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Title: Illuminating the shadow mesh.


No abstract prepared.

Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
OSTI Identifier:
Report Number(s):
TRN: US200722%%754
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Cray User Group 2007 held May 7-10, 2007 in Seattle, WA.
Country of Publication:
United States

Citation Formats

Hunt, Warren H., and Goldman, Jon. Illuminating the shadow mesh.. United States: N. p., 2007. Web.
Hunt, Warren H., & Goldman, Jon. Illuminating the shadow mesh.. United States.
Hunt, Warren H., and Goldman, Jon. Tue . "Illuminating the shadow mesh.". United States. doi:.
title = {Illuminating the shadow mesh.},
author = {Hunt, Warren H. and Goldman, Jon},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}

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  • No abstract prepared.
  • The Shadow Mask Sweep (SMS) family of algorithms is a new image synthesis technique for generating shadows. The SMS technique is based on the painter's algorithm for visible surface determination. The antialiased version of the painter's algorithm is based on antialiased digital raster compositing techniques. These compositing techniques have previously assumed that the edges of the objects represented in the rasters were uncorrelated. This causes problems compositing objects modeled with primitives with correlated edges. These objects are common in image synthesis, such as meshes of polygons. It was desired to produce a shadow algorithm that could handle both primitives withmore » correlated and uncorrelated edges in the same image. To do this it was necessary to develop new compositing techniques. A new technique for correlated edges is combined with an extension of the existing uncorrelated edge technique producing a system that can use both. The painter's algorithm is extended to correct operation with both types of primitives using these new compositing techniques. Applying the painter's algorithm simultaneously to both visible surface and shadow determination yields the SMS technique. Algorithms based on the SMS technique are suitable for all opaque ''sharp edged'' primitives than can be rendered with the painter's algorithm and all opaque or transparent ''fuzzy'' primitives that can be rendered with the painter's algorithm. Primitives and combinations of primitives which previously had no efficient, general shadow algorithms, such as particle systems and nonuniform density translucent volumes can now be rendered efficiently using the SMS technique.« less
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