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3VO - the new viewer for Slicer Dicer

The new viewer for Slicer Dicer, 3VO, is a major improvement provided by Slicer Dicer v5.  Click on either of the links below to view a simple flash tutorial that provides a brief description of 3VO.

Low Resolution (600 pixels across)

High Resolution (900 pixels across)

Here are some of the features available in the 3VO window:

Realistic 3D projection - precise control over camera field-of-view and
Interactive zoom - drag the cursor to increase or decrease the scale.
Virtual-trackball interactive rotation - drag the cursor to rotate and/or
spin the scene.
Multiple lights - ambient plus any number of directional lights.
Realistic surface light-reflection model - adjust diffuse and specular
reflection coefficients for individual surfaces.
Surface representation options - points, wireframe, or solid.
Translucent surfaces - set opacity for any surface from 0% to 100%.
Export 3D model data to a file - 3ds, cob, dxf, pov, and other formats
are supported.

The last feature in this list, 3D model data export, is distinct from the others in that it is unrelated to interactive viewing. You can use this feature to export your scene to a file in any of several standard formats that are used in the 3D modeling industry. This makes it possible to extract 3D objects from your data set and merge them into other modeling environments. For example, the exported model-data file could be read by a stereolithography machine, or other rapid prototyping device, to produce a physical replica of a structure of interest extracted from your data.

NetCDF Large File Support

NetCDF "Large File Support" (LFS) is now included in Slicer Dicer. Previous versions were linked to v3.4 of the netCDF libraries from Unidata (UCAR). This version is linked with netCDF v3.6, which adds LFS.

The following is quoted from the FAQ entitled "What is Large File Support?" on the Unidata web site (http://my.unidata.ucar.edu):

"Large File Support (LFS) refers to operating system and C library facilities to support files larger than 2 GiB. On many 32-bit platforms the default size of a file offset is still a 4-byte signed integer, which limits the maximum size of a file to 2 GiB. Using LFS interfaces and the 64-bit file offset type, the maximum size of a file may be as large as 2**63 bytes, or 8 EiB. For many current platforms, large file macros or appropriate compiler flags have to be set to build a library with support for large files. This is handled automatically in netCDF 3.6."

NetCDF datasets with LFS can be created on 32-bit Windows platforms (using netCDF v3.6). Now, both LFS and, older, non-LFS netCDF files can be successfully opened.



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