Focal Stacks

From Immersive Visualization Lab Wiki
Jump to: navigation, search

OBJ Files

Requirements for OBJ files for CalVR to display:

  • Material library file needs to be specified with extension, e.g.: mtllib coral-mtl.mtl.
  • To use a texture image (image map) use the command usemtl, not usemap. Example: usemtl coral-material. This is for material file coral-mtl.mtl, which has the following content:
  newmtl coral-material
  map_Kd coral-map.jpg
  • The image referenced by the material file in this example is coral-map.jpg.
  • If the image is upside down, flip it with the following ImageMagick command:
  convert sourceimage.jpg -flip destimage.jpg
  • Here's a script that converts Helicon Focus's OBJ files to CalVR's OBJ format:
# Syntax:  <scriptname> <obj_file_name.obj>
# Example: FS_010.obj
chmod 660 *
sed s/usemap/usemtl/ $1 -i
sed s/map.jpg/coral-material/ $1 -i
sed '/map_Kd/ i\newmtl coral-material' $1.mtl -i
convert $1.jpg -flip $1.jpg
  • To run the script on all OBJ files in a time series:
    • Put the above script ( in the directory just above the directories for the time series and call the following shell script:
find . -type d -exec sh -c 'cd {} && echo `../ *.obj`' ';'