PR-3-dkm - ,Paperreview,Spring2000 Reviewby:DanMcAnarney...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CIS736 Computer Graphics, Paper review, Spring 2000 Review by: Dan McAnarney  Paper: "Hierarchical Visibility Culling for Spline Models," by Subodh  Kumar and Dinesh Manocha This paper describes an extension of the back-face culling technique  used for polygons to back-patch culling for splined surfaces.  It also  introduces a data structure named an O N E tree to complement the back- patch culling with the more familiar technique of view-frustum culling. The basic idea behind back-patch culling is to create an array of  normals for the spline surface – a Gauss map.  This map of normals is  then compared the eye point view direction to get a determination of  whether or not the patch is back facing.   This is a good idea,  especially since this normal field is not calculated inside of the  viewing pipeline, but has been pre-calculated for the model.  This (by  the authors’ tests) significantly reduces the number individual  polygons in the pipeline, and speeds display.   By using this 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

PR-3-dkm - ,Paperreview,Spring2000 Reviewby:DanMcAnarney...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online