dungeongen.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
// Copyright (C) 2015-2018 paramat
 
#pragma once
 
#include "voxel.h"
#include "noise.h"
#include "mapgen.h"
 
#define VMANIP_FLAG_DUNGEON_INSIDE VOXELFLAG_CHECKED1
#define VMANIP_FLAG_DUNGEON_PRESERVE VOXELFLAG_CHECKED2
#define VMANIP_FLAG_DUNGEON_UNTOUCHABLE (\
                VMANIP_FLAG_DUNGEON_INSIDE|VMANIP_FLAG_DUNGEON_PRESERVE)
 
class MMVManip;
class NodeDefManager;
 
v3s16 rand_ortho_dir(PseudoRandom &random, bool diagonal_dirs);
v3s16 turn_xz(v3s16 olddir, int t);
void random_turn(PseudoRandom &random, v3s16 &dir);
int dir_to_facedir(v3s16 d);
 
 
struct DungeonParams {
        s32 seed;
 
        content_t c_wall;
        // Randomly scattered alternative wall nodes
        content_t c_alt_wall;
        content_t c_stair;
 
        // 3D noise that determines which c_wall nodes are converted to c_alt_wall
        NoiseParams np_alt_wall;
 
        // Number of dungeons generated in mapchunk. All will use the same set of
        // dungeonparams.
        u16 num_dungeons;
        // Dungeons only generate in ground
        bool only_in_ground;
        // Number of rooms
        u16 num_rooms;
        // Room size random range. Includes walls / floor / ceilng
        v3s16 room_size_min;
        v3s16 room_size_max;
        // Large room size random range. Includes walls / floor / ceilng
        v3s16 room_size_large_min;
        v3s16 room_size_large_max;
        // Value 0 disables large rooms.
        // Value 1 results in 1 large room, the first generated room.
        // Value > 1 makes the first generated room large, all other rooms have a
        // '1 in value' chance of being large.
        u16 large_room_chance;
        // Dimensions of 3D 'brush' that creates corridors.
        // Dimensions are of the empty space, not including walls / floor / ceilng.
        // Diagonal corridors must have hole width >=2 to be passable.
        // Currently, hole width >= 3 causes stair corridor bugs.
        v3s16 holesize;
        // Corridor length random range
        u16 corridor_len_min;
        u16 corridor_len_max;
        // Diagonal corridors are possible, 1 in 4 corridors will be diagonal
        bool diagonal_dirs;
        // Usually 'GENNOTIFY_DUNGEON', but mapgen v6 uses 'GENNOTIFY_TEMPLE' for
        // desert dungeons.
        GenNotifyType notifytype;
};
 
class DungeonGen {
public:
        MMVManip *vm = nullptr;
        const NodeDefManager *ndef = nullptr;
        GenerateNotifier *gennotify = nullptr;
 
        u32 blockseed;
        PseudoRandom random;
        v3s16 csize;
 
        content_t c_torch;
        DungeonParams dp;
 
        // RoomWalker
        v3s16 m_pos;
        v3s16 m_dir;
 
        DungeonGen(const NodeDefManager *ndef,
                GenerateNotifier *gennotify, DungeonParams *dparams);
 
        void generate(MMVManip *vm, u32 bseed, v3s16 full_node_min, v3s16 full_node_max);
 
        void makeDungeon(v3s16 start_padding);
        void makeRoom(v3s16 roomsize, v3s16 roomplace);
        void makeCorridor(v3s16 doorplace, v3s16 doordir,
                v3s16 &result_place, v3s16 &result_dir);
        void makeDoor(v3s16 doorplace, v3s16 doordir);
        void makeFill(v3s16 place, v3s16 size, u8 avoid_flags, MapNode n, u8 or_flags);
        void makeHole(v3s16 place);
 
        bool findPlaceForDoor(v3s16 &result_place, v3s16 &result_dir);
        bool findPlaceForRoomDoor(v3s16 roomsize, v3s16 &result_doorplace,
                        v3s16 &result_doordir, v3s16 &result_roomplace);
 
        inline void randomizeDir()
        {
                m_dir = rand_ortho_dir(random, dp.diagonal_dirs);
        }
};
 
extern NoiseParams nparams_dungeon_density;
extern NoiseParams nparams_dungeon_alt_wall;