/** Convert to or from snowy tiles. */
static void TileLoopClearAlps(TileIndex tile)
{
int k = GetTileZ(tile) - GetSnowLine() + 1;
if (k < 0) {
/* Below the snow line, do nothing if no snow. */
if (!IsSnowTile(tile)) return;
} else {
/* At or above the snow line, make snow tile if needed. */
if (!IsSnowTile(tile)) {
MakeSnow(tile);
MarkTileDirtyByTile(tile);
return;
}
}
/* Update snow density. */
uint current_density = GetClearDensity(tile);
uint req_density = (k < 0) ? 0u : min((uint)k, 3);
if (current_density < req_density) {
AddClearDensity(tile, 1);
} else if (current_density > req_density) {
AddClearDensity(tile, -1);
} else {
/* Density at the required level. */
if (k >= 0) return;
ClearSnow(tile);
}
MarkTileDirtyByTile(tile);
}
static void TileLoopTreesAlps(TileIndex tile)
{
int k = GetTileZ(tile) - GetSnowLine() + TILE_HEIGHT;
if (k < 0) {
switch (GetTreeGround(tile)) {
case TREE_GROUND_SNOW_DESERT: SetTreeGroundDensity(tile, TREE_GROUND_GRASS, 3); break;
case TREE_GROUND_ROUGH_SNOW: SetTreeGroundDensity(tile, TREE_GROUND_ROUGH, 3); break;
default: return;
}
} else {
uint density = min((uint)k / TILE_HEIGHT, 3);
if (GetTreeGround(tile) != TREE_GROUND_SNOW_DESERT && GetTreeGround(tile) != TREE_GROUND_ROUGH_SNOW) {
TreeGround tg = GetTreeGround(tile) == TREE_GROUND_ROUGH ? TREE_GROUND_ROUGH_SNOW : TREE_GROUND_SNOW_DESERT;
SetTreeGroundDensity(tile, tg, density);
} else if (GetTreeDensity(tile) != density) {
SetTreeGroundDensity(tile, GetTreeGround(tile), density);
} else {
if (GetTreeDensity(tile) == 3) {
uint32 r = Random();
if (Chance16I(1, 200, r)) {
SndPlayTileFx((r & 0x80000000) ? SND_39_HEAVY_WIND : SND_34_WIND, tile);
}
}
return;
}
}
MarkTileDirtyByTile(tile);
}
/**
* Place some trees randomly
*
* This function just place some trees randomly on the map.
*/
void PlaceTreesRandomly()
{
uint i, j, ht;
i = ScaleByMapSize(DEFAULT_TREE_STEPS);
if (_game_mode == GM_EDITOR) i /= EDITOR_TREE_DIV;
do {
uint32 r = Random();
TileIndex tile = RandomTileSeed(r);
IncreaseGeneratingWorldProgress(GWP_TREE);
if (CanPlantTreesOnTile(tile, true)) {
PlaceTree(tile, r);
if (_settings_game.game_creation.tree_placer != TP_IMPROVED) continue;
/* Place a number of trees based on the tile height.
* This gives a cool effect of multiple trees close together.
* It is almost real life ;) */
ht = GetTileZ(tile);
/* The higher we get, the more trees we plant */
j = GetTileZ(tile) / TILE_HEIGHT * 2;
/* Above snowline more trees! */
if (_settings_game.game_creation.landscape == LT_ARCTIC && ht > GetSnowLine()) j *= 3;
while (j--) {
PlaceTreeAtSameHeight(tile, ht);
}
}
} while (--i);
/* place extra trees at rainforest area */
if (_settings_game.game_creation.landscape == LT_TROPIC) {
i = ScaleByMapSize(DEFAULT_RAINFOREST_TREE_STEPS);
if (_game_mode == GM_EDITOR) i /= EDITOR_TREE_DIV;
do {
uint32 r = Random();
TileIndex tile = RandomTileSeed(r);
IncreaseGeneratingWorldProgress(GWP_TREE);
if (GetTropicZone(tile) == TROPICZONE_RAINFOREST && CanPlantTreesOnTile(tile, false)) {
PlaceTree(tile, r);
}
} while (--i);
}
}
/* static */ uint32 ScriptTown::GetCargoGoal(TownID town_id, ScriptCargo::TownEffect towneffect_id)
{
if (!IsValidTown(town_id)) return -1;
if (!ScriptCargo::IsValidTownEffect(towneffect_id)) return -1;
const Town *t = ::Town::Get(town_id);
switch (t->goal[towneffect_id]) {
case TOWN_GROWTH_WINTER:
if (TileHeight(t->xy) >= GetSnowLine() && t->cache.population > 90) return 1;
return 0;
case TOWN_GROWTH_DESERT:
if (GetTropicZone(t->xy) == TROPICZONE_DESERT && t->cache.population > 60) return 1;
return 0;
default: return t->goal[towneffect_id];
}
}
