[GRASS5] G3D-api problem

[Alfonso Vitti]

Hi Markus, Nico

I didn't answer the mail on the mailinglist because I don't 
know/remember very much about tiles

but I've given a quick look to the libs and I hope what follows can help 
a bit.
(i've been a bit lazy, sorry! ;-)

the error:
"FATAL ERROR: G3d_writeTile: tileIndex out of range"
comes from
"tilewrite.c"
when
"if ((tileIndex >= map->nTiles) || (tileIndex < 0))"

in:
"g3ddefaults.c"
there are:
"#define G3D_TILE_X_DEFAULT 8"
"g3d_tile_dimension[0] = G3D_TILE_X_DEFAULT;"
"*tileX = g3d_tile_dimension[0];"

tileX is used in:
"header.c"
"map->tileX = tileX;"
"map->nx = (map->region.cols - 1) / tileX + 1;"
the same for y and z
"map->nxy = map->nx * map->ny"
"map->nTiles = map->nxy * map->nz;"

so it seems that the value of "map->nTiles" (which governs the fatal 
error) depends on the number of cols in the region and on the value of 
"tileX" which is set to 8 by default

hope this will be useful

Alfonso






Markus Neteler wrote:
> Ciao Alfonso,
> 
> do you have a few hints for Nico? Something for him to
> start looking for the bug?
> 
> Thanks,
> 
>  Markus
> 
> From: "N.J. Hardebol" <harj at geo.vu.nl>
> To: <grass5 at grass.itc.it>
> 
> On Tue, Sep 16, 2003 at 01:39:53PM +0200, N.J. Hardebol wrote:
> 
>>Dear grass programmers,
>>
>>Although not sure if this is the place for asking questions on the grass
>>api, not part of grass development..
>>I've asked the same question two weeks ago, and have not solved it yet..
>>Using the function G3d_writeTile (g3d_map, TileIndex, data, G3D_DOUBLE) to
>>write to a 3D grid I run into problems.
>>The program output offers:
>>FATAL ERROR: G3d_writeTile: tileIndex out of range. For a tileIndex of 3200.
>>The tileIndex is set with G3d_setTileDimension (128, 64, 201); since the
>>dimensions should be 128x64x201.
>>But somehow TileIndex = G3d_tile2tileIndex (g3d_map, ix, iy, iz) is not
>>allowed to supersede 3200 (16x8x25). For some unclear reason these
>>dimensions are set for the Tile. G3d_getNofTilesMap (g3d_map, &na, &nb, &nc)
>>offers 16 8 25.
>>Can anybody bring me a little further? How do I set the tileDimensions
>>properly so that I can have a tileIndex upto 128x64x201
>>
>>With kindest regards,
>>
>>Nico
>>
> 
> 
>