Method doBRiver

MicropolisCore/src/MicropolisEngine/src/generate.cpp:502–533

* Make a big river. * @param pos Start position of making a river. * @param riverDir Global direction of the river. * @param terrainDir Local direction of the terrain. * @return Last used local terrain direction. */

 * @return Last used local terrain direction.
 */
Direction2 Micropolis::doBRiver(const Position &riverPos,
                                Direction2 riverDir, Direction2 terrainDir)
{
    int rate1, rate2;

    if (terrainCurveLevel < 0) {
        rate1 = 100;
        rate2 = 200;
    } else {
        rate1 = terrainCurveLevel + 10;
        rate2 = terrainCurveLevel + 100;
    }

    Position pos(riverPos);

    while (testBounds(pos.posX + 4, pos.posY + 4)) {
        plopBRiver(pos);
        if (getRandom(rate1) < 10) {
            terrainDir = riverDir;
        } else {
            if (getRandom(rate2) > 90) {
                terrainDir = rotate45(terrainDir);
            }
            if (getRandom(rate2) > 90) {
                terrainDir = rotate45(terrainDir, 7);
            }
        }
        pos.move(terrainDir);
    }

    return terrainDir;
}

/**
 * Make a small river.