Ankara : The Department of Computer Engineering and the Graduate School of Engineering and Science of Bilkent University, 2012.Thesis (Master's) -- Bilkent University, 2012.Includes bibliographical references leaves 154-158.Terrain rendering is a crucial part of many real-time computer graphics applications
such as video games and visual simulations. It provides the main frame-ofreference
for the observer and constitutes the basis of an imaginary or simulated
world that encases the observer. Storing and rendering terrain models in real-time
applications usually require a specialized approach due to the sheer magnitude
of data available and the level of detail demanded. The easiest way to process
and visualize such large amounts of data in real-time is to constrain the terrain
model in several ways. This process of regularization decreases the amount of
data to be processed and also the amount of processing power needed at the cost
of expressivity and the ability to create interesting terrains.
The most popular terrain representation, by far, used by modern real-time
graphics applications is a regular 2D grid where the vertices are displaced in a
third dimension by a displacement map, conventionally called a height map. It
is the simplest and fastest possible terrain representation, but it is not possible
to represent complex terrain models that include interesting terrain features such
as caves, overhangs, cliffs and arches using a simple 2D grid and a height map.
We propose a novel terrain representation combining the voxel and height map
approaches that is expressive enough to allow creating complex terrains with
caves, overhangs, cliffs and arches, and efficient enough to allow terrain editing,
deformations and rendering in real-time. We also explore how to apply lighting,
texturing, shadowing and level-of-detail to the proposed terrain representation.Koca, ÇetinM.S
