https://imgur.com/wQuDOi5

static bool GrowingOnWateredTile(TileIndex tile)
{
	TrackBits water_track = TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
	if (water_track != TRACK_BIT_NONE) {
		if (water_track == TRACK_BIT_UPPER || water_track == TRACK_BIT_LOWER || water_track == TRACK_BIT_LEFT || water_track == TRACK_BIT_RIGHT) {
			if (water_track == TRACK_BIT_UPPER) {
				TileIndex opposite_tile = TileAddWrap(tile, -1, -1);
				TrackBits opposite_track = TRACK_BIT_LOWER;

				TileIndex next_tile_1 = TileAddWrap(tile, -1, 0);
				TrackBits next_track_1 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_Y | TRACK_BIT_UPPER : TRACK_BIT_3WAY_NW;

				TileIndex next_tile_2 = TileAddWrap(tile, 0, -1);
				TrackBits next_track_2 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_X | TRACK_BIT_UPPER : TRACK_BIT_3WAY_NE;
			} else if (water_track == TRACK_BIT_LOWER) {
				TileIndex opposite_tile = TileAddWrap(tile, 1, 1);
				TrackBits opposite_track = TRACK_BIT_UPPER;

				TileIndex next_tile_1 = TileAddWrap(tile, 1, 0);
				TrackBits next_track_1 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_Y | TRACK_BIT_LOWER : TRACK_BIT_3WAY_SE;

				TileIndex next_tile_2 = TileAddWrap(tile, 0, 1);
				TrackBits next_track_2 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_X | TRACK_BIT_LOWER : TRACK_BIT_3WAY_SW;
			} else if (water_track == TRACK_BIT_LEFT) {
				TileIndex opposite_tile = TileAddWrap(tile, 1, -1);
				TrackBits opposite_track = TRACK_BIT_RIGHT;

				TileIndex next_tile_1 = TileAddWrap(tile, 0, -1);
				TrackBits next_track_1 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_X | TRACK_BIT_LEFT : TRACK_BIT_3WAY_SW;

				TileIndex next_tile_2 = TileAddWrap(tile, 1, 0);
				TrackBits next_track_2 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_Y | TRACK_BIT_LEFT : TRACK_BIT_3WAY_NW;
			} else if (water_track == TRACK_BIT_RIGHT) {
				TileIndex opposite_tile = TileAddWrap(tile, -1, 1);
				TrackBits opposite_track = TRACK_BIT_LEFT;

				TileIndex next_tile_1 = TileAddWrap(tile, 0, 1);
				TrackBits next_track_1 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_X | TRACK_BIT_RIGHT : TRACK_BIT_3WAY_NE;

				TileIndex next_tile_2 = TileAddWrap(tile, -1, 0);
				TrackBits next_track_2 = _settings_game.pf.forbid_90_deg ? TRACK_BIT_Y | TRACK_BIT_RIGHT : TRACK_BIT_3WAY_SE;
			}
			return false;
		}
		return false;
	}
	return false;
}