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__author__ = ["Anthony D'Agostino (Scorpius)", "Aurel Wildfellner"]
__version__ = '0.2'
__bpydoc__ = """\
This script imports Raw Triangle File format files to Blender.

The raw triangle format is very simple; it has no verts or faces lists.
It's just a simple ascii text file with the vertices of each triangle
listed on each line. In addition, a line with 12 values will be
imported as a quad. This may be in conflict with some other
applications, which use a raw format, but this is how it was
implemented back in blender 2.42.

Usage:
Execute this script from the "File->Import" menu and choose a Raw file to
open.

Notes:
Generates the standard verts and faces lists, but without duplicate
verts. Only *exact* duplicates are removed, there is no way to specify a
tolerance.
"""



import bpy

# move those to a utility modul
from bpy_extras.io_utils import unpack_face_list, unpack_list # TODO, make generic


def readMesh(filename, objName):
    file = open(filename, "rb")

    def line_to_face(line):
        # Each triplet is an xyz float
        line_split = []
        try:
            line_split = list(map(float, line.split()))
        except:
            return None

        if len(line_split) == 9: # Tri
            f1, f2, f3, f4, f5, f6, f7, f8, f9 = line_split
            return [(f1, f2, f3), (f4, f5, f6), (f7, f8, f9)]
        elif len(line_split) == 12: # Quad
            f1, f2, f3, f4, f5, f6, f7, f8, f9, A, B, C = line_split
            return [(f1, f2, f3), (f4, f5, f6), (f7, f8, f9), (A, B, C)]
        else:
            return None


    faces = []
    for line in file.readlines():
        face = line_to_face(line)
        if face:
            faces.append(face)

    file.close()

    # Generate verts and faces lists, without duplicates
    verts = []
    coords = {}
    index_tot = 0
    faces_indices = []
    
    for f in faces:
        fi = []
        for i, v in enumerate(f):
            index = coords.get(v)

            if index is None:
                index = coords[v] = index_tot
                index_tot += 1
                verts.append(v)

            fi.append(index)

        faces_indices.append(fi)

    mesh = bpy.data.meshes.new(objName)
    mesh.from_pydata(verts, [], faces_indices)

    return mesh


def addMeshObj(mesh, objName):
    scn = bpy.context.scene

    for o in scn.objects:
        o.select = False

    mesh.update()
    mesh.validate()

    nobj = bpy.data.objects.new(objName, mesh)
    scn.objects.link(nobj)
    nobj.select = True

    if scn.objects.active is None or scn.objects.active.mode == 'OBJECT':
        scn.objects.active = nobj


from bpy.props import *

class RawImporter(bpy.types.Operator):
    '''Load Raw triangle mesh data'''
    bl_idname = "import_mesh.raw"
    bl_label = "Import RAW"

    filepath = StringProperty(name="File Path", description="Filepath used for importing the RAW file", maxlen=1024, default="", subtype='FILE_PATH')

    def execute(self, context):

        #convert the filename to an object name
        objName = bpy.path.display_name(self.filepath.split("\\")[-1].split("/")[-1])

        mesh = readMesh(self.filepath, objName)
        addMeshObj(mesh, objName)

        return {'FINISHED'}

    def invoke(self, context, event):
        wm = context.window_manager
        wm.fileselect_add(self)
        return {'RUNNING_MODAL'}

# package manages registering
