Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Ray casting occurs in a virtual multiresolution volume, in which a hierarchy of page tables represents each resolution. Ray casting accesses the actual volume data by performing on-the-fly address translation to access blocks in virtual memory. If a data block is missing, the ray caster generates a request for that block and propagates the request to the visualization-driven volume construction.
