tiles.hpp

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#pragma once

 
#include <array>
#include <cstdint>
 
#include <welder/vocabulary.hpp>
 
namespace wowlib::formats::wdl::chunks {
  struct [[
      =welder::weld,
      =welder::doc(R"(
        One tile's low-resolution heightmap (a MARE payload): a 17x17 grid of
        int16 heights with a 16x16 grid of midpoints, on the same scale as the
        full-resolution ADT heights. The background mountain silhouettes are
        drawn from these.)")
    ]] TileHeights {
    [[=welder::doc("The 17 x 17 outer grid heights, row-major.")]]
    std::array<std::int16_t, 17 * 17> outer{};
 
    [[=welder::doc("The 16 x 16 inner (midpoint) heights, row-major.")]]
    std::array<std::int16_t, 16 * 16> inner{};
  };
 
  static_assert(sizeof(TileHeights) == 1090);
 
  struct [[
      =welder::weld,
      =welder::doc(R"(
        One tile's hole mask (a MAHO payload, TBC+): 16 row bitmasks, one
        per chunk row (y), one bit per chunk column (x) — a set bit is a hole.
        Blizzard sets a bit when all 16 holes of the ADT chunk are set; an
        all-zero mask is always written anyway.)")
    ]] TileHoles {
    [[=welder::doc("The 16 row bitmasks (y rows, x bits); a set bit is a hole.")
    ]]
    std::array<std::uint16_t, 16> rows{};
  };
 
  static_assert(sizeof(TileHoles) == 32);
 
  struct [[
      =welder::weld,
      =welder::doc(R"(
        One tile's ocean mask (a MAOE payload, Legion+): a 32-byte mask
        selecting the ocean alpha texture — 0xFF bytes mean water everywhere,
        0x00 none. Emitted before the tile's hole mask.)")
    ]] TileOcean {
    [[=welder::doc("The mask bytes; 0xFF is water everywhere, 0x00 none.")]]
    std::array<std::uint8_t, 32> mask{};
  };
 
  static_assert(sizeof(TileOcean) == 32);
}