Function decode_path

plugins/siege-engine.cpp:847–874

};

static ProjectilePath decode_path(lua_State *L, int idx, df::coord origin)
{
    idx = lua_absindex(L, idx);

    Lua::StackUnwinder frame(L);
    df::coord goal;

    lua_getfield(L, idx, "target");
    Lua::CheckDFAssign(L, &goal, frame[1]);

    lua_getfield(L, idx, "delta");

    if (!lua_isnil(L, frame[2]))
    {
        lua_getfield(L, idx, "factor");
        int factor = luaL_optnumber(L, frame[3], ProjectilePath::DEFAULT_FUDGE);

        if (lua_isnumber(L, frame[2]))
            return ProjectilePath(origin, goal, lua_tonumber(L, frame[2]), factor);

        df::coord delta;
        Lua::CheckDFAssign(L, &delta, frame[2]);

        return ProjectilePath(origin, goal, delta, factor);
    }

    return ProjectilePath(origin, goal);
}

static int projPosAtStep(lua_State *L)
{