#pragma once
// The large map (M, cUI_Megamap): a scrollable view of the 2048x2816 world
// map image. docs/hud.md, mods/megamap.cpp.

#include <cstdint>

namespace game {

// Scroll position (map pixel at the view's left / top edge).
constexpr size_t kMegamapScrollX = 0xc016c;
constexpr size_t kMegamapScrollY = 0xc0170;

inline int32_t MegamapScrollX(const uint8_t* megamap) {
    return *reinterpret_cast<const int32_t*>(megamap + kMegamapScrollX);
}
inline int32_t MegamapScrollY(const uint8_t* megamap) {
    return *reinterpret_cast<const int32_t*>(megamap + kMegamapScrollY);
}

struct Vec3 {
    float x, y, z;
};

// cUI_Megamap::WorldToMapPixel (0x6cb130, thiscall (out, world x / y / level),
// ret 8): the map pixel of a world position (world units, 53.66563 per tile).
// Linear: the world plane projection 0x622700, then x * 0.007446 + 1018.75,
// y * 0.014914 - 186.95.
inline Vec3 WorldToMapPixel(uint8_t* megamap, const Vec3& world) {
    Vec3 pixel = {};
    using Fn = void(__fastcall*)(uint8_t*, void*, Vec3*, const Vec3*);
    reinterpret_cast<Fn>(0x006cb130)(megamap, nullptr, &pixel, &world);
    return pixel;
}

constexpr float kWorldUnitsPerTile = 53.66563f;  // 0x8946b0

} // namespace game