Buildings and wonders

improvements[46] in GAME.C contains a sentinel, 21 city buildings, three spaceship parts and 21 wonders. Each record holds a 24-byte name and three 16-bit integers: cost, maintenance and prerequisite. Costs are in tens of shields for the human player.

Buildings use bits in the city’s buildings field. Improvement n uses bit n−1. CIV.H names the Palace, City Walls and SDI masks. Spaceship parts and wonders have separate state; they are not extra city-building bits.

A wonder can be built once. Improvement IDs 25–45 map to wonder IDs 1–21 in marvel_site, which records the city that built each wonder. Effects are tested at their use sites, so their scope varies: some affect one city, some its continent, and some the owning civilization.

civ_wonder() and active_wonder_city() in CITYMGT.C check obsolescence against improvement_words[22]. A wonder expires when any non-barbarian civilization knows its obsoleting technology. The sentinel 127 means no obsoleting technology.

Production table

struct improvement improvements[46] = {
    { "NONE", 8, 0, -1 },
    { "Palace", 20, 5, 16 },
    { "Barracks", 4, 0, -1 },
    { "Granary", 6, 1, 42 },
    { "Temple", 4, 1, 25 },
    { "MarketPlace", 8, 1, 2 },
    { "Library", 8, 1, 22 },
    { "Courthouse", 8, 1, 1 },
    { "City Walls", 12, 2, 16 },
    { "Aqueduct", 12, 2, 45 },
    { "Bank", 12, 3, 53 },
    { "Cathedral", 16, 3, 29 },
    { "University", 16, 3, 13 },
    { "Mass Transit", 16, 4, 41 },
    { "Colosseum", 10, 4, 45 },
    { "Factory", 20, 4, 35 },
    { "Mfg. Plant", 32, 6, 63 },
    { "SDI Defense", 20, 4, 57 },
    { "Recycling Cntr.", 20, 2, 61 },
    { "Power Plant", 16, 4, 55 },
    { "Hydro Plant", 24, 4, 15 },
    { "Nuclear Plant", 16, 2, 50 },
    { "SS Structural", 8, 0, 40 },
    { "SS Component", 16, 0, 60 },
    { "SS Module", 32, 0, 63 },
    { "Pyramids", 30, 0, 16 },
    { "Hanging Gardens", 30, 0, 42 },
    { "Colossus", 20, 0, 17 },
    { "Lighthouse", 20, 0, 7 },
    { "Great Library", 30, 0, 30 },
    { "Oracle", 30, 0, 26 },
    { "Great Wall", 30, 0, 16 },
    { "Magellan's Expedition", 40, 0, 8 },
    { "Michelangelo's Chapel", 30, 0, 29 },
    { "Copernicus' Observatory", 30, 0, 6 },
    { "Shakespeare's Theatre", 40, 0, 10 },
    { "Isaac Newton's College", 40, 0, 51 },
    { "J.S.Bach's Cathedral", 40, 0, 29 },
    { "Darwin's Voyage", 30, 0, 49 },
    { "Hoover Dam", 60, 0, 15 },
    { "Women's Suffrage", 60, 0, 35 },
    { "Manhattan Project", 60, 0, 27 },
    { "United Nations", 60, 0, 43 },
    { "Apollo Program", 60, 0, 40 },
    { "SETI Program", 60, 0, 21 },
    { "Cure for Cancer", 60, 0, 59 }
};

Obsolescence table

Values are technology IDs; see the technology table.

int improvement_words[22] = {
    -1, 43, 20, 54, 14, 13, 29, 34, 127, 43, 127, 15, 27, 127, 127, 127, 127, 127, 127, 127, 127, 127
};