An Extended Shadow Map for Shading with Linear
Light Sources
Yi-Jen
Huang
M.Sc. Project, April 1996
Abstract
Shadows are important visual cues. Shadow map represents
an efficient algorithm for computing shadows from point and directional
light sources. A shadow map keeps the directional distances of the closest
objects from the light source. Once it is computed by any rendering technique,
determining the visibility of the light from any point requires constant
time. This report proposes a new approach to construct a multiple-level
shadow map at each end-point of the linear light source. The multiple-level
structure of shadow maps reduces the traditional problem related to holes.
By combin- ing the information of two aligned shadow maps, a polygonal
shadow map is derived to determine the visible segments of the linear light.
The results are promising but more work is required to reduce the memory
requirements and imprecision due to the sampled information from the shadow
maps.
Online version
Available here in Postscript
format, or here in Adobe PDF
format.
BibTeX
@MastersThesis{Huang:1996:MSC,
author = "Yi-Jen Huang",
title = "An Extended Shadow Map for Shading with Linear Light Sources",
month = april,
year = 1996,
type = "M.Sc. Thesis",
school = "McGill University",
}