thesis/thesis.tex: Elaborating on interpolation of moving sources. Adding subsubsection about network enabled head tracking.

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@@ -2080,10 +2080,39 @@ ssr-aap -N “server” -C “127.0.0.1:50002”
 
       \subsubsection{Interpolation of moving sources}
         \label{subsubsec:interpolation_of_moving_sources}
+        Using the \gls{ip} or \gls{osc} interface, it is possible to move
+        sources in a scene to a new location. Unlike sWONDER
+        (see~\ref{subsec:swonder}), the \gls{ssr} is not able to interpolate
+        movement. When a new location for a source is requested, the movement
+        is carried out instantly, whereas sWONDER is able to move a source (on
+        a straight line) from one position to the next in a given time frame.\\
+        A series of movements can be requested in any desired time frame, which
+        means, that spatial aliasing is very likely to occur, during sets of
+        requests with a short time span between them.\\
+        To work around this, the \gls{ssr} should implement a comparable
+        feature to the one sWONDER facilitates and apply rate limiting on the
+        source positioning request, depending on a dynamically settable
+        threshold value in milliseconds.\\
+        Applications, such as WFSCollider (see~\ref{subsec:wfscollider}) or 3Dj
+        (see~\ref{subsec:3dj_supercollider_quark}) rely on their \gls{gui} or
+        rather \gls{sclang} to implement dynamic movements (e.g.\ circular or
+        randomized) \citep[pp. 56-62]{manual:wfscollider}. While the creative
+        process of source paths generation is clearly best placed in a visually
+        interactive process, its communication with the rendering engine has to
+        be high-performance and if scalable to large setups, ideally with low
+        network throughput.\\
+        Therefore it has to be evaluated, if implementing a set of understood
+        geometrical shapes, instead of sending a high frequency of source
+        positioning messages could be a more feasible solution in the case of
+        the \gls{ssr}. In~\ref{subsubsec:dynamic_scene} a wider approach to
+        this problem is discussed.
 
       \subsubsection{Dynamic scene}
         \label{subsubsec:dynamic_scene}
 
+      \subsubsection{Network enabled head tracking}
+        \label{subsubsec:network_enabled_headtracking}
+
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