OBD:QTNA: Difference between revisions

OBD:QTNA (view source)

Revision as of 19:21, 13 March 2007

182 bytes added , 13 March 2007

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 | COLSPAN=3 | <FONT SIZE=2 COLOR="#FFFFFF">Below follows the first package.</FONT>
 |- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#FFC8C8" | 3A 09
+| BGCOLOR="#FFC8C8" | 3A 09 00 80
-| 2362
+| 2362, high bit
-| ALIGN=LEFT | unknown
+| ALIGN=LEFT | negative u, negative v child index
 |- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#FFC8C8" | 00 80
+| BGCOLOR="#FFFFC8" | 3B 09 00 80
-| 32768
+| 2363, high bit
-| ALIGN=LEFT | unknown
+| ALIGN=LEFT | positive u, negative v child index
 |- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#FFFFC8" | 3B 09
+| BGCOLOR="#C8FFC8" | 01 00 00 00
-| 2363
-| ALIGN=LEFT | unknown
-|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#FFFFC8" | 00 80
-| 32768
-| ALIGN=LEFT | unknown
-|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#C8FFC8" | 01 00
 | 1
-| ALIGN=LEFT | unknown
+| ALIGN=LEFT | negative u, positive v child index
 |- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#C8FFC8" | 00 00
+| BGCOLOR="#C8FFFF" | 54 09 00 80
-| 0
+| 2388, high bit
-| ALIGN=LEFT | unknown
+| ALIGN=LEFT | positive u, positive v child index
-|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#C8FFFF" | 54 09
-| 2388
-| ALIGN=LEFT | unknown
-|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
-| BGCOLOR="#C8FFFF" | 00 80
-| 32768
-| ALIGN=LEFT | unknown
 |}
+;Child index
+:If the high bit is not set then the child index is the index of another quadtree node (into the same array). Otherwise it is the index of an [[OBD:OTLF|OTLF]] entry.
+;U and V meaning
+:X aligned node - U = Y, V = Z
+:Y aligned node - U = X, V = Z
+:Z aligned node -  U = X, V = Y
+:;Note
+::The alignment of a node depends on the leaf face that referenced it because there is no orientation information in a quadttree node.
 <HR>
 <CENTER>[[OBD:PSUI|<==]] <B>QTNA File</B> [[OBD:SNDD|==>]]</CENTER>