Free-form solid modeling using deformations
Author
Güdükbay, Uğur
Advisor
Özgüç, Bülent
Date
1989Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
One of the most important problems of available solid modeling systems
is that the range of shapes generated is limited. It is not easy to model objects
with free-form surfaces in a conventional solid modeling system. Such
objects can be defined arl^itrarily but then operations on them are not transparent
and complications occur. A method for achieving free-form effect is
to define regular objects or surfaces, then deform them. This keeps various
properties of the model intact while achieving the required visuaJ appearance.
This thesis explains a number of geometric modeling techniques with
deformations applied to them in attempts to combine various approaches developed
so far. Regular deformations, which include twisting, bending, and
tapering, and free-form deformation technique are combined as a new deformation
method. This eliminates some of the disadvantages peculiar to each
method and utilizes the advantages of both.
Keywords
Deformationsgeometric modeling of solids
free-form surfaces,
user interface design
shading
hidden surface elimination
computer graphics