/****************************************************************************
Set the given terrain at the specified tile.
****************************************************************************/
void tile_set_terrain(struct tile *ptile, struct terrain *pterrain)
{
/* The terrain change is valid if one of the following is TRUE:
* - pterrain is NULL (= unknown terrain)
* - ptile is a virtual tile
* - pterrain does not has the flag TER_NO_CITIES
* - there is no city on ptile.
* This should be read as: The terrain change is INVALID if a terrain with
* the flag TER_NO_CITIES is given for a real tile with a city (i.e. all
* check evaluate to TRUE). */
fc_assert_msg(NULL == pterrain
|| tile_virtual_check(ptile)
|| !terrain_has_flag(pterrain, TER_NO_CITIES)
|| NULL == tile_city(ptile),
"At (%d, %d), the terrain \"%s\" (nb %d) doesn't "
"support cities, whereas \"%s\" (nb %d) is built there.",
TILE_XY(ptile), terrain_rule_name(pterrain),
terrain_number(pterrain), city_name(tile_city(ptile)),
tile_city(ptile)->id);
ptile->terrain = pterrain;
if (NULL != pterrain
&& NULL != ptile->resource
&& terrain_has_resource(pterrain, ptile->resource)) {
ptile->resource_valid = TRUE;
} else {
ptile->resource_valid = FALSE;
}
}
/****************************************************************************
Set the given terrain at the specified tile.
****************************************************************************/
void tile_set_terrain(struct tile *ptile, struct terrain *pterrain)
{
ptile->terrain = pterrain;
if (NULL != pterrain
&& NULL != ptile->resource
&& terrain_has_resource(pterrain, ptile->resource)) {
/* cannot use set_special() for internal values */
BV_SET(ptile->special, S_RESOURCE_VALID);
} else {
BV_CLR(ptile->special, S_RESOURCE_VALID);
}
}
