Does anybody know how the GetNearestWater function work?

[Peter Triggs]

Ahh, now I remember:

int_f CTC_IsSeaTerrain(location_t theLoc){

    location_t tmpLoc;
    tmpLoc=theLoc;
    if ((9 < TerrainType(tmpLoc) && TerrainType(tmpLoc) < 17) 
|| TerrainType(tmpLoc)==22 || TerrainType(tmpLoc) ==23 ){
         return 1;
    }
    return 0;

}

[Martin Gühmann]

Originally posted by J Bytheway
Yep, there was, and it was called TerrainType. e.g. I used

if (TerrainType(city.location) == 13)

to test for space cities. I doubt that you could have missed that if it still existed, though.

Well here is my MG_IsLand function:

int_f MG_IsLand(location_t theLoc){
location_t MGLoc;
MGLoc = theloc;
	return((TerrainType(MGLoc)<=9)
	||((TerrainType(MGLoc)>=18)
	&& (TerrainType(MGLoc)<=21))
	);
}

As you can see I use the TerrainType as well. But that was not that I was looking for. For instance if I change the order of the terrains in the terrain.txt this function above wouldn't work.

Originally posted by J Bytheway
There was also an IsUnderseaCity(city) function, which might be useful if it still exists, and an IsSpaceCity - but that one didn't work - hence the above workaround.

There is also a IsUnderSeaCity function and I think also a IsSpaceCity function. Well I haven't tested it. But I doubt that the IsUnderSeaCity function works, because whenever undersea tunnels are under a city the terrain is considered as land tile and therefore also the undersea cities, that's the cause of the sea city sprite bug. Well in that case even a build in IsLand function wouldn't work.

-Martin

[J Bytheway]

Hmm... I see the problem.

Perhaps you should try GetNearestWater on a sea city tile and see whether it returns 1 or 0 - If it is being treated as land as you say then it might return 1 and then you can indeed test whether there is any water on the map by using GetNearestWater on the capital city.

[Immortal Wombat]

You can in place of numbers use the DB-references in that function:

if(TerrainType(tmpLoc) == TerrainDB(TERRAIN_PLAINS)){

For instance. Although in fact the converse would be better, checking it's not a sea terrain rather than is a land terrain, because land terrains are more likely to be added as dummys in scenarios, and AFAIK nobody has ever published anything with an added sea terrain.

[Martin Gühmann]

Looks like GetNearestWater scans the whole map for water tiles and returns finally the shortest distance.

-Martin