In this paper, on the top of page 7 it says,
Where $\delta$ is the maximum geometric error of a chunk ...
What does that mean? Thanks :D
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epimorphic
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It's mentioned even earlier, on page 6: "Each chunk has a bounding volume associated with it, as well as a maximum geometric error, $\delta$. $\delta$ represents the maximum geometric deviation of a chunk (in object space) from the portion of the underlying full-detail mesh it represents." Is that sufficient for you? – epimorphic Feb 03 '15 at 23:03
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Why should there be any deviation? – MadHacker Feb 05 '15 at 23:58
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Because the coarser meshes don't have the level of detail of the full-detail mesh. Think of trying to approximate a smooth curve with four line segments, or more relevantly here, approximating that five-line approximation with just two line segments. – epimorphic Feb 06 '15 at 15:50