__init__.py

# ##### BEGIN GPL LICENSE BLOCK #####
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
#  of the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# ##### END GPL LICENSE BLOCK #####

# <pep8 compliant>

bl_info = {
    "name": "Wavefront OBJ format",
    "author": "Campbell Barton",
    "blender": (2, 5, 7),
    "api": 35622,
    "location": "File > Import-Export",
    "description": "Import-Export OBJ, Import OBJ mesh, UV's, materials and textures",
    "warning": "",
    "wiki_url": "http://wiki.blender.org/index.php/Extensions:2.5/Py/"\
        "Scripts/Import-Export/Wavefront_OBJ",
    "tracker_url": "",
    "support": 'OFFICIAL',
    "category": "Import-Export"}

# To support reload properly, try to access a package var, if it's there, reload everything
if "bpy" in locals():
    import imp
    if "import_obj" in locals():
        imp.reload(import_obj)
    if "export_obj" in locals():
        imp.reload(export_obj)


import bpy
from bpy.props import BoolProperty, FloatProperty, StringProperty, EnumProperty
from bpy_extras.io_utils import ExportHelper, ImportHelper, path_reference_mode, axis_conversion


class ImportOBJ(bpy.types.Operator, ImportHelper):
    '''Load a Wavefront OBJ File'''
    bl_idname = "import_scene.obj"
    bl_label = "Import OBJ"
    bl_options = {'PRESET'}

    filename_ext = ".obj"
    filter_glob = StringProperty(default="*.obj;*.mtl", options={'HIDDEN'})

    use_ngons = BoolProperty(name="NGons", description="Import faces with more then 4 verts as fgons", default=True)
    use_edges = BoolProperty(name="Lines", description="Import lines and faces with 2 verts as edge", default=True)
    use_smooth_groups = BoolProperty(name="Smooth Groups", description="Surround smooth groups by sharp edges", default=True)

    use_split_objects = BoolProperty(name="Object", description="Import OBJ Objects into Blender Objects", default=True)
    use_split_groups = BoolProperty(name="Group", description="Import OBJ Groups into Blender Objects", default=True)

    use_groups_as_vgroups = BoolProperty(name="Poly Groups", description="Import OBJ groups as vertex groups.", default=False)

    use_image_search = BoolProperty(name="Image Search", description="Search subdirs for any assosiated images (Warning, may be slow)", default=True)

    split_mode = EnumProperty(
            name="Smoothing",
            items=(('ON', "Split", "Split imported meshes"),
                   ('OFF', "Keep Vert Order", "Maintain vertex order"),
                   ),
            )

    global_clamp_size = FloatProperty(name="Clamp Scale", description="Clamp the size to this maximum (Zero to Disable)", min=0.0, max=1000.0, soft_min=0.0, soft_max=1000.0, default=0.0)
    axis_forward = EnumProperty(
            name="Forward",
            items=(('X', "X Forward", ""),
                   ('Y', "Y Forward", ""),
                   ('Z', "Z Forward", ""),
                   ('-X', "-X Forward", ""),
                   ('-Y', "-Y Forward", ""),
                   ('-Z', "-Z Forward", ""),
                   ),
            default='-Z',
            )

    axis_up = EnumProperty(
            name="Up",
            items=(('X', "X Up", ""),
                   ('Y', "Y Up", ""),
                   ('Z', "Z Up", ""),
                   ('-X', "-X Up", ""),
                   ('-Y', "-Y Up", ""),
                   ('-Z', "-Z Up", ""),
                   ),
            default='Y',
            )

    # fake prop, only disables split.
    # keep_vertex_order = BoolProperty(name="Keep Vert Order", description="Keep vert and face order, disables split options, enable for morph targets", default= True)

    def execute(self, context):
        # print("Selected: " + context.active_object.name)
        from . import import_obj
        from mathutils import Matrix

        if self.split_mode == 'OFF':
            self.use_split_objects = False
            self.use_split_groups = False
        else:
            self.use_groups_as_vgroups = False

        keywords = self.as_keywords(ignore=("axis_forward", "axis_up", "filter_glob", "split_mode"))

        global_matrix = axis_conversion(from_forward=self.axis_forward, from_up=self.axis_up).to_4x4()
        keywords["global_matrix"] = global_matrix

        return import_obj.load(self, context, **keywords)

    def draw(self, context):
        layout = self.layout

        row = layout.row(align=True)
        row.prop(self, "use_ngons")
        row.prop(self, "use_edges")

        layout.prop(self, "use_smooth_groups")

        box = layout.box()
        row = box.row()
        row.prop(self, "split_mode", expand=True)

        row = box.row()
        if self.split_mode == 'ON':
            row.label(text="Split by:")
            row.prop(self, "use_split_objects")
            row.prop(self, "use_split_groups")
        else:
            row.prop(self, "use_groups_as_vgroups")

        row = layout.split(percentage=0.67)
        row.prop(self, "global_clamp_size")
        layout.prop(self, "axis_forward")
        layout.prop(self, "axis_up")

        layout.prop(self, "use_image_search")


class ExportOBJ(bpy.types.Operator, ExportHelper):
    '''Save a Wavefront OBJ File'''

    bl_idname = "export_scene.obj"
    bl_label = 'Export OBJ'
    bl_options = {'PRESET'}

    filename_ext = ".obj"
    filter_glob = StringProperty(default="*.obj;*.mtl", options={'HIDDEN'})

    # List of operator properties, the attributes will be assigned
    # to the class instance from the operator settings before calling.

    # context group
    use_selection = BoolProperty(name="Selection Only", description="Export selected objects only", default=False)
    use_all_scenes = BoolProperty(name="All Scenes", description="", default=False)
    use_animation = BoolProperty(name="Animation", description="", default=False)

    # object group
    use_apply_modifiers = BoolProperty(name="Apply Modifiers", description="Apply modifiers (preview resolution)", default=True)

    # extra data group
    use_edges = BoolProperty(name="Edges", description="", default=True)
    use_normals = BoolProperty(name="Normals", description="", default=False)
    use_hq_normals = BoolProperty(name="High Quality Normals", description="", default=True)
    use_uvs = BoolProperty(name="UVs", description="", default=True)
    use_materials = BoolProperty(name="Materials", description="", default=True)
    # copy_images = BoolProperty(name="Copy Images", description="", default=False)
    use_triangles = BoolProperty(name="Triangulate", description="", default=False)
    use_vertex_groups = BoolProperty(name="Polygroups", description="", default=False)
    use_nurbs = BoolProperty(name="Nurbs", description="", default=False)

    # grouping group
    use_blen_objects = BoolProperty(name="Objects as OBJ Objects", description="", default=True)
    group_by_object = BoolProperty(name="Objects as OBJ Groups ", description="", default=False)
    group_by_material = BoolProperty(name="Material Groups", description="", default=False)
    keep_vertex_order = BoolProperty(name="Keep Vertex Order", description="", default=False)

    global_scale = FloatProperty(name="Scale", description="Scale all data, (Note! some imports dont support scaled armatures)", min=0.01, max=1000.0, soft_min=0.01, soft_max=1000.0, default=1.0)

    axis_forward = EnumProperty(
            name="Forward",
            items=(('X', "X Forward", ""),
                   ('Y', "Y Forward", ""),
                   ('Z', "Z Forward", ""),
                   ('-X', "-X Forward", ""),
                   ('-Y', "-Y Forward", ""),
                   ('-Z', "-Z Forward", ""),
                   ),
            default='-Z',
            )

    axis_up = EnumProperty(
            name="Up",
            items=(('X', "X Up", ""),
                   ('Y', "Y Up", ""),
                   ('Z', "Z Up", ""),
                   ('-X', "-X Up", ""),
                   ('-Y', "-Y Up", ""),
                   ('-Z', "-Z Up", ""),
                   ),
            default='Y',
            )

    path_mode = path_reference_mode

    def execute(self, context):
        from . import export_obj

        from mathutils import Matrix
        keywords = self.as_keywords(ignore=("axis_forward", "axis_up", "global_scale", "check_existing", "filter_glob"))

        global_matrix = Matrix()
        global_matrix[0][0] = global_matrix[1][1] = global_matrix[2][2] = self.global_scale
        global_matrix = global_matrix * axis_conversion(to_forward=self.axis_forward, to_up=self.axis_up).to_4x4()
        keywords["global_matrix"] = global_matrix
        return export_obj.save(self, context, **keywords)


def menu_func_import(self, context):
    self.layout.operator(ImportOBJ.bl_idname, text="Wavefront (.obj)")


def menu_func_export(self, context):
    self.layout.operator(ExportOBJ.bl_idname, text="Wavefront (.obj)")


def register():
    bpy.utils.register_module(__name__)

    bpy.types.INFO_MT_file_import.append(menu_func_import)
    bpy.types.INFO_MT_file_export.append(menu_func_export)


def unregister():
    bpy.utils.unregister_module(__name__)

    bpy.types.INFO_MT_file_import.remove(menu_func_import)
    bpy.types.INFO_MT_file_export.remove(menu_func_export)


# CONVERSION ISSUES
# - matrix problem
# - duplis - only tested dupliverts
# - all scenes export
# + normals calculation

if __name__ == "__main__":
    register()