Added research data, testing blender mesh generation

src_research_readme/blender_2.43_scripts/bpymodules/blend2renderinfo.py

@@ -0,0 +1,95 @@
+#!/usr/bin/python
+
+# --------------------------------------------------------------------------
+# ***** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+# ***** END GPL LICENCE BLOCK *****
+# --------------------------------------------------------------------------
+
+import struct
+
+# In Blender, selecting scenes in the databrowser (shift+f4) will tag for rendering.
+
+# This struct wont change according to ton.
+# Note that the size differs on 32/64bit
+'''
+typedef struct BHead {
+	int code, len;
+	void *old;
+	int SDNAnr, nr;
+} BHead;
+'''
+
+
+def read_blend_rend_chunk(path):
+	file = open(path, 'rb')
+	
+	if file.read(len('BLENDER')) != 'BLENDER':
+		return []
+	
+	# 
+	if file.read(1) == '-':
+		is64bit = True
+	else: # '_'
+		is64bit = False
+
+	if file.read(1) == 'V':
+		isBigEndian = True # ppc
+	else: # 'V'
+		isBigEndian = False # x86
+	
+	
+	# Now read the bhead chunk!!!
+	file.read(3) # skip the version
+	
+	scenes = []
+	
+	while file.read(4) == 'REND':
+	
+		if is64bit:		sizeof_bhead = sizeof_bhead_left = 24 # 64bit
+		else:			sizeof_bhead = sizeof_bhead_left = 20 # 32bit
+	
+		sizeof_bhead_left -= 4
+		
+		if isBigEndian:	rend_length = struct.unpack('>i', file.read(4))[0]
+		else:			rend_length = struct.unpack('<i', file.read(4))[0]
+		
+		sizeof_bhead_left -= 4
+		
+		# We dont care about the rest of the bhead struct
+		file.read(sizeof_bhead_left)
+		
+		# Now we want the scene name, start and end frame. this is 32bites long
+		
+		if isBigEndian:	start_frame, end_frame = struct.unpack('>2i', file.read(8))
+		else:			start_frame, end_frame = struct.unpack('<2i', file.read(8))
+		
+		scene_name = file.read(24)
+		scene_name = scene_name[ : scene_name.index('\0') ]
+		
+		scenes.append( (start_frame, end_frame, scene_name) )
+	return scenes
+
+def main():
+	import sys
+	for arg in sys.argv[1:]:
+		if arg.lower().endswith('.blend'):
+			print read_blend_rend_chunk(arg)
+
+if __name__ == '__main__':
+	main()
+