Function PlantFarmField

src/industry_cmd.cpp:1048–1097

}

static void PlantFarmField(TileIndex tile, IndustryID industry)
{
	if (_settings_game.game_creation.landscape == LandscapeType::Arctic) {
		if (GetTileZ(tile) + 2 >= GetSnowLine()) return;
	}

	/* determine field size */
	uint32_t r = (Random() & 0x303) + 0x404;
	if (_settings_game.game_creation.landscape == LandscapeType::Arctic) r += 0x404;
	uint size_x = GB(r, 0, 8);
	uint size_y = GB(r, 8, 8);

	TileArea ta(tile - TileDiffXY(std::min(TileX(tile), size_x / 2), std::min(TileY(tile), size_y / 2)), size_x, size_y);
	ta.ClampToMap();

	if (ta.w == 0 || ta.h == 0) return;

	/* check the amount of bad tiles */
	int count = 0;
	for (TileIndex cur_tile : ta) {
		assert(cur_tile < Map::Size());
		count += IsSuitableForFarmField(cur_tile, false, false);
	}
	if (count * 2 < ta.w * ta.h) return;

	/* determine type of field */
	r = Random();
	uint counter = GB(r, 5, 3);
	uint field_type = GB(r, 8, 8) * 9 >> 8;

	/* make field */
	for (TileIndex cur_tile : ta) {
		assert(cur_tile < Map::Size());
		if (IsSuitableForFarmField(cur_tile, true, true)) {
			MakeField(cur_tile, field_type, industry);
			SetClearCounter(cur_tile, counter);
			MarkTileDirtyByTile(cur_tile);
		}
	}

	int type = 3;
	if (_settings_game.game_creation.landscape != LandscapeType::Arctic && _settings_game.game_creation.landscape != LandscapeType::Tropic) {
		type = _plantfarmfield_type[Random() & 0xF];
	}

	SetupFarmFieldFence(ta.tile, ta.h, type, DIAGDIR_NE);
	SetupFarmFieldFence(ta.tile, ta.w, type, DIAGDIR_NW);
	SetupFarmFieldFence(ta.tile + TileDiffXY(ta.w - 1, 0), ta.h, type, DIAGDIR_SW);
	SetupFarmFieldFence(ta.tile + TileDiffXY(0, ta.h - 1), ta.w, type, DIAGDIR_SE);
}

void PlantRandomFarmField(const Industry *i)
{