------------------------------------------------

            for uniform in gpu_shader['uniforms']:
                if uniform['type'] == gpu.GPU_DYNAMIC_SAMPLER_2DIMAGE:
                    field_descr = " <!--- Dynamic Sampler 2d Image -->"
                    fw('%s<field name="%s" type="SFNode" accessType="inputOutput">%s\n' % (ident, uniform['varname'], field_descr))
                    writeImageTexture(ident + '\t', uniform['image'])
                    fw('%s</field>\n' % ident)

                elif uniform['type'] == gpu.GPU_DYNAMIC_LAMP_DYNCO:
                    lamp_obj = uniform['lamp']
                    frag_uniform_var_map[uniform['varname']] = lamp_obj

                    if uniform['datatype'] == gpu.GPU_DATA_3F:  # should always be true!
                        lamp_obj_id = quoteattr(unique_name(lamp_obj, LA_ + lamp_obj.name, uuid_cache_lamp, clean_func=clean_def, sep="_"))
                        lamp_obj_transform_id = quoteattr(unique_name(lamp_obj, lamp_obj.name, uuid_cache_object, clean_func=clean_def, sep="_"))

                        value = '%.6f %.6f %.6f' % (global_matrix * lamp_obj.matrix_world).to_translation()[:]
                        field_descr = " <!--- Lamp DynCo '%s' -->" % lamp_obj.name
                        fw('%s<field name="%s" type="SFVec3f" accessType="inputOutput" value="%s" />%s\n' % (ident, uniform['varname'], value, field_descr))

                        # ------------------------------------------------------
                        # shader-patch
                        field_descr = " <!--- Lamp DynCo '%s' (shader patch) -->" % lamp_obj.name
                        fw('%s<field name="%s_transform" type="SFMatrix4f" accessType="inputOutput" />%s\n' % (ident, uniform['varname'], field_descr))

                        # transform
                        frag_vars.append("uniform mat4 %s_transform;" % uniform['varname'])
                        h3d_material_route.append(
                                '<ROUTE fromNode=%s fromField="accumulatedForward" toNode=%s toField="%s_transform" />%s' %
                                (suffix_quoted_str(lamp_obj_transform_id, _TRANSFORM), material_id, uniform['varname'], field_descr))

                        h3d_material_route.append(
                                '<ROUTE fromNode=%s fromField="location" toNode=%s toField="%s" /> %s' %
                                (lamp_obj_id, material_id, uniform['varname'], field_descr))
                        # ------------------------------------------------------

                    else:
                        assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_LAMP_DYNCOL:
                    # odd  we have both 3, 4 types.
                    lamp_obj = uniform['lamp']
                    frag_uniform_var_map[uniform['varname']] = lamp_obj

                    lamp = lamp_obj.data
                    value = '%.6f %.6f %.6f' % (lamp.color * lamp.energy)[:]
                    field_descr = " <!--- Lamp DynColor '%s' -->" % lamp_obj.name
                    if uniform['datatype'] == gpu.GPU_DATA_3F:
                        fw('%s<field name="%s" type="SFVec3f" accessType="inputOutput" value="%s" />%s\n' % (ident, uniform['varname'], value, field_descr))
                    elif uniform['datatype'] == gpu.GPU_DATA_4F:
                        fw('%s<field name="%s" type="SFVec4f" accessType="inputOutput" value="%s 1.0" />%s\n' % (ident, uniform['varname'], value, field_descr))
                    else:
                        assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_LAMP_DYNENERGY:
                    # not used ?
                    assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_LAMP_DYNVEC:
                    lamp_obj = uniform['lamp']
                    frag_uniform_var_map[uniform['varname']] = lamp_obj

                    if uniform['datatype'] == gpu.GPU_DATA_3F:
                        lamp_obj = uniform['lamp']
                        value = '%.6f %.6f %.6f' % ((global_matrix * lamp_obj.matrix_world).to_quaternion() * mathutils.Vector((0.0, 0.0, 1.0))).normalized()[:]
                        field_descr = " <!--- Lamp DynDirection '%s' -->" % lamp_obj.name
                        fw('%s<field name="%s" type="SFVec3f" accessType="inputOutput" value="%s" />%s\n' % (ident, uniform['varname'], value, field_descr))

                        # route so we can have the lamp update the view
                        if h3d_is_object_view(scene, lamp_obj):
                            lamp_id = quoteattr(unique_name(lamp_obj, LA_ + lamp_obj.name, uuid_cache_lamp, clean_func=clean_def, sep="_"))
                            h3d_material_route.append(
                                '<ROUTE fromNode=%s fromField="direction" toNode=%s toField="%s" />%s' %
                                        (lamp_id, material_id, uniform['varname'], field_descr))

                    else:
                        assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_OBJECT_VIEWIMAT:
                    frag_uniform_var_map[uniform['varname']] = None
                    if uniform['datatype'] == gpu.GPU_DATA_16F:
                        field_descr = " <!--- Object View Matrix Inverse '%s' -->" % obj.name
                        fw('%s<field name="%s" type="SFMatrix4f" accessType="inputOutput" />%s\n' % (ident, uniform['varname'], field_descr))

                        h3d_material_route.append(
                            '<ROUTE fromNode="%s" fromField="glModelViewMatrixInverse" toNode=%s toField="%s" />%s' %
                                    (H3D_TOP_LEVEL, material_id, uniform['varname'], field_descr))
                    else:
                        assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_OBJECT_IMAT:
                    frag_uniform_var_map[uniform['varname']] = None
                    if uniform['datatype'] == gpu.GPU_DATA_16F:
                        value = ' '.join(['%.6f' % f for v in (global_matrix * obj.matrix_world).inverted().transposed() for f in v])
                        field_descr = " <!--- Object Invertex Matrix '%s' -->" % obj.name
                        fw('%s<field name="%s" type="SFMatrix4f" accessType="inputOutput" value="%s" />%s\n' % (ident, uniform['varname'], value, field_descr))
                    else:
                        assert(0)

                elif uniform['type'] == gpu.GPU_DYNAMIC_SAMPLER_2DSHADOW:
                    pass  # XXX, shadow buffers not supported.

                elif uniform['type'] == gpu.GPU_DYNAMIC_SAMPLER_2DBUFFER:
                    frag_uniform_var_map[uniform['varname']] = None

                    if uniform['datatype'] == gpu.GPU_DATA_1I:
                        if 1:
                            tex = uniform['texpixels']
                            value = []
                            for i in range(0, len(tex) - 1, 4):
                                col = tex[i:i + 4]
                                value.append('0x%.2x%.2x%.2x%.2x' % (col[0], col[1], col[2], col[3]))

                            field_descr = " <!--- Material Buffer -->"
                            fw('%s<field name="%s" type="SFNode" accessType="inputOutput">%s\n' % (ident, uniform['varname'], field_descr))

                            ident += '\t'

                            ident_step = ident + (' ' * (-len(ident) + \
                            fw('%s<PixelTexture \n' % ident)))
                            fw(ident_step + 'repeatS="false"\n')
                            fw(ident_step + 'repeatT="false"\n')

                            fw(ident_step + 'image="%s 1 4 %s"\n' % (len(value), " ".join(value)))

                            fw(ident_step + '/>\n')

                            ident = ident[:-1]

                            fw('%s</field>\n' % ident)

                            #for i in range(0, 10, 4)
                            #value = ' '.join(['%d' % f for f in uniform['texpixels']])
                            # value = ' '.join(['%.6f' % (f / 256) for f in uniform['texpixels']])

                            #fw('%s<field name="%s" type="SFInt32" accessType="inputOutput" value="%s" />%s\n' % (ident, uniform['varname'], value, field_descr))
                            #print('test', len(uniform['texpixels']))
                    else:
                        assert(0)
                else:
                    print("SKIPPING", uniform['type'])

            file_frag = open(os.path.join(base_dst, shader_url_frag), 'w', encoding='utf-8')
            file_frag.write(gpu_shader['fragment'])
            file_frag.close()
            # patch it
            h3d_shader_glsl_frag_patch(os.path.join(base_dst, shader_url_frag),
                                       scene,
                                       frag_vars,
                                       frag_uniform_var_map,
                                       )

            file_vert = open(os.path.join(base_dst, shader_url_vert), 'w', encoding='utf-8')
            file_vert.write(gpu_shader['vertex'])
            file_vert.close()

            fw('%s<ShaderPart type="FRAGMENT" url=%s />\n' % (ident, quoteattr(shader_url_frag)))
            fw('%s<ShaderPart type="VERTEX" url=%s />\n' % (ident, quoteattr(shader_url_vert)))
            ident = ident[:-1]

            fw('%s</ComposedShader>\n' % ident)

    def writeImageTexture(ident, image):
        image_id = quoteattr(unique_name(image, IM_ + image.name, uuid_cache_image, clean_func=clean_def, sep="_"))

        if image.tag:
            fw('%s<ImageTexture USE=%s />\n' % (ident, image_id))
        else:
            image.tag = True

            ident_step = ident + (' ' * (-len(ident) + \
            fw('%s<ImageTexture ' % ident)))
            fw('DEF=%s\n' % image_id)

            # collect image paths, can load multiple
            # [relative, name-only, absolute]
            filepath = image.filepath
            filepath_full = bpy.path.abspath(filepath, library=image.library)
            filepath_ref = bpy_extras.io_utils.path_reference(filepath_full, base_src, base_dst, path_mode, "textures", copy_set, image.library)
            filepath_base = os.path.basename(filepath_full)

            images = [
                filepath_ref,
                filepath_base,
                filepath_full,
            ]

            images = [f.replace('\\', '/') for f in images]
            images = [f for i, f in enumerate(images) if f not in images[:i]]

            fw(ident_step + "url='%s' " % ' '.join(['"%s"' % escape(f) for f in images]))
            fw(ident_step + '/>\n')

    def writeBackground(ident, world):

        if world is None:
            return

        # note, not re-used
        world_id = quoteattr(unique_name(world, WO_ + world.name, uuid_cache_world, clean_func=clean_def, sep="_"))

        blending = world.use_sky_blend, world.use_sky_paper, world.use_sky_real

        grd_triple = clamp_color(world.horizon_color)
        sky_triple = clamp_color(world.zenith_color)
        mix_triple = clamp_color((grd_triple[i] + sky_triple[i]) / 2.0 for i in range(3))

        ident_step = ident + (' ' * (-len(ident) + \
        fw('%s<Background ' % ident)))
        fw('DEF=%s\n' % world_id)
        # No Skytype - just Hor color
        if blending == (False, False, False):
            fw(ident_step + 'groundColor="%.3f %.3f %.3f"\n' % grd_triple)
            fw(ident_step + 'skyColor="%.3f %.3f %.3f"\n' % grd_triple)
        # Blend Gradient
        elif blending == (True, False, False):
            fw(ident_step + 'groundColor="%.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (grd_triple + mix_triple))
            fw(ident_step + 'groundAngle="1.57, 1.57"\n')
            fw(ident_step + 'skyColor="%.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (sky_triple + mix_triple))
            fw(ident_step + 'skyAngle="1.57, 1.57"\n')
        # Blend+Real Gradient Inverse
        elif blending == (True, False, True):
            fw(ident_step + 'groundColor="%.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (sky_triple + grd_triple))
            fw(ident_step + 'groundAngle="1.57"\n')
            fw(ident_step + 'skyColor="%.3f %.3f %.3f, %.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (sky_triple + grd_triple + sky_triple))
            fw(ident_step + 'skyAngle="1.57, 3.14159"\n')
        # Paper - just Zen Color
        elif blending == (False, False, True):
            fw(ident_step + 'groundColor="%.3f %.3f %.3f"\n' % sky_triple)
            fw(ident_step + 'skyColor="%.3f %.3f %.3f"\n' % sky_triple)
        # Blend+Real+Paper - komplex gradient
        elif blending == (True, True, True):
            fw(ident_step + 'groundColor="%.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (sky_triple + grd_triple))
            fw(ident_step + 'groundAngle="1.57, 1.57"\n')
            fw(ident_step + 'skyColor="%.3f %.3f %.3f, %.3f %.3f %.3f"\n' % (sky_triple + grd_triple))
            fw(ident_step + 'skyAngle="1.57, 1.57"\n')
        # Any Other two colors
        else:
            fw(ident_step + 'groundColor="%.3f %.3f %.3f"\n' % grd_triple)
            fw(ident_step + 'skyColor="%.3f %.3f %.3f"\n' % sky_triple)

        for tex in bpy.data.textures:
            if tex.type == 'IMAGE' and tex.image:
                namemat = tex.name
                pic = tex.image
                basename = quoteattr(bpy.path.basename(pic.filepath))

                if namemat == 'back':
                    fw(ident_step + 'backUrl=%s\n' % basename)
                elif namemat == 'bottom':
                    fw(ident_step + 'bottomUrl=%s\n' % basename)
                elif namemat == 'front':
                    fw(ident_step + 'frontUrl=%s\n' % basename)
                elif namemat == 'left':
                    fw(ident_step + 'leftUrl=%s\n' % basename)
                elif namemat == 'right':
                    fw(ident_step + 'rightUrl=%s\n' % basename)
                elif namemat == 'top':
                    fw(ident_step + 'topUrl=%s\n' % basename)

        fw(ident_step + '/>\n')

    # -------------------------------------------------------------------------
    # Export Object Hierarchy (recursively called)
    # -------------------------------------------------------------------------
    def export_object(ident, obj_main_parent, obj_main, obj_children):
        world = scene.world
        free, derived = create_derived_objects(scene, obj_main)

        if use_hierarchy:
            obj_main_matrix_world = obj_main.matrix_world
            if obj_main_parent:
                obj_main_matrix = obj_main_parent.matrix_world.inverted() * obj_main_matrix_world
            else:
                obj_main_matrix = obj_main_matrix_world
            obj_main_matrix_world_invert = obj_main_matrix_world.inverted()

            obj_main_id = quoteattr(unique_name(obj_main, obj_main.name, uuid_cache_object, clean_func=clean_def, sep="_"))

            ident = writeTransform_begin(ident, obj_main_matrix if obj_main_parent else global_matrix * obj_main_matrix, suffix_quoted_str(obj_main_id, _TRANSFORM))

        for obj, obj_matrix in (() if derived is None else derived):
            obj_type = obj.type

            if use_hierarchy:
                # make transform node relative
                obj_matrix = obj_main_matrix_world_invert * obj_matrix

            # H3D - use for writing a dummy transform parent
            is_dummy_tx = False

            if obj_type == 'CAMERA':
                writeViewpoint(ident, obj, obj_matrix, scene)

                if use_h3d and scene.camera == obj:
                    view_id = uuid_cache_view[obj]
                    fw('%s<Transform DEF="%s">\n' % (ident, H3D_CAMERA_FOLLOW))
                    h3d_material_route.extend([
                        '<ROUTE fromNode="%s" fromField="totalPosition" toNode="%s" toField="translation" />' % (view_id, H3D_CAMERA_FOLLOW),
                        '<ROUTE fromNode="%s" fromField="totalOrientation" toNode="%s" toField="rotation" />' % (view_id, H3D_CAMERA_FOLLOW),
                        ])
                    is_dummy_tx = True
                    ident += '\t'

            elif obj_type in {'MESH', 'CURVE', 'SURFACE', 'FONT'}:
                if (obj_type != 'MESH') or (use_apply_modifiers and obj.is_modified(scene, 'PREVIEW')):
                    try:
                        me = obj.to_mesh(scene, use_apply_modifiers, 'PREVIEW')
                    except:
                        me = None
                    do_remove = True
                else:
                    me = obj.data
                    do_remove = False

                if me is not None:
                    # ensure unique name, we could also do this by
                    # postponing mesh removal, but clearing data - TODO
                    if do_remove:
                        me.name = obj.name.rstrip("1234567890").rstrip(".")
                        me_name_new = me_name_org = me.name
                        count = 0
                        while me_name_new in mesh_name_set:
                            me.name = "%.17s.%03d" % (me_name_org, count)
                            me_name_new = me.name
                            count += 1
                        mesh_name_set.add(me_name_new)
                        del me_name_new, me_name_org, count
                    # done

                    writeIndexedFaceSet(ident, obj, me, obj_matrix, world)

                    # free mesh created with create_mesh()
                    if do_remove:
                        bpy.data.meshes.remove(me)

            elif obj_type == 'LAMP':
                data = obj.data
                datatype = data.type
                if datatype == 'POINT':
                    writePointLight(ident, obj, obj_matrix, data, world)
                elif datatype == 'SPOT':
                    writeSpotLight(ident, obj, obj_matrix, data, world)
                elif datatype == 'SUN':
                    writeDirectionalLight(ident, obj, obj_matrix, data, world)
                else:
                    writeDirectionalLight(ident, obj, obj_matrix, data, world)
            else:
                #print "Info: Ignoring [%s], object type [%s] not handle yet" % (object.name,object.getType)
                pass

        if free:
            free_derived_objects(obj_main)

        # ---------------------------------------------------------------------
        # write out children recursively
        # ---------------------------------------------------------------------
        for obj_child, obj_child_children in obj_children:
            export_object(ident, obj_main, obj_child, obj_child_children)

        if is_dummy_tx:
            ident = ident[:-1]
            fw('%s</Transform>\n' % ident)
            is_dummy_tx = False

        if use_hierarchy:
            ident = writeTransform_end(ident)

    # -------------------------------------------------------------------------
    # Main Export Function
    # -------------------------------------------------------------------------
    def export_main():
        world = scene.world

        # tag un-exported IDs
        bpy.data.meshes.tag(False)
        bpy.data.materials.tag(False)
        bpy.data.images.tag(False)

        print('Info: starting X3D export to %r...' % file.name)
        ident = ''
        ident = writeHeader(ident)

        writeNavigationInfo(ident, scene)
        writeBackground(ident, world)
        writeFog(ident, world)

        ident = '\t\t'

        if use_selection:
            objects = [obj for obj in scene.objects if obj.is_visible(scene) and obj.select]
        else:
            objects = [obj for obj in scene.objects if obj.is_visible(scene)]

        if use_hierarchy:
            objects_hierarchy = build_hierarchy(objects)
        else:
            objects_hierarchy = ((obj, []) for obj in objects)

        for obj_main, obj_main_children in objects_hierarchy:
            export_object(ident, None, obj_main, obj_main_children)

        ident = writeFooter(ident)

    export_main()

    # -------------------------------------------------------------------------
    # global cleanup
    # -------------------------------------------------------------------------
    file.close()

    if use_h3d:
        bpy.data.materials.remove(gpu_shader_dummy_mat)

    # copy all collected files.
    # print(copy_set)
    bpy_extras.io_utils.path_reference_copy(copy_set)

    print('Info: finished X3D export to %r' % file.name)


##########################################################
# Callbacks, needed before Main
##########################################################


def gzip_open_utf8(filepath, mode):
    """Workaround for py3k only allowing binary gzip writing"""

    import gzip

    # need to investigate encoding
    file = gzip.open(filepath, mode)
    write_real = file.write

    def write_wrap(data):
        return write_real(data.encode("utf-8"))

    file.write = write_wrap

    return file


def save(operator, context, filepath="",
         use_selection=True,
         use_apply_modifiers=False,
         use_triangulate=False,
         use_normals=False,
         use_compress=False,
         use_hierarchy=True,
         use_h3d=False,
         global_matrix=None,
         path_mode='AUTO',
         name_decorations=True,
         ):

    bpy.path.ensure_ext(filepath, '.x3dz' if use_compress else '.x3d')

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

    if use_compress:
        file = gzip_open_utf8(filepath, 'w')
    else:
        file = open(filepath, 'w', encoding='utf-8')

    if global_matrix is None:
        global_matrix = mathutils.Matrix()

    export(file,
           global_matrix,
           context.scene,
           use_apply_modifiers=use_apply_modifiers,
           use_selection=use_selection,
           use_triangulate=use_triangulate,
           use_normals=use_normals,
           use_hierarchy=use_hierarchy,
           use_h3d=use_h3d,
           path_mode=path_mode,
           name_decorations=name_decorations,
           )

    return {'FINISHED'}