Procedure:
1) Laso select desired faces in edit mode - CTL+LMS drag (use vertex/edge/face selection as needed - buttons at the right end). First select roughly and unlselect (CTR+Shift+LMS drag) to refine the selection. Edge mode helps here.
2) Split by pressing 'p' (split P mesh/vertex/split)
3) Select the part in object mode (tab) and give object and data block name in Link and Materials window.
4) Select all and export as obj (Say export blender objects as OBJ groups using the buttons at the bottom)
Refs:
http://wiki.blender.org/index.php/Doc:Manual/Modeling/Objects/Groups_and_Parenting
http://wiki.blender.org/index.php/Doc:Manual/Modeling/Meshes/Selection
Thursday, January 6, 2011
Segment 3D model in blender to get a separate OBJ goup
Tuesday, November 30, 2010
Wednesday, April 7, 2010
Fast rendering 2D projections of 3D model data
The renderer performs a high speed rendering of a Autodesk 3DS model, using OpenGL offscreen rendering. The rendered image could be pixel intensities, surface normal values or other attributes.
Given a 3DS model like this:
For a given rotation, shift and scale, a 2D projection like this is rendered. Intensity values are returned/stored in memory for further processing.
Alternatively, other attributes like surface normal components could also be rendered instead of the color intensities.
For example x, y, z components of the model surface normals have been rendered in the 3 images below.
Given a 3DS model like this:
For a given rotation, shift and scale, a 2D projection like this is rendered. Intensity values are returned/stored in memory for further processing.
Alternatively, other attributes like surface normal components could also be rendered instead of the color intensities.
For example x, y, z components of the model surface normals have been rendered in the 3 images below.
Monday, March 22, 2010
Tuesday, March 16, 2010
shell script to rename all UPPERCASE files to lowercase
for f in *; do
g=`expr "xxx$f" : 'xxx\(.*\)' | tr '[A-Z]' '[a-z]'`
mv "$f" "$g"
done
g=`expr "xxx$f" : 'xxx\(.*\)' | tr '[A-Z]' '[a-z]'`
mv "$f" "$g"
done
Tuesday, March 9, 2010
Notes on compiling mex file without gcc version warning
http://www.mathworks.com/access/helpdesk_r13/help/techdoc/matlab_prog/ch7_pe30.html#784594
Changed mexopts.sh as (Matlab2009b/bim/mexopts.sh is changed use mex -setup to select that conf as the default after the changes)
glnx86)
#----------------------------------------------------------------------------
RPATH="-Wl,-rpath-link,$TMW_ROOT/bin/$Arch"
# StorageVersion: 1.0
# CkeyName: GNU C
# CkeyManufacturer: GNU
# CkeyLanguage: C
# CkeyVersion:
#CC='gcc'
CC='gcc-4.1'
#CFLAGS='-ansi -D_GNU_SOURCE'
#Srimal: we allow // style comments due to opencv .h files
CFLAGS='-D_GNU_SOURCE'
Changed mexopts.sh as (Matlab2009b/bim/mexopts.sh is changed use mex -setup to select that conf as the default after the changes)
glnx86)
#----------------------------------------------------------------------------
RPATH="-Wl,-rpath-link,$TMW_ROOT/bin/$Arch"
# StorageVersion: 1.0
# CkeyName: GNU C
# CkeyManufacturer: GNU
# CkeyLanguage: C
# CkeyVersion:
#CC='gcc'
CC='gcc-4.1'
#CFLAGS='-ansi -D_GNU_SOURCE'
#Srimal: we allow // style comments due to opencv .h files
CFLAGS='-D_GNU_SOURCE'
Friday, March 5, 2010
Run mex functions using opencv 2.0 code with MATLAB R2009b
We get this error:
??? Invalid MEX-file '/home/srimal/svnworking/renderer/mexLossC/mexLossC.mexglx':
/home/srimal/MatlabR2009b/bin/glnx86/../../sys/os/glnx86/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by
/usr/local/lib/libcvaux.so.4).
Solution:
~/MatlabR2009b/sys/os/glnx86
ln -s /usr/lib/libstdc++.so.6.0.13 ~/MatlabR2009b/sys/os/glnx86/libstdc++.so.6
??? Invalid MEX-file '/home/srimal/svnworking/renderer/mexLossC/mexLossC.mexglx':
/home/srimal/MatlabR2009b/bin/glnx86/../../sys/os/glnx86/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by
/usr/local/lib/libcvaux.so.4).
Solution:
~/MatlabR2009b/sys/os/glnx86
ln -s /usr/lib/libstdc++.so.6.0.13 ~/MatlabR2009b/sys/os/glnx86/libstdc++.so.6
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