75 |
\label{secrelated} |
\label{secrelated} |
76 |
|
|
77 |
|
|
78 |
\subsection{The texture mapping primitive} |
% \subsection{The texture mapping primitive} |
79 |
|
|
80 |
Texture mapping is a ubiquitous ... \cite{haeberli93texture} |
Texture mapping is a ubiquitous ... \cite{heckbert86survey,haeberli93texture} |
81 |
originally introduced introduced by Catmull\cite{catmull74}. |
originally introduced introduced by Catmull\cite{catmull74}. |
82 |
|
|
83 |
|
In off-line rendering, off |
84 |
|
|
85 |
- off-line rendering: EWA XXXREF |
- off-line rendering: EWA XXXREF |
86 |
|
|
107 |
} |
} |
108 |
\end{figure} |
\end{figure} |
109 |
|
|
110 |
\subsection{Mipmapping: bi- and trilinear filtering} |
% \subsection{Mipmapping: bi- and trilinear filtering} |
111 |
|
|
112 |
- Trilinear/bilinear (mipmap) filtering was designed to avoid temporal and spatial aliasing\cite{williams83pyramidal} |
- Trilinear/bilinear (mipmap) filtering was designed to avoid temporal and spatial aliasing\cite{williams83pyramidal} |
113 |
|
|
135 |
\end{figure} |
\end{figure} |
136 |
|
|
137 |
|
|
138 |
\subsection{Anisotropic texture filtering} |
% \subsection{Anisotropic texture filtering} |
139 |
|
|
140 |
- basic anisotropic solution: more samples from the mipmaps than the 8 used for |
- basic anisotropic solution: more samples from the mipmaps than the 8 used for |
141 |
trilinear - better approximation of EWA. Modern graphics cards support up to XXX samples |
trilinear - better approximation of EWA. Modern graphics cards support up to XXX samples |
173 |
c)\\ |
c)\\ |
174 |
\caption{ |
\caption{ |
175 |
\label{figaniso} |
\label{figaniso} |
176 |
Anisotropic filtering. |
Hardware anisotropic filtering. |
177 |
On the same card and same texture coordinates as |
On the same card and same texture coordinates as |
178 |
Fig.~\ref{figbitrilinear} c), but with anisotropic |
Fig.~\ref{figbitrilinear} c), but with anisotropic |
179 |
filtering enabled, the PFSS diagram shows a much better (smaller) |
filtering enabled, the PFSS diagram shows a much better (smaller) |