Function PlantTreesOnTile

src/tree_cmd.cpp:84–117

* Creates a tree tile * Ground type and density is preserved. * * @pre the tile must be suitable for trees. * * @param tile where to plant the trees. * @param treetype The type of the tree * @param count the number of trees (minus 1) * @param growth the growth status */

 * @param growth the growth status
 */
static void PlantTreesOnTile(TileIndex tile, TreeType treetype, uint count, TreeGrowthStage growth)
{
	assert(treetype != TREE_INVALID);
	assert(CanPlantTreesOnTile(tile, true));

	TreeGround ground;
	uint density = 3;

	switch (GetTileType(tile)) {
		case MP_WATER:
			ground = TREE_GROUND_SHORE;
			ClearNeighbourNonFloodingStates(tile);
			break;

		case MP_CLEAR: {
			ClearGround clearground = GetClearGround(tile);
			if (IsSnowTile(tile)) {
				ground = clearground == CLEAR_ROUGH ? TREE_GROUND_ROUGH_SNOW : TREE_GROUND_SNOW_DESERT;
			} else {
				switch (clearground) {
					case CLEAR_GRASS:  ground = TREE_GROUND_GRASS;       break;
					case CLEAR_ROUGH:  ground = TREE_GROUND_ROUGH;       break;
					default:           ground = TREE_GROUND_SNOW_DESERT; break;
				}
			}
			if (clearground != CLEAR_ROUGH) density = GetClearDensity(tile);
			break;
		}

		default: NOT_REACHED();
	}

	MakeTree(tile, treetype, count, growth, ground, density);
}

/**
 * Get a random TreeType for the given tile based on a given seed