[Gzz-commits] manuscripts/AniFont anifont.tex

[Janne V. Kujala]

CVSROOT:        /cvsroot/gzz
Module name:    manuscripts
Branch:         
Changes by:     Janne V. Kujala <address@hidden>        03/10/31 12:54:55

Modified files:
        AniFont        : anifont.tex 

Log message:
        bullet points

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/manuscripts/AniFont/anifont.tex.diff?tr1=1.26&tr2=1.27&r1=text&r2=text

Patches:
Index: manuscripts/AniFont/anifont.tex
diff -u manuscripts/AniFont/anifont.tex:1.26 
manuscripts/AniFont/anifont.tex:1.27
--- manuscripts/AniFont/anifont.tex:1.26        Fri Oct 31 11:55:53 2003
+++ manuscripts/AniFont/anifont.tex     Fri Oct 31 12:54:54 2003
@@ -248,14 +248,28 @@
 are different, and it happens to be that \emph{in screen space}, anisotropic 
filtering
 of an anisotropic texture is always better than the isotropic filtering of
 an isotropic texture. This is shown in detail in 
Fig.~\ref{figstretchsquishwhyworks}.
-The trilinear filter footpring size depends strongly on subpixel position and 
+The trilinear filter footprint size depends strongly on subpixel position and 
 can be quite large compared to the actual pixel, causing blurring.
 When using the anisotropic filter, the footprint remains significantly smaller
 in one direction regardless of subpixel shifting --- in the other direction,
 it is similar.
 
-- analogous to supersampling
+- too large footprint --> blurry
+
+- too small footprint --> aliasing 
+
+- aliasing worse than blurring 
+  --> footprint made too large rather than too small (mipmap levels)
+
+- when texels are narrower in one direction, the granularity of the
+  pixel footprint will be smaller in that direction
 
+- thus, the footprint can better match the pixel in that direction
+
+- however, a larger number of narrow texels is needed to fill the
+  area of the pixel
+
+- analogous to supersampling
 
 - downsides: 
 
@@ -278,7 +292,6 @@
 % Hard to assess quality if zoomed too much (if the pixels are clearly
 % visible, the grid structure will obscure the actual image).
 % Is this fig referred to?
-
 }
 \end{figure*}