On 12/04/2012 23:31, Andrea Peri wrote:
>Thats why I said to remove just the primitives which depend on the
>geometry deleted (and not from any other one). This way one can clean
>the primitives which are not shared by any other geometry. Its like the
>garbage collector Sandro said before.
>After that one can insert again the whole modified geometry.
>Dont know if I could explain myself.
Sorry, but I'm not sure to understand
So I try to do an example.
Suppose to have this topology and every topogeometry is coincident
with a single face
+----e1-------+----e2-------+----e3-------+
| | | |
| | | |
| F1 | F2 | F3 |
e13 e14 e15 e16
| | | |
| | | |
+-----e4------+----e5-------+-----e6------+
| | | |
| | | |
| F4 | F5 | F6 |
e17 e18 e19 e20
| | | |
| | | |
+-----e7------+-----e8------+-----e9------+
| | | |
| | | |
| F9 | F8 | F7 |
e21 e22 e23 e24
| | | |
| | | |
+-----e10-----+-----e11-----+-----e12-----+
topogeometry T1 = face F1
T2 = F2
and so on..
If I suppose to whan remove the edge e19.
That edge I plan to remove is boundary between the F5 and F6 and so
the edge e19 is boundary on
Topogeometry T5 and topogeometry T6.
You suppose to remove temporary the topogeometry T5 and T6 right ?
After this use the ST_RemEdgeModFace to remove the edge "e19" and
after this reapply the two topogeometry
T5 and T6 using the totopogeo ?
I fear that the totopogeom will re.create the edge e19 calling it "e25" :(
If some edge change the id this is no problem and then you can insert a
T5 or T6 topogeometries with totopogeom that are different from the
original ones and totopogeom will recreate the primitives. Then the user
does not have to know about primitive commands as: ST_RemEdgeModFAce, etc.
Dont take my opinion if a so serious way because Im just starting with
persistent topology though.
--
-----------------
Andrea Peri
. . . . . . . . .
qwerty àèìòù
-----------------
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