io_mesh_raw/export_raw.py

   1 # ##### BEGIN GPL LICENSE BLOCK #####
   2 #
   3 #  This program is free software; you can redistribute it and/or
   4 #  modify it under the terms of the GNU General Public License
   5 #  as published by the Free Software Foundation; either version 2
   6 #  of the License, or (at your option) any later version.
   7 #
   8 #  This program is distributed in the hope that it will be useful,
   9 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 #  GNU General Public License for more details.
  12 #
  13 #  You should have received a copy of the GNU General Public License
  14 #  along with this program; if not, write to the Free Software Foundation,
  15 #  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16 #
  17 # ##### END GPL LICENSE BLOCK #####
  18
  19 # <pep8-80 compliant>
  20
  21 """
  22 This script exports a Mesh to a RAW triangle format file.
  23
  24 The raw triangle format is very simple; it has no verts or faces lists.
  25 It's just a simple ascii text file with the vertices of each triangle
  26 listed on each line. In addition, also quads can be exported as a line
  27 of 12 values (this was the default before blender 2.5). Now default
  28 settings will triangulate the mesh.
  29
  30 Usage:
  31 Execute this script from the "File->Export" menu. You can select
  32 whether modifiers should be applied and if the mesh is triangulated.
  33
  34 """
  35
  36 import bpy
  37
  38
  39 def faceToTriangles(face):
  40     triangles = []
  41     if len(face) == 4:
  42         triangles.append([face[0], face[1], face[2]])
  43         triangles.append([face[2], face[3], face[0]])
  44     else:
  45         triangles.append(face)
  46
  47     return triangles
  48
  49
  50 def faceValues(face, mesh, matrix):
  51     fv = []
  52     for verti in face.vertices:
  53         fv.append((matrix * mesh.vertices[verti].co)[:])
  54     return fv
  55
  56
  57 def faceToLine(face):
  58     return " ".join([("%.6f %.6f %.6f" % v) for v in face] + ["\n"])
  59
  60
  61 def write(filepath,
  62           applyMods=True,
  63           triangulate=True,
  64           ):
  65
  66     scene = bpy.context.scene
  67
  68     faces = []
  69     for obj in bpy.context.selected_objects:
  70         if applyMods or obj.type != 'MESH':
  71             try:
  72                 me = obj.to_mesh(scene, True, "PREVIEW")
  73             except:
  74                 me = None
  75             is_tmp_mesh = True
  76         else:
  77             me = obj.data
  78             if not me.tessfaces and me.polygons:
  79                 me.calc_tessface()
  80             is_tmp_mesh = False
  81
  82         if me is not None:
  83             matrix = obj.matrix_world.copy()
  84             for face in me.tessfaces:
  85                 fv = faceValues(face, me, matrix)
  86                 if triangulate:
  87                     faces.extend(faceToTriangles(fv))
  88                 else:
  89                     faces.append(fv)
  90
  91             if is_tmp_mesh:
  92                 bpy.data.meshes.remove(me)
  93
  94     # write the faces to a file
  95     file = open(filepath, "w")
  96     for face in faces:
  97         file.write(faceToLine(face))
  98     file.close()