Method layRail

MicropolisCore/src/MicropolisEngine/src/connect.cpp:353–439

* Lay a rail, and update connections (rail, road, and wire) around it. * @param x X map coordinate. * @param y Y map coordinate. * @param effects Modification collecting object. * @return Tool result. */

 * @return Tool result.
 */
ToolResult Micropolis::layRail(int x, int y, ToolEffects *effects)
{
    int cost = 20;

    MapTile tile = effects->getMapTile(x, y);

    tile = neutralizeRoad(tile);

    switch (tile) {
    case DIRT:                   /* Rail on Dirt */

        effects->setMapValue(x, y, LHRAIL | BULLBIT | BURNBIT);

        break;

    case RIVER:      /* Rail on Water */
    case REDGE:
    case CHANNEL:    /* Check how to build underwater tunnel, if possible. */

        cost = 100;

        if (x < WORLD_W - 1) {
            tile = effects->getMapTile(x + 1, y);
            tile = neutralizeRoad(tile);
            if (tile == RAILHPOWERV || tile == HRAIL
                                    || (tile >= LHRAIL && tile <= HRAILROAD)) {
                effects->setMapValue(x, y, HRAIL | BULLBIT);
                break;
            }
        }

        if (x > 0) {
            tile = effects->getMapTile(x - 1, y);
            tile = neutralizeRoad(tile);
            if (tile == RAILHPOWERV || tile == HRAIL
                                    || (tile > VRAIL && tile < VRAILROAD)) {
                effects->setMapValue(x, y, HRAIL | BULLBIT);
                break;
            }
        }

        if (y < WORLD_H - 1) {
            tile = effects->getMapTile(x, y + 1);
            tile = neutralizeRoad(tile);
            if (tile == RAILVPOWERH || tile == VRAILROAD
                                    || (tile > HRAIL && tile < HRAILROAD)) {
                effects->setMapValue(x, y, VRAIL | BULLBIT);
                break;
            }
        }

        if (y > 0) {
            tile = effects->getMapTile(x, y - 1);
            tile = neutralizeRoad(tile);
            if (tile == RAILVPOWERH || tile == VRAILROAD
                                    || (tile > HRAIL && tile < HRAILROAD)) {
                effects->setMapValue(x, y, VRAIL | BULLBIT);
                break;