Method ReadGeology

library/modules/Maps.cpp:967–1017

* Layer geology */

* Layer geology
*/
bool Maps::ReadGeology(vector<vector<int16_t> > *layer_mats, vector<df::coord2d> *geoidx)
{
    if (!world->world_data)
        return false;

    layer_mats->resize(eBiomeCount);
    geoidx->resize(eBiomeCount);

    for (int i = 0; i < eBiomeCount; i++)
    {
        (*layer_mats)[i].clear();
        (*geoidx)[i] = df::coord2d(-30000,-30000);
    }

    // regionX is in embark squares
    // regionX/16 is in 16x16 embark square regions
    df::coord2d map_region(world->map.region_x / 16, world->map.region_y / 16);

    // iterate over 8 surrounding regions + local region
    for (int i = eNorthWest; i < eBiomeCount; i++)
    {
        df::coord2d rgn_pos = getBiomeRgnPos(map_region, i);

        (*geoidx)[i] = rgn_pos;

        auto biome = getRegionBiome(rgn_pos);
        if (!biome)
            continue;

        // get index into geoblock vector
        int16_t geoindex = biome->geo_index;

        /// geology blocks have a vector of layer descriptors
        // get the vector with pointer to layers
        df::world_geo_biome *geo_biome = df::world_geo_biome::find(geoindex);
        if (!geo_biome)
            continue;

        auto &geolayers = geo_biome->layers;
        auto &matvec = (*layer_mats)[i];

        /// layer descriptor has a field that determines the type of stone/soil
        matvec.resize(geolayers.size());

        // finally, read the layer matgloss
        for (size_t j = 0; j < geolayers.size(); j++)
            matvec[j] = geolayers[j]->mat_index;
    }

    return true;
}

uint16_t Maps::getWalkableGroup(df::coord pos) {
    auto block = getTileBlock(pos);