@article{Herbison:1980:HMH,
number = {24},
optnote = {},
author = {Don HerbisonEvans},
optkey = {},
optannote = {},
localfile = {papers/Herbison.1980.HMH.pdf},
optkeywords = {Algorithmic Aspects hidden line/surface removal},
optmonth = {},
doi = {http://dx.doi.org/10.1016/00978493(80)900102},
journal = jCAG,
volume = {5},
optstatus = {url abstract},
abstract = {The procedures described here apply to a process which is
formulated as a function of a continuous scalar parameter over a
finite range. The problem considered is how to generate the
function with the parameter being incremented in a series of
discrete steps, when a series of subranges of parameter values are
to be omitted. The application described is the function of
drawing of ellipsoid outlines when parts of the outlines are
obscured by other ellipsoids. The scalar parameter is an auxiliary
angle running around the outline from to 2 PI, Greek which is
incremented in finite steps generating a series of points around
the outline. These are connected by chords giving a polygonal
approximation to the outline. It is shown that it is desirable to
do the drawing using an ordered consolidated list of parameter
values at the starts and ends of the hidden arcs. Algorithms for
generating and using this list are presented and discussed.
Generalisations of the procedures are discussed. },
title = {{H}ow to {M}erge {H}idden {A}rcs and {T}hen {N}ot {D}raw {T}hem},
year = {1980},
pages = {7981},
}
