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radiosity_export.py

#!BPY

"""
Name: 'Radiosity (.radio)...'
Blender: 232
Group: 'Export'
Tooltip: 'Export selected mesh (with vertex colors) to Radiosity File Format (.radio)'
"""

__author__ = "Anthony D'Agostino (Scorpius)"
__url__ = ("blender", "elysiun",
"Author's homepage, http://www.redrival.com/scorpius")
__version__ = "Part of IOSuite 0.5"

__bpydoc__ = """\
This script exports meshes to Radiosity file format.

The Radiosity file format is my own personal format. I created it to
learn how meshes and vertex colors were stored. See IO-Examples.zip, the
example *.radio files on my web page.

Usage:<br>
      Select meshes to be exported and run this script from "File->Export" menu.

Notes:<br>
      Before exporting to .radio format, the mesh must have vertex colors.
Here's how to assign them:

1. Use radiosity!

2. Set up lights and materials, select a mesh, switch the drawing mode
to "textured," press the VKEY.

3. Press the VKEY and paint manually.

4. Use a custom script to calculate and apply simple diffuse shading and
specular highlights to the vertex colors.

5. The Videoscape format also allows vertex colors to be specified.
"""

# $Id: radiosity_export.py,v 1.6 2004/11/30 02:27:46 ianwill Exp $
#
# +---------------------------------------------------------+
# | Copyright (c) 2002 Anthony D'Agostino                   |
# | http://www.redrival.com/scorpius                        |
# | scorpius@netzero.com                                    |
# | April 11, 2002                                          |
# | Released under the Blender Artistic Licence (BAL)       |
# | Import Export Suite v0.5                                |
# +---------------------------------------------------------+
# | Read and write Radiosity File Format (*.radio)          |
# +---------------------------------------------------------+

import Blender, mod_meshtools
#import time

try:
      import struct
except:
      msg = "Error: you need a full Python install to run this script."
      mod_meshtools.print_boxed(msg)
      Blender.Draw.PupMenu("ERROR%t|"+msg)

# ================================
# ====== Write Radio Format ======
# ================================
def write(filename):
      #start = time.clock()
      file = open(filename, "wb")

      objects = Blender.Object.GetSelected()
      objname = objects[0].name
      meshname = objects[0].data.name
      mesh = Blender.NMesh.GetRaw(meshname)
      obj = Blender.Object.Get(objname)

      if not mod_meshtools.has_vertex_colors(mesh):
            message = "Please assign vertex colors before exporting. \n"
            message += objname + " object was not saved."
            mod_meshtools.print_boxed(message)
            Blender.Draw.PupMenu("ERROR%t|"+message)
            return

      # === Object Name ===
      file.write(struct.pack("<h", len(objname)))
      file.write(struct.pack("<"+`len(objname)`+"s", objname))

      # === Vertex List ===
      file.write(struct.pack("<l", len(mesh.verts)))
      for i in range(len(mesh.verts)):
            if not i%100 and mod_meshtools.show_progress:
                  Blender.Window.DrawProgressBar(float(i)/len(mesh.verts), "Writing Verts")

            x, y, z = mesh.verts[i].co
            file.write(struct.pack("<fff", x, y, z))

      # === Face List ===
      file.write(struct.pack("<l", len(mesh.faces)))
      for i in range(len(mesh.faces)):
            if not i%100 and mod_meshtools.show_progress:
                  Blender.Window.DrawProgressBar(float(i)/len(mesh.faces), "Writing Faces")

            file.write(struct.pack("<b", len(mesh.faces[i].v)))
            for j in range(len(mesh.faces[i].v)):
                  file.write(struct.pack("<h", mesh.faces[i].v[j].index))

            for j in range(4): # .col always has a length of 4
                  file.write(struct.pack("<BBBB", mesh.faces[i].col[j].r,
                                                                  mesh.faces[i].col[j].g,
                                                                  mesh.faces[i].col[j].b,
                                                                  mesh.faces[i].col[j].a))

      Blender.Window.DrawProgressBar(1.0, '')  # clear progressbar
      file.close()
      #end = time.clock()
      #seconds = " in %.2f %s" % (end-start, "seconds")
      message = "Successfully exported " + Blender.sys.basename(filename)# + seconds
      mod_meshtools.print_boxed(message)

def fs_callback(filename):
      if filename.find('.radio', -6) <= 0: filename += '.radio'
      write(filename)

Blender.Window.FileSelector(fs_callback, "Export Radio")

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